Patents by Inventor Asare Nkansah

Asare Nkansah 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).

  • Patent number: 6583228
    Abstract: The present invention relates to novel compositions useful in coating, adhesive, structural, film, sheet, pipe, toys, house siding, asphalt, thermoplastic, elastomer and other applications. The novel compositions comprise copolymers of at least one vinyl and/or vinylidene monomer and at least one high reactivity polyolefin. The copolymers are produced by polymerizing at least one high reactivity polyolefin and at least one vinyl monomer in the presence of a free radical initiator.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: June 24, 2003
    Assignee: BP Corporation North America Inc.
    Inventors: Asare Nkansah, Vahid Bagheri, Lionel Moore
  • Publication number: 20020161156
    Abstract: The present invention relates to novel compositions useful in coating, adhesive, structural, film, sheet, pipe, toys, house siding, asphalt, thermoplastic, elastomer and other applications. The novel compositions comprise copolymers of at least one vinyl and/or vinylidene monomer and at least one high reactivity polyolefin. The copolymers are produced by polymerizing at least one high reactivity polyolefin and at least one vinyl monomer in the presence of a free radical initiator.
    Type: Application
    Filed: October 21, 1998
    Publication date: October 31, 2002
    Inventors: ASARE NKANSAH, VAHID BAGHERI, LIONEL MOORE
  • Patent number: 6344503
    Abstract: A method is disclosed for the preparation of a water-based graft copolymer of a carboxyl functional polyester and an ethylenically unsaturated monomer having a low level of volatile organic compounds.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: February 5, 2002
    Assignee: BP Corporation North America Inc.
    Inventors: Asare Nkansah, Catherine T. McKee, Ajaykumar Desai, Maria Curry-Nkansah
  • Patent number: 6020455
    Abstract: A copolymer containing vinyl-3,4-cyclohexanediol and at least one monomer selected from acrylic acid, methacrylic acid, alkyl acrylate, alkyl methacrylate, styrene, acrylonitrile, butadiene, isoprene, vinyl acetate, maleic anhydride, ethylene, vinyl chloride, vinylidene dichloride, methyl styrene, vinyl toluene, acrylic and methacrylic acid, vinyl acetate, maleic anhydride, fumarate esters, maleate esters, vinylidene difluoride, vinyl fluoride, acrylic or methacrylic esters of the formula (I)H.sub.2 C.dbd.CHCOOR or H.sub.2 C.dbd.CCH.sub.3 COOR (I)where R is a aromatic or aliphatic hydrocarbon group containing 20 or fewer carbons and optionally containing oxygen, sulfur, or phosphorous, and mixtures thereof. A resin composition containing vinyl-3,4-cyclohexanediol, at least one carboxylic acid or ester thereof or anhydride, and optionally a polyol or diol other than vinyl-3,4-cyclohexanediol.
    Type: Grant
    Filed: February 11, 1998
    Date of Patent: February 1, 2000
    Assignee: BP Amoco Corporation
    Inventors: Wayne Robert Pretzer, Matthew Albert Kulzick, Paul Alan Koning, Asare Nkansah, Maria Curry-Nkansah
  • Patent number: 5962580
    Abstract: A method for providing a waterborne coating composition having improved color acceptance is provided. More particularly, a method for improving the color acceptance of a waterborne coating composition containing an emulsion-polymerized addition polymer by incorporating a polymerizable surfactant into the polymer with a certain surface coverage of bound surfactant is provided.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 5, 1999
    Assignee: Rohm and Haas Company
    Inventors: Asare Nkansah, Robert David Solomon, Stewart Orlyn Williams
  • Patent number: 5814374
    Abstract: An aqueous coating composition having low VOC is provided. The invention provides excellent hardness and resistance properties in films formed from binders having glass transition temperatures below ambient temperature. The improvement in film properties comes from the binding of functionalized polyvinyl alcohol to a complementary functionalized latex binder. The low VOC compositions of this invention are useful for a variety of coatings including paints, stains, varnishes, mastics and adhesives.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: September 29, 1998
    Assignee: Rohm and Haas Company
    Inventors: Asare Nkansah, Stewart Orlyn Williams, Richard Foster Merritt
  • Patent number: 5270380
    Abstract: A method for extending the open time of an aqueous coating composition is provided. This method extends the time during which an aqueous coating can be applied or rebrushed without damaging the film. The open time improvement of this invention is useful for a variety of coatings including paints, stains, varnishes, adhesives, and inks. The aqueous coating composition contains a latex polymer and a modifying compound. More particularly, the latex polymer contains a first reactable group which is complementary to and reacts with a second reactable group in the modifying compound. The complementary reactable groups in the latex polymer and modifying compound provide ionic or covalent binding.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: December 14, 1993
    Assignee: Rohm and Haas Company
    Inventors: Linda A. Adamson, Richard F. Merritt, Asare Nkansah, Jungsik Lee