METHOD FOR PREPARING HALOGENATED COPOLYMERS, RESULTING HALOGENATED POLYMERS AND USE THEREOF

摘要

The invention concerns a method for preparing halogenated copolymers by copolymerising at least two monomers, whereby copolymerisation is carried out in an aqueous dispersion, on the intervention of a primer whereof a fraction is introduced in the polymerisation charge and the introduction of the other fraction is delayed. The resulting halogenated copolymers are copolymers with a melting temperature determined by differential thermoanalysis not more than 140 DEG C and a relative viscosity, measured at a concentration of 10 g/l in tetrahydrofurane, not less than 1.30. Said copolymers can be used for making extruded articles.