Manufacture of light-stable polyurethane integral foams

Details Manufacture of light-stable polyurethane integral foams Manufacture of light-stable polyurethane integral foams

1979-05-14

1981-03-17

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521124, 521125, 521126, 521127, 521129, C08G 1824, C08G 1820, C08G 1875, C08G 1877

Patent

active

042568412

ABSTRACT:
To prepare light-stable polyurethane integral skin foams, especially soft integral foams, aliphatic and/or cycloaliphatic polyisocyanates, both categories preferably containing urethane groups and/or biuret groups, are reacted with polyols in the presence of blowing agents and of a synergistic catalyst combination comprising an alkali metal hydroxide, alkali metal alcoholate, alkali metal phenolate, alkali metal salt of a weak acid and/or hexahydrotriazine derivative and an organic tin, zinc and/or iron(II) compound, in the presence or absence of assistants and adjuvants.
The preferred catalyst combination is tri-(dimethylaminopropyl)-s-hexahydrotriazine and dibutyl-tin dilaurate.

REFERENCES:
patent: 3476933 (1969-11-01), Mendelsohn
patent: 3726952 (1973-04-01), Boden et al.
patent: 3793268 (1974-02-01), Dietrich et al.
patent: 3799898 (1974-03-01), Lamplugh et al.
patent: 3824199 (1974-07-01), Nadeau et al.
patent: 3899454 (1975-08-01), Wagner et al.
patent: 4025466 (1977-05-01), Jourquin et al.
patent: 4058492 (1977-11-01), von Bonin et al.
patent: 4065410 (1977-12-01), Schaefer et al.
patent: 4150206 (1979-04-01), Jourquin et al.

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