Procedure for the obtaining of vinyl chloride polymers. (Machine-translation by Google Translate, not legally binding)

摘要

Process for obtaining transparent vinyl chloride polymers, resistance to shock and stable to atmospheric agents, by polymerization of vinyl chloride, if appropriate together with other polymerizable monomers, in aqueous dispersion, according to the emulsion polymerization process, in the presence of acrylate copolymers, characterized in that vinyl chloride or mixtures of monomers, with at least 80% by weight of vinyl chloride, is polymerized in the presence of a dispersion of at least one copolymer of 90 to 99.7% by weight of at least one acrylate with 3 to 16 carbon atoms in the ester group and 0.3 to 10% by weight of a polyfunctional monomer, with at least two non-conjugated ethylenic double bonds, of which at least one is rail allyl type, the copolymer showing a mean particle diameter, determined by soap calorimetry of 30 to 15 mm, preferably from 40 to 120 nm and used in a such amount, so that the final polymer contains 4 to 20% by weight of acrylate elements. (Machine-translation by Google Translate, not legally binding)