Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-02-20
1997-02-18
Raimund, Christopher
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524414, 524418, C08K 504
Patent
active
056042787
ABSTRACT:
CPVC compounds intended for low shear extrusion, for example of piping, and articles such as piping derived therefrom are disclosed. The compounds comprise CPVC having 69% to 74% by weight chlorine and preferably 65% to about 69% chlorine; an acrylic impact modifier and a first chlorinated polyethylene containing from about 32% to about 37% chlorine by weight and a Mooney viscosity from 25 to 45, and a second CPE containing from about 36 to about 42% chlorine and a Mooney viscosity of from 60 to about 95. Compression molded plaques derived from the powder composition exhibit a good balance of tensile strength, tensile modulus, izod impact strength, HDT and dynamic thermal stability specified herein. A pipe extruded directly from said composition in powder form under ASTM-D2846 exhibits a long term hydrostatic design strength of at least 500 psi at 200.degree. F. The invention is useful, for example, for industrial use applications such as steam condensate lines.
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Raimund Christopher
The B. F. Goodrich Company
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