Patent ID: 6228899
Filing Date: 2001-05-08
Classification: B60N,C08G

Abstract:
A process for producing flexible foams based on polyisocyanate polyaddition products comprising reacting polyisocyanates with compounds which are reactive toward isocyanates in the presence of catalysts, blowing agents, and optionally, flame retardants, auxiliaries and/or additives, wherein the compounds reactive toward isocyanates comprise polyether polyalcohols (c) which are obtained by reacting, in a first stage, at least one substance (a) containing 2 or 3 active hydrogens with at least one alkylene oxide in the presence or absence of catalysts, subsequently adding at least one substance (b) which contains at least four active hydrogens and, optionally, further catalyst to the reaction mixture from the first stage, and reacting the mixture in a second stage with at least one alkylene oxide.