History Of Flex Pu Catalysts

Polyurethane is a common polymer, it has a variety of excellent properties, such as wear resistance, acid and alkali resistance, good weather resistance. The catalyst in polyurethane plays an important role in the polymerization reaction, which can accelerate the polymerization and improve the synthesis efficiency and product quality. Let's take a look at the history of flex pu catalyst.
As early as the 1950s, the synthesis of polyurethane has begun to use lead chloride, zinc chloride and other inorganic catalysts, but these catalysts have high toxicity, harsh process conditions and other shortcomings, gradually replaced by organic catalysts. In the early 1960s, metalate catalysts and their complexes were widely used in the production of polyurethane, such as tin catalyst, lead catalyst, zinc catalyst, etc. These catalysts have the advantages of high activity and strong action, but there are some problems such as residual catalyst and harmful to human health.
Since the 1970s, with the increasing awareness of environmental protection, relatively environmentally friendly organic catalysts have been gradually paid attention to and applied. L-carbonic anhydride and its derivatives, Langmuir catalyst and amine catalyst have become the main organic catalysts in the synthesis of polyurethane. These catalysts have the advantages of high activity, high catalytic efficiency and small residual amount, but they also have the disadvantages of short catalyst life and high cost.
In recent years, organometallic catalysts, such as cobalt catalyst, iron catalyst and nylon catalyst, have gradually become one of the main catalysts for polyurethane synthesis. This kind of catalyst has the advantages of high catalytic efficiency, fast catalytic reaction speed and high product purity, but there are also some problems such as complex synthesis process conditions and expensive catalyst price.