Patent ID: 6642307
Filing Date: 2003-11-04
Classification: C08F

Abstract:
A process for preparing a fluorine-containing polymer, which comprises a step for preparing an emulsion in which particles comprising a substance being substantially insoluble in water being in the form of liquid at 20Â° at 1 atm, and comprising a polymerizable monomer or a mixture of a polymerizable monomer and chain transfer agent are dispersed and a step for polymerizing at least one fluorine-containing ethylenic unsaturated monomer and said polymerizable monomer in the emulsion; wherein, a weight of said substance is Â¼ or more based on a weight of an aqueous medium in the emulsion, a volume average particle size of said particles in the emulsion which are substantially insoluble in water is 80 to 250 nm prior to polymerizing and said at least one fluorine-containing ethylenic unsaturated monomer is in the form of gas at 20Â° at 1 atm.