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US 4,539,339 AGranted
Polyurethane foams made from vinyl polymer polyols
AssigneeTexaco Inc.
InventorsMichael Cuscurida, Ernest L. Yeakey, Bruce W. Peterson
Life of this patent
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Abstract
Polyurethane foams employing vinyl polymer polyols made by polymerizing in situ via a free-radical mechanism one or more vinyl monomers in an epoxy resin-modified polyol are described. Preferably, styrene and acrylonitrile are copolymerized in a polyol made by adding epoxy resin to the alkoxylation of a polyol initiator having 3 to 4 hydroxyl groups. The vinyl polymer polyols of this invention give flexible polyurethane foams with greater load-bearing properties.
Claims14
A polyurethane foam being produced by the process comprising
- reacting a vinyl polymer polyol together with an organic polyisocyanate in the presence of a polyurethane catalyst and optionally in the presence of a blowing agent,
- wherein the vinyl polymer polyol is prepared by the process comprising polymerizing via a free radical reaction a monomer component consisting of at least one vinyl monomer in the presence of an epoxy resin-modified polyol.
A method for making a polyurethane foam comprising
- (a) polymerizing via a free radical reaction a monomer component consisting of at least one vinyl monomer in the presence of an epoxy resin-modified polyol to give a vinyl polymer polyol and
- (b) reacting the vinyl polymer polyol of step (a) together with an organic polyisocyanate in the presence of a polyurethane catalyst and optionally in the presence of a blowing agent.
Dependencies are inferred from the claim text.