Dispersion polymerization, e.g. of vinyl acetate, in liquid or supercritical carbon dioxide involves using, as stabilizer, a comb-like block copolymer with siloxane side-chain units and hydrocarbon spacers

摘要

A process for the dispersion polymerization of ethylenically unsaturated monomer(s) (EUM) in liquid or supercritical carbon dioxide is carried out in presence of a stabilizer with a comb-like block structure comprising an EUM-based polymer backbone with side chains consisting of hydrocarbon spacers and siloxane units.