Patent ID: 8623952
Filing Date: 2014-01-07
Classification: B29K,C08F,C08L

Abstract:
1. A process for preparing a chlorinated vinyl polymer latex, the process comprising: radically polymerizing at least one chlorinated vinyl monomer in an aqueous emulsion in the presence of a methyl methacrylate polymer seed latex, wherein the polymerizing takes place in the presence of at most 3% by weight, expressed relative to a total weight of monomers, of dry matter of said methyl methacrylate polymer seed latex, wherein particles of the methyl methacrylate polymer seed latex have an average diameter, measured by hydrodynamic fractionation, less than or equal to 60 nm, and wherein a particle diameter distribution of the particles, determined by hydrodynamic fractionation, is monomodal and has a standard deviation less than or equal to 20 nm.