AQUEOUS DISPERSION OF VINYLIDENE FLUORIDE COPOLYMER, AQUEOUS DISPERSION OF VINYLIDENE FLUORIDE SEED POLYMER, AND PROCESSES FOR PRODUCING THE DISPERSIONS

摘要

An aqueous dispersion of a vinylidene fluoride (VdF) copolymer which is produced by the emulsion polymerization of VdF monomer and a reactive emulsifier, wherein the average particle diameter of the copolymer is as small as 200 nm or less, while the solid concentration is as high as 30-60 wt.%, and which is excellent in sedimentation stability; and an aqueous dispersion of a VdF seed polymer which is produced by the seed polymerization of an ethylenically unsaturated monomer in the presence of the particles obtained by the emulsion polymerization of VdF monomer and a reactive emulsifier, wherein the average particle diameter of the seed polymer is as small as 250 nm or less, while the solid concentration is as high as 30-60 wt.%, and which is excellent in sedimentation stability.