POLYGLYCEROL PARTIAL ESTER OF SATURATED OR UNSATURATED LINEAR OR BRANCHED-CHAIN FATTY ACID AND POLYFUNCTIONAL CARBOXYLIC ACID, ITS PRODUCTION AND W/O-TYPE EMULSIFYING AGENT AND DISPERSION ASSISTANT COMPOSED THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a polyglycerol partial ester producible from a natural raw material and having improved stability. SOLUTION: This polyglycerol partial ester of a saturated or unsaturated linear or branched-chain fatty acid and polyfunctional carboxylic acid is produced by esterifying a polyglycerol mixture with a 12-22C saturated or unsaturated linear or branched-chain fatty acid and a 4-54C polyfunctional carboxylic acid having an average functionality of 2-2.4. The ester has a polyglycerol esterification degree of 30-75%.