Tertiary amine catalysts are a type of polyurethane catalysts, which can be mainly divided into fatty amines, lipid Cyclic amines, aromatic amines, alcohol amines and their ammonium salts.
Aliphatic amine catalysts include N,N-dimethylcyclohexylamine, bis(2-dimethylaminoethyl) ether, triethylenediamine, N,N,N ‘,N’-tetramethylalkylenediamine, N,N,N’,N”-pentamethyldiethylenetriamine, triethylamine, N,N-dimethylbenzylamine, N , N-dimethylhexadecylamine, N,N-dimethylbutylamine, etc.
Alicyclic amines include triethylenediamine, N-ethylmorpholine, N-methylmorpholine, N,N’-diamine Ethylpiperazine, N,N’-diethyl-2-methylpiperazine, N,N’-bis-(α-hydroxypropyl)-2-methylpiperazine, N-2-hydroxypropyl Dimethylmorpholine etc.
Alcoholamine compound catalysts include triethanolamine, N,N-dimethylethanolamine, etc. Alcohol catalyst is a type of reactive catalyst that can be used in conjunction with other highly active catalysts. Triethanolamine is also a cross-linking agent for molded foams.
Aromatic amines include pyridine, N,N’-dimethylpyridine, etc.
Research data show that (dimethylaminoethyl) ether (A-I) has high catalytic activity, and its reaction rate constant is higher than triethylenediamine 50% higher. In the activity comparison test of the catalyst, the butanol-phenyl isocyanate model reaction system was used to study the alcohol-isocyanate reaction kinetic data, and the water and phenyl isocyanate model reaction system was used to study the water-isocyanate reaction kinetics. The solvent was 25. C toluene-dimethylformamide (90/10), add an equal amount of stannous octoate to each system.
Polyurethane CatalystSmall Friendly reminder: Many amine compounds have pungent smells and are irritating to the skin and eyes. Some heavy metal compounds are highly toxic. Therefore, personal protection should be paid attention to when using them. If they accidentally splash on the skin, wash them with soap. , rinse with clean water and seek medical help if necessary.
