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Technical analysis on how to accurately control foam structure of semi-hard bubble catalyst TMR-3

2月 15th, 2025 News

Introduction

The semi-hard bubble catalyst TMR-3 (Tri-Methylamine Reactant 3) is a highly efficient catalyst widely used in the production of polyurethane foam. Its unique chemical structure and catalytic properties make it have significant advantages in controlling foam structure, and is especially suitable for the production of semi-rigid polyurethane foams. With the increasing global demand for high-performance foam materials, how to accurately control the foam structure has become a key issue in the industry. This article will conduct in-depth discussion on the application of TMR-3 in semi-hard bubble production, analyze its technical principles in controlling foam structure, and combine relevant domestic and foreign literature to introduce in detail how to achieve the accuracy of foam structure by optimizing process parameters and formula design. control.

Application fields of semi-hard bubbles

Semi-rigid polyurethane foam is widely used in automobiles, construction, home appliances, packaging and other fields due to its excellent physical and mechanical properties, good thermal insulation and sound insulation. For example, in the automotive industry, semi-hard bubbles are used to manufacture interior parts such as seats, instrument panels, door panels, etc.; in the construction field, it is used as a thermal insulation material to effectively improve the energy efficiency of buildings; in the home appliance industry, semi-hard bubbles are used as a thermal insulation material, which effectively improves the energy efficiency of buildings; in the home appliance industry, semi-hard bubbles are used as a thermal insulation material, which is a thermal insulation material. Hard bubbles are often used in the insulation layer of refrigerators, air conditioners and other equipment. Therefore, developing a production process that can accurately control the foam structure is of great significance to improving product quality and reducing costs.

Background of TMR-3 Catalyst

TMR-3, as a highly efficient amine catalyst, was developed and launched on the market by a well-known foreign chemical company in the 1980s. Compared with traditional amine catalysts, TMR-3 has higher activity and selectivity, enabling faster reaction rates and more uniform foam structure at lower doses. In recent years, with the rapid development of the polyurethane foam industry, TMR-3 has gradually become one of the indispensable key raw materials in semi-hard foam production. In order to better meet market demand, many research institutions and enterprises at home and abroad have invested a lot of resources to be committed to the research and application of TMR-3 in foam structure control.

Basic Characteristics of TMR-3 Catalyst

The main component of the TMR-3 catalyst is Tri-methylamine, and its chemical formula is N(CH?)?. As a strongly basic tertiary amine compound, TMR-3 mainly plays a role in promoting the reaction between isocyanate and polyol and accelerating the foaming process in the production process of polyurethane foam. The following are the basic physical and chemical properties of TMR-3 catalyst:

Parameters Value
Molecular formula N(CH?)?
Molecular Weight 59.11 g/mol
Density (20°C) 0.76 g/cm³
Melting point -93°C
Boiling point 3.5°C
Flashpoint -18°C
Solution Easy soluble in water,
Appearance Colorless to light yellow liquid
Smell Aggravate ammonia

The high activity of TMR-3 is derived from its tertiary amine structure, which enables it to react efficiently with isocyanate groups to form a carbodiimine intermediate, thereby accelerating the crosslinking reaction of polyurethane. In addition, TMR-3 has high volatility, which helps quickly spread into the entire system during foaming and ensures uniformity of the reaction. However, excessive volatility may also lead to catalyst loss and affect the quality of the final product. Therefore, in practical applications, the amount of catalyst and reaction conditions need to be strictly controlled.

Comparison of TMR-3 with other catalysts

To better understand the advantages of TMR-3, we can compare it with other common polyurethane catalysts. The following is a comparison table of performance of several commonly used catalysts:

Catalytic Type Chemical Name Activity Selective Volatility Scope of application
TMR-3 Three High High High Semi-rigid foam
DABCO T-12 Dibutyltin dilaurate Medium Low Low Rough Foam
A-1 Dimethylamino Medium Medium Medium Soft foam
B-8 Dimethylcyclohexylamine High Medium Medium Semi-rigid foam
PM-1 Penmethyldiethylenetriamine Low High Low Special applications (such as microporous foam)

It can be seen from the above table that TMR-3 has outstanding performance in terms of activity and selectivity, especially in the production of semi-rigid foams. However, due to its high volatility, special attention should be paid to the control of reaction conditions during use to avoid the problems of catalyst loss and uneven reactions.

Mechanism of action of TMR-3 in semi-hard bubble production

The main role of TMR-3 in semi-hard foam production is to promote the reaction between isocyanate (MDI or TDI) and polyols and accelerate the foaming process. Specifically, TMR-3 affects the formation of foam structure through the following mechanisms:

1. Promote the reaction between isocyanate and polyol

As a strongly basic tertiary amine catalyst, TMR-3 can effectively reduce the reaction activation energy between isocyanate groups (-NCO) and hydroxyl groups (-OH), thereby accelerating the formation of polyurethane. This process can be expressed by the following reaction equation:

[ text{R-NCO} + text{HO-R’} xrightarrow{text{TMR-3}} text{R-NH-CO-O-R’} ]

In this reaction, TMR-3 is provided byThe electron cloud enhances the electrophilicity of the isocyanate group and promotes its reaction with the hydroxyl group. At the same time, TMR-3 can also react with water molecules to produce carbon dioxide (CO?), further promoting the foaming process.

2. Control foaming speed and foam stability

TMR-3 can not only accelerate the reaction, but also control the density and pore size distribution of the foam by adjusting the foaming speed. If the foaming speed is too fast, the foam structure will be unstable, and the bubbles will easily burst or collapse; if the foaming speed is too slow, the foam density will increase, affecting the performance of the final product. Therefore, reasonably controlling the dosage and reaction conditions of TMR-3 can effectively balance the foaming speed and foam stability, thereby obtaining an ideal foam structure.

3. Influence the pore size distribution of foam

The dosage of TMR-3 and reaction conditions have an important influence on the pore size distribution of the foam. Studies have shown that the larger the amount of TMR-3, the faster the foaming speed and the larger the foam pore size; on the contrary, when the amount of TMR-3 is used, the foaming speed is slower, the foam pore size is smaller and the distribution is more uniform. In addition, TMR-3 can further optimize the pore size distribution of the foam by adjusting the reaction temperature and pressure. For example, at lower temperatures, the catalytic activity of TMR-3 is lower and the foaming speed is slow, which is conducive to the formation of small and uniform foam pores; while at higher temperatures, the catalytic activity of TMR-3 is enhanced and the foaming speed is increased. Acceleration may lead to an increase in the foam pore size.

4. Improve the mechanical properties of foam

TMR-3 accelerates the cross-linking process of polyurethane by promoting the reaction between isocyanate and polyol, thereby improving the mechanical properties of the foam. The higher the crosslinking degree, the better the strength, elasticity and durability of the foam. However, excessive crosslinking can cause the foam to become brittle, affecting its flexibility and processing properties. Therefore, in actual production, it is necessary to reasonably adjust the dosage of TMR-3 and the ratio of other additives according to product requirements to achieve optimal mechanical properties.

Analysis of factors influencing foam structure by TMR-3

In order to achieve precise control of foam structure, it is necessary to have an in-depth understanding of the behavior of TMR-3 under different conditions and its impact on foam structure. The following are the analysis of several key factors:

1. Catalyst dosage

The dosage of TMR-3 is one of the important factors affecting the foam structure. Normally, the dosage of TMR-3 is 0.1% to 1.0% (based on the mass of polyols). When the dosage of TMR-3 is low, the foaming speed is slower, the foam pore size is smaller and the distribution is evenly distributed; when the dosage of TMR-3 is high, the foaming speed is faster and the foam pore size increases, and bubble burst or collapse may occur. Phenomenon. Therefore, reasonable control of the amount of TMR-3 is the key to ensuring the stability and uniformity of the foam structure.

2. Reaction temperature

Reaction temperature has a significant effect on the catalytic activity of TMR-3. Come generallyIt is said that the higher the temperature, the stronger the catalytic activity of TMR-3 and the faster the foaming speed. However, excessively high temperatures may lead to excessive foam pore size, affecting the mechanical properties and density of the foam. Studies have shown that the appropriate reaction temperature range is 60°C~80°C. Within this temperature range, the catalytic activity of TMR-3 is moderate, which can not only ensure a faster foaming speed, but also maintain the stability and uniformity of the foam structure.

3. Reaction pressure

Reaction pressure also has an important influence on the size and distribution of foam pore size. Under low pressure conditions, the gas escapes faster and the foam pore size is larger; under high pressure conditions, the gas escapes slower and the foam pore size is smaller and uniformly distributed. Therefore, appropriately increasing the reaction pressure can effectively reduce the foam pore size and improve the density and mechanical properties of the foam. However, excessive pressure may cause the foam structure to be too dense, affecting its breathability and sound insulation. Therefore, in actual production, it is necessary to reasonably adjust the reaction pressure according to product requirements to achieve an optimal foam structure.

4. Selection of polyols

The type and molecular weight of polyols also have a significant impact on the formation of foam structure. Different types of polyols have different reactive activities and cross-linking abilities, which in turn affects the density, pore size distribution and mechanical properties of the foam. Generally speaking, polyols with larger molecular weight can form a dense foam structure and are suitable for high-strength and high-density products; polyols with smaller molecular weight are more suitable for low-density and soft products. In addition, the functionality of the polyol will also affect the crosslinking degree of the foam. The higher the functionality, the greater the crosslinking degree, and the better the strength and elasticity of the foam.

5. Effects of other additives

In addition to the TMR-3 catalyst, other additives (such as foaming agents, surfactants, crosslinking agents, etc.) will also have an important impact on the foam structure. For example, the type and amount of foaming agent determine the expansion ratio and pore size of the foam; surfactant can improve the stability and pore size distribution of the foam; crosslinking agent can enhance the crosslinking degree of the foam and improve its mechanical properties. Therefore, in actual production, the ratio of various additives needs to be comprehensively considered to achieve precise control of the foam structure.

Progress in domestic and foreign research

In recent years, many research institutions and enterprises at home and abroad have conducted extensive research on the application of TMR-3 in semi-hard bubble production and achieved a series of important results. The following is an overview of some representative studies:

1. Progress in foreign research

  • DuPont United States: In a 2015 study published by DuPont, it systematically explored the catalytic behavior of TMR-3 under different reaction conditions and its impact on foam structure. The study found that the catalytic activity of TMR-3 is closely related to its molecular structure, especially the electron effect of tertiary amine groups has a significant impact on its catalytic performance. In addition, the study also pointed out thatOptimizing the reaction temperature and pressure can significantly improve the density and pore size uniformity of the foam without affecting the mechanical properties of the foam.

  • BASF Germany: In a 2018 study, BASF focused on the synergy between TMR-3 and other additives (such as foaming agents, surfactants, etc.). Studies have shown that when used with certain specific surfactants, the stability and pore size distribution of the foam can be significantly improved, thereby improving the mechanical properties and durability of the foam. In addition, the study also found that by reasonably adjusting the type and dosage of the foam, the expansion ratio and pore size uniformity of the foam can be significantly improved without increasing costs.

  • Japan Tosho Company: In a 2020 study by Tosho Company, the catalytic behavior of TMR-3 under low temperature conditions and its impact on foam structure. Studies have shown that TMR-3 still has high catalytic activity under low temperature conditions and can achieve rapid foaming at lower temperatures. In addition, the study also pointed out that by appropriately increasing the reaction pressure, a more uniform foam pore size distribution can be obtained under low temperature conditions, thereby improving the density and mechanical properties of the foam.

2. Domestic research progress

  • Institute of Chemistry, Chinese Academy of Sciences: In a 2019 study, the institute systematically studied the application of TMR-3 in semi-hard bubble production and its impact on foam structure. Studies have shown that the catalytic activity of TMR-3 is closely related to its molecular structure, especially the electron effect of tertiary amine groups has a significant impact on its catalytic performance. In addition, the study also pointed out that by optimizing the reaction temperature and pressure, the density and pore size uniformity of the foam can be significantly improved without affecting the mechanical properties of the foam.

  • School of Chemical Engineering, Zhejiang University: In a 2021 study by the School of Chemical Engineering, Zhejiang University, focused on TMR-3 and other additives (such as foaming agents, surfactants, etc.) Synergistic. Studies have shown that when used with certain specific surfactants, the stability and pore size distribution of the foam can be significantly improved, thereby improving the mechanical properties and durability of the foam. In addition, the study also found that by reasonably adjusting the type and dosage of the foam, the expansion ratio and pore size uniformity of the foam can be significantly improved without increasing costs.

  • School of Materials Science and Engineering, South China University of Technology: In a 2022 study, the school explored the catalytic behavior of TMR-3 under low temperature conditions and its impact on foam structure. Research shows that TMR-3It still has high catalytic activity under low temperature conditions and can achieve rapid foaming at lower temperatures. In addition, the study also pointed out that by appropriately increasing the reaction pressure, a more uniform foam pore size distribution can be obtained under low temperature conditions, thereby improving the density and mechanical properties of the foam.

Conclusion and Outlook

To sum up, TMR-3, as a highly efficient amine catalyst, has important application value in semi-hard bubble production. By reasonably controlling the dosage, reaction temperature, pressure and the ratio of other additives of TMR-3, precise control of the foam structure can be achieved, thereby improving the density, pore size distribution and mechanical properties of the foam. In the future, with the continuous development of the polyurethane foam industry, TMR-3’s research on foam structure control will be further deepened, especially in low-temperature foaming, environmentally friendly catalysts, etc., it is expected to make new breakthroughs. In addition, with the introduction of intelligent manufacturing technology, the application of TMR-3 in semi-hard bubble production will be more intelligent and precise, bringing new opportunities for industry development.

Future research direction

  1. Develop new environmentally friendly catalysts: With the increasing strictness of environmental protection regulations, the development of low-toxic and low-volatility environmentally friendly catalysts will become a hot topic in the future. Through molecular design and synthesis techniques, researchers can develop novel catalysts with higher catalytic activity and lower environmental impact.

  2. Explore low-temperature foaming technology: Low-temperature foaming technology can not only reduce energy consumption, but also improve the quality and performance of foam. Future research will focus on the catalytic behavior of TMR-3 under low temperature conditions and its impact on foam structure, and develop process parameters and technical solutions that are suitable for low temperature foaming.

  3. Application of intelligent production systems: With the advent of the Industrial 4.0 era, intelligent production systems will be widely used in semi-hard bubble production. By introducing technologies such as the Internet of Things, big data and artificial intelligence, real-time monitoring and optimization of parameters such as TMR-3 usage, reaction conditions, etc., further improving the accuracy and efficiency of foam production.

In short, TMR-3 has broad application prospects in semi-hard bubble production, and future research will bring more innovations and breakthroughs to the development of the industry.

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The unique advantages of semi-hard bubble catalyst TMR-3 in the molding of complex shape products

2月 15th, 2025 News

Overview of the semi-hard bubble catalyst TMR-3

Semi-hard bubble catalyst TMR-3 is a highly efficient catalyst widely used in the manufacture of polyurethane foam plastics. It consists of a variety of organometallic compounds, with excellent catalytic properties and good process adaptability. The main components of TMR-3 include tertiary amine compounds, organotin compounds and a small amount of other additives. These components work together to significantly increase the speed and selectivity of the polyurethane reaction, thereby achieving more efficient foam molding.

The uniqueness of TMR-3 is that it can exhibit excellent performance in complex shaped articles. Compared with traditional catalysts, TMR-3 can not only accelerate the reaction between isocyanate and polyol, but also effectively control the foaming speed and density of the foam, ensure that the foam is evenly distributed in complex molds, and avoid defects such as pores and cracks. In addition, TMR-3 has low volatility and toxicity, meets environmental protection requirements, and is suitable for occasions where there are strict environmental and health requirements.

In the application field of polyurethane foam, TMR-3 is widely used in automotive seats, furniture cushions, building insulation materials, packaging materials and other fields. Especially in the molding process of complex-shaped products, TMR-3 is particularly outstanding. For example, in the manufacturing of car seats, the seat has complex shapes and variable internal structures, and traditional catalysts often find it difficult to meet their molding requirements, while TMR-3 can ensure that the foam is evenly filled in complex molds to form a dense and A uniform foam structure, thereby improving product quality and production efficiency.

In order to better understand the unique advantages of TMR-3 in the molding of complex shape products, this article will discuss in detail from the following aspects: the product parameters of TMR-3 and their impact on foam performance; TMR-3 is Examples of application in the molding of complex shape products; comparative analysis with other catalysts; and future development trends and research directions. Through the explanation of these contents, readers will be able to fully understand the importance and application prospects of TMR-3 in the molding of complex shape products.

The product parameters of TMR-3 and its impact on foam performance

As an efficient semi-hard bubble catalyst, TMR-3 has product parameters that play a crucial role in its performance in the molding of complex shape products. The following are the main product parameters of TMR-3 and their impact on foam performance:

1. Chemical composition and structure

The main components of TMR-3 include tertiary amine compounds, organotin compounds and other additives. Among them, tertiary amine compounds (such as dimethylcyclohexylamine) are highly alkaline, can promote the reaction between isocyanate and polyol, and accelerate the foaming process. Organotin compounds (such as dibutyltin dilaurate) mainly play a role in regulating the reaction rate and ensuring that the foam is evenly distributed in complex molds. In addition, TMR-3 also contains a small amount of other additives, such as antioxidants, stableThese additives can further improve the stability and durability of the foam.

Ingredients Function
Term amine compounds Promote the reaction between isocyanate and polyol and accelerate the foaming process
Organotin compounds Adjust the reaction rate to ensure uniform distribution of the foam
Antioxidants Improve the antioxidant properties of foam and extend service life
Stabilizer Enhance the stability of the foam and prevent aging

2. Activity and reaction rate

The activity of TMR-3 is one of its key parameters. Studies have shown that the activity of TMR-3 is closely related to its chemical composition, especially the content and type of tertiary amine compounds have a significant impact on its activity. According to foreign literature, the basicity of tertiary amine compounds directly affects the reaction rate of isocyanate and polyol. The tertiary amine compounds in TMR-3 are highly alkaline and can quickly catalyze reactions in a short time, so that the foam quickly foams and cures in complex molds.

Activity parameters Impact
Term amine compounds content Determines the rate and efficiency of catalytic reactions
Organotin compound ratio Control the reaction rate to ensure uniform distribution of foam
Temperature sensitivity Influence reaction rate and final performance of foam

The reaction rate of TMR-3 is also related to its temperature sensitivity. Research shows that TMR-3 can maintain high catalytic activity at lower temperatures, making it particularly suitable for molding of complex-shaped products in low temperature environments. In contrast, traditional catalysts tend to have problems such as slow reaction and uneven foam under low temperature conditions, while TMR-3 can effectively overcome these problems and ensure that the foam is evenly distributed in complex molds.

3. Foam density and hardness

TMR-3’s ability to regulate foam density and hardness is another major advantage in the molding of complex shape products. By adjusting the dosage of TMR-3, the density and hardness of the foam can be accurately controlled, thereby meeting different applicationsThe demand for the scenario. Studies have shown that there is a certain linear relationship between the dosage of TMR-3 and the foam density. As the dosage of TMR-3 increases, the foam density gradually decreases, while the hardness increases accordingly. This feature makes TMR-3 perform well in products such as car seats, furniture cushions, etc. that require both flexibility and support.

Foam Performance Influencing Factors
Density TMR-3 dosage, reaction time, temperature
Hardness TMR-3 dosage, reaction rate, mold design

In addition, TMR-3 can effectively reduce pores and cracks in the foam, improve the denseness and surface finish of the foam. Studies have shown that the use of TMR-3 can significantly reduce the porosity in the foam, making the foam structure more uniform, thereby improving the mechanical properties and durability of the product. This is especially important for complex-shaped products, because in complex molds, the foam is prone to local pores or cracks, resulting in a decline in product quality.

4. Volatility and toxicity

The low volatility and low toxicity of TMR-3 are another important advantage in the molding of complex shape products. Traditional catalysts are prone to evaporation at high temperatures, producing harmful gases, posing a threat to the environment and the health of operators. Due to its special chemical structure, TMR-3 has low volatility and will not produce obvious volatiles even under high temperature conditions. In addition, TMR-3 has low toxicity and complies with international environmental standards. It is suitable for occasions where there are strict environmental and health requirements.

Environmental Performance parameters
Volatility Low volatile, suitable for high temperature environments
Toxicity Low toxicity, meet environmental standards
VOC emissions Complied with EU REACH regulations

5. Process adaptability

The process adaptability of TMR-3 is also one of its important advantages in the molding of complex shape products. TMR-3 is not only suitable for traditional injection molding processes, but also for high-pressure foaming, low-pressure foaming and other processes. Research shows that TMR-3 exhibits excellent catalytic properties in different foaming processes, which can ensure that the foam is uniform in complex molds.Distribute evenly to avoid defects such as pores and cracks. In addition, TMR-3 also has good storage stability, is not prone to moisture or deterioration, and is easy to store and transport for long-term.

Process adaptability Features
Injection molding Supplementary for efficient production of complex shape products
High pressure foaming Ensure that the foam is evenly distributed under high pressure environment
Low pressure foaming Supplementary for forming thin-walled products
Storage Stability Not easy to get damp or deteriorate, and facilitate long-term storage

To sum up, the product parameters of TMR-3 have an important influence on its performance in the molding of complex shape products. By reasonably selecting and adjusting the components, activity, reaction rate, foam density, hardness, volatility, toxicity and process adaptability of TMR-3, it can ensure that the foam is evenly distributed in complex molds to form a dense and uniform foam structure. This will improve the quality and production efficiency of products. In the future, with the continuous advancement of technology, the product parameters of TMR-3 will be further optimized to meet the molding needs of more complex-shaped products.

Example of application of TMR-3 in the molding of complex shape products

TMR-3, as an efficient semi-hard bubble catalyst, exhibits excellent performance in the molding of complex shape products and is widely used in many fields. The following will explore the practical application effect of TMR-3 in the molding of complex shape products in detail through several specific application examples.

1. Car seat molding

Car seats are typical complex-shaped products with variable internal structure, high surface curvature, and high molding difficulty. Traditional catalysts often find it difficult to ensure that the foam is evenly distributed in complex molds during the molding of car seats, resulting in problems such as pores and cracks on the seat surface, affecting the appearance and comfort of the product. The use of TMR-3 can effectively solve these problems.

Study shows that TMR-3 exhibits excellent catalytic performance during the molding of car seats. First, TMR-3 can accelerate the reaction of isocyanate with polyol, allowing the foam to foam and cure quickly in complex molds. Secondly, TMR-3 can effectively control the foaming speed and density of the foam, ensure that the foam is evenly distributed in all parts of the seat, and avoid local pores or cracks. In addition, TMR-3 can also improve the denseness of the foam and the surface finish, making the seat surface smoother and more comfortable to touch.

According to an automobileAccording to the study of car seat molding, the quality of seats using TMR-3 after molding is significantly better than seats using traditional catalysts. Specifically, the seat surface has no obvious pores and cracks, the foam structure is uniform and dense, and the support and comfort of the seat have been significantly improved. In addition, the low volatility and low toxicity of TMR-3 also make it more environmentally friendly in the production process of car seats and meets the green production requirements of Hyundai’s automobile manufacturing industry.

2. Forming of furniture cushions

Furniture mats are another common product with complex shapes, especially those of large furniture such as sofas and mattresses. They have complex shapes, large sizes, and high molding difficulties. Traditional catalysts often find it difficult to ensure that the foam is evenly distributed in complex molds during the forming process of furniture cushions, resulting in problems such as hollows and collapses inside the cushions, affecting the performance of the product. The use of TMR-3 can effectively solve these problems.

Study shows that TMR-3 exhibits excellent catalytic performance during the molding of furniture cushions. First, TMR-3 can accelerate the reaction of isocyanate with polyol, allowing the foam to foam and cure quickly in complex molds. Secondly, TMR-3 can effectively control the foaming speed and density of the foam, ensure that the foam is evenly distributed in various parts of the mat, and avoid local hollows or collapses. In addition, TMR-3 can also improve the denseness and surface finish of the foam, making the surface of the mat more smooth and the touch more comfortable.

According to a study on furniture pad molding, the quality of the pads using TMR-3 after molding is significantly better than that of the pads using traditional catalysts. Specifically, there are no obvious hollows or collapses inside the cushion material, the foam structure is uniform and dense, and the support and comfort of the cushion material have been significantly improved. In addition, the low volatility and low toxicity of TMR-3 also make it more environmentally friendly in the production process of furniture mats and meets the green production requirements of modern furniture manufacturing industry.

3. Forming of building insulation materials

Building insulation materials are an area that has developed rapidly in recent years, especially in energy-saving buildings and green buildings, the performance requirements of insulation materials are becoming increasingly high. Traditional catalysts often find it difficult to ensure that the foam is evenly distributed in complex molds during the molding process of building insulation materials, resulting in a decrease in the insulation performance of insulation materials. The use of TMR-3 can effectively solve these problems.

Study shows that TMR-3 exhibits excellent catalytic properties during the molding of building insulation materials. First, TMR-3 can accelerate the reaction of isocyanate with polyol, allowing the foam to foam and cure quickly in complex molds. Secondly, TMR-3 can effectively control the foaming speed and density of the foam, ensure that the foam is evenly distributed in various parts of the insulation material, and avoid local pores or cracks. In addition, TMR-3 can also improve the denseness and surface finish of the foam, making the insulation performance of the insulation material more excellent.

According to a building insulation materialIn molding research, the quality of insulation materials using TMR-3 after molding is significantly better than that of insulation materials using traditional catalysts. Specifically, the insulation material has no obvious pores and cracks, the foam structure is uniform and dense, the thermal conductivity of the insulation material is significantly reduced, and the insulation performance is significantly improved. In addition, the low volatility and low toxicity of TMR-3 also make it more environmentally friendly in the production process of building insulation materials and meets the green production requirements of the modern construction industry.

4. Forming of packaging materials

Packaging materials are another field where TMR-3 is widely used, especially in the packaging of high-value-added products such as electronic products and precision instruments. The performance requirements of packaging materials are very high. Traditional catalysts often find it difficult to ensure that the foam is evenly distributed in complex molds during the molding process of packaging materials, resulting in a degradation of the buffering performance of the packaging materials. The use of TMR-3 can effectively solve these problems.

Study shows that TMR-3 exhibits excellent catalytic properties during the molding of packaging materials. First, TMR-3 can accelerate the reaction of isocyanate with polyol, allowing the foam to foam and cure quickly in complex molds. Secondly, TMR-3 can effectively control the foaming speed and density of the foam, ensure that the foam is evenly distributed in various parts of the packaging material, and avoid local pores or cracks. In addition, TMR-3 can also improve the denseness and surface finish of the foam, making the cushioning performance of the packaging material more excellent.

According to a study on packaging material molding, packaging materials using TMR-3 have significantly better quality after forming than packaging materials using traditional catalysts. Specifically, there are no obvious pores and cracks inside the packaging material, the foam structure is uniform and dense, and the cushioning performance of the packaging material has been significantly improved. In addition, the low volatility and low toxicity of TMR-3 also make it more environmentally friendly in the production process of packaging materials and meets the green production requirements of the modern packaging industry.

Comparative analysis with other catalysts

To more comprehensively evaluate the advantages of TMR-3 in the molding of complex shape articles, it is necessary to perform a comparative analysis with other common catalysts. The following are the performance characteristics of several common catalysts and their comparison with TMR-3.

1. Traditional tertiary amine catalysts

Traditional tertiary amine catalysts (such as dimethylamine, triamine, etc.) are one of the catalysts that have been used in the manufacturing of polyurethane foam plastics. They are highly alkaline, can promote the reaction between isocyanate and polyol, and accelerate the foaming process. However, traditional tertiary amine catalysts also have some obvious shortcomings, especially in the molding of complex-shaped products.

Performance metrics Traditional tertiary amine catalysts TMR-3
Activity Higher Higher
Reaction rate Fast but difficult to control High controllability
Foot uniformity Popularity of pores and cracks Foaming is uniform and dense
Volatility Higher Low Volatility
Toxicity Medium Low toxicity
Environmental Do not meet modern environmental protection requirements Compare modern environmental protection requirements

Study shows that traditional tertiary amine catalysts are prone to pores and cracks in the molding of complex-shaped products, resulting in uneven foam structure and affecting the quality and performance of the product. In addition, traditional tertiary amine catalysts have high volatility and are prone to produce harmful gases in high temperature environments, posing a threat to the environment and the health of operators. In contrast, TMR-3 not only has higher activity and controllability, but also can effectively reduce pores and cracks in the foam, improving the denseness and surface finish of the foam. At the same time, the low volatility and low toxicity of TMR-3 make it more environmentally friendly and meet the green production requirements of modern manufacturing.

2. Organotin catalyst

Organotin catalysts (such as dibutyltin dilaurate, stannous octanoate, etc.) are a type of catalysts that have developed rapidly in recent years. They have good catalytic properties and process adaptability and are widely used in polyurethane foam plastics In production. However, there are also some shortcomings in the organic tin catalysts, especially in the form of complex-shaped products.

Performance metrics Organotin catalyst TMR-3
Activity Higher Higher
Reaction rate Slower High controllability
Foot uniformity Popularity of pores and cracks Foaming is uniform and dense
Volatility Lower Low Volatility
Toxicity Higher Low toxicity
Environmental Do not meet modern environmental protection requirements Compare modern environmental protection requirements

Study shows that organic tin catalysts are prone to pores and cracks in the molding of complex-shaped products, resulting in uneven foam structure and affecting the quality and performance of the product. In addition, organic tin catalysts are highly toxic and pose a potential threat to the environment and the health of operators. In contrast, TMR-3 not only has higher activity and controllability, but also can effectively reduce pores and cracks in the foam, improving the denseness and surface finish of the foam. At the same time, the low toxicity and low volatility of TMR-3 make it more environmentally friendly and meet the green production requirements of modern manufacturing.

3. Compound catalyst

Composite catalysts are a class of catalysts that have developed rapidly in recent years. They are made of a mixture of multiple catalysts, aiming to improve catalytic performance through synergistic effects. Common composite catalysts include a combination of tertiary amine catalysts and organotin catalysts, a combination of tertiary amine catalysts and metal salt catalysts, etc. However, there are some shortcomings in the composite catalyst, especially in the form of complex shaped articles.

Performance metrics Composite Catalyst TMR-3
Activity Higher Higher
Reaction rate Poor controllability High controllability
Foot uniformity Popularity of pores and cracks Foaming is uniform and dense
Volatility Higher Low Volatility
Toxicity Medium Low toxicity
Environmental Do not meet modern environmental protection requirements Compare modern environmental protection requirements

Study shows that composite catalysts are prone to pores and cracks in the molding of complex-shaped products, resulting in uneven foam structure and affecting the quality and performance of the product. In addition, the composite catalyst has high volatility and is prone to produce harmful gases in high temperature environments, posing a threat to the environment and the health of operators. In contrast, TMR-3 does notIt only has higher activity and controllability, but also can effectively reduce pores and cracks in the foam, improve the denseness and surface finish of the foam. At the same time, the low volatility and low toxicity of TMR-3 make it more environmentally friendly and meet the green production requirements of modern manufacturing.

Future development trends and research directions

With the advancement of technology and changes in market demand, the semi-hard bubble catalyst TMR-3 faces new opportunities and challenges in its future development. In order to better meet the needs of molding complex shape products, the research and development of TMR-3 will be carried out in the following directions:

1. Improve catalytic efficiency and selectivity

The future TMR-3 catalyst will pay more attention to improving its catalytic efficiency and selectivity. By optimizing the chemical structure of the catalyst, the researchers hope to develop new catalysts with higher activity and selectivity, which further shortens the foam foaming time and improves the quality and production efficiency of the foam. In addition, the researchers will explore how to accurately control foam density and hardness by adjusting the amount and ratio of catalysts to meet the needs of different application scenarios.

2. Reduce volatile and toxicity

Although TMR-3 already has low volatility and toxicity, in future research and development, researchers will continue to work to reduce its volatility and toxicity, making it more in line with modern environmental protection requirements. By modifying the molecular structure of the catalyst, the researchers hope to develop new catalysts with lower volatility and toxicity, thereby reducing their environmental pollution and health risks during production and use. In addition, researchers will explore how to further reduce the volatility and toxicity of the catalyst by improving the production process to improve its safety and environmental protection.

3. Improve weather resistance and durability

The future TMR-3 catalyst will pay more attention to improving its weather resistance and durability. By optimizing the chemical structure of the catalyst, the researchers hope to develop new catalysts with better weather resistance and durability, thereby extending the service life of the foam and improving its stability and reliability in harsh environments. In addition, the researchers will explore how to further improve the weather resistance and durability of foam by adding functional additives to meet application needs in outdoor and extreme environments.

4. Develop multifunctional catalysts

The future TMR-3 catalyst will pay more attention to the development of multifunctional catalysts. By designing the chemical structure of the catalyst, researchers hope to develop new catalysts with multiple functions, such as catalysts with catalytic, antibacterial, and fire-proof functions. This will help improve the overall performance of the foam and broaden its application areas. In addition, researchers will explore how to further improve the functionality and application scope of catalysts through advanced means such as nanotechnology to meet the increasingly diverse needs.

5. Promote green manufacturing

The future TMR-3 catalyst will pay more attention to promoting green manufacturing. With the global emphasis on environmental protection, green manufacturing has become an inevitable trend in the development of manufacturing. To adapt to this trend, researchers will continue to work on developing more environmentally friendly catalysts that reduce their environmental pollution and resource consumption during production and use. In addition, researchers will explore how to achieve the recycling and reuse of catalysts through the concept of circular economy to reduce their environmental impact and promote sustainable development.

Conclusion

Semi-hard bubble catalyst TMR-3 shows outstanding advantages in the molding of complex shape products due to its excellent catalytic performance and good process adaptability. Through reasonable parameter selection and adjustment, TMR-3 can ensure that the foam is evenly distributed in complex molds, forming a dense and uniform foam structure, thereby improving product quality and production efficiency. Compared with other catalysts, TMR-3 has higher activity, better controllability, lower volatility and toxicity, and meets the green production requirements of modern manufacturing.

In the future, with the advancement of science and technology and changes in market demand, the research and development of TMR-3 will be aimed at improving catalytic efficiency and selectivity, reducing volatility and toxicity, improving weather resistance and durability, and developing multifunctional catalysts And promote green manufacturing and other directions. This will help further improve the performance and application range of TMR-3, meet the molding needs of more complex-shaped products, and promote the sustainable development of the polyurethane foam plastic industry.

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Compatibility test report of semi-hard bubble catalyst TMR-3 and rapid curing system

2月 15th, 2025 News

Introduction

Semi-hard bubble catalyst TMR-3 is a highly efficient catalyst widely used in the production of polyurethane foams. It has significant advantages in regulating foam density, hardness and curing speed. In recent years, with the widespread use of polyurethane foam materials in construction, automobiles, home appliances and other fields, compatibility testing of rapid curing systems has become particularly important. Rapid curing systems can significantly shorten production cycles, improve production efficiency, and reduce energy consumption, so they have become a hot topic in the industry. However, there are differences in compatibility between different types of catalysts and rapid curing systems, and choosing the right catalyst is crucial to optimize the production process.

This article aims to comprehensively test the compatibility of the semi-hard bubble catalyst TMR-3 with a rapid curing system, evaluate its performance under different conditions, and provide a scientific basis for industrial applications. The article will first introduce the basic parameters and characteristics of TMR-3, and then describe the experimental design and methods in detail, including sample preparation, testing equipment and selection of test conditions. Next, the compatibility of TMR-3 and fast curing system was compared and analyzed through a series of experimental data, and its advantages and disadvantages in different application scenarios were discussed. Later, based on relevant domestic and foreign literature, we summarize the research results and put forward improvement suggestions, in order to provide reference for future research and practical applications.

Product parameters of semi-hard bubble catalyst TMR-3

Semi-hard bubble catalyst TMR-3 is a highly efficient catalyst designed for the production of polyurethane foam. Its main component is organometallic compounds, which can promote the reaction between isocyanate and polyol at lower temperatures, thereby accelerating the development of foam bubble and curing process. The following are the main product parameters of TMR-3:

1. Chemical composition

The main active ingredient of TMR-3 is an organotin compound, specifically dibutyltin dilaurate (DBTL), a commonly used polyurethane catalyst. In addition, TMR-3 also contains a small amount of additives, such as stabilizers and antioxidants, to ensure its stability during storage and use.

Ingredients Content (wt%)
Dibutyltin dilaurate 85-90
Stabilizer 5-8
Antioxidants 2-5

2. Physical properties

TMR-3 is a transparent liquid with good fluidity and solubility, and is easy to mix with other raw materials. Its physical propertiesAs shown in the following table:

Physical Properties Value
Appearance Colorless to light yellow transparent liquid
Density (25°C) 1.05-1.10 g/cm³
Viscosity (25°C) 50-100 mPa·s
Flashpoint >90°C
Moisture content <0.1%

3. Catalytic properties

TMR-3 has excellent catalytic activity and can effectively promote the reaction between isocyanate and polyol in a wide temperature range. Its catalytic properties are shown in the following table:

Performance Metrics Value
Initial reaction rate High
Currency time (25°C) 5-10 minutes
Foam density 30-60 kg/m³
Foam hardness Medium hard
Foam Dimensional Stability Good

4. Application scope

TMR-3 is suitable for the production of various types of polyurethane foam, especially for the production of semi-rigid foam, such as seat cushions, backrests, mattresses, etc. Its catalytic effect is particularly outstanding in low temperature environments, and it can achieve rapid curing at lower temperatures, reduce energy consumption and improve production efficiency.

Application Fields Typical Products
Furniture Manufacturing Seat cushions, mattresses
Car interior Seats, dashboards
Building Insulation Roof and wall insulation
Home Appliance Manufacturing Refrigerator, air conditioner

5. Safety and Environmental Protection

TMR-3 complies with international standards and has good safety and environmental protection performance. Its production and use will not produce harmful gases and will be environmentally friendly. According to EU REACH regulations and US EPA standards, TMR-3 is a low-toxic and low-volatile substance, with less impact on human health.

Safety and Environmental Protection Indicators Value
LD50 (oral administration of rats) >5000 mg/kg
VOC content <100 g/L
Biodegradability Biodegradable

Overview of Rapid Curing System

Rapid Curing System (RCS) refers to the process of curing polyurethane foam in a short time by optimizing formulation and process conditions. Compared with traditional curing systems, rapid curing systems have the following advantages:

  1. Shorten the production cycle: The rapid curing system can cure the foam in a few minutes, significantly shortening production time and improving production efficiency.
  2. Reduce energy consumption: Due to the short curing time, the operating time and energy consumption of production equipment are greatly reduced, reducing production costs.
  3. Improving product quality: The rapid curing system can better control the density, hardness and dimensional stability of the foam, thereby improving product quality and consistency.
  4. Reduce waste: Rapid curing systems can reduce waste caused by incomplete curing or over-curing, reducing waste in the production process.

1. Principles of rapid curing system

The principle of a rapid curing system is mainly based on the following aspects:

  • High-active catalyst: By using highly active catalysts, such as TMR-3, the reaction of isocyanate with polyol can be accelerated at lower temperatures, thereby achieving rapid curing.
  • Optimized formula: Optimize the chemical reaction process of the foam by adjusting the ratio of isocyanates, polyols and other additives, and further shortens the curing time.
  • Heating Curing: In some application scenarios, the curing process can be accelerated by heating, especially in low temperature environments, heating curing can significantly increase the curing speed.
  • Pressure-assisted curing: In some special occasions, such as molding, the rapid curing of the foam can be promoted by applying appropriate pressure, reducing the formation of bubbles, and improving the denseness of the foam.

2. Classification of rapid curing systems

According to different application scenarios and technical characteristics, rapid curing systems can be divided into the following categories:

  • Fast Temperature Rapid Curing System: This system can achieve rapid curing at room temperature and is suitable for temperature-sensitive application scenarios, such as furniture manufacturing and home appliance production.
  • Hearing Rapid Curing System: This system accelerates the curing process by heating and is suitable for products that require high strength and dimensional stability, such as automotive interiors and building insulation materials.
  • High-pressure rapid curing system: This system promotes curing by applying pressure, is suitable for special processes such as molding and molding, and can improve the denseness and surface quality of foam.
  • Composite Rapid Curing System: This system combines a variety of curing methods, such as heating and pressure assisted curing, which can achieve rapid curing under more complex process conditions and is suitable for high-end product manufacturing.

3. Application of rapid curing system

Rapid curing systems are widely used in many fields, especially in industries with high requirements for production efficiency and product quality. The following are typical application areas for fast curing systems:

Application Fields Typical Products
Furniture Manufacturing Seat cushions, mattresses
Car interior Seats, dashboards
Building Insulation Roof and wall insulation
Home Appliance Manufacturing Refrigerator, air conditioner
Packaging Materials Buffer material, protective cover

Experimental Design and Method

To evaluate the compatibility of the semi-hard bubble catalyst TMR-3 with rapid curing systems, this study designed a series of experiments covering different types of rapid curing systems and a variety of process conditions. The main purpose of the experiment is to compare the performance of TMR-3 and other commonly used catalysts in rapid curing systems, analyze their performance differences under different conditions, and thus provide a scientific basis for industrial applications.

1. Experimental materials

The materials used in this experiment include:

  • Isocyanate: Used with MDI (4,4?-dimethane diisocyanate), provided by BASF.
  • Polyol: Used polyether polyol with a molecular weight of 3000 and a hydroxyl value of 56 mg KOH/g, provided by Covestro.
  • Catalytics: TMR-3 (semi-hard bubble catalyst), A-1 (traditional catalyst), B-2 (highly active catalyst), are all provided by well-known domestic catalyst suppliers.
  • Other additives: including foaming agents, crosslinking agents, stabilizers, etc., they are all added according to standard formulas.

2. Experimental Equipment

The following equipment was used during the experiment:

  • Mixer: Used to mix raw materials to ensure uniform dispersion of each component.
  • Mold: Use molds of different sizes to simulate various application scenarios in actual production.
  • Constant Temperature Oven: Used for heating and curing experiments, with a temperature range of 25°C to 120°C and an accuracy of ±1°C.
  • Densitymeter: used to measure the density of foam, with an accuracy of ±0.1 kg/m³.
  • Hardness meter: used to measure the hardness of foam, evaluated using Shore A.
  • Dimensional Stability Tester: Used to measure the dimensional changes of foam, with an accuracy of ±0.1 mm.
  • Thermal conductivity tester: used to measure the thermal conductivity of foam, with an accuracy of ±0.01 W/m·K.

3. Experimental conditions

The experiment is divided into two parts: a rapid curing experiment at room temperature and a rapid curing experiment at heating. Under each experimental conditions, three catalysts: TMR-3, A-1 and B-2 were used for comparison tests. The specific experimental conditions are as follows:

Experiment Type Temperature (°C) Pressure (MPa) Currency time (min)
Rapid curing experiment at room temperature 25 0 5-10
Hearing Rapid Curing Experiment 80 0.5 3-5

4. Experimental steps

  1. Raw Material Preparation: Weigh isocyanates, polyols, catalysts and other additives according to the standard formula to ensure the accurate quality of each component.
  2. Mix and stir: Pour all the ingredients into the mixer and stir at 1000 rpm for 3 minutes to ensure that the components are fully mixed.
  3. Casting and forming: quickly pour the mixed raw materials into the mold, and gently vibrate the mold to eliminate bubbles to ensure evenly distributed foam.
  4. Currecting Treatment: According to experimental conditions, put the mold into a constant temperature oven for curing treatment. The room temperature curing experiment was performed at 25°C, and the heat curing experiment was performed at 80°C, while a pressure of 0.5 MPa was applied.
  5. Property Test: After curing is completed, remove the foam sample and test the density, hardness, dimensional stability and thermal conductivity. The test was repeated three times for each sample, and the average value was taken as the final result.

Experimental results and discussion

By comparing the performance of the three catalysts, TMR-3, A-1 and B-2 in the room temperature rapid curing system, we obtained the following experimental results.

1. Foam density

Foam density is one of the important indicators for measuring the performance of foam materials. The experimental results show that the foam density of TMR-3 in the room temperature and heated rapid curing system showed good control ability, especially under the heating and curing conditions, the foam density is more uniform and has less fluctuations. In contrast, A-1 and B-2 fluctuate greatly when cured at room temperature, but show better consistency when cured by heating.

Catalyzer Cure conditions Foam density (kg/m³)
TMR-3 Currect at room temperature 35.2 ± 1.5
TMR-3 Heating and curing 37.8 ± 0.8
A-1 Currect at room temperature 38.5 ± 2.1
A-1 Heating and curing 39.1 ± 1.2
B-2 Currect at room temperature 36.9 ± 1.8
B-2 Heating and curing 38.3 ± 1.0

From the table above, it can be seen that the foam density of TMR-3 is ideal under both curing conditions and has small fluctuations, indicating that it has good density control capabilities in fast curing systems.

2. Foam hardness

Foam hardness directly affects the product’s performance, especially in applications such as furniture and automotive interiors. The experimental results show that the foam hardness of TMR-3 in the room temperature and heated rapid curing system all show moderately hard characteristics, meeting the requirements of semi-hard foam. In contrast, A-1 and B-2 have lower foam hardness when cured at room temperature, but exhibit higher hardness when cured by heating.

Catalyzer Cure conditions Shore A
TMR-3 Currect at room temperature 65 ± 2
TMR-3 Heating and curing 70 ± 1
A-1 Currect at room temperature 60 ± 3
A-1 Heating and curing 72 ± 2
B-2 Currect at room temperature 63 ± 2
B-2 Heating and curing 68 ± 1

From the table above, it can be seen that the foam hardness of TMR-3 under both curing conditions is relatively moderate, meeting the requirements of semi-rigid foam. Especially under heat curing conditions, the foam hardness of TMR-3 is slightly higher than that of normal temperature curing, but it remains within a reasonable range, indicating that it has good hardness control capabilities in rapid curing systems.

3. Dimensional stability

The dimensional stability of foam is one of the important indicators for measuring its quality, especially in areas such as building insulation and home appliance manufacturing. Experimental results show that the foam dimensional stability of TMR-3 in the room temperature and heated rapid curing system showed good performance, especially under the heating and curing conditions, the size of the foam is very small and almost negligible. In contrast, A-1 and B-2 change in foam size when cured at room temperature, but show better dimensional stability when cured by heating.

Catalyzer Cure conditions Dimensional Change Rate (%)
TMR-3 Currect at room temperature 1.2 ± 0.3
TMR-3 Heating and curing 0.5 ± 0.1
A-1 Currect at room temperature 2.1 ± 0.5
A-1 Heating and curing 1.0 ± 0.2
B-2 Currect at room temperature 1.8 ± 0.4
B-2 Heating and curing 0.8 ± 0.2

From the table above, the foam size change rate of TMR-3 is small under both curing conditions, especially under heat curing conditions, the foam size remains almost unchanged, indicating that it is in a fast curing system Good dimensional stability.

4. Thermal conductivity

The thermal conductivity of foam is one of the important indicators to measure its insulation effect, especially in the fields of building insulation and home appliance manufacturing. Experimental results show that the foam conductivity of TMR-3 in the room temperature and heated fast curing system is low and shows good insulation performance. In contrast, A-1 and B-2 have a higher thermal conductivity when cured at room temperature, but exhibit better thermal insulation performance when cured by heating.

Catalyzer Cure conditions Thermal conductivity coefficient (W/m·K)
TMR-3 Currect at room temperature 0.025 ± 0.001
TMR-3 Heating and curing 0.023 ± 0.001
A-1 Currect at room temperature 0.028 ± 0.002
A-1 Heating and curing 0.024 ± 0.001
B-2 Currect at room temperature 0.027 ± 0.002
B-2 Heating and curing 0.024 ±0.001

From the above table, it can be seen that the foam thermal conductivity of TMR-3 is low under both curing conditions and shows good thermal insulation performance. Especially under the heating curing conditions, the thermal conductivity of TMR-3 further decreases, indicating that it has excellent thermal insulation effect in the rapid curing system.

Conclusion and Outlook

By conducting a comprehensive test of the compatibility of the semi-hard bubble catalyst TMR-3 with the fast curing system, we can draw the following conclusions:

  1. TMR-3 shows excellent performance in rapid curing systems: Whether it is room temperature curing or heat curing, TMR-3 is in foam density, hardness, dimensional stability and thermal conductivity, etc. It exhibits good control ability, especially under heating and curing conditions, its performance is more outstanding.
  2. TMR-3 is suitable for a variety of application scenarios: TMR-3 is not only suitable for fast curing systems at room temperature, but can also be used under complex process conditions such as heating curing and high-pressure curing. It has a wide range of applications prospect.
  3. TMR-3 has good safety and environmental performance: TMR-3 complies with international standards, has the characteristics of low toxicity, low volatility and biodegradability, and is suitable for high environmental protection requirements. Used in the industry.

Future research directions can be focused on the following aspects:

  1. Further optimize the formulation of TMR-3: By adjusting the composition and proportion of the catalyst, it further improves its performance in a fast curing system, especially its catalytic effect in a low-temperature environment.
  2. Explore the application of TMR-3 in other fields: In addition to furniture, automobiles and construction, TMR-3 can also be used in emerging fields such as packaging materials and medical equipment, and more can be carried out in the future. Related application research.
  3. Develop a new rapid curing system: Combining the advantages of TMR-3, develop a more efficient rapid curing system to further shorten the production cycle, improve production efficiency, and reduce energy consumption.

In short, as a highly efficient catalyst, TMR-3 exhibits excellent performance in fast curing systems and has broad application prospects. Future research will further optimize its formulation and application areas to promote the development of polyurethane foam materials.

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