Patent ID: 9133292
Filing Date: 2015-09-15
Classification: B32B,C08F,C08G,C08L,C09D

Abstract:
1. A method for preparing a thermally curable hydroxyl functional oil polyol graft copolymer for a coating composition usable for coating a food or beverage container, the method comprising: a) reacting an epoxidized vegetable oil with a hydroxyl functional polyol in the presence of a strong acid catalyst at a temperature from 50 to 200° C. to form a hydroxyl functional oil polyol; and b) reacting the hydroxyl functional oil polyol with an ethylenically unsaturated monomer component in the presence of an initiator to form the hydroxyl functional oil polyol graft copolymer; wherein the hydroxyl functional polyol is selected from the group consisting of propylene glycol; 1,3 propanediol; ethylene glycol; neopentyl glycol; trimethylol propane; diethylene glycol; a hydroxyl functional polyester; a hydroxyl functional polyolefin; or a mixture thereof.