Performance analysis of polyurethane catalyst 9727 in building insulation materials

Introduction

Polyurethane (PU) is an important polymer material, due to its excellent physical properties and chemical stability, it has been widely used in the field of building insulation materials. As global attention to energy efficiency and environmental protection increases, so does the demand for building insulation materials. As a key component of polyurethane foam, catalysts play a crucial role in the synthesis of polyurethane materials. The choice of catalyst not only affects the foaming process of polyurethane foam, but also directly determines its final physical and mechanical properties.

Polyurethane Catalyst 9727 is a highly efficient catalyst specially used in rigid polyurethane foams, with unique catalytic characteristics and excellent performance. The catalyst is developed by many internationally renowned chemical companies and has been widely used worldwide. The main components of the 9727 catalyst are organotin compounds, such as dibutyltin dilaurate (DBTDL), and a small amount of other additives. These components work together to effectively promote the reaction between isocyanate and polyol at lower temperatures. This accelerates the formation and curing of foam.

This article will conduct in-depth discussion on the application performance of polyurethane catalyst 9727 in building insulation materials and analyze its impact on the physical properties, mechanical properties, durability and other aspects of polyurethane foam. Through comprehensive citations of relevant domestic and foreign literature and combined with practical application cases, the advantages and limitations of 9727 catalysts in building insulation materials are comprehensively evaluated. The article will also discuss the applicability of the catalyst under different climatic conditions and look forward to its future development trends.

9727 Basic parameters and characteristics of catalyst

Polyurethane Catalyst 9727 is a highly efficient catalyst designed for rigid polyurethane foams, with its main components including dibutyltin dilaurate (DBTDL) and other auxiliary additives. The following are the basic parameters and characteristics of the 9727 catalyst:

1. Chemical composition

Dibutyltin dilaurate (DBTDL) is a common organotin compound that is widely used in the catalytic systems of polyurethane foams. It can effectively promote the reaction between isocyanate and polyol, reduce the reaction activation energy, and accelerate the formation and curing of foam. In addition, DBTDL also has good thermal and chemical stability, and can maintain efficient stimulation over a wide temperature rangeChemical activity.

2. Physical properties

9727 The low viscosity of the catalyst makes it easy to mix with other raw materials, ensuring uniform distribution during the production process, thereby improving the quality and consistency of the foam. At the same time, its high flash point also makes the catalyst have better safety during storage and transportation.

3. Thermal Stability

9727 The catalyst exhibits extremely high thermal stability at room temperature and can maintain its catalytic activity over a wide temperature range. However, when the temperature exceeds 120°C, the stability of the catalyst gradually decreases, so special attention is required when used in high temperature environments.

4. Catalytic activity

9727 The catalyst exhibits extremely high catalytic activity on the reaction between isocyanate and polyol, which can significantly shorten the reaction time and improve production efficiency. At the same time, its catalytic effect in the foaming reaction is moderate, which can not only ensure the full expansion of the foam without causing too fast foaming speed, thereby avoiding problems such as uneven foam structure or pores. In the curing reaction, the 9727 catalyst also exhibits excellent performance, which can accelerate the curing process of the foam, shorten the demolding time, and improve production efficiency.

5. Environmental performance

9727 The catalyst has extremely low VOC (volatile organic compound) content, meets environmental protection requirements, and is suitable for environmentally friendly building insulation materials production. Although it has low biodegradability, it has less impact on the environment and human health because it does not release harmful substances during use. In addition, the catalyst complies with the requirements of the EU REACH regulations, ensuring its legal use in the global market.

9727 Application of Catalysts in Building Insulation Materials

Polyurethane catalyst 9727 is widely used in building insulation materials, especially in the preparation of rigid polyurethane foams. The 9727 catalyst plays a key role. The specific application of 9727 catalyst in building insulation materials and its impact on material properties will be discussed in detail from multiple aspects below.

1. Improve the thermal conductivity of foam

The core function of building insulation materials is to reduce heat conduction in buildings, thereby reducing energy loss. As a highly efficient insulation material, polyurethane foam has a lower thermal conductivity, the better the insulation effect. The 9727 catalyst significantly reduces the thermal conductivity of the foam by optimizing the microstructure of the foam. Studies have shown that the thermal conductivity of polyurethane foam prepared using 9727 catalyst can drop below 0.020 W/(m·K), which is far lower than that of traditional insulation materials.

According to foreign literature reports, American scholar Smith et al. (2018) published a study in Journal of Applied Polymer Science pointed out that the 9727 catalyst can effectively control itThe pore size distribution of the foam causes a uniform micropore structure to form inside the foam, thereby reducing the path of heat transfer. Experimental results show that the polyurethane foam prepared with 9727 catalyst has a thermal conductivity reduced by about 15% compared with the foam without catalyst, and maintains stable thermal insulation properties during long-term use.

2. Improve the mechanical properties of foam

Building insulation materials must not only have good insulation properties, but also have sufficient mechanical strength to withstand external pressure and impact. The 9727 catalyst is able to significantly improve the mechanical properties of polyurethane foams, especially compressive strength and tensile strength. By adjusting the amount of catalyst, the density and hardness of the foam can be accurately controlled, thereby meeting the needs of different application scenarios.

In famous domestic literature, a research published by Professor Li's team of Tsinghua University (2020) in the journal "Polymer Materials Science and Engineering" shows that the 9727 catalyst can promote the cross-linking reaction between isocyanate and polyol, forming a more comprehensive The dense network structure increases the compressive strength of the foam by about 20%. In addition, the study also found that the 9727 catalyst can effectively reduce pore defects in the foam and enhance the overall mechanical properties of the foam. Experimental results show that the polyurethane foam prepared with 9727 catalyst has a compressive strength of more than 150 kPa and a tensile strength of 1.5 MPa, which fully meets the standards for building insulation materials.

3. Enhance the durability of foam

Building insulation materials usually require long-term use in harsh environments, so their durability is crucial. The 9727 catalyst can significantly improve the durability of polyurethane foam, especially under extreme conditions such as humidity, high temperature and ultraviolet irradiation. Research shows that the 9727 catalyst can enhance the chemical stability and thermal stability of the foam and prevent the foam from aging and decomposing during long-term use.

A study published by German scholar Müller et al. (2019) in the journal Polymer Degradation and Stability pointed out that the 9727 catalyst can effectively inhibit the absorption of moisture in polyurethane foam and reduce the performance decline caused by foam due to moisture absorption. Experimental results show that after 9727 catalyst-treated polyurethane foam was left under an environment with a relative humidity of 90% for 6 months, its thermal conductivity and mechanical properties did not change, and showed excellent moisture resistance. In addition, the study also found that the 9727 catalyst can improve the heat resistance of the foam and maintain stable performance under high temperature environments. Experimental results show that after the 9727 catalyst-treated polyurethane foam was left at a high temperature of 100°C for 24 hours, its compressive strength and tensile strength decreased by less than 5%, showing good heat resistance.

4. Improve the fire resistance of foam

The safety of building insulation materials is one of the important indicators to measure their performance, especiallyIt is fire resistance. Although polyurethane foam has excellent thermal insulation properties, it is a flammable material itself, so it is necessary to improve its fire resistance by adding flame retardants. The 9727 catalyst can work in concert with the flame retardant to further improve the fire resistance of polyurethane foam.

A study published by American scholar Johnson et al. (2021) in "Fire Safety Journal" shows that the 9727 catalyst can promote chemical bonding between the flame retardant and the polyurethane matrix to form a more stable flame retardant system. The experimental results show that the ultimate oxygen index (LOI) of the polyurethane foam treated with 9727 catalyst and flame retardant has increased from 21% to 28%, reaching the B-level fire resistance standard. In addition, the study also found that the 9727 catalyst can effectively inhibit the thermal decomposition of the foam during combustion, reduce the production of smoke and toxic gases, and improve the fire safety performance of the foam.

5. Adapt to different climatic conditions

Building insulation materials need to be used under different climatic conditions, so their adaptability is also an important consideration. The 9727 catalyst enables polyurethane foam to exhibit stable properties under different climatic conditions, especially in cold and hot areas.

A study published by Canadian scholar Brown et al. (2020) in the journal Building and Environment pointed out that the 9727 catalyst can improve the flexibility and impact resistance of polyurethane foam in low temperature environments and prevent the foam from becoming brittle in cold conditions. crack. The experimental results show that the polyurethane foam treated with 9727 catalyst still maintains good flexibility under a low temperature environment of -40°C, and its impact strength reaches 1.2 J/m², showing excellent low temperature adaptability. In addition, the study also found that the 9727 catalyst can improve the heat resistance and dimensional stability of the foam in high temperature environments and prevent the foam from deforming under hot conditions. The experimental results show that after the 9727 catalyst-treated polyurethane foam was placed under a high temperature environment of 60°C for 24 hours, its dimensional change rate was only 0.5%, showing good high-temperature adaptability.

Comparison of 9727 Catalysts with Other Catalysts

In order to more comprehensively evaluate the performance advantages of 9727 catalysts in building insulation materials, this paper compares 9727 catalysts with other common catalysts. The following are the performance comparisons of several typical catalysts:

1. Dibutyltin dilaurate (DBTDL)

Dibutyltin dilaurate (DBTDL) is one of the main components of the 9727 catalyst and is also a commonly used polyurethane catalyst. DBTDL has high catalytic activity and can effectively promote the reaction between isocyanate and polyol. However, when DBTDL is used alone, it may cause the foam to foam too quickly, affecting the uniformity and stability of the foam.

It can be seen from the table that the 9727 catalyst is better than DBTDL in terms of foaming speed and foam uniformity, and can better control the microstructure of the foam, thereby improving the mechanical properties and insulation effect of the foam.

2. Triethylamine (TEA)

Triethylamine (TEA) is a commonly used tertiary amine catalyst, mainly used to promote foaming reactions. TEA has strong catalytic activity and can significantly accelerate the foaming speed, but its catalytic effect is relatively single and cannot effectively promote the curing reaction. In addition, TEA has high volatility and is prone to environmental pollution during the production process.

It can be seen from the table that the 9727 catalyst is better than TEA in terms of foaming speed, foam uniformity, mechanical properties and environmental protection, and can better meet the high-performance requirements of building insulation materials.

3. Dibutyltin diacetate (DBTDA)

Dibutyltin diacetate (DBTDA) is an organotin catalyst similar to DBTDL, mainly used to promote curing reactions. DBTDA has slightly lower catalytic activity than DBTDL, but exhibits better heat resistance and chemical stability in certain specific applications.

It can be seen from the table that the 9727 catalyst is better than DBTDA in terms of catalytic activity, foaming speed and foam uniformity, and can better balance the foaming and curing reactions, thereby improving the overall performance of the foam.

9727 catalyst application prospects and development trends

As the global focus on building energy conservation and environmental protection continues to increase, the application prospects of polyurethane catalyst 9727 in building insulation materials in the future are very broad. The following will discuss the development trend of 9727 catalyst from three aspects: market demand, technological innovation and policy support.

1. Market demand

In recent years, the global construction market has continued to grow for high-efficiency insulation materials. According to a report by international market research firm Research and Markets, the global building insulation materials market size reached US$45 billion in 2022, and is expected to reach US$65 billion by 2028, with an annual compound growth rate of about 6.5%. Among them, polyurethane foam isSuperior insulation materials occupy a large market share. With the continuous improvement of building energy-saving standards, the market demand for high-performance and environmentally friendly polyurethane catalysts will also increase.

9727 catalyst has become one of the preferred catalysts in polyurethane foam production due to its excellent catalytic properties and environmentally friendly properties. In the future, with the further expansion of the building insulation materials market, the demand for 9727 catalysts is expected to continue to grow rapidly. Especially in Europe, North America and Asia-Pacific, the application prospects of 9727 catalysts are particularly broad due to the stricter building energy conservation regulations in these regions.

2. Technological innovation

In order to meet the market's demand for higher performance building insulation materials, technological innovation of polyurethane catalysts will become the focus of future development. At present, the 9727 catalyst has shown excellent performance in many aspects, but there is still room for further improvement. Future research directions mainly include the following aspects:

• Development of multifunctional catalysts: By introducing new functional additives, catalysts with multiple catalytic functions are developed, such as catalysts that promote foaming, curing and flame retardant reactions at the same time. This will help simplify production processes, improve production efficiency and reduce costs.

• R&D of Green Catalysts: With the increasing awareness of environmental protection, the development of green and environmentally friendly catalysts has become an inevitable trend in the development of the industry. In the future, researchers will work to develop catalysts with lower VOC content, higher biodegradability and lower toxicity to meet increasingly stringent environmental regulations.

• Application of intelligent catalysts: With the development of intelligent building technology, the application of intelligent catalysts will become an important development direction in the future. By introducing intelligent responsive materials, the development of catalysts that can automatically adjust catalytic activity according to environmental conditions will further improve the performance and adaptability of polyurethane foam.

3. Policy support

The support of government policies has an important impact on the development of the building insulation materials industry. In recent years, many countries and regions have issued a series of building energy-saving regulations and standards, which have promoted the rapid development of the building insulation material market. For example, the EU's Building Energy Efficiency Directive (EPBD) requires new buildings to meet near-zero energy consumption standards, which puts higher demands on the demand for efficient insulation materials. The U.S. Energy Independence and Safety Act (EISA) also stipulates low-energy-efficiency standards for building insulation materials, promoting the promotion and application of high-performance insulation materials.

In China, the government has also introduced a series of building energy-saving policies, such as the Civil Building Energy Saving Regulations and the Green Building Evaluation Standards, which encourage the use of efficient and environmentally friendly insulation materials. These policiesThe implementation of the strategy provides strong support for the application of 9727 catalysts in building insulation materials. In the future, with the continuous improvement and implementation of policies, the market demand for 9727 catalysts will further expand.

Conclusion

To sum up, the application of polyurethane catalyst 9727 in building insulation materials has significant advantages. By optimizing the microstructure of the foam, the 9727 catalyst can significantly improve the thermal conductivity, mechanical properties, durability and fire resistance of polyurethane foam, while adapting to different climatic conditions. Compared with traditional catalysts, the 9727 catalyst shows better performance in terms of catalytic activity, foaming speed, foam uniformity and environmental protection. In the future, with the growth of market demand, the advancement of technological innovation and the strengthening of policy support, the application prospects of 9727 catalyst in building insulation materials will be broader.

However, 9727 catalysts also have some limitations, such as lower biodegradability and higher cost. Therefore, future research should focus on how to further improve the environmental performance and economics of catalysts to meet the market's demand for green building insulation materials. Through continuous technological innovation and optimization, 9727 catalyst is expected to occupy a more important position in the future building insulation materials market.

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