Rigid extrusion profiles of chlorinated polyvinyl chloride polym

Details Rigid extrusion profiles of chlorinated polyvinyl chloride polym Rigid extrusion profiles of chlorinated polyvinyl chloride polym

1995-10-11

1997-06-24

Wilson, D. R.

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...

525192, 525239, 2641761, C08L 2328, C08L 2724, C08K 552

Patent

active

056418264

ABSTRACT:
Blends of chlorinated polyvinyl chloride and chlorinated polyethylene and methods for preparing extruded profiles such as a window spacer, a glazing bead, a window lineal, and a track for lighting, having smooth surface characteristics are disclosed. The blends comprise 100 weight parts CPVC containing from 62% to 72% chlorine, preferably 65% to 71% chlorine and from 10 to 30 weight parts, preferably 15 to 25 parts of chlorinated polyethylene containing from 25 to 45% chlorine and extruding the blend. The preferred embodiments of the invention are further defined by a particular combination for the chlorine content of CPVC, the real weight average molecular weight of CPE (M.sub.w) and polydispersity (M.sub.w /M.sub.n), defined as the ratio of the weight average to number average molecular weight, and extrusion shear rate.

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