Patents by Inventor James L. Paul
James L. Paul 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: 5206308Abstract: Novel oxymethylene graft polymers are obtained by grafting, via Michael addition, an amine functional polymer onto an oxymethylene backbone having pendant acrylate or substituted acrylate ester groups serving as reactive sites for the graft reaction.Type: GrantFiled: March 4, 1991Date of Patent: April 27, 1993Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Patent number: 5071952Abstract: Iodoisocyano, iodourea and oxazole modified 1,3 dioxep-5-ene ring monomers are synthesized and used in copolymerization reactions with trioxane to produce acetal copolymers with backbone functional groups. The invention also concerns processes for the production of acetal copolymers containing iodourea and oxazole functional groups from acetal copolymers with backbone double bonds.Type: GrantFiled: April 13, 1988Date of Patent: December 10, 1991Assignee: Hoechst Celanese CorporationInventors: Nan-Loh Yang, Andrew Auerbach, James L. Paul, Rose Pesce
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Patent number: 5043398Abstract: Novel oxymethylene graft polymers are obtained by grafting a functional compound (i.e., a polymer or compound having one or two hydroxyl, carboxyl, or amine functional groups) onto an oxymethylene backbone having pendant hydroxyl groups which serve as reactive sites for the graft reaction with diisocyanate coupling agents.Type: GrantFiled: May 12, 1989Date of Patent: August 27, 1991Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Patent number: 5034499Abstract: Acetal copolymers of trioxane with epoxy functional groups are obtained by copolymerizing trioxane with 5,6-epoxy-1,3-dioxepane. The epoxide group in the polymer chain provides a highly reacting functional group for further modification. Acetal copolymers with backbone epoxide groups exhibit toughness and thermal stability. The backbone epoxide groups can also be aminated in a one step hydrolysis-amination process.Type: GrantFiled: April 13, 1988Date of Patent: July 23, 1991Assignee: Hoechst Celanese Corp.Inventors: Nan-Loh Yang, Andrew Auerbach, James L. Paul, Yong C. Zheng, Shian S. Wang
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Patent number: 5004798Abstract: Cationic copolymerization of trioxane and trimethylolpropane (TMP) formal or its ester derivatives yields acetal copolymers having pendant functional groups. The TMP formal or ester derivatives of TMP formal may therefore include functional groups selected from hydroxyl or ester moieties which are protected and thus survive the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.Type: GrantFiled: May 12, 1989Date of Patent: April 2, 1991Assignee: Hoechst Celanese CorporationInventors: Jerry A. Broussard, Andrew B. Auerbach, Nan L. Yang, James L. Paul, Yong C. Zheng, Chong L. Zhang
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Patent number: 4983708Abstract: Cationic copolymerization of trioxane with glycidyl ester derivatives, preferably glycidyl acrylate derivatives, produces thermally stable, usually cross-linked, acetal copolymer. The resulting acetal copolymer will exhibit side chain ester functionality, and particularly side chain vinyl functionality when glycidyl acrylate derivatives are employed, so as to permit its futher reaction with other chemical moieties to achieve an acetal copolymer of modified chemical and/or physical properties.Type: GrantFiled: May 12, 1989Date of Patent: January 8, 1991Assignee: Hoechst Celanese CorporationInventors: Nan L. Yang, Andrew Auerbach, Rose. Pesce, Jerry A. Broussard, James L. Paul
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Patent number: 4975518Abstract: Cationic copolymerization of trioxane and 1,2,6-hexanetriol formal (HTF) or its ester derivatives yields acetal copolymers having pendant functional groups. The HTF formal or ester derivatives of HTF may therefore include functional groups selected from hydroxyl or ester moieties which are protected, and thus survive, the copolymerization with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block copolymers and/or to chemically bind modifiers to the acetal copolymer backbone, for example.Type: GrantFiled: May 12, 1989Date of Patent: December 4, 1990Assignee: Hoechst Celanese CorporationInventors: Jerry A. Broussard, Andrew B. Auerbach, James L. Paul
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Patent number: 4975519Abstract: Cationic polymerization of trioxane and a mixture of ester derivatives of .alpha.,.alpha.- and .alpha.,.beta.-isomers of glycerol formal yields acetal terpolymers having pendant functional groups (i.e., ester groups, or hydroxyl groups obtained by hydrolyzing ester groups, pendent from the polymer's backbone). The glycerol formal monomers employed in this invention may include functional groups selected from ester moieties which are protected from, and thus survive, the polymerization process with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block polymers and/or to chemically bind modifiers to the acetal terpolymer backbone, for example.Type: GrantFiled: May 12, 1989Date of Patent: December 4, 1990Assignee: Hoechst Celanese CorporationInventors: Nan L. Yang, Andrew Auerbach, Rose Pesce, Jerry A. Broussard, James L. Paul
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Patent number: 4906728Abstract: The invention concerns a method for producing an acetal copolymer containing backbone bromo-functional groups comprising copolymerizing trioxane with 5,6,-dibromo-1,3-dioxepene. The invention also concerns methods of modifying acetal copolymers containing bromo-functional groups and the copolymers produced by the methods of the invention.Type: GrantFiled: April 13, 1988Date of Patent: March 6, 1990Assignee: Hoechst Celanese Corp.Inventors: Nan-Loh Yang, Andrew Auerbach, James L. Paul, Rose Pesce, Shian S. Wang
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Patent number: 4900783Abstract: Acetal copolymers of trioxane and 1,3-dioxep-5-ene having a high degree of crystallinity and specific mole percent incorporations of 1,3-dioxep-5-ene are synthesized.The invention also provides a process for producing highly crystalline acetal copolymers by copolymerizing triozane and 1,3-dioxep-5-ene and precipitating the copolymer product from solution.The copolymers show much improved stability against halogen degradation.Type: GrantFiled: April 13, 1988Date of Patent: February 13, 1990Assignee: Hoechst Celanese CorporationInventors: Nan-Loh Yang, Andrew Auerbach, James L. Paul, Rose Pesce, Shian S. Wang
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Patent number: 4843115Abstract: An oxymethylene polymer composition which exhibits a reduced tendency to form mold deposits upon molding, reduced tendency to discolor under thermal stress and low extractable formaldehyde levels is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a cyclic amidine compound of the formula: ##STR1## wherein R is phenyl, polynuclear aromatic, heterocyclic, cycloaliphatic and aliphatic containing at least 6 carbon atoms, as well as substituted derivatives of the listed substituents.Type: GrantFiled: February 9, 1988Date of Patent: June 27, 1989Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, James L. Paul, K. M. Natarajan
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Patent number: 4828755Abstract: An electrically conductive polyacetal molding resin composition having improved flexibility and impact strength is provided by formulating an oxymethylene polymer, an electrically conductive carbon black having a surface area, BET N.sub.2 of greater than 1,200 m.sup.2 /g and a pore volume, DBP absorption of greater than 500 cc/100 g, and an elastomeric polyurethane.Type: GrantFiled: February 4, 1988Date of Patent: May 9, 1989Assignee: Hoechst Celanese CorporationInventors: Rajal M. Kusumgar, James L. Paul
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Patent number: 4814493Abstract: This invention describes an improved process for the production of C.sub.1 -C.sub.8 alkyl acrylate by the reaction of a C.sub.1 -C.sub.8 alkyl alcohol with acrylic acid in the presence of esterification catalysts and soluble manganese or cerium ions.Type: GrantFiled: July 5, 1983Date of Patent: March 21, 1989Assignee: Hoechst Celanese CorporationInventors: Edward F. Dougherty, Mark O. Scates, James L. Paul
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Patent number: 4727106Abstract: An oxymethylene polymer composition which exhibits improved thermal stability is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a transition metal salt.Type: GrantFiled: November 18, 1986Date of Patent: February 23, 1988Assignee: Celanese Engineering Resins, Inc.Inventors: James L. Paul, Andrew B. Auerbach
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Patent number: 4507495Abstract: In the process of producing ethyl acrylate by the reaction of ethylene and acrylic acid in the presence of sulfuric acid, using phenolic type inhibitors, soluble manganese or cerium salts are additionally utilized.Type: GrantFiled: July 5, 1983Date of Patent: March 26, 1985Assignee: Celanese CorporationInventors: Edward F. Dougherty, Mark O. Scates, James L. Paul
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Patent number: 4301298Abstract: A normally liquid hydrocarbon having a minimum boiling point of about 425.degree. F. is utilized to provide the liquid seal in a vacuum pump which intakes a gaseous light ends stream resulting from a process for the production of ethyl acrylate by the reaction of ethylene with acrylic acid in the presence of a sulfuric acid catalyst. Upon contact in the vacuum pump, the gaseous light ends are partially absorbed into the normally liquid hydrocarbon, with the normally liquid hydrocarbon being recovered by fractionation.Type: GrantFiled: May 23, 1980Date of Patent: November 17, 1981Assignee: Celanese CorporationInventors: Theodore Horlenko, James L. Paul, James W. Gordon
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Patent number: 4159999Abstract: Olefins are converted to aldehydes and/or alcohols having one more carbon atom than the olefin by reacting the olefin with carbon monoxide and hydrogen in the presence of an in situ formed catalytic complex of a Group VIII metal, carbon monoxide and a trivalent ligand, the metal being introduced into the reaction zone in the form of a solution of a water-soluble inorganic salt dissolved in a solvent comprised of at least 40% by volume of a polyalkylene glycol, the polyalkylene glycol acting as a coupling agent preventing precipitation of the metal prior to formation of the catalyst complex.Type: GrantFiled: November 22, 1974Date of Patent: July 3, 1979Assignee: Celanese CorporationInventors: Adin L. Stautzenberger, James L. Paul, Jerry D. Unruh
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Patent number: 4158020Abstract: Olefins are converted to aldehydes and/or alcohols having one more carbon atom than the olefin by reacting the olefin with carbon monoxide and hydrogen in the presence of an in situ formed catalytic complex of a Group VIII metal, carbon monoxide and a trivalent ligand, the metal being introduced into the reaction zone in the form of a solution of a water-soluble inorganic salt dissolved in a solvent comprised of at least 40% by volume of a polyalkylene glycol, the polyalkylene glycol acting as a coupling agent preventing precipitation of the metal prior to formation of the catalyst complex.Type: GrantFiled: August 26, 1977Date of Patent: June 12, 1979Assignee: Celanese CorporationInventors: Adin L. Stautzenberger, James L. Paul, Jerry D. Unruh
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Patent number: 4151209Abstract: In a process for hydroformylating an olefin in the presence of a catalyst comprising rhodium in complex combination with carbon monoxide and a triorganophosphorus ligand, progressive deactivation of the catalyst, as well as loss of the ligand species through by-product formation, are reduced by continuously stripping the liquid reaction medium to a degree such that the content of high-boiling organophosphorus by-products therein is maintained at a low level such that the ratio of phosphorus contained in said high-boiling by-products to phosphorus contained in the ligand present in the reaction medium does not exceed about 0.2.Type: GrantFiled: October 28, 1977Date of Patent: April 24, 1979Assignee: Celanese CorporationInventors: James L. Paul, Wendell L. Pieper, Leslie E. Wade