Mobil Oil Corporation

Union Carbide Corporation

Richard G Shaw

Peter J Canterino

Tien-Kuei Su

Theresa L Cunningham

Surinder K Bahl

David V Dobreski

Shaw-Chang Chu

Paul A King

Susan P Evans

Robert Bostwick

Arthur C Frechtling

Norman W Johnston

Walter A Miller

Amar Amembal

Head pressure and extruder torque in the extrustion of linear ethylene polymers such as linear low density polyethylene (LLDPE) are reduced by adding a small amount (less than 5 weight percent) of a thermoplastic polyurethane. Films extruded from the blend exhibit better surface appearance by reduction of melt fracture.

Blends and films of linear ethylene polymers with polyurethane and

Films containing LLDPE having a high modulus and good tear strength for the high modulus and improved processing conditions are obtained by blending minor amounts of polystyrene or other aromatic polymer, and polypropylene with the LLDPE.

Blends of LLDPE, polypropylene and aromatic polymers and high modulus

The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 --C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g., 0.02 to 2 weight percent ethylene-vinyl polymer to reduce melt fracture, head pressure and to obtain films having excellent anti-blocking characteristics. Optionally, diatomaceous earth is added to further reduce blocking.

Compositions of linear polyethylene and ethylene-vinyl alcohol polymer

Composition and films of linear ethylene polymers such as linear low density polyethylene containing up to about 3 weight percent of a blend of polyphenylene oxide and styrene resin exhibit excellent physical properties particularly impact strength.

High impact blends and films of linear polyethylene, polyphenylene oxide

The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 -C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g., 0.02 to 1 weight percent polyacetal fluoride to reduce melt fracture, head pressure and extruder torque.

Method of extrusion of compositions of linear polyethylene and

The extrudability of linear polymers of ethylene such as low density copolymers of ethylene and C.sub.4 -C.sub.10 olefins (LLDPE) into thin films is improved by adding small amounts, e.g., 0.02 to 2 weight percent polyvinylidene fluoride to reduce melt fracture, head pressure and to obtain films having excellent anti-blocking characteristics.

Compositions of linear polyethylene and polyvinylidene fluoride for film

Linear low density copolymers (LLDPE) are blended with up to about 10 weight percent of an aromatic polymer, e.g., polystyrene or poly(para-methylstyrene), to give films having improved MD tear strength or equivalent MD tear strength and higher stiffness compared to the LLDPE alone. Also, extruder torque is lower and bubble stability is greater in blown film extrusion with the blends as well as in blends in which medium or high density polyethylene is used instead of the LLDPE.

Films of blends of linear ethylene polymers and aromatic polymers

Polymeric blends comprising linear low density polyethylene (LLDPE) as the major constituent (60 percent or more), and polypropylene (PP) or ethylene-propylene copolymer having a high propylene content and ethylene-propylene rubber as minor constituents exhibit improved stiffness, tear and impact strength compared to blends of LLDPE and PP. The blends are suitable for use in the films.

Films of LLDPE, PP and EPR having improved stiffness, tear and impact

Melt strength of polyethylene and ethylene-higher olefin copolymers during processing is improved by pretreating the polymer in melt form at a temperature of at least 230.degree. C. in the presence of an organic peroxide for a period of time equal to at least three times the half-life of the organic peroxide at the melt temperature.

Process for improving melt strength of ethylene polymers by treatment

Polymeric blends comprising linear low density polyethylene (LLDPE) as the major constituent (60 percent or more), and polypropylene (PP) or ethylene-propylene copolymer having a high propylene content and ethylene-propylene-diene monomer rubber as minor constituents exhibit improved stiffness, tear and impact strength compared to blends of LLDPE and PP. The blends are suitable for use in films.

Blends of LLDPE, PP and EPDM or EPR for films of improved stiffness,

Reprocessable thermoplastic graft copolymers of propylene polymer and ethylene copolymer are herein described. These graft copolymers are prepared by heating the propylene polymer and ethylene copolymer in the presence of select peroxides in order to graft the propylene polymer onto the ethylene copolymer.

Reprocessable thermoplastic graft copolymer of propylene polymer and

Polymer composites having enhanced mechanical or chemical properties have been prepared by first coating the filler component of the composite with a free-radical polymerization initiator which adheres to the surface of the filler and then polymerizing an ethylenically unsaturated monomer onto the filler.

Polymer composites and preparation thereof

The facile extrusion of ethylene oxide resins has been effected by employing water as an extrusion aid.

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Remsen, NY, United States of America

Richard G Shaw