Patents by Inventor Kenneth William Powers

Kenneth William Powers 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).

  • Solid nucleophilic reagent for conversion of benzylic halogen functionality on polymers to other functionalities
    Patent number: 6372858
    Abstract: A solid nucleophilic reagent for the conversion of benzylic halogen functionality on polymers to other functionalities, and methods of making and using the same.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: April 16, 2002
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Chia S. Chee, Hsien-Chang Wang, Kenneth William Powers
  • Thermoplastic blend containing engineering resin
    Patent number: 6346571
    Abstract: A thermoplastic composition which may be unvulcanized or vulcanized is provided which comprises a polymer blend of an elastomeric thermoplastic engineering resin and a halogen-containing copolymer of a C4 to C7 isomonoolefin and a para-alkylstyrene. A process for preparing a dynamically vulcanized composition is also provided.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: February 12, 2002
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Narayanaswami Raja Dharmarajan, Robert Chester Puydak, Hsien Chang Wang, Kenneth William Powers, Thomas Chen-Chi Yu, Donald Ross Hazelton
  • Impact modification of polyamides
    Patent number: 6303691
    Abstract: The invention relates to impact modifiers for polyamide compositions which improve the impact strength of the polyamides without adversely affecting the flexural modulus of the composition. The impact modifiers comprise blends of halogenated copolymers of a C4 to C7 isomonoolefin and an alkyl/styrene with a polyolefin.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: October 16, 2001
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Thomas Chen-chi Yu, Kenneth William Powers, Hsien Chang Wang
  • Solid nucleophilic reagent for conversion of benzylic halogen functionality on polymers to other functionalities
    Patent number: 6156810
    Abstract: A solid nucleophilic reagent for the conversion of benzylic halogen functionality on polymers to other functionalities, and methods of making and using the same.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: December 5, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Chia S. Chee, Hsien-Chang Wang, Kenneth William Powers
  • Thermoplastic blend containing engineering resin
    Patent number: 6013727
    Abstract: A thermoplastic composition which may be unvulcanized or vulcanized is provided which comprises a polymer blend of an elastomeric thermoplastic engineering resin and a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene. A process for preparing a dynamically vulcanized composition is also provided.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: January 11, 2000
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Narayanaswami Raja Dharmarajan, Robert Chester Puydak, Hsien Chang Wang, Kenneth William Powers, Thomas Chen-Chi Yu, Donald Ross Hazelton
  • Process for selective bromination of para-alkylstyrene/isoolefin copolymers
    Patent number: 5959049
    Abstract: A process for producing a copolymer of isoolefin having between 4 and 7 carbon atoms and para-alkylstyrene is provided. The process comprises admixing the isoolefin and the para-alkylstyrene in a copolymerization reactor under copolymerization conditions in the presence of a diluent, and a Lewis Acid catalyst, and maintaining the copolymerization reactor substantially free of impurities which can complex with the catalyst or copolymerize with the isoolefin or the para-alkylstyrene.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: September 28, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventors: Kenneth William Powers, Hsien-Chang Wang
  • Interpolymer cures of blends comprising halogenated isoolefin/para-alkylstyrene elastomers and unsaturated elastomers
    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
  • Process for selective bromination of para-alkylstyrene/isoolefin copolymers
    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