Polyester-modified vinyl polymer and production method thereof
AssigneeHitachi Chemical Company, Ltd.
InventorsTuneo Tanuma, Teruo Yoshida
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Abstract
A polyester-modified vinyl polymer comprising 50 - 3% by weight of a polyester component and 50 - 97% by weight of a polyvinyl component grafted on the polyester component, the polyester component having an oil length of 5 to 20%, an average molecular weight of 1,000 to 6,000, and an .alpha.,.beta.-unsaturated dicarboxylic acid component content of 1 to 5% by weight on the polyester component. The polyester-modified vinyl polymer is useful in a high-solid solvent type coating composition.
Claims20
A process for producing a polyester-modified vinyl polymer for use in a high-solids coating composition, which comprises graft-polymerizing 97 to 50% by weight of at least one vinyl monomer selected from the group consisting of an acrylic monomer, styrene, a styrene derivative, acrylonitrile, acrylamide, vinyl chloride and vinyl acetate, in the presence of 3 to 50% by weight of a polyester having an oil length of 5 to 20%, an average molecular weight of 1,000 to 6,000, and an .alpha.,.beta. -unsaturated dicarboxylic acid component content of 1 to 5% by weight on the polyester, by use of 5% by weight or more (based on monomeric component) of an azobisnitrile catalyst.
Dependencies are inferred from the claim text.