Patent ID: 7943691
Filing Date: 2011-05-17
Classification: C08K,Y10T

Abstract:
1. A CPVC compound, comprising: heat chlorinated CPVC; external lubricant; heat stabilizer; and optional ingredients; (a) wherein the compound is essentially free of internal lubricants; (b) wherein the compound has a high heat deflection temperature; (c) wherein the compound is optically clear; (d) wherein the heat chlorinated CPVC is a homopolymer or copolymer of vinyl chloride with minor amounts of other co-monomers, if any, containing by weight from about 58% to about 70% chlorine; (e) wherein the heat chlorinated CPVC has an inherent viscosity from about 0.45 to about 1.5, as measured by using 0.2 grams of resin in 100 ml of cyclohexanone at 30 degrees C. by ASTM D 1243; and (f) wherein the heat chlorinated CPVC has a weight average molecular weight of from about 39,000 to about 150,000 and a K value ranging from about 53 to 60.