C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 51/04 (2006.01) C08L 27/24 (2006.01) C08L 55/02 (2006.01) C08L 23/28 (2006.01)
Patent
CA 2060839
CPVC compositions, pipe, and a method of preparing a pipe are disclosed and comprise CPVC having 63% to 70% by weight chlorine and preferably 65% to about 69% chlorine; a high rubber impact modifier comprising a graft copolymer of a rubbery polydiene and one or preferably more than one hardening monomer selected from a group consisting of a vinyl aromatic monomer, a (meth)acrylate, and a (meth)acrylonitrile monomer including mixtures. Said graft copolymer exhibits a Shore D hardness of less than about 64, and preferably between about 35 and 45; and a chlorinated polyethylene containing between 30% and 40% chlorine by weight, compression molded placques derived from the powder composition exhibit a minimum tensile strength, modules, izod impact strength, Tg and dynamic thermal stability specified herein. A pipe extruded directly from said composition meets ASTM-D2846 and exhibits unexpected ductility down to 20°F (-6.6°C) under fixed drop dart impact testing. The invention is useful for example in articles such as hot and cold water distribution system components installed in seasonal environments.
Hartitz Joachim E.
Noveon Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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