Flex Pu Catalyst Plays An Important Role in Polyurethane Products

flex pu catalyst are the accelerators of many chemical reactions. Catalyst is an important additive to synthetic resin, and polyurethane is no exception. flex pu catalyst can shorten reaction time, improve production efficiency, selectively promote positive reaction and inhibit side reaction. In the production of many polyurethane products, catalyst is a commonly used additive, although the amount is small, the effect is great.
Although a small number of inorganic compounds, organophosphorus oxygen compounds can be used as flex pu catalysts, but the use of convenient, in the synthesis of polyurethane and its raw materials commonly used catalysts are mainly tertiary amine catalysts (including its quaternary ammonium salts) and organometallic compounds two categories.
Tertiary amine catalysts can be mainly divided into fatty amines, alicyclic amines, aromatic amines, alcohol amines and their ammonium salt compounds. Aliphatic amine catalysts include N, n-dimethylcyclohexamine, bis (2-dimethylaminoethyl) ether, triethylenediamine,N,N,N',N' -tetramethylalkylenediamine,N,N,N',N "-pentamethyldiethylenediamine, triethylamine,N, n-dimethylbenzylamine,N, n-dimethyl cetylamine,N, n-dimethylbutadiamine, etc.
Alcohol amine catalysts are triethanolamine,N,N- dimethyl ethanolamine and so on. Alcohol is a kind of reactive catalyst which can be used in combination with other highly active catalysts. Triethanolamine is also a crosslinking agent for molding foams.
The results show that (dimethylaminoethyl) ether (A-1) has high catalytic activity, and its reaction rate constant is 50% higher than that of triethylenediamine. In the activity comparison test of flex pu catalyst, the kinetic data of alcohol-isocyanate reaction were studied by using butanol-phenylisocyanate model reaction system, and the kinetics of water-isocyanate reaction was studied by using water and phenylisocyanate model reaction system. The solvent was toluene - dimethylformamide (90/10) at 25℃, and the same amount of stannous caprilate was added to each system.