Phillips Petroleum Company

Yu, Michael C.

Scoggins, Lacey E.

Reed, Jerry O.

Jerry O Reed

Ronald D Mathis

Jon F Geibel

Rex L Bobsein

Michael Duane Cliffton

Gerald E Hagler

Lacey E Scoggins

Michael C Yu

Timothy W Johnson

Guy Senatore

Dale O Tieszen

H Wayne Hill, Jr

An improved pipe is produced from phenylene sulfide/biphenylene sulfide copolymers, The improved pipe has greater flexibility and ductility than pipe produced from normal PPS resin. Such pipe is produced by preparing a phenylene sulfide/biphenylene sulfide copolymer and forming the copolymer into essentially amorphous pipe by extrusion followed by rapid and uniform quench to avoid pipe crystallization, Also disclosed is a method wherein such amorphous pipe is oriented by subsequent die extrusion.

Phenylene sulfide/biphenylene sulfide copolymer pipe

A method is provided for the production of poly(arylene sulfide) compositions comprising

Process for the preparation of poly(arylene sulfide) compositions

An aromatic sulfide/ketone polymer is prepared from a dihaloaromatic ketone, alkali metal sulfide, water and a polar organic compound. The polymerization reaction mixture is subjected to a heat soak at an elevated temperature, then a separation agent is added under controlled conditions and the mixture is subsequently cooled to provide a mixture comprising particulate aromatic sulfide/ketone polymer. Biaxially-oriented film is made from the recovered particles of aromatic sulfide/ketone polymer by (1) washing the polymer particles with an aqueous calcium salt, (2) heating the washed particles to remove water, (3) molding the heated particles to form a sheet of polymer, (4) biaxially stretching the sheet above the glass transition temperature of the polymer to form a film, and (5) heat-setting the biaxially-oriented film under stretching tension for a time and at a temperature to increase strength properties and density.

Production of biaxially-oriented film from aromatic sulfide/ketone

An improved pipe is produced from phenylene sulfide/biphenylene sulfide copolymers. The improved pipe has greater flexibility and ductility than pipe produced from normal PPS resin. Such pipe is produced by preparing a phenylene sulfide/biphenylene sulfide copolymer and forming the copolymer into essentially amorphous pipe by extrusion followed by rapid and uniform quench to avoid pipe crystallization. Such amorphous pipe also can be oriented by subsequent die extrusion.

Process of making phenylene sulfide/biphenylene sulfide copolymer pipe

Aromatic sulfide/ketone polymer is prepared from dihaloaromatic ketone, alkali metal sulfide, water and a polar organic compound. The polymerization reaction mixture comprising the aromatic sulfide/ketone polymer is subjected to a heat soak at elevated temperature then a separation agent (non-solvent) is added under controlled conditions and subsequently cooled to provide a mixture comprising particulate aromatic sulfide/ketone polymer. Biaxially-oriented film is made from recovered particles of aromatic sulfide/ketone polymer prepared as described by (1) washing the polymer particles with an aqueous calcium salt, (2) heating said washed particles to remove water, wherein the resulting heated particles are at least partially crystalline, (3) molding said heating particles to form a sheet of polymer, (4) biaxially stretching said sheet above the glass transition temperature of the polymer to form a film, and (5) heat-setting said biazially-oriented film under stretching tension for a time and at a temperature to increase strength properties and density.

Production of aromatic sulfide/ketone polymers with separation agent

Poly(arylene sulfide) resins are modified by melt mixing a resin with a basic additive to form a resin product composition. The basic additive is selected from the group consisting of inorganic hydroxides, inorganic oxides and organic metal salts wherein the metals are from Group IA, IIA, or IIB and the salts are of carboxylic acids and phenols. The product compositions are suitable for injection molding, film forming and fiber spinning processes.

Method to modify poly(aryle sulfide) resins

The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising phenolic amide or ester-based antioxidants. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.

Polymer stabilization

The heat stability of arylene sulfide polymers, such as poly(p-phenylene sulfide) is improved by the addition of cure retarders comprising metal sorbates and, optionally, an alkaline earth metal nitrite.

Stabilization of polyphenylene sulfide

A biaxially-oriented amorphous polyamide film and the preparation thereof are described. The film exhibits good physical and optical properties. In a specific embodiment, the amorphous polyamide is a product of the polymerization of 2,2-bis(4-aminocyclohexyl)propane with a mixture of adipic acid and azelaic acid. The polymer is extruded as a sheet and biaxially oriented under described conditions to produce a clear film having a high glass transition temperature and improved elongation properties.

Biaxially oriented polyamide film

A method of producing poly(arylene sulfide) resin suitable for the commercial production of fibers. The method includes the two stage melt filtration of a suitable poly(arylene sulfide) polymer, e.g., poly(p-phenylene sulfide), through a primary filter having an absolute micron rating of no more than about 125 microns, and through a secondary filter having a maximum absolute micron rating of about 80 or a substantially equivalent filter capacity. Also disclosed are various forms of apparatus for performing the method. In one form the apparatus employs a depth type filter of metallurgically bonded micronic size stainless steel fibers as the primary filter and one or more edge sealed screen combinations each containing one 325 mesh screen as the secondary filter. A secondary filter comprising a mesh screen and a quantity of suitable sand is also disclosed.

Method of producing extrusion grade poly(arylene sulfide)

The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising an aminotriazole. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.

A process for the removal of poly(arylene sulfide) deposits on metal surfaces is provided by contacting the deposit with at least one diaryl ether under temperature conditions and for a time sufficient to remove said poly(arylene sulfide) deposits. A process for the cleansing of metal parts having poly(arylene sulfide) deposits is also provided which comprises treatment with a diaryl ether, and thereafter contacting the ether treated part with an alcohol, washing the part with water, drying the part, and thereafter contacting the dried part with concentrated HNO.sub.3 followed by water washing and drying.

Process for cleaning metal surfaces

A process for the removal of poly(arylene sulfide) deposits is provided which comprises contacting said deposits with a solution comprising an alkali metal hydrosulfide in a lactam. In addition, a process for the cleaning of metal parts having poly(arylene sulfide) deposits is provided by contacting the metal parts in the manner as described immediately above, contacting the metal part with a lower alkyl alcohol, washing said metal part with water, drying said metal part, contacting the dried part with concentrated HNO.sub.3 followed by water washing and drying.

Process for cleaning metal surfaces of poly(arylene sulfide) deposits

A process for removing poly(arylene sulfide) deposits from metal surfaces is provided which comprises contacting said deposits with a halogenated cleaning agent followed by contacting the remaining deposits with a solution of a aluminum halide in an aromatic hydrocarbon. In addition, a process for the cleansing of metal parts having poly(arylene sulfide) deposits is provided which comprises contacting the parts in a manner as described immediately above, and thereafter contacting the metal parts with a lower alkyl alcohol, washing the metal part with H.sub.2 O, drying the metal part, followed by treatment of the dried part with concentrated HNO.sub.3.

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Bartlesville, OK, United States of America

Jerry O Reed