The B. F. Goodrich Company

The Geon Company

Murali Rajagopalan

William S Greenlee

Philip L Kinson

Charles A Daniels

Sally A Kline

Elmer D Dickens, Jr

Zaev Sharaby

Marvin H Lehr

Lynn M Soby

A method for improving the miscibility of vinyl halide polymer based resins with one or more essentially immiscible polymer resins is disclosed. This method comprises adding a polyimide polymer to a mixture containing the vinyl halide resin and the immiscible polymer. Articles made from these compositions are useful for medical applications.

Method for enhancing the miscibility of halogenated polymers with

Ternary alloys of PVC/CPVC/alloying polymers are disclosed which make use of the unexpected results of interactions between alloying polymers and CPVC and PVC, interactions which result in higher heat distortion temperatures than predictable by linear addition of the properties of the binary blends of PVC/CPVC and PVC/alloying polymer systems. This effect allows replacement of substantial amounts of alloying polymer with a predetermined amount of CPVC without changing substantially HDT or melt viscosity. Such effects allow the use of these ternary alloys in place of binary PVC/alloying polymer systems in injection molding and extrusion applications.

Ternary alloys of poly(vinyl chloride) with high heat distortion

Blend compositions and process are provided comprising admixing of chlorinated polyvinyl chloride and polyvinyl chloride, each having specified inherent viscosity wherein the difference in the inherent viscosity of the polyvinyl chloride of the blend, measured in similar accordance with ASTM-D1243 is at least 0.2 units higher than the precursor polyvinyl chloride for the chlorinated polyvinyl chloride of the blend. Preferably the I.V. of the polyvinyl halide is from 0.2 to 1.0 units higher 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 tensile strength, impact resistance, heat distortion temperature and weatherability. The compositions also can further comprise a Tg enhancing agents which otherwise embrittle conventional PVC compounds. 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, piping telecommunication equipment, automotive components, and numerous others.

Chlorinated PVC blends

A polyvinyl halide ionomer which contains in the polymer backbone at least one vinyl halide monomer in polymerized form or at least one vinyl halide monomer and at least one other monomer copolymerizable with vinyl chloride and less than 50% by weight of the ionomer a comonomer containing at least one ester group and at least one neutralized carboxyl group. The ionomer is prepared by neutralizing, preferably in a molten state, a functionalized vinyl halide copolymer containing pendant carboxyl groups. The ionomer has outstanding adhesion to metals and its glass transition temperature is higher than the carboxyl vinyl halide copolymer.

Polyvinyl halide ionomers

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 higher I.V. PVC is present at from 0.1 to less than 20 weight percent of the total PVC content. 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 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, piping, telecommunication equipment, automotive components, and numerous others.

Polyvinyl chloride blends

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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Avon Lake, OH, United States of America

Murali Rajagopalan