PROCESS FOR THE PREPARATION OF POLYMERS BASED ON VINYL HALIDES

摘要

It is provided a process for the preparation of a polymer from a vinyl halide monomer A and a monomer B whose homopolymer has a T g lower than that of the polymer produced by polymerizing the vinyl halide monomer, wherein A wt%/B wt% in the polymer is from 99.7/0.3 to 40/60; the process comprising a) mixing water, an amphiphilic substance,from 10 to 100 wt% of the monomer Bat an appropriate temperature, adding an initiator and allowing the system to react until reaching a conversion from 10 to 100 mol%, b) adding from 20 to 100 wt% of an amount ofmonomer A and the remaining amount of monomer B, and allowing the mixture to react until the conversion of the monomers reaches a value higher than 20 wt%, and c) adding the remaining amount of monomer A and allowing the system to react.