Phillips Petroleum Company

Fay W Bailey

Max P McDaniel

Elizabeth Ann Benham

William M Whitte

Kenneth W Willcox

Donald D Norwood

Emory W Pitzer

Elizabeth A Boggs

Robert L Rees

Charles L Ryan, Jr

Max P Mcdaniel

A copolymer of ethylene and a higher alpha-olefin, preferably 1-hexene and/or 4-methyl-1-pentene, can be produced using an activated and subsequently carbon monoxide reduced chromium containing catalyst and a trialkyl boran cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that can be made into a tough, impact resistant film.

High strength linear, low density ethylene copolymer

Articles are blow-molded from a polyphenylene sulfide resin having a melt flow in a range of from about 1 to about 10 g/10 min., and preferably in a range of from about 4 to about 8 g/10 min. When filler materials such as mica are added, the upper end of the acceptable melt flow range is raised to about 15 g/10 min. By maintaining mold temperatures in a range of from about 250.degree. to about 400.degree. F., and preferably from about 275.degree. to about 325.degree. F., the polyphenylene sulfide material in the blow-molded article is provided with a semi-crystalline structure, and is dimensionally stable at temperatures of at least 500.degree. F. Filler materials are preferably provided in a range of from about 10 to about 20 weight percent.

Method of extrusion blow-molding polyphenylene sulfide articles

An improved polyolefin composition, film product, and a method of preparation are provided. Fluoropolymers, preferably fluoroelastomers, and metal stearates, are added to polyolefins. The composition has and exhibits improved impact strength and better processability.

Polyolefin composition containing fluoropolymer

High strength linear, low density polyethylene polymerization process

The present invention pertains to a process for cleaning polymeric processing equipment. The process comprises purging the polymer processing equipment with a composition comprising a polymer, a mild abrasive and a sulfonated surfactant.

Process for cleaning polymer processing equipment

Ethylene polymer is particularly suitable for the production of tough film is produced under slurry conditions using a fluorided aluminophosphate support and a reaction temperature within the range of 93.degree. to 107.degree. C. in the presence of hydrogen and a small amount of trialkyl boron cocatalyst wherein said aluminophosphate has a phosphorous to aluminum ratio within the very narrow range of 0.15 to 0.4 and wherein said aluminophosphate carrying chromium catalyst is being activated at a temperature within the range of 482.degree. to 704.degree. C. The resulting film is not only substantially superior to film made from the best of the readily available commercial resins but is also better than film made from polymers using a similar catalyst system without the specific combination of parameters of this invention.

Olefin polymerization using chromium on fluorided aluminophosphate

Ethylene polymer blends of a high molecular weight ethylene polymer, preferably an ethylene-mono-1-olefin copolymer, and a low molecular weight ethylene polymer preferably an ethylene homopolymer, both preferably with narrow molecular weight distribution and low levels of long chain branching exhibit excellent film properties and good environmental stress crack behavior superior to that expected for polyethylene of comparable density and melt flow. These resins are useful for the manufacture of film or in blow molding techniques, the production of pipes and wire coating.

Ethylene polymer blends and process for forming film

A high impact resistant composition consisting essentially of a thermoplastic resin blended with an admixture of mica and at least one ingredient selected from the group consisting of polybutylenes, metal salts of long-chain fatty acids, and mineral oils.

Thermoplastic resin composition having high impact strength

Ethylene polymer blends

A high impact resistant polymer is provided comprising a blend of (a) a resinous, essentially non-elastomeric copolymer of a conjugated diene and vinylarene and (b) a copolymer of a vinylarene and an acrylate.

Polymer blend of diene/vinyl aromatic block copolymer and

A vinylarene-olefinically unsaturated nitrile copolymer, such as a styrene-acrylonitrile copolymer, is blended with a resinous conjugated diene-vinylarene copolymer, such as a butadiene-styrene copolymer, to improve the impact resistance of the latter.

Copolymer blend of improved impact resistance

A blend comprising (1) a styrene polymer and (2) thermoplastic elastomer of a monovinyl-substituted aromatic compound and a conjugated diene having a melt flow within the range of 2-15, said blend having a diene content within the range of 18-24 weight percent. Such blends have outstanding toughness.

Impact styrene polymer blends with thermoplastic elastomers

Polymers of ethylene having a melt index of at least 10 are simultaneously rotationally molded and crosslinked by an acetylenic diperoxy compound to produce molded articles having high impact strength and stress cracking resistance.

Rotational molding and compositions therefor

Thermoplastic resin alloys containing polyphenylene sulfide resin and at least one other thermoplastic resin selected from the group consisting of polyarylsulfones, polyphenylene oxides, and polyarylcarbonates are disclosed which have certain physical properties that are better than those of at least one of the resins employed in preparing the alloy. Also, specific polyphenylene sulfide/polyarylsulfone alloy compositions are disclosed which have certain physical properties that are better than those of either the polyphenylene sulfide or the polyarylsulfone employed.

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Bartlesville, OK, United States of America

Fay W Bailey