Classification of polyurethane 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 amines and organometallic compounds. Considering various factors, only more than 20 are most commonly used in polyurethane production.
Amine catalyst
Amine catalysts are generally used in the production of polyurethane foam and are mainly divided into the following categories:
Aliphatic amine catalysts include N,N-dimethylcyclohexylamine, bis(2-dimethylaminoethyl) ether, N,N,N',N'-tetramethylalkylenediamine, triethyl amine, N,N-dimethylbenzylamine, etc.
Alicyclic amine catalysts include solid amine, N-ethylmorpholine, N-methylmorpholine, N,N'-diethylpiperazine, etc.
Alcohol compound catalysts include triethanolamine, DMEA and the like.
Aromatic amines include pyridine, N,N'-lutidine and the like.
Organometallic catalysts
In the formulations of polyurethane elastomers and adhesives, coatings, sealants, waterproof coatings, paving materials, etc., organometallic catalysts such as dibutyltin dilaurate (DY-12) are the most commonly used, which promote the reaction between isocyanate groups and hydroxyl groups. It is very effective, but it also has a certain acceleration effect on the reaction of water and isocyanate in formulas with moisture; special catalysts such as organic lead can be used in formulas such as plastic runways.
Organometallic compounds include carboxylates, metal alkyl compounds, etc. The metal elements contained mainly include tin, potassium, lead, mercury, zinc, etc., and the most commonly used are organotin compounds.

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Physical and chemical properties of amides

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Physical and chemical properties of amides

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