Silicon polyether block copolymers with high-molecular polyether esters and use of same as stabilisers for production of polyurethane foams

摘要

Silicone polyether block copolymer comprising a polyorganosiloxane having at least one polyether with a weight average molecular weight of >= 5000 g/mole, a and polyether with a weight average molecular weight of greater than 3000 g/mole chemically bonded at the polyorganosiloxane, is claimed. Independent claims are also included for: (1) preparing the silicone polyether block copolymer comprising reacting branched or linear polyorganosiloxane having terminal and/or lateral silicon-hydrogen functions, with a polyether or a polyether mixture of at least two polyethers; (2) a composition comprising at least one silicone-polyether copolymers, at least one substance used in the manufacture of polyurethane foams, where the substance comprises nucleating agents, cell refining additives, cell openers, crosslinking agents, chain extenders emulsifiers, flame retardants, antioxidants, UV stabilizers, antistatic agents, biocides, color pastes, solid fillers, amine catalysts, metal catalysts or buffer substances; (3) a polyurethane foam obtained by using the silicone polyether block copolymer; and (4) an article comprising a polyurethane foam.