The role of rigid pu catalysts

The catalysts commonly used in the synthesis of polyurethane and its raw materials mainly include tertiary amine catalysts and organometallic compounds.
There are many varieties of tertiary amine and organometallic compounds. Considering various factors, only more than 20 kinds are most commonly used in polyurethane production.
Amine catalyst
Amine catalysts are generally used in the production of polyurethane foam plastics, which are mainly divided into the following categories:
Aliphatic amine catalysts include N, n-dimethylcyclohexylamine, bis (2-dimethylaminoethyl) ether,N,N,N',N' -tetramethylalkyl diamine, triethylamine,N, n-dimethylbenzylamine, etc.
Alicyclic amine catalysts include solid amine, N-ethylmorpholine, N-methylmorpholine,N,N '-diethylpiperazine and so on.
Alcohol catalysts include triethanolamine, DMEA, etc.
Aromatic amines are pyridine,N,N '- dimethylpyridine and so on.
Organometallic catalyst
In polyurethane elastomers and adhesives, coatings, sealants, waterproof coatings, paving materials and other formulations, organometrical catalysts such as dibutyl tin dilaurate (DY-12) are the most commonly used, it is very effective in promoting the reaction of isocyanate group and hydroxyl group, but in the formula with moisture, the reaction of water and isocyanate also has a certain acceleration effect; Special catalysts such as organic lead can be used in formulations such as plastic track.