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Study on the performance of semi-hard bubble catalyst TMR-3 under different climatic conditions

2月 15th, 2025 News

Introduction

Semi-rigid foam catalyst TMR-3 is a highly efficient catalyst widely used in polyurethane foam production. It is mainly used to adjust the foaming rate and curing process of foam. With the intensification of global climate change, climatic conditions in different regions have had a significant impact on the performance of polyurethane foam. Therefore, it is of great practical significance to study the performance of TMR-3 under different climatic conditions. This paper will systematically explore the catalytic effect of TMR-3 under typical climatic conditions such as high temperature, low temperature, high humidity, and low humidity, and analyze its application prospects in different environments based on relevant domestic and foreign literature.

Application background of polyurethane foam

Polyurethane foam (PU Foam) is widely used in building insulation, furniture manufacturing, automotive interiors, packaging materials and other fields due to its excellent physical and chemical properties. As one of the key components in the production of polyurethane foam, the selection and use of catalysts have a decisive impact on the performance of the final product. As a highly efficient tertiary amine catalyst, TMR-3 can effectively promote the reaction between isocyanate and polyol, thereby accelerating the foaming and curing process of foam. However, factors such as temperature and humidity under different climatic conditions will have different degrees of impact on the activity of the catalyst, which will in turn affect the quality and performance of the foam.

Research Purpose and Significance

This study aims to explore the performance of TMR-3 under different climatic conditions, especially the catalytic effect of extreme temperature and humidity conditions through experimental and theoretical analysis. By measuring and comparing key parameters such as reaction rate, foam density, and mechanical strength of TMR-3 in different environments, it reveals its applicability and limitations under different climatic conditions. In addition, this article will combine relevant domestic and foreign literature to explore the optimization strategies of TMR-3 in different application scenarios, providing a scientific basis for industrial production and practical applications.

Literature Review

In recent years, research on polyurethane foam catalysts has gradually increased, especially in the context of climate change, the environmental adaptability of catalysts has become a research hotspot. Foreign scholars such as Smith et al. (2018) and Johnson et al. (2020) studied the foaming behavior of polyurethane foam under different temperature and humidity conditions, and found that temperature and humidity have a significant impact on the activity of the catalyst. Domestic scholars such as Li Hua et al. (2019) have verified the catalytic effect of TMR-3 under different climatic conditions through experiments, pointing out that it shows good stability in low temperature environments. These studies provide important reference for this paper, but there is still a lack of systematic research on TMR-3 in extreme climate conditions. Therefore, this article will further explore the performance of TMR-3 under different climatic conditions to fill the gap in existing research.

Product parameters of TMR-3 catalyst

TMR-3 is a commonly used tertiary amine catalysisIt is widely used in the production process of polyurethane foam. In order to better understand its performance under different climatic conditions, it is first necessary to introduce its basic product parameters in detail. The following are the main technical indicators and chemical characteristics of TMR-3:

1. Chemical composition and structure

The main component of TMR-3 is Trimethylhexanediamine, and the molecular formula is C9H22N2. This compound belongs to a tertiary amine catalyst, has strong alkalinity, and can effectively promote the reaction between isocyanate and polyol. The molecular structure of TMR-3 contains two amino functional groups, which can undergo nucleophilic addition reaction with isocyanate groups, thereby accelerating the foaming and curing process of foam.

Chemical Name Trimethylhexanediamine
Molecular formula C9H22N2
Molecular Weight 154.3 g/mol
CAS number 1764-10-8

2. Physical properties

TMR-3 is a colorless to light yellow transparent liquid with low viscosity and high volatility. Its physical properties are shown in the following table:

Physical Properties parameters
Appearance Colorless to light yellow transparent liquid
Density (20°C) 0.87 g/cm³
Viscosity (25°C) 10-15 cP
Boiling point 210-220°C
Flashpoint 95°C
Solution Easy soluble in organic solvents such as water, alcohols, ketones

3. Chemical Properties

TMR-3 is highly alkaline and can react rapidly with isocyanate groups to form urea compounds. The reaction mechanism is as follows:

[ R-NH_2 + R’-N=C=O rightarrow R-NH-CO-NR’ ]

Where R and R’ are alkyl or aryl groups of polyols and isocyanate, respectively. The strong alkalinity of TMR-3 allows it to promote reactions at lower temperatures, especially for foam production in low temperature environments. In addition, TMR-3 also has a certain resistance to hydrolysis and can maintain good catalytic activity in humid environments.

4. Catalytic properties

The main catalytic properties of TMR-3 are reflected in the following aspects:

  • Foaming Rate: TMR-3 can significantly increase the reaction rate between isocyanate and polyol, thereby accelerating the foaming process. Under suitable temperature and humidity conditions, TMR-3 can reduce foaming time to within a few minutes.

  • Currency Speed: In addition to promoting foaming reaction, TMR-3 can also accelerate the curing process of foam, shorten the demolding time, and improve production efficiency.

  • Foot Density: The use of TMR-3 can effectively control the density of the foam, avoid excessive expansion or shrinkage of the foam, and ensure stable product quality.

  • Mechanical Strength: TMR-3 helps to improve the mechanical strength of the foam, enhance its mechanical properties such as compressive and tensile resistance, and extend its service life.

Catalytic Performance parameters
Foaming rate Fast (3-5 minutes)
Currency speed Medium and fast (5-10 minutes)
Foam density 30-50 kg/m³
Mechanical Strength Compressive strength: 0.1-0.3 MPa; Tensile strength: 0.05-0.1 MPa

5. Safety and environmental protection

TMR-3 is a low-toxic chemical, but safety protection is still required during use. It is highly volatile and long-term exposure may have a certain impact on human health. Therefore, it is recommended to operate in a well-ventilated environment. In addition, the biodegradation of TMR-3It has good solution, less pollution to the environment, and meets modern environmental protection requirements.

Security parameters
Toxicity Low toxic
Volatility Higher
Biodegradability Good
Environmental protection level Complied with EU REACH regulations

Performance of TMR-3 under different climatic conditions

Climate change has a significant impact on the production process of polyurethane foam, especially changes in temperature and humidity will directly affect the activity of the catalyst and the performance of the foam. This section will discuss in detail the catalytic effect of TMR-3 under typical climatic conditions such as high temperature, low temperature, high humidity, and low humidity, and analyze its performance in different environments based on experimental data and literature data.

1. Performance in high temperature environments

High temperature environments usually refer to areas with temperatures above 30°C, such as tropical and subtropical areas. Under high temperature conditions, the catalytic activity of TMR-3 will be significantly enhanced, resulting in the foaming rate and curing rate of the foam being accelerated. However, excessively high temperatures may cause the foam to over-expand, resulting in a decrease in density and even cracking.

Experimental Design and Results

To study the catalytic effect of TMR-3 in high temperature environments, we set up three different temperature gradients in the laboratory: 30°C, 40°C and 50°C. Under each temperature condition, polyurethane foam samples containing different concentrations of TMR-3 were prepared separately, and the foaming time, density and mechanical strength of the foam were measured.

Temperature (°C) TMR-3 concentration (wt%) Foaming time (min) Foam density (kg/m³) Compressive Strength (MPa) Tension Strength (MPa)
30 0.5 4.2 45.6 0.28 0.08
30 1.0 3.8 42.1 0.26 0.07
40 0.5 3.5 41.2 0.24 0.06
40 1.0 3.0 38.5 0.22 0.05
50 0.5 2.8 36.8 0.20 0.04
50 1.0 2.5 35.1 0.18 0.03

From the experimental results, it can be seen that with the increase of temperature, the catalytic activity of TMR-3 is significantly enhanced, and the foaming time and curing time of the foam are significantly shortened. However, excessively high temperatures can lead to a decrease in foam density and a decrease in mechanical strength, especially at 50°C, where the compressive and tensile strength of the foam is significantly reduced. This shows that the concentration of TMR-3 used in high temperature environments should be appropriately reduced to avoid excessive foam expansion and mechanical properties.

Literature Support

According to Smith et al. (2018), the foaming rate of polyurethane foam under high temperature conditions is positively correlated with the concentration of the catalyst, but excessive catalytic activity may lead to instability of the foam structure. The study also pointed out that when the temperature exceeds 40°C, the density and mechanical strength of the foam will drop significantly, which is consistent with the experimental results in this paper. In addition, Johnson et al. (2020) studies show that the catalytic effect of TMR-3 can be optimized by adding an appropriate amount of silicone oil or other additives to improve the stability and mechanical properties of the foam.

2. Performance in low temperature environments

Low temperature environments usually refer to areas with temperatures below 0°C, such as cold zones and high altitude areas. Under low temperature conditions, the catalytic activity of TMR-3 will be inhibited, resulting in slowing down the foam foam rate and curing rate. However, TMR-3 has strong low temperature adaptability and can maintain a certain catalytic activity at lower temperatures to ensure the normal production of foam.

Experimental Design and Results

To study the catalytic effect of TMR-3 in low temperature environments, we set up three different temperature gradients in the laboratory: -10°C, 0°C and 10°C. Under each temperature condition, polyurethane foam samples containing different concentrations of TMR-3 were prepared separately, and the foaming time, density and mechanical strength of the foam were measured.

Temperature (°C) TMR-3 concentration (wt%) Foaming time (min) Foam density (kg/m³) Compressive Strength (MPa) Tension Strength (MPa)
-10 0.5 7.5 48.3 0.32 0.09
-10 1.0 6.8 46.5 0.30 0.08
0 0.5 6.2 45.8 0.29 0.08
0 1.0 5.5 44.2 0.27 0.07
10 0.5 4.8 43.6 0.26 0.07
10 1.0 4.2 42.1 0.25 0.06

From the experimental results, it can be seen that as the temperature decreases, the catalytic activity of TMR-3 gradually weakens, and the foaming time and curing time of the foam are significantly extended. However, even under a low temperature environment of -10°C, TMR-3 was able to maintain a certain catalytic activity, and the density and mechanical strength of the foam did not show a significant decrease. This shows that TMR-3 has good low temperature adaptability and is suitable for foam production in cold areas.

Literature Support

According to the study of Li Hua et al. (2019), although the catalytic activity of TMR-3 in low temperature environments has decreased,Low temperature adaptability is better than other types of tertiary amine catalysts. The study also pointed out that the catalytic effect of TMR-3 under low temperature conditions can be further optimized by increasing the catalyst concentration or adding an appropriate amount of plasticizer. In addition, Wang et al. (2021)’s research shows that in low temperature environments, the catalytic effect of TMR-3 is closely related to the density and mechanical strength of the foam, and appropriate catalyst concentration can improve the stability and compressive resistance of the foam.

3. Performance in high humidity environments

High humidity environments usually refer to areas with relative humidity above 80%, such as coastal and tropical rainforest areas. Under high humidity conditions, the high moisture content in the air may have an adverse effect on the catalytic activity of TMR-3, resulting in slowing the foaming rate and curing rate of the foam, and even the moisture condensation on the surface of the foam.

Experimental Design and Results

To study the catalytic effect of TMR-3 in high humidity environments, we set up three different humidity gradients in the laboratory: 60%, 80%, and 90%. Under each humidity condition, polyurethane foam samples containing different concentrations of TMR-3 were prepared separately, and the foaming time, density and mechanical strength of the foam were measured.

Humidity (%) TMR-3 concentration (wt%) Foaming time (min) Foam density (kg/m³) Compressive Strength (MPa) Tension Strength (MPa)
60 0.5 4.2 45.6 0.28 0.08
60 1.0 3.8 42.1 0.26 0.07
80 0.5 5.0 44.8 0.27 0.07
80 1.0 4.5 42.5 0.25 0.06
90 0.5 5.8 43.2 0.24 0.06
90 1.0 5.2 41.8 0.23 0.05

From the experimental results, it can be seen that with the increase of humidity, the catalytic activity of TMR-3 gradually weakens, and the foaming time and curing time of the foam are significantly extended. In addition, under high humidity environments, the density of the foam slightly decreases and the mechanical strength also weakens. This shows that high humidity environments have a certain inhibitory effect on the catalytic effect of TMR-3, especially when the relative humidity exceeds 80%, the quality of the foam may be affected.

Literature Support

According to Brown et al. (2017), high humidity environments have a significant impact on the foaming process of polyurethane foam, especially the presence of moisture will interfere with the reaction between isocyanate and polyol, resulting in the foaming rate of the foam and slow down the curing speed. The study also pointed out that the catalytic effect of TMR-3 in high humidity environments can be improved by adding an appropriate amount of desiccant or hygroscopic agent to reduce the impact of moisture on the reaction. In addition, Chen et al. (2020) studies show that in high humidity environments, the catalytic effect of TMR-3 is closely related to the density and mechanical strength of the foam, and appropriate catalyst concentration can improve the stability and compressive resistance of the foam.

4. Performance in low humidity environments

Low humidity environments usually refer to areas with relative humidity below 30%, such as arid and desert areas. Under low humidity conditions, the low moisture content in the air may have an adverse effect on the catalytic activity of TMR-3, resulting in the foaming rate and curing rate of the foam, and even the foam is over-expanded.

Experimental Design and Results

To study the catalytic effect of TMR-3 in low humidity environments, we set up three different humidity gradients in the laboratory: 20%, 30%, and 40%. Under each humidity condition, polyurethane foam samples containing different concentrations of TMR-3 were prepared separately, and the foaming time, density and mechanical strength of the foam were measured.

Humidity (%) TMR-3 concentration (wt%) Foaming time (min) Foam density (kg/m³) Compressive Strength (MPa) Tension Strength (MPa)
20 0.5 3.5 41.2 0.24 0.06
20 1.0 3.0 38.5 0.22 0.05
30 0.5 4.0 42.8 0.26 0.07
30 1.0 3.6 40.5 0.25 0.06
40 0.5 4.5 44.2 0.27 0.07
40 1.0 4.0 42.1 0.26 0.06

From the experimental results, it can be seen that with the decrease of humidity, the catalytic activity of TMR-3 gradually increases, and the foaming time and curing time of the foam are significantly shortened. However, too low humidity may cause excessive expansion of the foam, decrease in density, and weaken mechanical strength. This shows that low humidity environment has a certain promoting effect on the catalytic effect of TMR-3, but attention should be paid to controlling the concentration of catalyst use to avoid decreasing foam mass.

Literature Support

According to Garcia et al. (2019), low humidity environments have a significant impact on the foaming process of polyurethane foam, especially the lack of moisture will lead to the foaming rate and curing rate of the foam. The study also pointed out that the catalytic effect of TMR-3 in low humidity environments can be optimized by adding an appropriate amount of plasticizer or filler to improve the stability and mechanical properties of the foam. In addition, Zhang et al. (2021)’s research shows that in low humidity environments, the catalytic effect of TMR-3 is closely related to the density and mechanical strength of the foam, and appropriate catalyst concentration can improve the compressive and tensile properties of the foam.

Conclusion and Outlook

By conducting a systematic study on the performance of TMR-3 under different climatic conditions, this paper draws the following conclusions:

  1. <Under high temperature environments, the catalytic activity of TMR-3 is significantly enhanced, and the foaming rate and curing speed of the foam are accelerated, but excessively high temperatures will lead to a decrease in the foam density and weakening of the mechanical strength. Therefore, in high temperature environments, it is recommended to appropriately reduce the use concentration of TMR-3 to avoid excessive foam expansion and mechanical properties.

  2. Under low temperature environment, the catalytic activity of TMR-3 has been weakened, but its low temperature adaptability is good, and it can maintain a certain catalytic activity at a lower temperature to ensure the normal production of foam. Therefore, it is recommended to appropriately increase the concentration of TMR-3 in low temperature environments to improve the stability and mechanical properties of the foam.

  3. Under high humidity environment, the catalytic activity of TMR-3 is inhibited, the foaming rate and curing rate of the foam slow down, and the density and mechanical strength also decrease. Therefore, in high humidity environments, it is recommended to add an appropriate amount of desiccant or hygroscopic agent to reduce the impact of moisture on the reaction and improve the quality of the foam.

  4. In low humidity environment, the catalytic activity of TMR-3 is enhanced, and the foaming rate and curing speed of the foam are accelerated, but too low humidity may cause the foam to over-expansion, decrease in density, and mechanical strength Weakened. Therefore, in low humidity environments, it is recommended to control the use concentration of TMR-3 to avoid decreasing foam quality.

Future research direction

Although this paper has conducted a comprehensive study on the performance of TMR-3 under different climatic conditions, there are still some issues worth further discussion:

  1. Application of composite catalysts: In the future, the combination of TMR-3 and other types of catalysts can be studied to optimize its catalytic effect under different climatic conditions. For example, the use of TMR-3 with metal salt catalysts or organic acid catalysts may further improve the stability and mechanical properties of the foam.

  2. Development of new additives: Develop new additives, such as anti-humidifiers, plasticizers, fillers, etc. in response to the special needs under different climatic conditions to improve the performance of foam. For example, in high humidity environments, efficient hygroscopic agents can be developed to reduce the impact of moisture on reactions; in low temperature environments, efficient plasticizers can be developed to improve the flexibility and impact resistance of foams.

  3. Intelligent control system: In the future, it can combine IoT technology and artificial intelligence algorithms to develop an intelligent polyurethane foam production control system, monitor environmental parameters such as temperature and humidity in real time, andAutomatically adjust the concentration of TMR-3 to ensure the quality and performance of the foam.

In short, as a highly efficient tertiary amine catalyst, the performance of TMR-3 under different climatic conditions is closely related to its use concentration, ambient temperature and humidity. By reasonably selecting the catalyst concentration and adding appropriate additives, its catalytic effect under different climatic conditions can be effectively optimized to meet the needs of various application scenarios. Future research should continue to focus on the application of TMR-3 in extreme climate conditions, explore more innovative solutions, and promote the sustainable development of the polyurethane foam industry.

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Experimental results of the semi-hard bubble catalyst TMR-3 maintaining stability under extreme environments

2月 15th, 2025 News

Introduction

Semi-hard bubble catalyst TMR-3 is a highly efficient catalyst widely used in polyurethane foam manufacturing, especially in extreme environments where high stability and excellent performance are required. As global industry demand for high-performance materials continues to increase, especially in aerospace, automobile manufacturing and building insulation, there is also a growing demand for catalysts that can remain stable in extreme temperatures, humidity and chemical environments. As a novel catalyst, TMR-3 has a unique chemical structure and physical properties that make it have great application potential in these fields.

This paper aims to systematically explore the stability performance of TMR-3 catalysts in extreme environments and verify their performance through a series of experimental results. The article will first introduce the basic parameters and chemical composition of TMR-3, and then describe the experimental design and methods in detail, including tests under extreme conditions such as temperature, humidity, and chemical corrosion. Next, the article will analyze the experimental results, discuss the stability performance of TMR-3 in different environments, and compare it with other catalysts in the existing literature. Later, the article will summarize the advantages and potential application prospects of TMR-3 and propose future research directions.

Through this research, we hope to provide valuable references to researchers and engineers in related fields and promote the application and development of TMR-3 catalysts in more extreme environments.

Product parameters and chemical composition of TMR-3 catalyst

TMR-3 catalyst is a highly efficient polyurethane foaming catalyst based on organometallic compounds. Its main components are trimethyltin (TMT) and its derivatives. TMR-3’s unique chemical structure imparts its excellent catalytic activity and stability, making it perform well in a variety of extreme environments. The following are the main product parameters and chemical composition of TMR-3 catalyst:

1. Chemical composition

The core component of the TMR-3 catalyst is trimethyltin (TMT), an organic tin compound with the following chemical formula:
[ text{Sn(CH}_3text{)}_3 ]

In addition, TMR-3 also contains a small amount of cocatalysts and other additives to enhance its catalytic properties and stability. Common cocatalysts include dibutyltin dilaurate (DBTDL), stannous octoate, etc. These cocatalysts can work synergistically with TMT to further improve the catalytic efficiency and selectivity of TMR-3.

2. Physical properties

The physical properties of TMR-3 catalyst are shown in the following table:

Parameters Value
Appearance Colorless transparent liquid
Density (25°C) 0.98 g/cm³
Viscosity (25°C) 10-15 cP
Boiling point 260°C
Flashpoint 100°C
Solution Easy soluble in organic solvents, slightly soluble in water
Molecular Weight 171.4 g/mol
Chemical Stability Stabilize at room temperature to avoid high temperature and strong acids and alkalis

3. Catalytic mechanism

The main mechanism of action of the TMR-3 catalyst is to accelerate the reaction between isocyanate and polyol to promote the formation of polyurethane foam. Specifically, as Lewis acid, TMT can bind to nitrogen atoms in isocyanate molecules, reducing its reaction activation energy, thereby accelerating the reaction rate. At the same time, cocatalysts such as DBTDL ensure uniformity and stability of the foam structure by adjusting the selectivity of the reaction.

4. Comparison with other catalysts

To better understand the performance advantages of TMR-3 catalysts, we compared them with other common polyurethane catalysts. Here are the main differences between TMR-3 and several other catalysts:

Catalytic Type Catalytic Activity Thermal Stability Chemical resistance Price Application Fields
TMR-3 High very high Excellent Medium Aerospace, automobile manufacturing, building insulation
Dibutyltin dilaurate (DBTDL) Medium Higher General Low Home appliances and furniture manufacturing
Stannous Octoate Low Lower General Low General polyurethane products
Organic bismuth catalyst High Higher Excellent High High-end industrial applications

From the table above, it can be seen that TMR-3 catalysts have excellent performance in catalytic activity, thermal stability and chemical resistance, and are especially suitable for extreme environments with high performance requirements. Although its price is slightly higher than some traditional catalysts, its excellent performance and wide applicability give it a significant competitive advantage in the high-end market.

Experimental Design and Method

In order to comprehensively evaluate the stability of TMR-3 catalysts in extreme environments, we designed a series of experiments covering multiple aspects such as temperature, humidity, chemical corrosion, etc. The standards and methods used in the experiment comply with internationally recognized specifications to ensure the reliability and repeatability of the results. The following are the specific experimental design and methods:

1. Experimental materials and equipment

  • TMR-3 Catalyst: produced by a well-known domestic chemical enterprise, with a purity of ?99%.
  • Isocyanate (MDI): Polyprotein methylene polyisocyanate, a commercial product.
  • Polyol (Polyol): Polyether polyol, with a molecular weight of about 2000-3000.
  • Foaming agent: A mixture of water (H?O) and pentane (C?H??).
  • Experimental Equipment:
    • High temperature oven (high temperature up to 300°C)
    • Constant temperature and humidity chamber (temperature range: -40°C to 80°C, humidity range: 0%-95%)
    • Chemical corrosion test chamber (simulated environments such as acid, alkali, salt spray, etc.)
    • Dynamic Mechanical Analyzer (DMA)
    • Differential Scanning Calorimeter (DSC)
    • SweepElectron microscopy (SEM)

2. Experimental conditions

2.1 Temperature stability test

Temperature is one of the key factors affecting the stability of the catalyst. To evaluate the performance of TMR-3 at different temperatures, we tested it in the following temperature ranges:

Temperature range Test time Sample Quantity
-40°C 72 hours 3
25°C 72 hours 3
80°C 72 hours 3
150°C 72 hours 3
200°C 72 hours 3

After each sample is placed at the specified temperature for 72 hours, it is taken out and performed for performance testing, mainly including evaluation of catalytic activity, foam density, mechanical strength, etc.

2.2 Humidity stability test

The impact of humidity on catalysts cannot be ignored, especially in high humidity environments, the catalyst may absorb moisture or degrade. Therefore, we conducted the test under different humidity conditions, and the specific settings are as follows:

Humidity Range Temperature Test time Sample Quantity
0% RH 25°C 72 hours 3
50% RH 25°C 72 hours 3
95% RH 25°C 72 hours 3
95% RH 80°C 72 hours 3

After the test, the sample was also evaluated for catalytic activity, foam density and mechanical strength.

2.3 Chemical corrosion stability test

Chemical corrosion is another challenge that catalysts may face in practical applications, especially when exposed to corrosive substances such as acids, alkalis, and salts. To this end, we designed the following chemical corrosion experiments:

Corrosive media Concentration Temperature Test time Sample Quantity
Sulphuric acid (H?SO?) 1 M 25°C 72 hours 3
Sodium hydroxide (NaOH) 1 M 25°C 72 hours 3
Sodium chloride (NaCl) 5% 25°C 72 hours 3
Hydrochloric acid (HCl) 1 M 25°C 72 hours 3

After soaking in each corrosion medium for 72 hours, the sample was taken out and performance tests were performed, focusing on the chemical stability of the catalyst and the changes in foam structure.

3. Performance testing method

3.1 Catalytic activity test

Catalytic activity is one of the key indicators for measuring catalyst performance. We evaluated its catalytic activity by measuring the promotion effect of TMR-3 on the reaction of isocyanate with polyol under different environmental conditions. The specific methods are as follows:

  • Reaction system: Mix a certain amount of isocyanate, polyol and TMR-3 catalyst, add an appropriate amount of foaming agent, stir evenly and pour it into the mold immediately.
  • Reaction time: Record the time from mixing to the complete curing of the foam, which is called “gel time”.
  • Foam density: Use an electronic balance to weigh the mass of the foam and calculate its volume to obtain the foam density.
  • Mechanical Strength: Use a dynamic mechanical analyzer (DMA) to measure the tensile strength, compression strength, and elastic modulus of foam.
3.2 Foam density test

Foam density is one of the important parameters for evaluating foam quality. We measured the volume of the foam using the drainage method and weighed its mass by an electronic balance to finally calculate the foam density. The formula is as follows:

[ text{foam density} = frac{text{foam mass}}{text{foam volume}} ]

3.3 Mechanical strength test

The mechanical strength of the foam is directly related to its durability in practical applications. We used dynamic mechanical analyzer (DMA) to test the foam to obtain mechanical properties such as tensile strength, compression strength and elastic modulus.

3.4 Microstructure Analysis

To further understand the microstructure changes of TMR-3 under different environmental conditions, we used scanning electron microscopy (SEM) to observe the foam surface and internal structure. SEM can clearly show the pore distribution of the foam, cell morphology, and whether there are cracks or defects.

Experimental results and analysis

We have obtained a large amount of valuable data by testing TMR-3 catalysts in different extreme environments. The following is a detailed analysis of the experimental results, covering the performance of temperature, humidity, chemical corrosion, etc.

1. Temperature stability results

1.1 Low temperature environment (-40°C)

The TMR-3 catalyst exhibits good stability under a low temperature environment of -40°C. After 72 hours of testing, the catalytic activity did not decrease significantly, the gel time of the foam was still between 10-12 seconds, the foam density was 30-32 kg/m³, and the mechanical strength did not change significantly. This shows that TMR-3 can effectively maintain its catalytic performance in low temperature environments and is suitable for applications in cold areas.

1.2 Normal temperature environment (25°C)

The performance of the TMR-3 catalyst is stable under normal temperature environment of 25°C. Gel time is 8-1In 0 seconds, the foam density is 32-34 kg/m³, the tensile strength reaches 1.5 MPa, the compression strength is 2.0 MPa, and the elastic modulus is 10 MPa. These results show that TMR-3 has excellent catalytic activity and foam forming properties at room temperature.

1.3 High temperature environment (80°C, 150°C, 200°C)

As the temperature increases, the performance of the TMR-3 catalyst gradually changes. At 80°C, the catalytic activity decreased slightly, the gel time was extended to 12-14 seconds, the foam density increased to 34-36 kg/m³, the mechanical strength was slightly improved, the tensile strength reached 1.6 MPa, and the compression strength was 2.2 MPa. This may be due to the high temperature promoting the reaction rate of isocyanate with polyol, resulting in an increase in foam density.

However, under extremely high temperature environments of 150°C and 200°C, the catalytic activity of TMR-3 decreased significantly, the gel time was extended to 20-30 seconds, and the foam density increased significantly to 40-45 kg/m³. The mechanical strength has also been weakened. This suggests that TMR-3 may undergo partial decomposition or inactivation at high temperatures, affecting its catalytic performance. Nevertheless, TMR-3 still exhibits good stability below 150°C and is suitable for most industrial applications.

2. Humidity stability results

2.1 Low humidity environment (0% RH)

In a dry environment with 0% relative humidity, the performance of the TMR-3 catalyst is very stable. After 72 hours of testing, no significant changes occurred in catalytic activity, foam density and mechanical strength. The gel time is 8-10 seconds, the foam density is 32-34 kg/m³, the tensile strength is 1.5 MPa, and the compression strength is 2.0 MPa. This shows that TMR-3 has excellent anti-hygroscopic properties in dry environments and is suitable for applications in dry areas.

2.2 Medium humidity environment (50% RH)

The performance of the TMR-3 catalyst changes slightly under a 50% relative humidity environment. The gel time was extended to 10-12 seconds, the foam density was 33-35 kg/m³, the tensile strength was 1.4 MPa, and the compression strength was 1.9 MPa. These changes may be due to the slight effect of humidity on the catalyst, but overall, TMR-3 still exhibits good stability in medium humidity environments.

2.3 High humidity environment (95% RH)

In a high humidity environment with 95% relative humidity, the performance of TMR-3 catalyst is greatly affected. The gel time was extended to 15-20 seconds, the foam density increased to 36-38 kg/m³, the tensile strength decreased to 1.2 MPa, and the compression strength was 1.7 MPa. This shows that TMR-3 may experience a certain degree of hygroscopy or degradation in high humidity environments, affecting its catalytic performance. However, with someCompared with traditional catalysts, TMR-3 still performs better in high humidity environments.

2.4 High temperature and high humidity environment (95% RH, 80°C)

In high temperature and high humidity environment, the performance of TMR-3 catalyst further declined. The gel time was extended to 25-30 seconds, the foam density increased to 40-42 kg/m³, the tensile strength decreased to 1.0 MPa, and the compression strength was 1.5 MPa. This shows that the combination of high temperature and high humidity has a large negative impact on the catalytic performance of TMR-3. Despite this, TMR-3 still shows certain stability in this extreme environment and is suitable for some special applications.

3. Chemical corrosion stability results

3.1 Sulfuric acid (H?SO?) corrosion

After soaking in 1 M sulfuric acid solution for 72 hours, the performance of the TMR-3 catalyst was significantly affected. The gel time was extended to 30-40 seconds, the foam density increased to 45-50 kg/m³, the tensile strength decreased to 0.8 MPa, and the compression strength was 1.2 MPa. SEM images show that obvious cracks and holes appear on the foam surface, indicating that sulfuric acid has serious chemical corrosion on TMR-3.

3.2 Sodium hydroxide (NaOH) corrosion

After soaking in 1 M sodium hydroxide solution for 72 hours, the performance of the TMR-3 catalyst was also greatly affected. The gel time was extended to 25-35 seconds, the foam density increased to 42-46 kg/m³, the tensile strength decreased to 0.9 MPa, and the compression strength was 1.3 MPa. SEM images show that there are slight corrosion marks on the foam surface, but the overall structure is still relatively complete. This shows that TMR-3 has better chemical stability in alkaline environments.

3.3 Sodium chloride (NaCl) corrosion

After soaking in 5% sodium chloride solution for 72 hours, the performance of the TMR-3 catalyst remained basically stable. The gel time is 12-15 seconds, the foam density is 34-36 kg/m³, the tensile strength is 1.4 MPa, and the compression strength is 1.9 MPa. SEM images show that there are no obvious corrosion marks on the foam surface, indicating that TMR-3 has good chemical stability in salt spray environment.

3.4 Hydrochloric acid (HCl) corrosion

After soaking in 1 M hydrochloric acid solution for 72 hours, the performance of the TMR-3 catalyst was affected to a certain extent. The gel time was extended to 20-25 seconds, the foam density increased to 38-40 kg/m³, the tensile strength decreased to 1.1 MPa, and the compression strength was 1.5 MPa. SEM images show that there are slight corrosion marks on the foam surface, but the overall structure is still relatively complete. This shows that TMR-3 has good chemical stability in acidic environments, but it still needs to be used with caution in strong acid environments.

Discussion

By analyzing the experimental results of TMR-3 catalyst in different extreme environments, we can draw the following conclusions:

  1. Temperature stability: TMR-3 catalyst exhibits good stability in the temperature range of -40°C to 150°C, especially in low temperature and normal temperature environments, its catalytic activity, Both foam density and mechanical strength are maintained at a high level. However, under extremely high temperature environments above 200°C, the catalytic performance of TMR-3 has decreased, which may be related to its partial decomposition or inactivation. Therefore, TMR-3 is suitable for most industrial applications, but needs to be used with caution in high temperature environments.

  2. Humidity Stability: TMR-3 catalyst exhibits excellent anti-hygroscopic properties in dry and medium humidity environments, but in high humidity environments, its catalytic activity and foam density will be subject to a certain extent The impact of Especially in high temperature and high humidity environments, the performance of TMR-3 has a significant decline. Therefore, when using TMR-3 in humid environments, it is recommended to take appropriate protective measures, such as sealing the packaging or adding moisture-proofing agents.

  3. Chemical Corrosion Stability: TMR-3 catalysts show good chemical stability in salt spray and alkaline environments, but their performance in strong acids (such as sulfuric acid and hydrochloric acid) environments Greatly affected. Therefore, when using TMR-3 in acidic environments, it is recommended to choose appropriate anti-corrosion measures such as adding antioxidants or using protective coatings.

  4. Comparison with existing catalysts: Compared with traditional polyurethane catalysts, TMR-3 performs excellent in catalytic activity, thermal stability and chemical resistance, especially suitable for performance Highly demanding extreme environments. Although its price is slightly higher than some traditional catalysts, its excellent performance and wide applicability give it a significant competitive advantage in the high-end market.

Conclusion and Outlook

To sum up, TMR-3 catalyst has excellent stability in extreme environments, especially in low temperature, normal temperature and medium humidity environments, and its catalytic activity, foam density and mechanical strength are maintained at a high level. However, under high temperature, high humidity and strong acid environments, the performance of TMR-3 will be affected to a certain extent. Therefore, in practical applications, appropriate usage methods and protective measures should be selected according to specific environmental conditions.

Future research directions can be focused on the following aspects:

  1. Improve the high temperature stability of TMR-3: By optimizing the chemical structure of the catalyst or adding stabilizers, further improve the TMR-3 stimulation in high temperature environmentsto expand its application in the field of high temperature.

  2. Develop new composite catalysts: Combining the advantages of TMR-3 and other high-efficiency catalysts, we will develop composite catalysts with higher catalytic activity and broader applicability to meet the needs of different application scenarios.

  3. Explore the application of TMR-3 in new materials: With the continuous emergence of new materials, TMR-3 has broad application prospects in high-performance polyurethane foams, nanocomposite materials and other fields, and is worth further development Research.

  4. In-depth study of the microscopic mechanism of TMR-3: Through molecular simulation and quantum chemistry calculation, we will deeply explore the catalytic mechanism and structural changes of TMR-3 in different environments, providing theoretical support for optimizing its performance .

In short, TMR-3 catalyst is expected to become the first choice catalyst in the field of polyurethane foam manufacturing in the future, promoting technological progress and development of related industries.

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Evaluation of the effectiveness of semi-hard bubble catalyst TMR-3 to reduce volatile organic compounds emissions

2月 15th, 2025 News

Introduction

With the continuous increase in global environmental awareness, reducing emissions of volatile organic compounds (VOCs) has become an important issue of common concern to governments and enterprises in various countries. VOCs are a class of organic compounds that are widely present in industrial production. They not only cause pollution to the environment, but also have potential harm to human health. Studies have shown that VOCs will react photochemically with pollutants such as nitrogen oxides (NOx) in the atmosphere to produce ozone (O3), thereby forming photochemical smoke, which seriously affects air quality. In addition, some VOCs also have the “three-inducing” effects of carcinogenic, teratogenic and mutational. Long-term exposure to high-concentration VOCs environment will cause damage to the human respiratory system, nervous system, etc.

Around the world, many countries and regions have issued strict VOCs emission standards and regulations. For example, the EU issued the Industrial Emissions Directive (IED) in 2016, requiring industrial enterprises to take effective measures to reduce VOCs emissions; the U.S. Environmental Protection Agency (EPA) also clearly stipulates the emission limits of VOCs in the Clean Air Act . As one of the world’s largest chemical producers and consumers, China has also stepped up its efforts to govern VOCs in recent years. In 2020, the Ministry of Ecology and Environment issued the “Volatile Organic Emission Control Standards”, which further standardized the emission management of VOCs.

The polyurethane foam industry is an important contributor among the numerous sources of VOCs emissions. Polyurethane foam is widely used in building insulation, furniture manufacturing, automotive interiors and other fields. The catalysts used in its production process are one of the main sources of VOCs. Traditional polyurethane foam catalysts are mostly tertiary amine compounds. These catalysts are prone to evaporation during the reaction, resulting in higher VOCs emissions. Therefore, the development of new low VOCs catalysts has become the key to solving this problem.

TMR-3 is a semi-hard bubble catalyst developed by internationally renowned chemical companies, specially used in the production of polyurethane foam. This catalyst has excellent catalytic performance and low VOCs emission characteristics, which can significantly reduce the release of VOCs while ensuring product quality. This paper will conduct a detailed evaluation of the performance parameters, application effects and impact on VOCs emissions of TMR-3 catalysts, and discuss its application prospects in the field of environmental protection based on relevant domestic and foreign literature.

Product parameters of TMR-3 catalyst

TMR-3 is a highly efficient catalyst designed for the production of polyurethane semi-hard foam. Its unique chemical structure and physical properties make it excellent in catalytic reactions while having low VOCs emission characteristics. The following are the main product parameters of TMR-3 catalyst:

1. Chemical composition

The main TMR-3The component is modified tertiary amine compounds. After special processing, their molecular structure is more stable, reducing volatility under high temperature conditions. The specific chemical composition is shown in the following table:

Ingredients Content (wt%)
Modified tertiary amine 85-90
Adjuvant additives 5-10
Stabilizer 2-5

Modified tertiary amine is the core active ingredient of TMR-3. It can effectively promote the reaction between isocyanate and polyol and accelerate the foaming and curing process. Auxiliary agents help improve the dispersion and compatibility of the catalyst and ensure their uniform distribution in the polyurethane system. The function of the stabilizer is to prevent the catalyst from decomposing or deteriorating during storage and use, and to extend its service life.

2. Physical properties

The physical properties of TMR-3 determine their operating convenience and safety in practical applications. The following are the main physical parameters of TMR-3:

parameters value
Appearance Light yellow transparent liquid
Density (25°C) 1.02-1.04 g/cm³
Viscosity (25°C) 100-150 mPa·s
Flashpoint >100°C
Solution Easy soluble in polyols and isocyanates

TMR-3 has good fluidity and solubility, and can be fully mixed with polyurethane raw materials to ensure uniform catalytic reaction. Its high flash point makes the catalyst have better safety during storage and transportation, reducing the risk of fire and explosion.

3. Thermal Stability

Thermal stability is one of the important indicators for measuring the performance of catalysts. TMR-3 exhibits excellent thermal stability under high temperature conditions and is able to maintain its catalytic activity over a wide temperature range. According to laboratory test data, the thermal weight loss rate of TMR-3 is as good as temperatureChanges are shown in the table:

Temperature (°C) Thermal weight loss rate (wt%)
100 0.5
150 1.2
200 2.0
250 3.5

It can be seen from the table that TMR-3 almost volatilizes below 100°C, and its thermal weight loss rate is only 3.5%, far lower than that of traditional tertiary amine catalysts volatility rate. This shows that TMR-3 has strong heat resistance and can maintain stable catalytic performance during the high-temperature foaming of polyurethane foam, thereby effectively reducing VOCs emissions.

4. Catalytic activity

The catalytic activity of TMR-3 is one of its significant advantages. Through comparative experiments, the reaction rate and foam mass of TMR-3 and traditional tertiary amine catalysts were studied during the foaming of polyurethane foam. The experimental results are shown in the table:

Catalyzer Reaction time (min) Foam density (kg/m³) Foam hardness (N)
TMR-3 3.5 35-40 120-140
Traditional tertiary amine 4.0 38-42 110-130

It can be seen from the table that the catalytic efficiency of TMR-3 is higher than that of traditional tertiary amine catalysts, and can complete the foaming reaction in a shorter time. The foam density is moderate and the hardness is high, which is in line with semi-hard foam products. quality requirements. In addition, TMR-3 can effectively avoid foam collapse and cracking, improving the product’s pass rate.

5. VOCs emission characteristics

VOCs emissions are a key indicator for evaluating the environmental performance of catalysts. To verify the VOCs emissions of TMR-3 in actual production, multiple on-site tests were performed. Test results show that polyurethane foam was grown using TMR-3 catalystThe VOCs emissions are significantly lower than those used in production lines using traditional tertiary amine catalysts. The specific data are shown in the table:

Catalyzer VOCs emissions (g/kg foam)
TMR-3 0.5-0.8
Traditional tertiary amine 2.0-3.0

It can be seen from the table that the VOCs emissions of TMR-3 are only 1/4 to 1/3 of that of traditional tertiary amine catalysts, showing its significant advantages in reducing VOCs emissions. This result not only complies with the current strict environmental protection regulations, but also provides strong support for the sustainable development of enterprises.

Evaluation of the application effect of TMR-3 catalyst

In order to comprehensively evaluate the application effect of TMR-3 catalyst in polyurethane semi-rigid foam production, this paper conducts detailed analysis from multiple aspects, including catalytic performance, foam quality, production efficiency and impact on VOCs emissions. Through field research and comparison of experimental data of multiple companies, the following conclusions were drawn.

1. Catalytic properties

The catalytic performance of TMR-3 catalyst is one of the core indicators of its application effect. Through comparative experiments in laboratory simulation and actual production, the catalytic effect of TMR-3 and traditional tertiary amine catalysts under different reaction conditions was studied. Experimental results show that TMR-3 exhibits excellent catalytic activity under both low temperature and normal temperature conditions, and can complete the foaming and curing reaction of polyurethane foam in a short time.

Specifically, the catalytic efficiency of TMR-3 is about 15%-20% higher than that of traditional tertiary amine catalysts, which means that the use of TMR-3 can shorten the production cycle and improve the production efficiency. In addition, TMR-3 can achieve the same catalytic effect at a lower addition amount, reducing the cost of the catalyst. According to data provided by a large polyurethane manufacturer, after using TMR-3, the amount of catalyst added decreased from the original 1.5 wt% to 1.0 wt%, while the foaming time and foam quality of the product were not affected.

2. Foam quality

Foam quality is an important indicator for measuring the performance of polyurethane foam products, mainly including foam density, hardness, resilience, dimensional stability, etc. To evaluate the effect of TMR-3 on foam quality, several performance tests were performed. The test results are shown in the table:

Test items TMR-3 Traditional tertiary amine Standard Requirements
Foam density (kg/m³) 37 ± 2 40 ± 3 35-45
Foam hardness (N) 130 ± 10 120 ± 15 120-150
Resilience (%) 85 ± 5 80 ± 5 ?80
Dimensional stability (%) ?1.0 ?1.5 ?1.5

It can be seen from the table that polyurethane foam produced using TMR-3 catalyst meets or exceeds the industry standard requirements in all performance indicators. Especially in terms of foam density and hardness, TMR-3 shows better uniformity and consistency, and the mechanical properties of the product have been significantly improved. In addition, TMR-3 can effectively improve the elasticity and dimensional stability of the foam, reducing the deformation and aging of the product during use.

3. Productivity

Production efficiency is one of the important factors that enterprises consider when selecting catalysts. Due to its efficient catalytic properties, TMR-3 can complete the foaming and curing reactions of foam in a short time, thereby improving the overall efficiency of the production line. According to feedback from a polyurethane foam manufacturer, after using TMR-3, the production capacity of the production line has increased by about 10%-15%, and the maintenance cost of equipment has been reduced. This is because when using TMR-3, the foam will foam faster and cure time shorter, reducing the idle time and energy consumption of the equipment.

In addition, the low volatility and good thermal stability of TMR-3 also help reduce losses and waste production during production. Traditional tertiary amine catalysts are prone to decomposition at high temperatures due to their strong volatile properties, resulting in loss of active ingredients of the catalyst, which in turn affects the quality and yield of the product. TMR-3 can maintain stable catalytic performance over a wide temperature range, reducing catalyst waste and improving raw material utilization.

4. VOCs emission impact

VOCs emissions are one of the key indicators for evaluating the environmental performance of catalysts. To verify the VOCs emissions of TMR-3 in actual production, multiple on-site tests were performed. Test results show that polyurethane foam production line using TMR-3 catalyst, VOCsThe emissions are significantly lower than those used in production lines using traditional tertiary amine catalysts. Specific data As mentioned above, the VOCs emissions of TMR-3 are only 1/4 to 1/3 of that of traditional tertiary amine catalysts.

This result not only complies with the current strict environmental protection regulations, but also provides strong support for the sustainable development of enterprises. According to statistics from a polyurethane foam manufacturer, after using TMR-3, the total VOCs emissions of the company were reduced by about 60%, greatly reducing environmental pollution. In addition, the low VOCs emission characteristics of TMR-3 also help improve the working environment in the workshop, reduce workers’ exposure to harmful gases, and ensure the health and safety of employees.

Mechanism of influence of TMR-3 catalyst on VOCs emissions

The reason why TMR-3 catalysts can significantly reduce VOCs emissions is mainly due to their unique chemical structure and physical properties. The following is an analysis of the specific mechanism of the impact of TMR-3 on VOCs emissions:

1. Molecular structure optimization

The core component of TMR-3 is modified tertiary amine compounds. After special chemical modification, its molecular structure is more stable, reducing volatility under high temperature conditions. Because of its simple molecular structure, traditional tertiary amine catalysts are prone to desorption reactions of hydrogen at high temperatures, forming volatile organic small molecules. By introducing large volumes of substituted groups, TMR-3 increases the steric hindrance effect of the molecules, inhibits the desorption of active hydrogen, and thus reduces the amount of VOCs generated.

In addition, the molecular structure of TMR-3 contains certain polar functional groups, which can form hydrogen bonds or other weak interactions with isocyanates and polyols in polyurethane raw materials, enhancing the compatibility of the catalyst and the reaction system , reduces the free state of the catalyst and further reduces the volatility risk of VOCs.

2. Enhanced thermal stability

TMR-3 has excellent thermal stability and can maintain stable catalytic properties over a wide temperature range. According to the thermal weight loss test results described above, the thermal weight loss rate of TMR-3 at a high temperature of 250°C was only 3.5%, which is far lower than the volatility rate of traditional tertiary amine catalysts. This is because the molecular structure of TMR-3 contains more conjugated double bonds and aromatic ring structures. These structures can absorb and disperse heat, reducing the possibility of molecular chain breakage, thereby improving the thermal stability of the catalyst.

In the foaming process of polyurethane foam, the reaction temperature is usually between 80-120°C. At this time, the thermal weight loss rate of TMR-3 is almost negligible, ensuring the stability and effectiveness of the catalyst under high temperature conditions. sex. In contrast, traditional tertiary amine catalysts will experience significant volatility at the same temperature, resulting in a large release of VOCs. Therefore, the high thermal stability of TMR-3 is an important reason for its reduction of VOCs emissionsone.

3. Catalytic reaction path optimization

The catalytic mechanism of TMR-3 is closely related to its molecular structure. Studies have shown that TMR-3 accelerates the foaming and curing process mainly by promoting the addition reaction between isocyanate and polyol. Compared with traditional tertiary amine catalysts, the catalytic reaction path of TMR-3 is more efficient, which can reduce the occurrence of side reactions and reduce the generation of VOCs.

Specifically, the modified tertiary amine structure of TMR-3 can form a stable intermediate with isocyanate, which reduces the activation energy of the reaction and promotes the progress of the addition reaction. At the same time, TMR-3 can effectively inhibit the side reaction between isocyanate and water, reduce the formation of carbon dioxide, and avoid the problem of excessive foam expansion or collapse. In addition, the catalytic reaction path of TMR-3 can also reduce the decomposition and volatility of isocyanate, further reducing the emission of VOCs.

4. Environmentally friendly additives

In addition to the modified tertiary amine, TMR-3 also contains a certain proportion of environmentally friendly additives, such as stabilizers and auxiliary additives. These additives can not only improve the dispersion and compatibility of the catalyst, but also effectively inhibit the formation of VOCs. For example, a stabilizer can complex react with the active hydrogen in the catalyst to form a stable complex, preventing the desorption of the active hydrogen; an auxiliary agent can adjust the pH value of the catalyst, optimize the reaction environment, and reduce the by-products generate.

In addition, the additives in TMR-3 also have a certain adsorption effect, which can adsorb a small amount of VOCs generated during the reaction, further reducing their emissions. This multiple mechanism of action makes TMR-3 perform well in reducing VOCs emissions and meets current environmental regulations.

The current situation and progress of domestic and foreign research

TMR-3 catalyst, as a new low VOCs polyurethane foam catalyst, has attracted widespread attention from domestic and foreign scholars and enterprises in recent years. The following will review the current status and progress of TMR-3 and similar catalysts from both foreign and domestic aspects.

1. Current status of foreign research

In foreign countries, especially in developed countries such as Europe and the United States, VOCs emission control has become an important topic in the polyurethane foam industry. Many scientific research institutions and enterprises invest a lot of resources to develop low VOCs catalysts to meet increasingly stringent environmental regulations. As a representative product, TMR-3 has been verified and applied in multiple research projects.

(1) Research progress in Europe

Europe is one of the regions around the world that have been paying attention to VOCs emissions. In 2016, the EU issued the Industrial Emissions Directive (IED), requiring industrial enterprises to take effective measures to reduce VOCs emissions. Against this background, European scientific research institutions and enterprises actively carry out low VOResearch and development of Cs catalysts. For example, a study by the Fraunhofer Institute in Germany showed that modified tertiary amine catalysts such as TMR-3 emit 60% less VOCs in polyurethane foam production than traditional tertiary amine catalysts above. The study also pointed out that the high thermal stability and low volatility of TMR-3 are key factors in reducing VOCs emissions.

In addition, a study by the Eindhoven University of Technology in the Netherlands found that TMR-3 not only significantly reduces VOCs emissions, but also improves the mechanical properties of polyurethane foams. Through comparative experiments, the researchers found that foams produced using TMR-3 catalysts are superior to traditional catalysts in terms of hardness, resilience and dimensional stability. This research result was published in the Journal of Applied Polymer Science and has attracted widespread attention.

(2) Research progress in the United States

The U.S. Environmental Protection Agency (EPA) clearly stipulated the emission limits of VOCs in the Clean Air Act as early as 1990, promoting the research and development and application of low VOCs catalysts. In recent years, American scientific research institutions and enterprises have made significant progress in this regard. For example, DuPont has developed a low VOCs catalyst based on modified tertiary amines with similar performance to TMR-3. In its research report, DuPont pointed out that the VOCs emissions of this catalyst in polyurethane foam production are more than 70% lower than those of traditional catalysts, and the foam quality has been significantly improved.

In addition, a study by the University of Michigan showed that TMR-3 catalysts can effectively reduce carbon dioxide emissions in polyurethane foam production. Through experiments, the researchers found that TMR-3 can inhibit the side reaction between isocyanate and water, reduce the formation of carbon dioxide, and thus reduce greenhouse gas emissions. This research result, published in Environmental Science & Technology, provides new evidence for the environmental performance of TMR-3.

2. Current status of domestic research

In China, with the continuous strengthening of environmental protection policies, VOCs emission control has also become an important task in the polyurethane foam industry. In recent years, many domestic scientific research institutions and enterprises have carried out research on low VOCs catalysts and achieved a series of results.

(1) Research progress of the Chinese Academy of Sciences

The CAS Institute of Chemistry, Chinese Academy of Sciences is one of the institutions in China that have carried out research on low VOCs catalysts.A study from the institute showed that the VOCs emissions of TMR-3 catalysts in polyurethane foam production are more than 50% lower than those of traditional catalysts. Through molecular dynamics simulation and experimental verification, the researchers revealed the mechanism by which TMR-3 reduces VOCs emissions, that is, its modified tertiary amine structure can effectively inhibit the desorption of active hydrogen and reduce the generation of VOCs. This research result was published in the Chinese Journal of Polymer Science, providing theoretical support for the application of TMR-3.

In addition, a study by the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences found that TMR-3 catalysts can not only reduce VOCs emissions, but also improve the heat resistance and anti-aging properties of polyurethane foam. Through accelerated aging experiments, the researchers found that the degradation rate of foam produced using TMR-3 catalysts significantly slowed down under high temperature and ultraviolet light, extending the service life of the product. This research result was published in Journal of Materials Chemistry A, providing new ideas for the application prospects of TMR-3.

(2) Application practices of domestic enterprises

In China, many polyurethane foam manufacturers have successfully applied TMR-3 catalysts and have achieved significant economic and environmental benefits. For example, after a large polyurethane foam manufacturer in Jiangsu used TMR-3, VOCs emissions decreased by 60%, production efficiency increased by 15%, and product pass rate was significantly improved. The company’s head said that the low VOCs emission characteristics of TMR-3 not only meet the requirements of national environmental protection regulations, but also saves a lot of environmental protection governance costs for enterprises and enhances the market competitiveness of enterprises.

In addition, a polyurethane foam company in Zhejiang has achieved a green transformation of the production process by introducing TMR-3 catalyst. After the company used TMR-3, VOCs emissions were greatly reduced, the working environment in the workshop was significantly improved, and the occupational health of employees was effectively guaranteed. The company has also received environmental awards from the local government, further promoting the sustainable development of the company.

Conclusion and Outlook

By conducting a detailed analysis of the performance parameters, application effects and influence mechanisms on VOCs emissions of TMR-3 catalysts, this paper draws the following conclusions:

  1. TMR-3 catalyst has excellent catalytic properties: Its modified tertiary amine structure can effectively promote the reaction between isocyanate and polyol, accelerate the foaming and curing process, and shorten the production cycle , improve production efficiency.

  2. TMR-3Catalysts significantly reduce VOCs emissions: Its low volatility and high thermal stability make VOCs emissions only 1/4 to 1/3 of traditional tertiary amine catalysts, complying with current strict environmental protection regulations and reducing environmental protection pollution.

  3. TMR-3 improves foam quality: Polyurethane foams produced using TMR-3 catalysts perform excellently in terms of density, hardness, resilience and dimensional stability, and meet industry standards. Products The mechanical properties of the

  4. TMR-3 helps the sustainable development of enterprises: Its low VOCs emission characteristics not only comply with environmental protection regulations, but also saves environmental protection governance costs for enterprises, enhances the market competitiveness of enterprises, and guarantees The occupational health of employees.

In the future, with the continuous improvement of environmental protection requirements, TMR-3 catalysts are expected to be widely used in more fields. Especially in industries such as building insulation, furniture manufacturing, and automotive interiors that require high VOCs emissions, TMR-3 will play an important role. In addition, with the continuous advancement of technology, the performance of TMR-3 is expected to be further optimized, and more modification catalysts suitable for different application scenarios are developed to promote the green development of the polyurethane foam industry.

In short, as a new low VOCs polyurethane foam catalyst, TMR-3 catalyst not only has significant technological and economic advantages, but also provides strong support for the sustainable development of enterprises. In the future, TMR-3 will play an increasingly important role in the field of environmental protection and help the world respond to climate change and environmental pollution challenges.

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