Modification of amino polyols with epoxy resins
AssigneeTexaco Inc.
InventorsMichael Cuscurida, Neal J. Grice, George P. Speranza
Life of this patent
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Abstract
The modification of rigid amino polyols by their reaction with epoxy resin and alkylene oxides is described. The modified polyols produce rigid polyurethane foams that have higher heat distortion temperatures and better low temperature properties than foams made with nonmodified polyols. The viscosities of the epoxy resin-modified amino polyols are not significantly different than those of the prior art amino polyols although they are of a higher functionality.
Claims16
A modified amino polyol for use in preparing rigid polyurethane foams, the modified amino polyol being produced by the reaction of
- (a) a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four
- (b) an amine,
- (c) one or more alkylene oxides and
- (d) an epoxy resin.
A modified amino polyol for use in preparing rigid polyurethane foams, the modified amino polyol being produced by the reaction of
- (a) a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four selected from the group of initiators consisting of sucrose, sorbitol, methyl glucoside, starch glycosides and aliphatic or aromatic amines
- (b) an amine,
- (c) one or more alkylene oxides and
- (d) an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins and aliphatic epoxy resins
- in which the epoxy resin is reacted last and in which the ratio of the equivalent weight of intermediate polyol oxide adduct to the equivalent weight of epoxy is at least 2 to 1.
A method for the preparation of a modified amino polyol for use in preparing rigid polyurethane foams which comprises
- (a) mixing an amine with a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four,
- (b) reacting the resulting mixture with one or more alkylene oxides, and
- (c) reacting the alkoxy adduct with an epoxy resin.
A method for the preparation of a modified amino polyol for use in preparing rigid polyurethane foams which comprises
- (a) mixing an amine with a rigid foam polyol initiator having an active hydrogen functionality equal to or greater than four selected from the group of initiators consisting of sucrose, sorbitol, methyl glucoside, starch glycosides and aliphatic or aromatic amines,
- (b) reacting the resulting mixture with one or more alkylene oxides, and
- (c) reacting the alkoxy adduct with an epoxy resin selected from the group of epoxy resins consisting of the diglycidyl ether of Bisphenol A, epoxy novolak resins and aliphatic epoxy resins, such that the ratio of equivalent weight of intermediate polyol oxide adduct to the equivalent weight of epoxy is at least 2 to 1.
Dependencies are inferred from the claim text.