The Development History Of Polyurethane Catalysts

The development history of polyurethane catalysts can be traced back to the early 20th century. The following are the main development stages and important milestones of polyurethane catalysts:
1. Initial research (1930s to 1950s): In the 1930s to 1940s, researchers began to explore the preparation methods of polyurethane. Initially, metal salt catalysts such as tin chloride and cobalt chloride were used for the synthesis of polyurethane. However, these catalysts have low activity and are not environmentally friendly.
2. Dicarboxylate catalyst (1960s to 1970s): In the 1960s, researchers developed new catalysts, such as the Dicarboxylate (DMA) catalyst. DMA catalyst can promote the formation of polyurethane and increase the polymerization reaction rate. The introduction of this catalyst has made the industrial production of polyurethane more cost-effective and efficient.
3. Organic tin catalysts (1980s): In the 1980s, organic tin catalysts became an important breakthrough in the preparation of polyurethane. For example, the combination of imino compounds and organotin catalysts is widely used in the preparation of polyurethane foam. Organic tin catalysts exhibit high catalytic activity and selectivity in polyurethane synthesis.
4. Lead free catalysts (1990s present): In order to reduce adverse effects on the environment, researchers have begun to search for lead-free catalysts to replace organic tin catalysts. In response to this goal, many lead-free catalysts have been developed, including amino acid salts, organic base salts, and organic bismuth compounds. These lead-free catalysts exhibit good catalytic activity and environmental friendliness in polyurethane synthesis.
5. Optimization of catalyst performance: With the increasing demand for polyurethane applications, researchers are committed to improving the performance of catalysts. They conducted in-depth research on the activity, selectivity, stability, and durability of the catalyst, and improved its performance through structural optimization and functional improvement.
6. Expansion of application fields: With the widespread application of polyurethane, the application fields of polyurethane catalysts are also constantly expanding. Polyurethane catalysts are widely used to prepare polyurethane foam, elastomer, coatings, adhesives, sealants, fibers and various plastic products. The development and optimization of catalysts enable polyurethane materials to meet the performance and quality requirements of different application fields.
7. Environmentally Friendly Catalysts: In recent years, with increasing attention to environmental protection and sustainable development, researchers have been committed to developing more environmentally friendly polyurethane catalysts. These catalysts do not contain harmful metal or organic tin components and can achieve efficient catalytic effects in the polyurethane synthesis process. This trend will continue to drive the development of polyurethane catalysts to meet the requirements of sustainability and green manufacturing.
It should be noted that the development of polyurethane catalysts is a continuous process. With the progress of science and technology and changes in demand, we can look forward to the emergence of more new catalysts to promote the continuous innovation and development of polyurethane preparation technology.