Process for the production of polyurethane foams

Details Process for the production of polyurethane foams Process for the production of polyurethane foams

Category

C - Chemistry, Metallurgy

Subcategory

08

Subsubcategory

G

IPC codes

C08G 18/62 (2006.01) B32B 5/18 (2006.01) C08G 18/22 (2006.01) C08G 18/34 (2006.01) C08G 18/67 (2006.01)

Type

Patent

Patent number

CA 2106947

Description

A PROCESS FOR THE PRODUCTION OF POLYURETHANE FOAMS ABSTRACT OF THE DISCLOSURE A process for the production of polyurethane foams by reacting a reaction mixture consisting essentially of a) a polyisocyanate component, with b) a polyol component free from salt groups, in the presence of c) at least one blowing agent, d) salts of ester-functional .alpha.,.beta.-unsaturated carboxylic acids and, optionally, e) other auxiliaries and additives typically used in polyurethane chemistry. Component d) the salts of ester-functional .alpha.,.beta.-unsaturated carboxylic acids are the reaction products of (i) monohydric or polyhydric alcohols, with (ii) unsaturated dicarboxylic acids or unsaturated dicarboxylic anhydrides, which contain on a statistical average at least one alkali metal carboxylate group and at most 0.5 alcoholic hydroxyl groups per molecule. The present invention also relates to the composites produced by back-foaming of a plastic film as a surface layer wherein the foam is produced by the process described above.

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