Vinylidene fluoride-based copolymer aqueous dispersion, vinylidene fluoride-based polymer aqueous dispersion, and a process for their preparation (AQUEOUS DISPERSION OF VINYLIDENE FLUORIDE COPOLYMER.AQUEOUS DISPERSION OF VINYLIDENE FLUORIDE SEED POLYMER.AND PROCESSES FOR PRODUCING THE DISPERSIONS)

摘要

The present invention relates to a vinylidene (VdF) copolymer which is produced by emulsion polymerization of a VdF monomer and a reactive emulsifier, the polymer having an average particle size of 200 nm or less, a solid concentration of 30 to 60 wt% Of an aqueous dispersion; In the presence of particles obtained by emulsion polymerization of a VdF monomer and a reactive emulsifier having an average particle size of 250 nm, a high solid concentration of 30-60% by weight and an excellent sedimentation stability, To an aqueous dispersion of VdF seed polymer produced by the seed polymerization of monomers.