Catalysts and compositions for foaming polyurethane and foaming method and application of catalysts and compositions for foaming polyurethane

Abstract

The invention provides catalysts and compositions for foaming polyurethane and a foaming method and application of the catalysts and compositions for foaming polyurethane. The catalysts for foaming polyurethane include methylcyclohexylamine and at least two selected from N-methylhomopiperazine, 1,2-dimethylimidazole, dimethylaminoethyl methacrylate, 3-(methacryloyloxy) propyl trimethoxysilane andN-butylbenzenesulfonamide. The catalysts for foaming polyurethane has good thermal stability and a mild rate of catalytic cross-linking curing, can be grafted to a resin matrix network structure, anddo not volatilize easily in a heating environment, so that crossing and curing of the compositions, which contain the catalysts, for foaming polyurethane are conducted completely, the network structure has a dense degree of cross-linking, and the probability of monomer residual is reduced greatly; in addition, the amount of addition of the catalysts is less, so that the aging resistance, yellowingresistance and thermal insulation performance of the polyurethane foam are improved, volatilization of odorous gas in a medium-high temperature environment is reduced, and the odor index of the polyurethane foam is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a catalyst for polyurethane foaming, a polyurethane foaming composition and a foaming method and application thereof. Background technique [0002] At present, polyurethane foam is widely used in low temperature insulation materials, but in the application environment of medium and high temperature, the heat aging resistance and odor problems of foam are particularly prominent. For example, the insulation layer made of foaming agent used in disinfection cabinets has poor temperature and aging resistance, and the foam material has poor heat insulation effect. Long-term use will produce a lot of odor, and the long-term aging foam will turn yellow seriously and lose powder. And after a period of normal aging, it will become more brittle. [0003] Therefore, the related technology of existing polyurethane foam still needs to be improved. Contents of the invention [0004] The p...

AI Technical Summary

Problems solved by technology

For example, the insulation layer made of foaming agent used in disinfection cabinets has poor temperature and aging resistance, and the foam material has poor heat insulation effect. Long-term use will produce a lot of odor, and the long-term aging foam will turn yellow seriously and lose powder. And after a period of normal aging, it will become more brittle

[0003] Therefore, the relevant technology of existing polyurethane foam still needs to be improved

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