Patent ID: 6297316
Filing Date: 2001-10-02
Classification: C08F,C08L

Abstract:
A process for producing a latex containing two populations of particles of homo- or copolymer of vinyl chloride, which comprises polymerizing, under microsuspension conditions, the corresponding monomer or monomers in the presence of a first seeding polymer (P1), the particles of which contain at least one organosoluble initiator, of a second seeding polymer (P2), the particles of which have a mean diameter less than that of the particles of the first seeding polymer (P1), of water, of an anionic emulsifier, of a soluble metal salt and of a reducing agent, is characterized in that the organosoluble initiator or initiators represent(s) at least 2.5% by weight with respect to the particles of the first seeding polymer (P1).