Biobased highly functional oligomers and thermosets therefrom
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United States of America Patent
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Sep 19, 2017
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Apr 21, 2016
filing date -
Apr 21, 2015
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Abstract
The invention relates to a polyfunctional bio-based oligomer which is the reaction product of a) at least one epoxidized sucrose fatty acid ester resin; b) at least one ethylenically unsaturated acid selected from methacrylic acid, acrylic acid, crotonic acid, and mixtures thereof; c) at least one acid anhydride selected from acetic acid anhydride, acrylic acid anhydride, methacrylic acid anhydride, crotonic acid anhydride, and mixtures thereof; d) optionally, at least one catalyst; and e) optionally, at least one inhibitor. In a polyfunctional bio-based oligomer of the invention, the ratio of ethylenically unsaturated acid to acid anhydride ranges from 90:1 to 1:90; at least one epoxide group of the at least one epoxidized sucrose fatty acid ester resin is esterified by at least one ethylenically unsaturated acid; and at least one epoxide group of the at least one epoxidized sucrose fatty acid ester resin is esterified by at least one acid anhydride. Other embodiments of the invention relate to methods of making the polyfunctional bio-based oligomers of the invention and to curable coating compositions containing them.
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