METHOD FOR PREPARATION OF HYDROPHOBE CONTAINING ALKALI SOLUBLE OR SWELLABLE EMULSION COPOLYMERS

摘要

PATENT APPLICATION OF Ching-Jen Chang for IMPROVED METHOD FOR PREPARATION OF HYDROPHOBE CONTAINING ALKALI SOLOBLE OR SWELLABLE EMULSION COPOLYMERS DN 82-53 ARS/rvp This invention relates to an improved process for the preparation of alkali soluble or swellable emulsion copolymers. The process employs a moderately hydrophobic in-process additive during the polymerization of the copylymer. The hydrophobe-containing alkali soluble or swellable emulsion copolymers display enhanced thickening efficiency in aqueous solutions and compositions.