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US 5,514,723 AGranted
Water-blown integral skin polyurethane foams and catalysts useful therein
AssigneeBayer Aktiengesellschaft
InventorsEdmund J. Madaj, Kurt E. Walter
Life of this patent
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Abstract
The present invention is directed to an integral skin foam prepared by reacting an isocyanate, an isocyanate reactive component and water as the only blowing agent and to a catalyst useful therein. The catalyst broadly comprises a diorganotin sulfide, a tertiary amine and a tin compound other than a diorganotin sulfide.
Claims4
In a process for the preparation of an integral skin foam by reacting an organic isocyanate with an active hydrogen group containing material in the presence of a catalyst and water as the blowing agent in a closed mold, the improvement of said catalyst comprises:
- a) from about 4 to about 82% by weight of a diorganotin sulfide of the formula:
- R.sup.1 R.sup.2 SnS!.sub.x
- where R.sup.1 and R.sup.2, can be the same or different and are individually selected from the group consisting of alkyl containing from 1 to 20 carbon atoms, cycloalkyl, aryl, aralkyl, and alkaryl, and x is an integer of from 1 to 4,
- b) from about 14 to about 94% by weight of a tertiary amine, and
- c) from about 4 to about 25% by weight of a tin compound capable of catalyzing the reaction between an isocyanate group and an active hydrogen atom, with the proviso that said tin compound is not a diorganotin sulfide of the above noted formula, and with further proviso that the amounts of components a), b) and c) total 100%.
2 more elements
Dependencies are inferred from the claim text.