Bayer Aktiengesellschaft

Paul T Henrichs

Peter Haas

Hans-Georg Hoppe

Wolfgang Grimm

Hans-Dieter Ruprecht

Hans Dieter Ruprecht

The present invention is directed to a process for the production of waterproof, fine-cell polyurethane elastomers having a density of about 300 to 800 kg/m.sup.3 by reacting

Process for the production of polysiloxane ionomers, polysiloxane

The present invention relates to moldings, particularly in the form of cushioning elements, of at least partly open-cell polyurethane elastomers which have a substantially homogeneous density profile and a density of from 0.3 to 0.8 g/cc and which are characterized in that their surface is sealed by a continuous, tight, nonporous skin of polyurethane or polyurethane urea having a thickness of from 0.05 to 1 mm, preferably from 0.1 to 0.5 mm and, with particular preference, from 0.2 to 0.3 mm.

Surface-sealed moldings of cellular polyurethane elastomers and a

This invention relates to an improved method of producing impermeable cellular polyurethane elastomers from polyisocyanates, relatively high molecular weight polyhydroxyl compounds and water as chain lengthening and blowing agent to which additional chain lengthening agents may be added and it is characterized by the use of certain silicone derivatives. The new method makes it possible for impermeable cellular molded articles to be produced without the necessity of forming a skin on the surface, of the kind known, for example, in integral skin foams.

Impermeable molded articles of cellular polyurethane elastomers produced

This invention relates to a process for the production of elastic composites, preferably used as floor coverings, from plastics granulates and polyisocyanates acting as binders. The process broadly comprises coating the plastic granulates with a paste of hydroxyl containing polyether, filler, and optionally pigment, subsequently mixing the coated granulates with the polyisocyanate binder, and thereafter molding and curing the resultant composite.

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Bergisch Gladbach, Germany

Paul T Henrichs