Patents Represented by Attorney Myron B. Kurtzman
  • Patent number: 5840810
    Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Na, K, Rb, Cs alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to the metalated polymer solution; also provided are the metalated copolymers and the functionalized derivatives therefrom.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: November 24, 1998
    Assignees: Exxon Chemical Patents Inc, Cornell Research Foundation Inc.
    Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim H. G. Steinke, Hsien-Chang Wang
  • Patent number: 5824717
    Abstract: The invention relates to peroxide- or radiation-curable copolymer containing compositions and to the resulting radiation- or peroxide- cured compositions. The compositions may optionally contain a reinforcing filler. Copolymers employed in the compositions are acrylate modified copolymers of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomers. Since the percentage of extractables from the cured composition is negligible, the cured compositions are suitable for use in the manufacture of a variety of high purity rubber goods used in the pharmaceutical and health care industries. In addition, the compositions may be employed as condenser packings and as food contact materials or wire cable insulation materials. Further, the cured composition may be employed in the manufacture of high purity hoses.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 20, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Natalie Ann Merrill, Hsien-Chang Wang, Anthony Jay Dias
  • Patent number: 5821308
    Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: October 13, 1998
    Assignees: Exxon Chemical Patents Inc, Cornell Research Foundation
    Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang
  • Patent number: 5814707
    Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: September 29, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jean M.J. Frechet, Shah A. Haque, Hsien-Chang Wang
  • Patent number: 5814708
    Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: September 29, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jean M.J. Frechet, Shah A. Haque, Hsien-Chang Wang
  • Patent number: 5807931
    Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: September 15, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
  • Patent number: 5698640
    Abstract: Tire curing bladders are made from poly(isobutylene-co-4-bromomethylstyrene) with a benzylic bromine content of from 0.15 to 0.45 mole percent, vulcanized with a cure system of 1,6-hexamethylene-bis(sodium thiosulfate) and zinc oxide. The vulcanizate has low residual benzylic bromine content which leads to enhanced stability under severe duty applications, reduced hot tension set, and reduced adhesion or co-cure to halobutyl tire innerliners.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: December 16, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Ilan Duvdevani, Neil Frederick Newman
  • Patent number: 5684077
    Abstract: A composition suitable for use in producing mold curing elements is provided. The composition comprises a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene; a filler such as carbon black, a process oil, and a curing agent. A curing element comprising the composition is also provided.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: November 4, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Donald Sheley Tracey, Irwin Jerome Gardner, Bernard Jean Costemalle
  • Patent number: 5681899
    Abstract: The invention relates to impact modifiers for polyamide compositions which improve the impact strength of the polyamides without adversely affecting the flexural modules of the composition. The impact modifiers comprise blends of general purpose rubbers and a halogenated copolymer of a C.sub.4 to C.sub.7 isomonoolefin and an alkylstyrene. In addition, the invention is drawn to a polyamide composition containing such impact modifiers.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: October 28, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Hsien-Chang Wang, Dongming Li, Thomas Chen-Chi Yu
  • Patent number: 5681901
    Abstract: A process for halogenating a copolymer of a C.sub.4 to C.sub.7 isomonoolefin, e.g. isobutylene, and a multiolefin, e.g. isoprene or a para-alkylstyrene, e.g., para-methylstyrene, is disclosed. Increased halogenation efficiency and decreased reaction time is achieved by conducting the reaction in the presence of a halogen source and an aqueous emulsion containing a water soluble oxidizing agent, e.g. hydrogen peroxide, which oxidizes hydrogen halide generated in-situ in the reaction back to free halogen.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: October 28, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Neil Frederick Newman
  • Patent number: 5679748
    Abstract: This invention provides a method by which an alkylstyrene containing polymer may be exclusively functionalized at the primary benzylic carbon site of the styrenic monomer. The process of this invention comprises the treatment of an alkylstyrene containing polymer dissolved in a non-polar liquid medium with an organic hydroperoxide oxidizing reagent in the presence of a catalytically sufficient amount of a chromium compound, to oxidize a portion of the aromatic alkyl groups of the polymer to an oxygen containing functional group.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: October 21, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jean M. J. Frechet, Shah A. Haque, Hsien-Chang Wang
  • Patent number: 5670581
    Abstract: There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 23, 1997
    Assignees: Exxon Chemical Patents Inc., Cornell Research Foundation, Inc.
    Inventors: Jean M. J. Frechet, Shah A. Haque, Joachim Hans Georg Steinke, Hsien-Chang Wang
  • Patent number: 5670582
    Abstract: A process for halogenating a copolymer of a C.sub.4 -C.sub.7 isomonoolefin, eg. isobutylene, and a para-alkylsyrene, e.g., para-methylstyrne, is disclosed. Increased halogenation efficiency is achieved by conducting the reaction under free radical halogenation conditions and in the presence of an oxidizing agent, e.g. hydrogen peroxide, which oxidizes hydrogen halide generated in-situ in the reaction back to free halogen. The oxidizing agent is preferably not added to the reaction medium until after first stage halogenation is substantially completed.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: September 23, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: David Yen-Lung Chung, Neil Frederick Newman
  • Patent number: 5665183
    Abstract: A tire inner-liner, comprising a solid rubber and a complex, said complex comprising a reactive rubber and a layered silicate clay uniformly dispersed therein. The complex comprising the clays significantly improve the low air permeability of the tire inner-liner without adversely affecting the rubber composition.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 9, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Edward Nathan Kresge, David John Lohse
  • Patent number: 5656694
    Abstract: Vulcanizable blends containing a halogenated copolymer of a C.sub.4 -C.sub.7 isomonoolefin and para-alkylstyrene mixed with one or more olefinically unsaturated elastomeric polymers are disclosed. Cure is preferably effected using zinc stearate as a curative at levels below about 3.0 phr which gives rise to vulcanizates having selective interpolymer addition of benzylic halogen present in the halogenated copolymer to the double bond of the unsaturated polymer with no significant self curing of the halogenated polymer taking place.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: August 12, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jean M. J. Frechet, Dongming Li, Kenneth William Powers, Hsien-Chang Wang, Donald Andrew White
  • Patent number: 5654379
    Abstract: A process for the bromination of a copolymer of an isoolefin having from 4 to 7 carbon atoms and a para-alkystyrene comprising bromating the copolymer in the presence of bromine and a radical initiator thereby providing a brominated copolymer of the copolymer. The brominated copolymer is substantially free of ring bromine and backbone bromine.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: August 5, 1997
    Assignee: Exxon Chemicals Patent, Inc.
    Inventors: Kenneth William Powers, Hsien-Chang Wang
  • Patent number: 5633321
    Abstract: Method for producing a compatabilized rubber composition comprising blending a hydroxy alkylamine or a hydroxy alkylthioether functionalized polymer of a C.sub.4 -C.sub.7 isoolein and para-alkylstyrene with a dissimilar polymer.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: May 27, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Palanisamy Arjunan
  • Patent number: 5633394
    Abstract: Compounds useful as catalyst components for olefin polymerization. The compounds comprise derivatives of cyclopentadienyl complexes of the ZR or HF.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: May 27, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Howard C. Welborn, Jr., John A. Ewen
  • Patent number: 5631316
    Abstract: Vulcanizable tire innerliner compositions are described which are essentially free of halogen atoms or contain a reduced halogen content. The innerliners contain a saturated elastomeric interpolymer of a C.sub.4 -C.sub.7 isomonoolefin, e.g., isobutylene and a para-alkylstyrene e.g., para-methylstyrene, which contains benzylic ester functionality having the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1, to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.Innerliners of the invention provide excellent impermeability to air, heat aging properties and good adhesion to tire carcass stock required for tire innerliners, and are also essentially free of halogen or contain low halogen content thereby reducing environmental concerns occasioned by the incineration of used tires.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 20, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Bernard J. Costemalle, James V. Fusco, Pierre T. Hous, Hsien-Chang Wang
  • Patent number: 5621044
    Abstract: Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an ethylene propylene elastomers copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 15, 1997
    Assignee: Exxon Chemicals Patents, Inc.
    Inventor: Hsien-Chang Wang