USE OF SILICONE-POLYETHER BLOCK COPOLYMERS WITH HIGH MOLECULAR WEIGHT NON-ENDCAPPED POLYETHER MOIETIES AS STABILIZERS FOR PRODUCTION OF LOW-DENSITY POLYURETHANE FOAMS

摘要

A process for production of polyurethane foams having a density of below 24.0 kg/m³ is provided. The process includes utilizing a silicone-polyether block copolymer comprising a polyorganosiloxane which includes at least one polyether moiety. The polyorganosiloxane has attached to it at least one non-endcapped polyether moiety having a molecular weight of not less than 4500 g/mol. Polyurethane foams and articles which are obtainable by the process of the present invention are also disclosed.