Abstract: The present invention describes a process for producing flame-retardant polyurethane foams. The process of the invention includes the use of hyperbranched, nitrogen-containing polymers for providing flame retardancy to polyurethane foams. The amounts used of the hyperbranched compounds are preferably from 5 to 20% by weight, based on the polyol component. The N content of preferred nitrogen-containing compounds is at least 2% by weight. The N content of the polyurethane foams of the invention is from 1 to 8% by weight from the hyperbranched polymer. Compounds in particular used are hyper-branched polyureas, hyperbranched polyamides, and in particular hyperbranched polylysines, hyperbranched polyisocyanurates, and hyperbranched polyesteramides. An advantage of the use of the compounds of the invention is that the polyurethane foams can be rendered flame-retardant without the use of, or by using markedly reduced amounts of, halogen-containing flame retardants.

Abstract: The present invention relates to a composite comprising an elastic polyurethane molding with compact surface and with cellular core and rubber, capable of production via introduction of a reaction mixture, obtainable via mixing of (a) organic polyisocyanates with (b) at least one compound having at least two reactive hydrogen atoms, (c) chain extenders and/or crosslinking agents, (d) blowing agents, (e) catalysts, (f) hyperbranched polymers, and (g) if appropriate, other auxiliaries and/or additives, into a mold, comprising rubber, and also to a process for production of these composite materials, and to the use of these composite materials as shoe soles.

Abstract: High-functionality, highly branched and high-functionality, hyperbranched polymers based on polyisobutene derivatives and a process for their preparation