Patent ID: 9068072
Filing Date: 2015-06-30
Classification: C08K,C08L,F16L,Y10T

Abstract:
1. A CPVC pipe having a standard dimension ratio of 13.5 which is made with a CPVC composition meeting a hydrostatic design basis (HDB) of at least 1250 psi at the 100,000 hr intercept, as measured according to ASTM-D2837-01 at 180° F., wherein the pipe is of a cell class of at least 2-4-4-4-7 and has a pressure rating of at least 100 psig as calculated using a safety factor of 0.5 and wherein the CPVC composition is comprised of (a) 100 parts by weight of a CPVC resin, wherein the CPVC resin has a chlorine content which is within the range of 66.5 percent to 70 percent by weight and made from PVC having an inherent viscosity of at least 0.88; (b) about 5 to about 6 parts by weight of an impact modifier which is a graft copolymer having a polydiene rubber backbone with styrene, acrylonitrile, and/or an acrylate monomer grafted to the polydiene rubber backbone; (c) about 1 to about 7 parts by weight of an inert filler, (d) about 1.3 to about 3.5 parts by weight of a lubricant; (e) about 1.25 to about 3 parts by weight of an organotin stabilizer, and (f) from about 1.5 to about 3 parts by weight of a chlorinated polyethylene.