Dihydroxyfatty acids as structural elements for polyurethanes
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsWolfgang Klauck, Peter Daute
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Abstract
A process for the production of carboxyfunctional polyurethane from dihydroxyfatty acids and/or dihydroxypolyfatty acids as isocyanate-reactive compounds bearing an ionizable group is provided. The dihydroxycarboxylic acids and/or dihydroxypolyfatty acids have no shielding molecular group near the carboxy group, more particularly not in the alpha-position to the carboxy group, and thus give particularly good results when used as a structural element for the production of polyurethanes. Also provided are polyurethanes and aqueous polyurethane dispersions produced using the dihydroxyfatty acids.
Claims21
A process for the production of carboxyfunctional polyurethanes, said process comprising:
- reacting a mixture comprising;
- a) an isocyanate component that is on average polyfunctional,
- b) a polyol component that is on average polyfunctional,
- c) a dihydroxyfatty acid component formed by ring opening of an epoxidized fatty acid containing 8 to 36 carbon atoms, for introducing ionizable carboxy function, said dihydroxyfatty acid component comprised of at least one dihydroxyfatty acid compound selected from the group consisting of dihydroxyfatty acids and dihydroxypolyfatty acids, wherein said dihydroxyfatty acid compound is free of substitution for a hydrogen on a carbon atom alpha to the carboxyl group and forms a homogenous single phase system with the polyol component.
Dependencies are inferred from the claim text.