Polyurethane (PU) is a high-performance polymer material and is widely used in many fields such as construction, automobile, furniture, home appliances, and textiles. Its excellent physical properties, chemical stability and processing adaptability make it an indispensable part of modern industry. However, catalysts and solvents used in traditional polyurethane production processes often contain volatile organic compounds (VOCs), which pose potential harm to the environment and human health. Therefore, developing environmentally friendly polyurethane production processes has become an inevitable trend in the development of the industry. <\/p>\n
In this context, the polyurethane catalyst 9727 came into being. As an efficient and environmentally friendly catalyst, 9727 can not only significantly improve the reaction rate and product quality of polyurethane, but also effectively reduce the emission of harmful substances in the production process. This article will conduct in-depth discussion on the combination of polyurethane catalyst 9727 and environmentally friendly production processes, analyze its advantages in different application fields, and quote relevant domestic and foreign literature to provide readers with a comprehensive technical reference. <\/p>\n
Polyurethane catalyst 9727 is a highly efficient catalyst based on organometallic compounds, with its main component being bismuth salt (Bismuth Salt). As the core component of the catalyst, bismuth salt has good catalytic activity and selectivity, and can promote the reaction between isocyanate and polyol at lower temperatures to form polyurethane. Compared with traditional tin- or lead-based catalysts, the 9727 catalyst has the following significant advantages:<\/p>\n
With the increasing global environmental awareness, traditional polyurethane production processes face increasingly stringent environmental protection requirements. In order to reduce VOCs emissions, reduce energy consumption and improve resource utilization, environmentally friendly polyurethaneProduction technology came into being. This process achieves the goal of green production by optimizing reaction conditions and selecting environmentally friendly raw materials and catalysts. Specifically, the production process of environmentally friendly polyurethane mainly includes the following aspects:<\/p>\n
Waterborne Polyurethane (WPU) is an environmentally friendly polyurethane material that has developed rapidly in recent years, and is widely used in coatings, adhesives, textiles and other fields. Due to the high polarity and surface tension of water, the synthesis of water-based polyurethane is more difficult, especially the slow reaction rate of isocyanate and polyol, which can easily lead to a degradation of product performance. To this end, it is crucial to choose the right catalyst. <\/p>\n
9727 The application effect of catalyst in aqueous polyurethane is significant. Research shows that the 9727 catalyst can promote the reaction between isocyanate and polyol at lower temperatures, shorten the reaction time, and improve the crosslinking density and mechanical properties of the product. In addition, the 9727 catalyst also has good water solubility and dispersion, and can be evenly distributed in the aqueous system, avoiding local overheating and side reactions. <\/p>\n
Table 1 shows the performance comparison of 9727 catalysts and traditional catalysts in aqueous polyurethane synthesis:<\/p>\n
| parameters<\/th>\n | 9727 Catalyst<\/th>\n | Traditional catalyst<\/th>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Reaction temperature (\u2103)<\/td>\n | 60-80<\/td>\n | 80-100<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reaction time (min)<\/td>\n | 30-60<\/td>\n | 60-120<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Crosslinking density (%)<\/td>\n | 85-90<\/td>\n | 70-75<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mechanical Properties (MPa)<\/td>\n | 15-20<\/td>\n | 10-15<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| VOCs emissions (g\/L)<\/td>\n | <10<\/td>\n | >50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n It can be seen from Table 1 that the 9727 catalyst exhibits higher catalytic efficiency and better product performance in aqueous polyurethane synthesis, while significantly reducing VOCs emissions and meeting environmental protection requirements. <\/p>\n 2. Application in solvent-free polyurethane<\/h4>\nSolvent-Free Polyurethane (SFPU) is another important environmentally friendly polyurethane material, which is widely used in furniture, home appliances, automobiles and other fields. Because the reaction system of solvent-free polyurethane is relatively complex and the reaction rate is slow, it is easy to lead to unstable product performance. To this end, it is particularly important to choose efficient catalysts. <\/p>\n 9727 The application effect of the 9727 catalyst in solvent-free polyurethane is also significant. Research shows that the 9727 catalyst can promote the reaction between isocyanate and polyol at lower temperatures, shorten the reaction time, and improve the crosslinking density and mechanical properties of the product. In addition, the 9727 catalyst also has good thermal stability and chemical stability, which can avoid side reactions and ensure the purity and quality of the product. <\/p>\n Table 2 shows the performance comparison of 9727 catalysts and traditional catalysts in solvent-free polyurethane synthesis:<\/p>\n
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