Patent ID: 8053511
Filing Date: 2011-11-08
Classification: C08F,C09D

Abstract:
1. A process of emulsion polymerization of free-radically polymerizable ethylenically unsaturated monomers selected from the group of monoesters or diesters of ethylenically unsaturated monocarboxylic or dicarboxylic acids with alkanols, vinyl esters and/or vinylaromatics and, optionally, further monomers copolymerizable therewith, at least 60% of total conversion in the emulsion polymerization taking place at a temperature of 100° C. to 160° C., which comprises performing the emulsion polymerization in the presence of emulsifiers and optionally in the presence of protective colloids, the protective colloids being present in an amount of from 0% to 0.8% by weight, based on a total amount of the monomers used, and wherein a water-soluble initiator is used without the use of an oil soluble initiator, and wherein the process comprises a metering process in which 5% to 50% by weight of the monomers, based on the total amount of monomers, is included in the initial charge.