Method of producing highly branched polyesters with unsaturated end groups
AssigneeDainippon Ink and Chemicals, Inc.
InventorsRainer Bruno Frings, Gerwald F. Grahe, Ou Shibata
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Abstract
A one-step polymerization process, leading directly to highly branched polyesters with unsaturated, either acrylate or sorbate end groups is described, which is based on the Diels-Alder reaction of polyfunctional sorbic esters with acrylates in defined ratios. A preferred embodiment of the invention is the Diels-Alder polymerization in aqueous emulsion.
Claims13
Method of producing a highly branched polyester with unsaturated end groups, comprising polymerizing an m-functional sorbic acid ester for component A and an n-functional acrylic acid ester for component B in a Diels-Alder reaction at a temperature of from 50 to 150° C., wherein
- (i) m and n are natural whole numbers from 2 to 6 and m differs from n by at least 1 and
- (ii) components A and B are used in a molar ratio satisfying the following equation (1):
- ne/nv≧fv−1 (1)
- wherein ne is the molar number of the component having a lower functionality, nv is the molar number of the component having a higher functionality and fv represents the functionality of the component with the higher functionality.
Dependencies are inferred from the claim text.