Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-05-09
1992-09-01
Seccuro, Carman J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 84, 525 85, 525 86, 525 98, 525194, 525222, 525227, 525238, 525239, C08L 2706
Patent
active
051439751
ABSTRACT:
Blend compositions are provided comprising first polyvinyl chloride and a second polyvinyl chloride wherein the inherent viscosity (I.V.) of the second polyvinyl chloride, measured in accordance with ASTM1243 is at least about 0.2 units higher than the I.V. of the first polyvinyl chloride. Preferably the I.V. of the second polyvinyl chloride is from 0.2 to 1.0 units higher than the I.V. of said first polyvinyl chloride, with the most preferred difference in I.V. (.DELTA.I.V.) being 0.35 to 0.65 units so as to yield a balance of property improvements including impact resistance, heat distortion temperature, melt flow and melt viscosity. The compositions also can further comprise melt flow enhancers and/or Tg enhancing agents. The blends of the present invention are processible by a variety of techniques including injection molding, extrusion, calendering, thermoforming, compression molding and the like to form useful articles such as molded sheets, trays, shrouds as for fans, appliance parts and covers, electrical outlets, business machine housings, telecommunication equipment, automotive components, and numerous others.
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Daniels Charles A.
Greenlee William S.
Kinson Philip L.
Kline Sally A.
Rajagopalan Murali
Dearth Miles B.
Powell Joe A.
Seccuro Carman J.
The B. F. Goodrich Company
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