The commonly used catalysts in the synthesis of polyurethane and its raw materials mainly include amine catalysts and organometallic compounds. There are many varieties of amines and organometallic compounds. Taking into account various factors, there are only more than 20 types of polyurethane catalysts that are most commonly used.
Amine catalysts are generally used in the production of polyurethane foam and are mainly divided into the following categories:
(1) Aliphatic amine catalysts include N,N-dimethylcyclohexylamine, bis(2-dimethylaminoethyl)ether, N,N,N',N'-tetramethylalkylene diamine, Triethylamine, N,N-dimethylbenzylamine, etc.
(2) Alicyclic amine catalysts include solid amine, N-ethylmorpholine, N-methylmorpholine, N,N'-diethylpiperazine, etc.
(3) Alcohol compound catalysts include triethanolamine, DMEA, etc.
(4) Aromatic amines include pyridine, N,N'-lutidine and the like.
Among the formulas 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, which can promote the reaction of isocyanate groups and hydroxyl groups effectively. But it can also accelerate the reaction between water and isocyanate in formulas with moisture. And special catalysts such as organic lead can be used in formulas such as plastic tracks.
Organometallic compounds include carboxylates, metal alkyl compounds, etc. The main metal elements contained in them are tin, potassium, lead, mercury, zinc, etc., and organotin compounds are the most commonly used.
The polyurethane catalyst of WHAMINE is one of the most important additives for polyurethane foam. Different foam systems require different foaming and gel balances. In the production of polyurethane foam, catalysts play an important role. We strictly implement the batch inspection system, which is divided into raw material warehouse batch inspection and finished product storage batch inspection and production. Whether it is raw materials or finished products, we test every batch of products to ensure quality!