Basf Aktiengesellschaft

Hansjuergen Kessler

Georg Falkenstein

Eckhard Ropte

Uwe Hartwig

A process for the preparation of a hard foam containing urethane groups or containing urethane and isocyanurate groups involves reacting

Preparation of hard foams containing urethane groups or containing

This invention relates to an urethane group containing polyisocyanurate foam produced from a polyisocyanate and a polyhydroxy compound, wherein the polyhydroxy compound is the reaction mixture of a hydroxyl group containing amine which is at least difunctional and is selected from the group consisting of a secondary amine, a tertiary amine, and a mixture thereof, and a naphthenic acid, or a mixture of said reaction mixture and a conventional polyol, the reaction conditions are a temperature between 0.degree. C. and 150.degree. C. and an amino equivalent to carboxylic equivalent of 0.3:1 to 50:1.

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Mannheim, Germany

Hansjuergen Kessler