Bayer Aktiengesellschaft

Bruno Luckas

Otto Ganster

Alfred Neuhaus

Hanns-Peter Muller

Ulrich Knipp

Helmut Kleimann

Heinz-Georg Schneider

Gezar Avar

A process for the production of composite bodies of polyurethane foams and covering layers, which includes at least partly lining a mold with a covering layer, and filling the mold with a reaction mixture which reacts to form a polyurethane foam. The reaction mixture which forms a polyurethane foam consists of a polyisocyanate component, a component consisting of at least one organic compound having at least two isocyanate reactive groups, blowing agents, and salts with water of crystallization as additives for improving the bond between the foam and the covering layer.

Process for the production of composite bodies having enhanced bonding

The present invention relates to reactive systems comprising

Reactive systems and a process for the preparation of polyurethane

The present invention is directed to a process for the preparation of molded polyurethane articles having densities of about 0.8 to 1.4 g/cm.sup.3 and a flex moduli according to DIN 53,457 of at least about 1800 N/mm.sup.2 by reacting according to the technique of reaction injection molding

Process for the production of molded polyurethane bodies

The present invention is directed to a process for the production of a molded article having a compact surface layer and a gross density above 900 kg/m.sup.3 via the reaction injection molding technique, comprising introducing a reaction mixture into a closed mold, said reaction mixture comprising:

Process for the production of molded articles having integral skin

This invention relates to a process for the production of polyurethane foams in closed molds using mixtures of organic polyisocyanates with certain compounds which liberate carbon dioxide under the catalytic influence of basic compounds. In this process a mixture of polyisocyanates and compounds which liberate carbon dioxide under the catalytic influence of basic compounds is reacted with organic compounds containing hydrogen atoms which are reactive with isocyanate groups, which organic compounds are mixed with basic compounds and/or have basic compounds chemically built into them. The process is suitable for the production of any polyurethane foams in a closed mold, but is preferably applied to the production of semi-hard and particularly of hard polyurethane foams having a dense outer skin.

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Leverkusen, Germany

Bruno Luckas