Abstract: 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.

Abstract: The present invention relates to low-halogen-content, thermoplastically-processible polyurethane elastomers (TPU), to which are added antimony trioxide, chlorinated and/or brominated aromatic compounds having a specified halogen content, aluminum hydroxide having a specified particle size, phosphoric acid tris-ester, and, optionally, quaternary tetra-alkyl ammonium salts. These additives impart an unexpectedly favorable combination of electrical surface properties, flameproof behavior and abrasion resistance.

Abstract: 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.