Process for the preparation of composite bodies

Details Process for the preparation of composite bodies Process for the preparation of composite bodies

C - Chemistry, Metallurgy

08

G

C08G 18/48 (2006.01) C08G 18/22 (2006.01) B29C 67/22 (1990.01)

Patent

CA 2135289

2135289 9325597 PCTABS00028 A process for making composites by coating the reverse of a plastic film as the top layer with a reaction mixture reacting to form a soft or semi-hard polyurethane foam consisting essentially of a polyisocyanate component, a polyol component, at least one blowing agent, catalysts and possibly other auxiliaries and additives, in which reaction products in alkaline salt form of (i) at least trivalent alcohols in the molecular weight range from 92 to 1,000 and (ii) intramolecular carboxylic acid anhydrides having a statistical mean per molecule of at least 2 alcoholic hydroxyl groups and at least 0.5 alkaline carboxylate groups are used as catalysts, and composites made by this process.

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