Patent ID: 8367784
Filing Date: 2013-02-05
Classification: C08F

Abstract:
1. Process to polymerize at a polymerization temperature a polymerizing reaction mixture comprising vinyl chloride monomer and optional further monomers using one or more initiators including at least one organic initiator with a half-life of from 0.0001 hour to 0.030 hour at the polymerization temperature, with at least part of said initiators being dosed to the polymerizing reaction mixture, the process comprising dosing the at least one organic initiator with a half-life of from 0.0001 hour to 0.030 hour at the polymerization temperature to the polymerizing reaction mixture at said polymerization temperature, the polymerization temperature being above the temperature at which the half-life of the at least one organic initiator is 0.030 hour, wherein the one or more initiators does not comprise 2,2-bis(2,2-dimethylpropanoylperoxy)-4-methyl pentane or 2-(2,2-dimethylpropanoylperoxy)-2-(2-ethylhexanoylperoxy)-4-methyl pentane.