Patents by Inventor James H. Kawakami
James H. Kawakami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5096997Abstract: Described herein are novel polyarylates derived from mixtures of terephthalic and isophthalic acids, hydroquinone and 4,4'-dihydroxydiphenyl sulfone. The instant polyarylates exhibit excellent stress-crack resistance in a wide variety of solvents. Moreover, the materials display very good mechanical and thermal properties.Type: GrantFiled: August 10, 1987Date of Patent: March 17, 1992Assignee: Amoco CorporationInventors: James H. Kawakami, Lloyd M. Robeson, Robert J. Cotter
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Patent number: 5055114Abstract: Permeable membranes comprised predominantly of specifically defined tetrabromobisphenols and aromatic dicarboxylic acids. The invention also pertains to the novel permeation processes for recovery of an oxygen/nitrogen or carbon dioxide/methane component form a mixture of said component with other components.Type: GrantFiled: December 6, 1989Date of Patent: October 8, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: James H. Kawakami, Natarajan Muruganandam, George L. Brode
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Patent number: 5039717Abstract: Injection-moldable copolyesters of terephthalate units, ethylene units and a high proportion (e.g. 82-87) mole %) of oxybenzoate units, and cookware made of such copolyesters. Process for making such copolyesters by reacting polyethylene terephthalate with p-acetoxybenzoic acid in a solvent, first at a temperature below 240.degree. C. to product a fragmented polyester, raising the temperature to split off acetic acid, then adding more acetoxybenzoic acid to raise the oxybenzoate content to more than 80 mole %.Type: GrantFiled: January 30, 1989Date of Patent: August 13, 1991Assignee: Amoco CorporationInventors: James H. Kawakami, Lloyd M. Robeson, Bernard Cooker, Lee P. McMaster, Louis M. Maresca
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Patent number: 5036150Abstract: This invention relates to moldable polyarylates and in particular to moldable polyarylate compositions which have repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl) sulfone (TMBS), optionally a dihydric phenol such as 2,2-bis-(4-hydroxyphenyl)-propane (Bisphenol A) and a mixture of isophthalic acid and terephthalic acid or derivatives thereof. Such polyarylates exhibit improved hydrolytic stability.Type: GrantFiled: April 20, 1990Date of Patent: July 30, 1991Assignee: Amoco CorporationInventors: James H. Kawakami, James E. Harris, Louis M. Maresca, Lloyd M. Robeson
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Patent number: 4994095Abstract: Permeable membranes comprised predominantly of specifically defined polyester of 4,4'-(1H-alkylidene)bis[2,3,6-trialkylphenol] and aromatic dicarboxylic acids. The invention also pertains to the novel permeation processes for recovery of an oxygen/nitrogen or carbon dioxide/methane or helium/methane component from a mixture of said component with other components in the mixture.Type: GrantFiled: December 6, 1989Date of Patent: February 19, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: James H. Kawakami, Natarajan Muruganandam, George L. Brode
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Patent number: 4971695Abstract: Sulfonated hexafluoro bis-A-polysulfone membranes of polymers and copolymers having the repeat unit of the structure; ##STR1## in the polymer molecule that exhibit improved permeation and separation characteristics and processes for the use thereof for separation of a component from a fluid mixture of said component in admixture with other components.Type: GrantFiled: October 31, 1989Date of Patent: November 20, 1990Assignee: Union Carbide Industrial Gases Technology CorporationInventors: James H. Kawakami, Benjamin Bikson, Gertrud Gotz, Yurdagul Ozcayir
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Patent number: 4720540Abstract: Described is a process for improving the color of thermoplastic polymers by contacting the polymer with a peracid, hydrogen peroxide or other peroxygen compound.Type: GrantFiled: May 14, 1985Date of Patent: January 19, 1988Assignee: Amoco CorporationInventors: Louis M. Maresca, James H. Kawakami
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Patent number: 4705822Abstract: This invention relates to moldable polycarbonate compositions and in particular to moldable polycarbonates which have ordered, alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS) and 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A) dihaloformate, or ordered, alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl) sulfone (TMBS) dihaloformate and a bisphenol compound such as 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A). Such polycarbonate exhibit improved hydrolytic stability and also excellent processability in molding applications.Type: GrantFiled: June 10, 1986Date of Patent: November 10, 1987Assignee: Amoco CorporationInventors: James H. Kawakami, James E. Harris, Louis M. Maresca, Lloyd M. Robeson, Robert J. Cotter
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Patent number: 4698390Abstract: A molding composition containing a compatible blend of (i) a polycarbonate having repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS), optionally a dihydric phenol such as 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A) and a carbonate precursor, and (ii) a vinyl chloride derived polymer.Type: GrantFiled: April 10, 1986Date of Patent: October 6, 1987Assignee: Amoco CorporationInventors: Lloyd M. Robeson, James E. Harris, James H. Kawakami, Louis M. Maresca
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Patent number: 4665122Abstract: A moldable and compatible blend of 5 to 95 weight percent polycarbonate comprising from about 20 weight percent to 100 weight percent of repeating units (I) having the formula ##STR1## and from 0 weight percent to about 80 weight percent of repeating units (II) having the formula ##STR2## in which the repeating units (I) and the repeating units (II) are connected by interbonding units (III) having the formula ##STR3## wherein Y is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each Z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R.sub.1 is a divalent saturated or unsaturated aliphatic hydrocarbon radical, O, CO, SO.sub.2, S or a direct bond, with the proviso that when R.sub.1 is SO.sub.2 then repeating unit (II) is not the same as repeating unit (I), and 95 to 5 weight percent of a styrenic polymer.Type: GrantFiled: July 24, 1985Date of Patent: May 12, 1987Assignee: Amoco CorporationInventors: Lloyd M. Robeson, James E. Harris, Louis M. Maresca, James H. Kawakami
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Patent number: 4594404Abstract: This invention relates to moldable polycarbonate compositions and in particular to moldable polycarbonates which have ordered alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl)sulfone (TMBS) and 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A) dihaloformate, or ordered, alternating repeating units derived from bis-(3,5-dimethyl-4-hydroxyphenyl) sulfone (TMBS) dihaloformate and a bisphenol compound such as 2,2-bis-(4-hydroxyphenyl)propane (Bisphenol A). Such polycarbonates exhibit improved hydrolytic stability and also excellent processability in molding applications.Type: GrantFiled: March 20, 1984Date of Patent: June 10, 1986Assignee: Union Carbide CorporationInventors: James H. Kawakami, James E. Harris, Louis M. Maresca, Lloyd M. Robeson, Robert J. Cotter
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Patent number: 4558106Abstract: Described is a process for improving the color of thermoplastic polymers by contacting the monomer(s) before or during polymerization with an alkali or alkaline earth metal formate.Type: GrantFiled: March 29, 1983Date of Patent: December 10, 1985Assignee: Union Carbide CorporationInventors: James H. Kawakami, Louis M. Maresca
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Patent number: 4520168Abstract: Color improved polyarylates having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm produced by a process comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.Type: GrantFiled: March 27, 1984Date of Patent: May 28, 1985Assignee: Union Carbide CorporationInventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
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Patent number: 4439586Abstract: An improved process for preparing a polyarylate having a reduced viscosity of from about 0.1 to greater than 1.0 dl/gm comprising the following steps:(a) reacting an acid anhydride derived from an acid containing from 2 to 8 carbon atoms with at least one dihydric phenol to form the corresponding diester; and(b) reacting said diester with at least one aromatic dicarboxylic acid at a temperature sufficient to form the polyarylate, wherein the improvement comprises carrying out said process in the presence of a particular solid adsorbent.Type: GrantFiled: June 30, 1982Date of Patent: March 27, 1984Assignee: Union Carbide CorporationInventors: James H. Kawakami, Benito See, Thomas R. Jones, Louis M. Maresca
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Patent number: 4275186Abstract: Oligomers of hydroxy terminated polysulfones are extended to high molecular weight polysulfones by carbonate, ester, ether or silyl ether linkages.Type: GrantFiled: July 27, 1978Date of Patent: June 23, 1981Assignee: Union Carbide CorporationInventors: James H. Kawakami, George T. Kwiatkowski
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Patent number: 4247354Abstract: Methods of bonding between thermoplastic or thermosetting resins and inorganic oxide substrates are improved by providing to the resin/inorganic oxide interface as an adhesion promoter a combination of (a) a copolymer of an ethylenically unsaturated organic monomer and an unsaturated organosilane containing hydrolyzable groups; and (b) a monomeric hydrolytically reactive organosilane.Type: GrantFiled: August 8, 1979Date of Patent: January 27, 1981Assignee: Union Carbide CorporationInventors: Robert J. Ward, James H. Kawakami, Neil J. McCarthy, Jr.
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Patent number: 4181687Abstract: Bonding between thermoplastic resins and inorganic oxide substrates is improved by providing to the resin/inorganic oxide interface as an adhesion promoter a combination of (a) a copolymer of an ethylenically unsaturated organic monomer and an unsaturated organosilane containing hydrolyzable groups; and (b) a monomeric hydrolytically reactive organosilane.Type: GrantFiled: October 2, 1978Date of Patent: January 1, 1980Assignee: Union Carbide CorporationInventors: Robert J. Ward, James H. Kawakami, Neil J. McCarthy, Jr.
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Patent number: 4172852Abstract: A process is provided for producing a mixture of aromatic sulfonyl chlorides and aromatic sulfones substantially free of the corresponding aromatic sulfonic acids and their anhydrides, which comprises the steps of (a) reacting a monosubstituted benzene such as monochlorobenzene with sulfur trioxide in the presence of at least about 15 mole percent to about 50 mole percent of thionyl chloride, based on the sulfur trioxide, at a temperature from about the freezing point of the reactants to about 40.degree. C.; (b) adding to the reaction mixture of step (a) at least about 60 mole percent thionyl chloride, based on the sulfur trioxide, and preferably a small catalytic amount of dimethylformamide, wherein the total thionyl chloride in the reaction mixture is at least about 110 mole percent, based on the sulfur trioxide, while maintaining the reaction mixture at a temperature between about 25.degree. C. and 70.degree. C.; and then (c) continuing the reaction up to a temperature of about 160.degree. C.Type: GrantFiled: August 15, 1977Date of Patent: October 30, 1979Assignee: Union Carbide CorporationInventors: Wong F. Ark, James H. Kawakami, Ulrich A. Steiner
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Patent number: 4157321Abstract: Copolymer of an ethylenically unsaturated organic monomer and an unsaturated organosilane monomer is stabilized against viscosity increase and gelation by the addition thereto of a monomeric hydrolytically reactive compound chosen from the group consisting of (i) monomeric hydrolytically reactive organosilanes and (ii) trialkyl orthoformates; and an alkyl alcohol.Type: GrantFiled: July 18, 1978Date of Patent: June 5, 1979Assignee: Union Carbide CorporationInventors: James H. Kawakami, Robert J. Ward, Neil J. McCarthy
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Patent number: 4145504Abstract: Carborane-siloxane polymers are conveniently prepared by the polymerization of a carborane disilanol and either a silyl diamine, a ureido-silane, or a silyl dicarbamate. The resulting linear polymers are characterized by relatively high molecular weights and are elastomeric in nature. These gumstocks are compounded with suitable fillers and additives and fabricated into cured elastomeric articles. The carborane-siloxane elastomers exhibit excellent high temperature properties which render them especially useful for a wide variety of applications, such as gaskets, seals, wire and cable insulation and the like.Type: GrantFiled: February 22, 1977Date of Patent: March 20, 1979Assignee: Union Carbide CorporationInventors: Eddie Hedaya, James H. Kawakami, George T. Kwiatkowski