What Is The Classification Of Polyurethane Catalysts

Polyurethane catalyst is an auxiliary agent that accelerates the reaction of polyurethane.
The commonly used catalysts in the synthesis of polyurethane and its raw materials mainly include tertiary amine catalysts and organometallic compounds. There are many varieties of tertiary amines and organometallic compounds, and considering various factors, only over twenty 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' - tetramethylalkylenediamine, triethylamine, N, N-dimethylbenzylamine, etc.
Alicyclic amine catalysts include solid amine, N-ethylmorpholine, N-methylmorpholine, N, N '- diethylpiperazine, etc.
Alcoholic compound catalysts include triethanolamine, DMEA, etc.
Aromatic amines include pyridine, N, N '- dimethylpyridine, etc.
Organic metal catalysts
Among the formulations of polyurethane elastomers, adhesives, coatings, sealants, waterproof coatings, paving materials, etc., organic metal catalysts such as dibutyltin dilaurate (DY-12) are the most commonly used. They are very effective in promoting the reaction of isocyanate groups and hydroxyl groups, but they also have a certain acceleration effect on the reaction between water and isocyanate in aqueous formulations; Special catalysts such as organic lead can be used in formulas such as plastic tracks.
Organic metal compounds include carboxylates, metal alkyl compounds, etc. The metal elements they contain mainly include tin, potassium, lead, mercury, zinc, etc. The most commonly used are organic tin compounds.