A novel chlorinated poly(vinyl chloride) ("CPVC") resin is prepared by a two-step process which uses an organic peroxide catalyst rather than a source of actinic light. The novel two-step "photoless" process yields a CPVC ("two-step CPVC") which, even at 72% Cl, is easily fusible at 170.degree. C. It...http://www.google.com/patents/US5340880?utm_source=gb-gplus-sharePatent US5340880 - Post-chlorinated suspension-polymerized poly(vinyl chloride) having at least 70 percent chlorine
