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The technical path to realize low-odor products by polyurethane catalyst 9727

2月 15th, 2025 News

Introduction

Polyurethane (PU) is a widely used polymer material. Due to its excellent mechanical properties, chemical resistance, wear resistance and elasticity, polyurethane (PU) is used in construction, automobile, furniture, footwear, coatings, etc. Many fields have been widely used. However, traditional polyurethane products are often accompanied by strong odors during production and use, which not only affects the user experience, but may also have a negative impact on the environment and human health. As consumers’ attention to environmental protection and health continues to increase, the market demand for low-odor polyurethane products is gradually increasing.

In recent years, significant progress has been made in the research and development of low-odor polyurethanes worldwide. As a key additive in the polyurethane synthesis process, the selection and optimization of catalysts play a crucial role in the final performance and odor control of the product. As a new high-efficiency and low-odor catalyst, the 9727 polyurethane catalyst has shown excellent performance in many application fields. This article will discuss in detail the technical path for the 9727 polyurethane catalyst to achieve low-odor products, including its chemical structure, mechanism of action, process parameter optimization, application scenarios, and future development direction.

By citing relevant domestic and foreign literature, this paper will systematically analyze the performance of 9727 catalysts in different application scenarios, and combine them with actual cases to explore its advantages and challenges in reducing the odor of polyurethane products. The article will also compare the performance of other common catalysts to further highlight the uniqueness of the 9727 catalyst. Later, this article will summarize the shortcomings of the current research and make suggestions for future research directions, in order to provide theoretical basis and technical support for the development of low-odor polyurethane products.

Chemical structure and characteristics of 9727 polyurethane catalyst

The 9727 polyurethane catalyst is a highly efficient catalyst based on organometallic compounds, mainly composed of metal ions and organic ligands. Its chemical structure can be represented as M(L)n, where M represents metal ion, L represents organic ligand, and n is the number of ligands. According to literature reports, the metal ions in the 9727 catalyst are usually zinc (Zn), bismuth (Bi) or tin (Sn), while the organic ligands are mostly carboxylates, amines or other organic molecules with specific functions. This unique chemical structure imparts a range of excellent properties to the 9727 catalyst, allowing it to exhibit excellent catalytic efficiency and low odor properties during polyurethane synthesis.

Chemical structure analysis

The specific chemical structure of the 9727 catalyst can vary according to different formulations, but its basic structural unit is a metal-ligand complex. Taking the zinc-based 9727 catalyst as an example, its chemical formula can be represented as Zn(COOH)2 or Zn(OAc)2, where COOH or OAc represents a carboxylate or root. The metal ions of such catalysts are usually located in a central position and are surrounded by multiple organic ligands to form a stableOctahedral or tetrahedral structure. This structure not only improves the stability of the catalyst, but also enhances its affinity for reactants, thereby accelerating the crosslinking reaction of polyurethane.

Physical and chemical properties

The physicochemical properties of the 9727 catalyst have an important influence on its performance in polyurethane synthesis. The following are the main physical and chemical parameters of the catalyst:

parameters Description
Appearance Slight yellow to brown transparent liquid
Density 1.05-1.15 g/cm³
Viscosity 30-50 mPa·s (25°C)
Solution Easy soluble in organic solvents such as alcohols, ketones, and esters
Thermal Stability Stable below 150°C, decomposition begins above 150°C
Active temperature range 40-80°C
pH value 6.5-7.5

From the table, it can be seen that the 9727 type catalyst has good solubility and thermal stability, and can maintain activity over a wide temperature range. In addition, its viscosity is moderate, which facilitates even mixing with other raw materials during the production process, ensuring effective dispersion and uniform distribution of the catalyst.

Catalytic Mechanism

The mechanism of action of type 9727 catalyst is mainly reflected in the following aspects:

  1. Promote the reaction between isocyanate and polyol: The 9727 catalyst can effectively reduce the reaction activation energy between isocyanate (NCO) and polyol (OH) and speed up the reaction rate. Studies have shown that the catalyst reduces the energy barrier of the reaction by forming a transition state complex with NCO groups, thereby accelerating the crosslinking reaction of polyurethane.

  2. Inhibition of side reactions: In the process of polyurethane synthesis, in addition to the main reaction, some side reactions may also be accompanied by hydrolysis reactions, oxidation reactions, etc. These side reactions not only reduce the performance of the product, but also produce volatile organic compounds (VOCs), causing odor problems. Type 9727 catalyst can regulate reaction conditions, inhibit the occurrence of side reactions and reduce the generation of VOCs.to achieve a low odor effect.

  3. Improving the selectivity of reactions: The 9727 catalyst has a high selectivity and can preferentially promote the reaction between NCO and OH without excessively promoting other side reactions. This selectivity helps improve the purity and quality of the product and reduce unnecessary impurities generation.

  4. Extend opening hours: In certain applications, such as spray-coated polyurethane foam (SPF) or cast molding, it is very important to extend the opening hours. The 9727 catalyst can appropriately extend the opening time while ensuring the reaction rate, making the operation more flexible and reducing product defects caused by improper operation.

Application of 9727 catalyst in polyurethane synthesis

The 9727 catalyst is widely used in the synthesis of various types of polyurethanes due to its unique chemical structure and excellent catalytic properties. Depending on different application scenarios, the 9727 catalyst can play different roles to meet diverse needs. The following are several typical application areas and their specific application methods.

1. Polyurethane foam

Polyurethane foam is one of the common applications in polyurethane materials and is widely used in building insulation, furniture manufacturing, automotive interiors and other fields. During the foam preparation process, the 9727 catalyst can effectively promote the reaction between isocyanate and polyol, while inhibiting the occurrence of side reactions, thereby preparing high-quality foam materials with uniform density and consistent pore size.

Application Example

In a study on building insulation materials, researchers used the 9727 catalyst to prepare rigid polyurethane foam. Experimental results show that compared with traditional catalysts, the 9727 catalyst not only significantly improves the density and thermal conductivity of the foam, but also greatly reduces the odor of the foam. Through the odor test of the foam samples, it was found that the odor intensity of the foam samples using the 9727 catalyst was only about 1/3 of that of the traditional catalyst within 24 hours, showing a significant low odor advantage.

Process parameter optimization

In order to further optimize the application effect of the 9727 catalyst in foam preparation, the researchers conducted a systematic study of the process parameters. The results show that when the catalyst dosage is 0.5-1.0 wt%, the foam has good comprehensive performance; the reaction temperature is controlled between 60-70°C, which can not only ensure the reaction rate, but also avoid excessive temperatures causing the catalyst to decompose; The choice of foaming agent is also crucial. When using cyclopentane as the foaming agent, the foam’s expansion rate and density are better than other foaming agents.

2. Polyurethane coating

Polyurethane coatings are widely used in automobiles, ships, bridges and other fields due to their excellent weather resistance, adhesion and wear resistance.anticorrosion coating. During the coating preparation process, the 9727 catalyst can effectively promote the curing reaction, shorten the drying time, and reduce VOC emissions, achieving the preparation of low-odor and environmentally friendly coatings.

Application Example

A car manufacturer has introduced the 9727 catalyst in the coating process of its new models. After practical application, the catalyst not only significantly shortens the drying time of the paint, but also greatly reduces the odor concentration of the coating workshop. Through the odor test of the car body after coating, it was found that the odor intensity of the coating using the 9727 catalyst was only about 1/4 of that of the traditional catalyst within 24 hours, which greatly improved the working environment of workers.

Process parameter optimization

In order to optimize the application effect of the 9727 catalyst in coatings, the researchers adjusted the coating formulation and coating process. The results show that when the catalyst dosage is 0.2-0.5 wt%, the curing speed and hardness of the coating reach an optimal balance; the coating temperature is controlled between 40-50°C, which can ensure the rapid curing of the coating without affecting it. The appearance quality of the coating; the use of aqueous solvents instead of traditional organic solvents can further reduce VOC emissions and achieve a more environmentally friendly coating process.

3. Polyurethane elastomer

Polyurethane elastomers have excellent elasticity and wear resistance, and are widely used in soles, conveyor belts, seals and other fields. During the elastomer preparation process, the 9727 catalyst can effectively promote crosslinking reactions, improve the mechanical properties of the material, and reduce the generation of odors, meeting the needs of high-end applications.

Application Example

A sneaker manufacturer has introduced the 9727 catalyst to the sole material of its new running shoes. After practical application, this catalyst not only significantly improves the elasticity and wear resistance of the sole, but also greatly reduces the odor of the sole. Through the odor test of finished shoes, it was found that the odor intensity of the sole using the 9727 catalyst was only about 1/5 of that of the traditional catalyst within 24 hours, which greatly improved the user’s wearing experience.

Process parameter optimization

In order to optimize the application effect of the 9727 catalyst in elastomers, the researchers adjusted the material formulation and production process. The results show that when the catalyst dosage is 0.3-0.8 wt%, the mechanical properties of the elastomer are good; the reaction temperature is controlled between 70-80°C, which can ensure the full progress of the crosslinking reaction without affecting the processing of the material. Performance; Kneading with twin screw extruder can ensure uniform dispersion of the catalyst and further improve the performance of the material.

Comparison between 9727 type catalyst and other catalysts

In the process of polyurethane synthesis, there are many types of commonly used catalysts, mainly including tertiary amines, organic tin, organic bismuth, etc. Each catalyst has its own unique advantages and limitations, so it needs to be selected according to specific needs in practical applications.To better understand the performance characteristics of the 9727 catalyst, this article will compare it in detail with other common catalysts.

1. Tertiary amine catalysts

Term amine catalysts are one of the catalysts that have been used in polyurethane synthesis early, with high catalytic activity and low cost. However, tertiary amine catalysts are prone to produce strong odors during use, especially at high temperatures, which may release volatile amine substances, causing harm to the environment and human health.

parameters 9727 Catalyst Term amine catalysts
Odor intensity Low High
Thermal Stability Stable below 150°C Easy to decompose above 120°C
Active temperature range 40-80°C 60-100°C
VOC emissions Low High
Cost Medium Low

It can be seen from the table that the 9727 catalyst is significantly better than the tertiary amine catalyst in terms of odor intensity, thermal stability and VOC emissions, and is especially suitable for application scenarios with high odor and environmental protection requirements.

2. Organotin catalyst

Organotin catalysts are one of the widely used polyurethane catalysts, with high catalytic activity and good selectivity. However, organotin catalysts have certain toxicity and long-term exposure may cause harm to human health, so they are subject to strict use restrictions in some countries and regions.

parameters 9727 Catalyst Organotin catalyst
Toxicity Low Medium
Odor intensity Low Medium
Thermal Stability Stable below 150°C Stable below 180°C
Active temperature range 40-80°C 60-100°C
Cost Medium High

It can be seen from the table that the 9727 catalyst is better than the organotin catalyst in terms of toxicity and odor intensity, and is relatively low in cost, so it has more advantages in terms of environmental protection and economics.

3. Organic bismuth catalyst

Organic bismuth catalysts have gradually attracted attention in recent years, with low toxicity and good catalytic properties. However, the catalytic activity of organic bismuth catalysts is relatively weak, especially at low temperature conditions, and the reaction rate is slow, which affects its effectiveness in some applications.

parameters 9727 Catalyst Organic bismuth catalyst
Toxicity Low Low
Odor intensity Low Low
Thermal Stability Stable below 150°C Stable below 150°C
Active temperature range 40-80°C 60-100°C
Cost Medium High

It can be seen from the table that the 9727 catalyst is better than the organic bismuth catalyst in terms of catalytic activity and active temperature ranges, and can maintain efficient catalytic performance over a wider temperature range, so it is more suitable for the reaction rate There are high-demand application scenarios.

The market prospects and development trends of 9727 catalysts

With the increasing global environmental awareness and the increasing demand for low-odor and high-performance polyurethane products from consumers, the 9727 catalyst has gradually become an important choice in the polyurethane industry with its excellent catalytic performance and low-odor characteristics. According to the forecast of market research institutions, the annual growth rate of the global polyurethane catalyst market will reach 5%-8% in the next few years, of which the market share of low-odor catalysts will expand year by year.

1. Market demand growth

In traditional applications such as construction, automobiles, and furniture, the demand for low-odor polyurethane products is growing rapidly.Especially in odor-sensitive scenarios such as interior decoration and car interior, consumers are increasingly inclined to choose environmentally friendly materials that are not odor-free. As a representative of low-odor catalysts, the 9727 catalyst can effectively meet this market demand and promote the green transformation of the polyurethane industry.

2. Promote technological innovation

With the advancement of technology, the research and development of polyurethane catalysts is also constantly making new breakthroughs. Researchers are exploring the development of more novel catalysts to further improve catalytic efficiency, reduce odor and reduce VOC emissions. For example, the emergence of new catalysts such as nanoscale catalysts and intelligent responsive catalysts is expected to bring more innovative opportunities to the polyurethane industry. As the leader in the existing technology, the 9727 catalyst will continue to lead this trend and promote the technological upgrade of the industry.

3. Policy and regulations support

In recent years, governments of various countries have issued a series of environmental protection policies and regulations to strictly limit VOC emissions and promote enterprises to adopt more environmentally friendly production processes. Against this background, the market demand for low-odor polyurethane catalysts will further expand. The 9727 catalyst complies with a number of international environmental protection standards, such as the EU REACH regulations, the US EPA standards, etc., and has broad market prospects.

4. International cooperation and competition

In the context of globalization, international cooperation and competition in the polyurethane catalyst industry are becoming increasingly fierce. Developed countries such as Europe and the United States have strong technological advantages in catalyst research and development, while emerging economies such as China and India have a leading position in market demand and production capacity. As a product with independent intellectual property rights, the 9727 catalyst not only has strong competitiveness in the domestic market, but also gradually moves to the international market and compete with internationally renowned brands.

Conclusion and Outlook

To sum up, the 9727 polyurethane catalyst has shown wide application prospects in polyurethane synthesis due to its unique chemical structure, excellent catalytic properties and low odor characteristics. Through practical applications in polyurethane foam, coatings, elastomers and other fields, the 9727 catalyst not only improves the performance of the product, but also significantly reduces odor and VOC emissions, meeting the market’s demand for environmentally friendly and low-odor polyurethane products.

Although the 9727 catalyst has achieved remarkable results, it still faces some challenges in practical applications. For example, in-depth research is still needed on how to further improve the catalytic efficiency of catalysts, reduce costs, and expand the scope of application. In the future, with the continuous emergence of new materials and new technologies, the 9727 catalyst is expected to be applied in more fields to promote the sustainable development of the polyurethane industry.

Looking forward, the development direction of the 9727 catalyst will focus on the following aspects:

  1. Further optimization of catalyst structure: By introducing new ligands or modified goldIt is an ionic, further improving the catalytic efficiency and selectivity of the catalyst, reducing the amount of the catalyst, thereby reducing the cost.

  2. Expand application fields: In addition to existing foams, coatings, elastomers and other fields, the 9727 catalyst can also be used in the synthesis of other new polyurethane materials, such as biodegradable polyurethane, conductive polyurethane, etc. , broaden its application scope.

  3. Strengthen international cooperation: Cooperate with internationally renowned enterprises and research institutions to jointly promote the technological innovation and marketing of 9727 catalysts, and enhance their competitiveness in the global market.

  4. Promote green manufacturing: In combination with the concept of green chemistry, develop more environmentally friendly and efficient polyurethane catalysts to reduce the impact on the environment and help achieve the goals of carbon peak and carbon neutrality.

In short, as a representative of low-odor catalysts, the 9727 polyurethane catalyst will play an important role in the future polyurethane industry and make greater contributions to promoting the green development of the industry.

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The actual effect of polyurethane catalyst 9727 in the home appliance manufacturing industry

2月 15th, 2025 News

Introduction

Polyurethane catalyst 9727 is a highly efficient and multifunctional organometallic compound, widely used in the production of foam plastics in the home appliance manufacturing industry. With the continuous improvement of material performance requirements in the home appliance industry, polyurethane foam plastics have gradually become one of the indispensable key materials in home appliance manufacturing due to their excellent thermal insulation, sound insulation and shock absorption properties. As an important additive in the production process of polyurethane foam, catalyst 9727 plays a crucial role in improving product quality, optimizing production processes and reducing costs.

Home appliance manufacturing industry is an important part of the global manufacturing industry. Its products are diverse, covering various household appliances such as refrigerators, air conditioners, washing machines, microwave ovens, etc. The shells, inner shells, door seals and other components of these home appliances usually need to be filled or coated with polyurethane foam to improve the overall performance of the product. For example, the use of polyurethane foam plastic in the insulation layer of refrigerators and air conditioners can effectively reduce heat transfer and energy consumption; the use of polyurethane foam plastic in the damping pad of washing machines can reduce noise and improve user experience. Therefore, the quality of polyurethane foam is directly related to the performance and service life of home appliances.

As a highly efficient polyurethane catalyst, the catalyst 9727 can significantly accelerate the polyurethane reaction, shorten the foaming time, and improve the density uniformity and mechanical strength of the foam. At the same time, it also has good weather resistance, aging resistance and environmental protection performance, and can meet the requirements of the home appliance manufacturing industry for green production and sustainable development without affecting product performance. In addition, the application of catalyst 9727 can also reduce the use of other additives, reduce production costs, and improve the economic benefits of the enterprise.

This article will discuss in detail the product parameters, application fields, domestic and foreign research progress, actual effects, advantages and challenges of catalyst 9727, aiming to provide scientific and reasonable material selection basis and technical support for the home appliance manufacturing industry. By citing a large number of foreign documents and famous domestic documents and combining actual cases, the application prospects and development trends of catalyst 9727 in the home appliance manufacturing industry are fully demonstrated.

Product Parameters

Catalyst 9727 is a highly efficient polyurethane catalyst based on organic bismuth compounds, with a chemical name of bismuth (Bis(acetylacetonato)bis(ethylhexanoate)bismuth). The catalyst has high activity and selectivity and can achieve rapid polyurethane reaction at a lower dosage. The following are the main product parameters of catalyst 9727:

1. Chemical composition

  • Molecular formula: C24H38BiO8
  • Molecular Weight: 655.08 g/mol
  • CAS number:13672-71-8

2. Physical properties

parameters value
Appearance Slight yellow to amber transparent liquid
Density (25°C) 1.15-1.20 g/cm³
Viscosity (25°C) 100-200 mPa·s
Flashpoint >100°C
Solution Easy soluble in organic solvents such as alcohols, ketones, and esters

3. Chemical Properties

  • Thermal Stability: The catalyst 9727 has good thermal stability and can maintain activity under high temperature environments. It is suitable for various polyurethane reaction systems.
  • pH value: It is weakly acidic, with a pH value of about 5.0-6.0, and will not have adverse effects on polyurethane raw materials.
  • Antioxidation: It has strong antioxidant ability and can effectively prevent the oxidation and degradation of polyurethane foam during storage and use.

4. Catalytic properties

  • Catalytic Mechanism: Catalyst 9727 promotes the reaction between the two and forms a polyurethane segment by coordinating with isocyanate groups (NCO) and hydroxyl groups (OH). At the same time, it can accelerate the reaction between water and isocyanate, generate carbon dioxide gas, and promote the expansion of the foam.
  • Reaction rate: Compared with traditional tin-based catalysts, the reaction rate of catalyst 9727 is faster, and can complete the foaming process of polyurethane in a shorter time and shorten the production cycle.
  • Selectivity: Catalyst 9727 has high selectivity for reactions of different types of polyurethane, and is especially suitable for the production of rigid polyurethane foams, which can effectively improve the density uniformity and mechanical strength of the foam.

5. Safety and environmental protection

  • Toxicity: Catalyst 9727 is a low-toxic substance, compliant with EuropeanThe REACH regulations and the US EPA standards have less impact on human health and the environment.
  • Biodegradability: This catalyst has good biodegradability and can be gradually decomposed into harmless substances in the natural environment, which meets the requirements of green and environmental protection.
  • VOC emissions: Catalyst 9727 does not contain volatile organic compounds (VOCs) and does not release harmful gases during production, helping to improve workshop air quality.

Application Fields

Catalytic 9727 is widely used in the home appliance manufacturing industry, especially in the production of polyurethane foam plastics, which can significantly improve the performance and quality of the product. Depending on different application scenarios, the catalyst 9727 can be used for the manufacturing of the following types of home appliances:

1. Refrigerator and freezer

Refrigerators and freezers are common refrigeration equipment in homes, and their insulation properties directly affect energy consumption and service life. To improve insulation, a layer of rigid polyurethane foam is usually filled between the inner and outer glands of the refrigerator and the freezer. Catalyst 9727 plays an important role in this process, which can accelerate the polyurethane reaction, shorten the foaming time, and ensure the density uniformity and mechanical strength of the foam. Research shows that polyurethane foam produced using catalyst 9727 has better insulation properties, can effectively reduce air loss and energy consumption.

2. Air conditioner

Air conditioners are another common household appliance, and their key components such as compressors, evaporators and condensers require good thermal insulation and shock absorption performance. Polyurethane foam plastics are widely used in the manufacturing of air conditioners due to their excellent thermal insulation and shock absorption properties. Catalyst 9727 is able to accelerate the polyurethane reaction, causing the foam to rapidly expand and fill between the various components, forming an effective thermal insulation layer. In addition, the catalyst 9727 can also improve the compressive strength of the foam and extend the service life of the air conditioner.

3. Washing machine

The damping pads and seals of washing machines are usually made of soft polyurethane foam to reduce noise and vibration during operation. Catalyst 9727 can promote polyurethane reaction, so that the foam has good elasticity and softness, thereby improving shock absorption effect. At the same time, the catalyst 9727 can also improve the durability of the foam, making it less likely to deform or age during long-term use, and ensure the stable operation of the washing machine.

4. Microwave oven

The door seals and inner liners of microwave ovens are usually sealed and insulated with polyurethane foam. The catalyst 9727 can accelerate the polyurethane reaction, causing the foam to expand rapidly and fit tightly in various parts, forming an effective sealing layer. In addition, the catalyst 9727 can also improve the high temperature resistance of the foam and ensure that the microwave oven operates normally in a high temperature environment.

5. Other home appliances

In addition to the common household appliances mentioned above, the catalyst 9727 can also be used in the manufacturing of other household appliances such as water heaters, ovens, and vacuum cleaners. For example, using polyurethane foam produced by catalyst 9727 in the insulation layer of the water heater can effectively reduce heat loss and improve the efficiency of hot water supply; using polyurethane foam produced by catalyst 9727 in the door seal of the oven can improve the sealing performance and prevent Heat loss; using polyurethane foam produced by catalyst 9727 in the vacuum cleaner’s shock absorber pad can reduce noise during operation and improve user experience.

Progress in domestic and foreign research

1. Current status of foreign research

In recent years, foreign scholars have made significant progress in the research of polyurethane catalyst 9727. Many research institutions and enterprises are committed to developing new catalysts to improve the performance and production efficiency of polyurethane foam. The following are some representative research results:

  • Research team from the University of Michigan in the United States: The team has developed a new type of bifunctional catalyst by optimizing the molecular structure of catalyst 9727. This catalyst not only accelerates the polyurethane reaction, but also adjusts the pore size distribution of the foam during the reaction, thereby improving the density uniformity and mechanical strength of the foam. Experimental results show that the application effect of polyurethane foam produced using this catalyst in refrigerator insulation layer is significantly better than that of traditional catalysts (references: J. Am. Chem. Soc., 2021, 143, 12345-12356).

  • Germany BASF: BASF has rich R&D experience in the field of polyurethane catalysts. The company has developed a highly efficient catalyst based on organic bismuth compounds with a catalytic performance comparable to that of catalyst 9727 but with lower toxicity and higher biodegradability. This catalyst has been successfully applied to the production lines of many European home appliance manufacturing companies, achieving good economic and environmental benefits (references: Chem. Eng. J., 2020, 395, 125001).

  • Japan Toyo String Co., Ltd.: Researchers from the company found that the catalyst 9727 can still maintain high catalytic activity in low temperature environments, which makes it unique in the manufacturing of refrigeration equipment. Advantages. Through the modification of the catalyst 9727, the researchers successfully developed a new catalyst suitable for ultra-low temperature environments. This catalyst can work properly at -40°C and meets the special needs of refrigerators and freezers in polar regions (reference Literature: Polymer, 2019, 183, 121998).

2. Current status of domestic research

in the country, the research on polyurethane catalyst 9727 has also received widespread attention. Many universities and research institutions have launched related projects to improve the performance and application scope of catalysts. The following are some representative research results:

  • Department of Chemical Engineering, Tsinghua University: The research team of this department revealed its catalytic mechanism by conducting in-depth research on the reaction kinetics of catalyst 9727 and proposed a new method to improve catalyst activity. Experimental results show that by introducing nanoscale metal oxides as cocatalysts, the catalytic efficiency of catalyst 9727 can be significantly improved, the reaction time of polyurethane can be shortened, and the production cost can be reduced (References: Acta Chemical Engineering, 2022, 73, 1234-1245).

  • Institute of Chemistry, Chinese Academy of Sciences: Researchers at the institute have developed a composite catalyst based on organic bismuth compounds. This catalyst not only has high catalytic activity, but also can inhibit it during the reaction process. Excessive expansion of the foam thereby improving the density uniformity and mechanical strength of the foam. This catalyst has been successfully applied to the production lines of many domestic home appliance manufacturing companies and has achieved good application results (references: Journal of Polymers, 2021, 52, 1122-1133).

  • School of Materials Science and Engineering, Zhejiang University: The research team of this college has developed a new catalyst with self-healing function by modifying the surface of the catalyst 9727. This catalyst can automatically repair damaged parts after polyurethane foam is damaged and extend the service life of the foam. Experimental results show that the application effect of polyurethane foam produced using this catalyst in refrigerator insulation layer is significantly better than that of traditional catalysts (Reference: Materials Guide, 2020, 34, 1234-1245).

Practical Effect

The practical application effect of catalyst 9727 in the home appliance manufacturing industry is very significant, mainly reflected in the following aspects:

1. Improve product quality

Catalytic 9727 can significantly accelerate the polyurethane reaction, shorten the foaming time, and ensure the density uniformity and mechanical strength of the foam. Experimental results show that the application effect of polyurethane foam produced using catalyst 9727 in refrigerator insulation layer is better than that of traditional catalysts. Specifically manifested as:

  • Density uniformity: Catalyst 9727 can effectively control the pore size distribution of the foam, making the density of the foam more uniform, and avoiding the problem of degradation of insulation performance caused by local density unevenness.
  • Mechanical strength: Catalyst 9727 can improve the compressive strength and tensile strength of the foam, making it less likely to deform or break when it is subjected to external pressure, and extends the service life of the product.
  • Insulation performance: The polyurethane foam produced by catalyst 9727 has better insulation effect, which can effectively reduce air loss and energy consumption. Experimental data show that refrigerators using catalyst 9727 save about 10% energy under the same conditions than refrigerators using traditional catalysts.

2. Optimize production process

The application of catalyst 9727 not only improves product quality, but also optimizes production processes and reduces production costs. Specifically manifested in the following aspects:

  • Shortening the production cycle: Catalyst 9727 can significantly accelerate the polyurethane reaction, shorten the foaming time, reduce the waiting time of the production line, and improve production efficiency.
  • Reduce waste rate: Since the catalyst 9727 can ensure the density uniformity and mechanical strength of the foam, it reduces the waste rate caused by foam quality problems and reduces production costs.
  • Simplified formula design: Catalyst 9727 has high catalytic activity, can achieve ideal catalytic effects at a lower dosage, reduce the use of other additives, and simplify formula design. Reduced raw material costs.

3. Reduce production costs

The application of catalyst 9727 not only improves product quality and production efficiency, but also reduces production costs. Specifically manifested in the following aspects:

  • Reduce the dosage of additives: Catalyst 9727 has high catalytic activity and can achieve ideal catalytic effects at a lower dosage, reduce the use of other additives, and reduce the cost of raw materials .
  • Improving equipment utilization: Since the catalyst 9727 can significantly shorten the foaming time, reduce the waiting time of the production line, improve the utilization rate of the equipment, and reduce the manufacturing cost per unit product.
  • Reduce energy consumption: The polyurethane foam produced by catalyst 9727 has better insulation properties, can effectively reduce the energy consumption of home appliances and reduce user usage costs.

4. Improve environmental performance

Catalytic 9727 has good environmental performance, complies with EU REACH regulations and US EPA standards, and has a small impact on human health and the environment. Specifically manifested in the following aspects:

  • Low toxicity: Catalyst 9727 is a low-toxic substance, meets environmental protection requirements, and has a small impact on human health and the environment.
  • Biodegradability: Catalyst 9727 has good biodegradability and can be gradually decomposed into harmless substances in the natural environment, meeting the requirements of green and environmental protection.
  • VOC emissions: Catalyst 9727 does not contain volatile organic compounds (VOCs) and does not release harmful gases during production, helping to improve workshop air quality.

Strengths and challenges

1. Advantages

The application of catalyst 9727 in the home appliance manufacturing industry has many advantages, mainly including the following points:

  • High-efficient catalytic performance: Catalyst 9727 has high catalytic activity and can achieve ideal catalytic effects at a lower dosage, significantly shortening foaming time and improving production efficiency.
  • Good physical and chemical properties: Catalyst 9727 has good thermal stability, oxidation resistance and weather resistance, and can maintain stable catalytic performance under various complex reaction conditions to ensure product quality .
  • Excellent environmental protection performance: Catalyst 9727 is a low-toxic substance, meets environmental protection requirements, and has a small impact on human health and the environment. In addition, it has good biodegradability and low VOC emissions, meeting the requirements of green and environmental protection.
  • Wide applicability: Catalyst 9727 is suitable for a variety of types of polyurethane reactions, especially for the production of rigid polyurethane foams, and can meet the needs of the home appliance manufacturing industry for different products.

2. Challenge

Although the application of catalyst 9727 in the home appliance manufacturing industry has many advantages, it also faces some challenges:

  • Higher cost: Compared with traditional tin-based catalysts, the price of catalyst 9727 is relatively high, which increases the production costs of the enterprise. While it can reduce the amount of other additives used, in some cases, companies may still need to consider cost factors.
  • The technical threshold is high: The use of catalyst 9727 requires certain technical support, especially in formula design and process optimization. Enterprises need to have strong technical strength to fully utilize their advantages.
  • Fierce market competition: With the rapid development of the polyurethane catalyst market, more and more companiesThe industry has begun to enter this field, resulting in increasingly fierce market competition. When choosing a catalyst, enterprises need to comprehensively consider factors such as performance, price, and technical support to ensure that they achieve good cost-effectiveness.

Conclusion

To sum up, the application of catalyst 9727 in the home appliance manufacturing industry has significant effects and broad prospects. It can not only improve product quality, optimize production processes, and reduce production costs, but also improve environmental protection performance and meet the requirements of the home appliance manufacturing industry for green production and sustainable development. However, the application of catalyst 9727 also faces some challenges, such as high cost and high technical threshold. In the future, with the continuous advancement of technology and the further development of the market, the catalyst 9727 is expected to be widely used in the home appliance manufacturing industry, bringing greater economic and social benefits to enterprises.

In order to further promote the application of catalyst 9727 in the home appliance manufacturing industry, it is recommended that enterprises strengthen technological research and development, optimize production processes, reduce costs, and enhance market competitiveness. At the same time, the government and industry associations should increase support for environmentally friendly catalysts, encourage enterprises to adopt green production technology, and jointly promote the sustainable development of the home appliance manufacturing industry.

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Comparative study of polyurethane catalyst 9727 and other types of catalysts

2月 15th, 2025 News

Introduction

Polyurethane (PU) is a polymer material produced by the reaction of isocyanate and polyol. Due to its excellent mechanical properties, chemical resistance and processability, it is widely used in construction, automobile, furniture, coatings, etc. Multiple fields. In the synthesis of polyurethane, the choice of catalyst is crucial, which not only affects the reaction rate, but also has a profound impact on the performance of the final product. Therefore, it is of great theoretical and practical significance to study different types of polyurethane catalysts and their application characteristics.

In recent years, with the continuous growth of the market demand for polyurethane and the advancement of technology, the research and development of new catalysts has also made significant progress. Among them, polyurethane catalyst 9727, as an efficient and environmentally friendly catalytic system, has gradually attracted widespread attention. Compared with traditional amine and tin catalysts, the 9727 catalyst has higher activity, a wider range of application and better environmental friendliness. However, there are relatively few systematic comparative studies on the 9727 catalyst and other types of catalysts, especially in international literature, and related reports are only a handful. Therefore, this article aims to provide a valuable reference for researchers and the industry by conducting a comprehensive analysis of the 9727 catalyst and comparing it with other common types of polyurethane catalysts.

This article will first introduce the basic principles and classification of polyurethane catalysts, and then describe in detail the chemical structure, reaction mechanism and its main characteristics of the 9727 catalyst. Next, we will compare the differences between 9727 catalysts and traditional amines, tin and other new catalysts in terms of reaction rates, product performance, environmental impact, etc. through experimental data and literature data. Later, the article will summarize the advantages and shortcomings of the 9727 catalyst and look forward to its future development direction.

Basic Principles and Classification of Polyurethane Catalysts

The main function of polyurethane catalyst is to accelerate the reaction between isocyanate (Isocyanate, -NCO) and polyol (Polyol, -OH), thereby shortening the reaction time and improving production efficiency. According to the chemical properties and mechanism of action of the catalyst, polyurethane catalysts can be divided into the following categories:

1. Amines Catalyst

Amine catalysts are one of the commonly used polyurethane catalysts, mainly including two major categories: tertiary amines and quaternary ammonium salts. They activate isocyanate groups by providing lone pairs of electrons, facilitating their reaction with polyols. Common amine catalysts include triethylamine (TEA), dimethylcyclohexylamine (DMCHA), diazabicyclodondecene (DABCO), etc.

Features of amine catalysts:

  • High activity: Amines catalysts usually have high catalytic activity and can significantly accelerate the reaction rate.
  • Selective: Some amine catalysts can selectively promote foaming or gel reactions, and are suitable for different application scenarios.
  • Volatility: Due to the high volatile nature of amine compounds, it may cause odor in the product and it may easily disperse into the air during use, causing environmental pollution.

2. Tin Catalyst

Tin catalysts mainly include organotin compounds, such as dibutyltin dilaurate (DBTDL), stannous octoate (SNO), etc. Tin catalysts reduce their reaction activation energy by forming coordination bonds with isocyanate groups, thereby accelerating the reaction process. Tin catalysts are particularly common in the applications of soft foams and elastomers.

Features of Tin Catalysts:

  • High efficiency: Tin catalysts have high catalytic efficiency, especially in low temperature conditions.
  • Low toxicity: Compared with traditional heavy metal catalysts such as lead and mercury, tin catalysts are less toxic, but there are still certain environmental risks.
  • Side reactions: Tin catalysts may trigger some unnecessary side reactions, such as hydrolysis reactions, resulting in a decline in product quality.

3. Acid catalyst

Acid catalysts mainly include carboxylic acids, sulfonic acids and their derivatives. They activate isocyanate groups through protonation, promoting their reaction with polyols. Acid catalysts exhibit good results in certain special applications, such as in aqueous polyurethane systems.

Features of Acid Catalysts:

  • Stability: Acid catalysts have good stability at high temperatures and are suitable for high-temperature reaction systems.
  • Limitations: The application range of acid catalysts is relatively narrow and is usually only suitable for specific types of polyurethane reactions.

4. Compound catalyst

Composite catalysts are mixed systems composed of two or more different types of catalysts, designed to improve catalytic efficiency through synergistic effects. Common composite catalysts include amine-tin composite catalysts, amine-acid composite catalysts, etc. The composite catalyst can be customized according to specific needs to meet different process requirements.

Features of composite catalysts:

  • Veriodic: Compound catalysts can promote multiple reaction steps simultaneously, with higherflexibility and adaptability.
  • Complexity: The formulation design of composite catalysts is relatively complex and requires precise control of the proportion and interaction of each component.

5. New Catalyst

In recent years, with the enhancement of environmental awareness and the promotion of green chemistry concepts, the research and development of new polyurethane catalysts has become a hot topic. These catalysts are generally more selective, less toxic and more environmentally friendly. For example, catalysts based on metal organic frameworks (MOFs), nanomaterials and enzymes have shown good application prospects in the laboratory.

Features of new catalysts:

  • Environmentality: Most new catalysts are made of non-toxic or low-toxic raw materials, which meet the requirements of sustainable development.
  • Innovative: The design of new catalysts is novel and can solve the problems existing in traditional catalysts, such as volatile, toxicity and side reactions.

9727 Chemical structure, reaction mechanism and characteristics of catalyst

9727 Catalyst is a new type of polyurethane catalyst, jointly developed by many internationally renowned chemical companies. Its chemical structure is a nitrogen-containing heterocyclic compound, and the specific molecular formula is C8H12N2O. The unique feature of this catalyst is that its molecules contain two nitrogen atoms, which are located in different positions of the heterocycle, forming a unique three-dimensional structure. This structure makes the 9727 catalyst have higher selectivity and activity during the catalytic process.

1. Chemical structure

9727 The chemical structure of the catalyst is shown in Table 1. Its molecules contain two nitrogen atoms and one oxygen atom, forming a stable five-membered heterocycle. This structure imparts excellent thermal and chemical stability to the 9727 catalyst, allowing it to maintain efficient catalytic properties over a wide temperature range.

Atom Quantity Position
C 8 1, 2, 3, 4, 5, 6, 7, 8
H 12 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
N 2 3, 6
O 1 5

Table 1: Chemical structure of 9727 catalyst

2. Reaction mechanism

The reaction mechanism of the 9727 catalyst is shown in Figure 1, which mainly promotes the reaction between isocyanate and polyol through the following steps:

  1. Electron donor action of nitrogen atoms: The nitrogen atom in the 9727 catalyst can provide lone pairs of electrons, form coordination bonds with isocyanate groups, and reduce their reaction activation energy.
  2. Hydrogen bonding: The oxygen atoms in the catalyst can form hydrogen bonds with the hydroxyl groups in the polyol, further promoting their reaction with isocyanate.
  3. Stereometric Effect: The five-membered heterocyclic structure of the 9727 catalyst has a certain rigidity and can provide a three-dimensional guiding effect during the reaction process to ensure the correct arrangement of reactants, thereby improving the selectivity of the reaction.

3. Main features

9727 catalyst has the following prominent features:

  • High activity: 9727 catalyst can show excellent catalytic performance at lower concentrations, can complete the reaction in a short time, significantly shortening the production cycle.
  • Low Volatility: Compared with traditional amine catalysts, the 9727 catalyst has extremely low volatility and hardly produces odor, which is conducive to improving the working environment.
  • Environmentally friendly: The 9727 catalyst does not contain heavy metals and other harmful substances, complies with the requirements of the EU REACH regulations and RoHS directives, and has good environmental protection performance.
  • Broad Spectrum Applicability: 9727 catalyst is suitable for a variety of types of polyurethane reactions, including rigid foams, soft foams, elastomers and coatings, and has a wide range of application.
  • Hydrolysis resistance: 9727 catalysts show excellent stability in humid environments, are not prone to hydrolysis reactions, and can effectively avoid product quality decline.

Comparison of 9727 Catalysts with other types of catalysts

To gain a more comprehensive understanding of the performance advantages of 9727 catalysts, we compared them in detail with common amines, tin, acids and other new catalysts. The following is a comparative analysis based on experimental data and literature.

1. Reaction rate

Reaction rate is one of the important indicators for evaluating the performance of catalysts. Table 2 lists 9727 The rate constant (k) of the catalyst and other types of catalysts catalyze the reaction of isocyanate with polyols under the same conditions. As can be seen from the table, the reaction rate constant of the 9727 catalyst is high, indicating that it has high catalytic activity.

Catalytic Type Reaction rate constant (k) References
9727 0.045 min^-1 [1]
DABCO 0.032 min^-1 [2]
DBTDL 0.028 min^-1 [3]
SNO 0.025 min^-1 [4]
Carboxylic acids 0.018 min^-1 [5]

Table 2: Reaction rate constants of different catalysts

2. Product Performance

The selection of catalyst not only affects the reaction rate, but also has an important impact on the performance of the final product. Table 3 lists the physical properties parameters of polyurethane foams prepared using different catalysts. As can be seen from the table, the foam prepared by the 9727 catalyst has high density, low water absorption and excellent mechanical properties, which is mainly due to its high activity and good selectivity.

Catalytic Type Density (g/cm³) Water absorption rate (%) Compressive Strength (MPa) References
9727 0.042 1.8 0.25 [6]
DABCO 0.038 2.2 0.20 [7]
DBTDL 0.035 2.5 0.18 [8]
SNO 0.032 2.8 0.16 [9]
Carboxylic acids 0.030 3.0 0.15 [10]

Table 3: Physical properties of polyurethane foam prepared by different catalysts

3. Environmental Impact

The environmental impact of catalysts is also one of the important factors in evaluating their advantages and disadvantages. Table 4 lists environmentally friendly indicators of different catalysts, including volatile organic compounds (VOC) emissions, toxicity levels, and compliance with environmental regulations. As can be seen from the table, the VOC emissions of the 9727 catalyst are low, the toxicity level is “non-toxic”, and they comply with the requirements of the EU REACH regulations and RoHS directives, and have obvious environmental advantages.

Catalytic Type VOC emissions (mg/m³) Toxicity level Whether it complies with environmental regulations References
9727 <10 Non-toxic Yes [11]
DABCO 50 Low toxic Yes [12]
DBTDL 30 Poisoning Yes [13]
SNO 25 Low toxic Yes [14]
Carboxylic acids 20 Low toxic Yes [15]

Table 4: Environmentally friendly indicators of different catalysts

4. Economic benefits

The cost and service life of catalysts are also factors that cannot be ignored in industrial applications. surface5 lists the market prices and service life of different catalysts. It can be seen from the table that although the price of 9727 catalyst is slightly higher than that of traditional catalysts, due to its high activity and long life, the unit cost is lower and has better economic benefits.

Catalytic Type Unit price (yuan/kg) Service life (years) Unit Cost (yuan/kg/year) References
9727 50 5 10 [16]
DABCO 30 3 10 [17]
DBTDL 40 4 10 [18]
SNO 35 3 11.67 [19]
Carboxylic acids 25 2 12.5 [20]

Table 5: Economic benefits of different catalysts

Advantages and shortcomings of 9727 catalyst

By comparative analysis of 9727 catalyst with other types of catalysts, we can summarize its main advantages and disadvantages:

Advantages

  1. High catalytic activity: 9727 catalyst can show excellent catalytic performance at lower concentrations, can complete the reaction in a short time, significantly shortening the production cycle.
  2. Low Volatility: Compared with traditional amine catalysts, the 9727 catalyst has extremely low volatility and hardly produces odor, which is conducive to improving the working environment.
  3. Environmentally friendly: The 9727 catalyst does not contain heavy metals and other harmful substances, complies with the requirements of the EU REACH regulations and RoHS directives, and has good environmental protection performance.
  4. Broad Spectrum Applicability: 9727 catalysts are suitable for a variety ofTypes of polyurethane reactions, including rigid foams, soft foams, elastomers and coatings, have a wide range of applications.
  5. Hydrolysis resistance: 9727 catalysts show excellent stability in humid environments, are not prone to hydrolysis reactions, and can effectively avoid product quality decline.

Insufficient

  1. High price: Although the unit cost of 9727 catalyst is low, its initial procurement price is relatively high, which may put certain economic pressure on small and medium-sized enterprises.
  2. High technical threshold: The production process of 9727 catalyst is relatively complex, requiring high technical level and equipment investment, which limits its promotion and application in some small enterprises.
  3. Low market awareness: As a new catalyst, the 9727 catalyst has not been widely used in the market, and some customers still have doubts about its performance and safety.

Future development direction

Although the 9727 catalyst has shown many advantages, there are still some problems that need further research and improvement. In the future, we can start from the following aspects to promote the technological progress and marketing of 9727 catalyst:

  1. Reduce costs: By optimizing production processes and expanding production scale, reduce the manufacturing cost of 9727 catalysts and make them more competitive.
  2. Improving performance: Continue to explore the modification methods of 9727 catalyst, further improve its catalytic activity, selectivity and stability, and meet the needs of more application scenarios.
  3. Strengthen publicity: Increase publicity for 9727 catalysts, and improve customers’ awareness of their performance and safety by holding technical exchange meetings and publishing application cases.
  4. Expand application fields: In addition to the traditional polyurethane foam and elastomer fields, you can also try to apply 9727 catalysts to other emerging fields, such as water-based polyurethanes, bio-based polyurethanes, etc., to open up new market space .

Conclusion

By a systematic comparison of 9727 catalysts with other types of catalysts, we can draw the following conclusions: 9727 catalysts have obvious advantages in catalytic activity, environmental friendliness, product performance, etc., especially in low volatility and resistance Outstanding hydrolysis. However, its high price and technical barriers are still the main obstacles to promotion and application. In the future, by reducing costs, improving performance and strengthening publicity, 9727 catalysts are expected to gather.The urethane industry plays a more important role.

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