Patents Represented by Attorney, Agent or Law Firm William T. Jackson
  • Process for decolorizing vinyl aromatic conjugated diene copolymers
    Patent number: 6184341
    Abstract: A process for eliminating color from vinyl aromatic/conjugated diene copolymers which process comprises treating the copolymers with a monocarboxylic acid having general formula R—COOH, where R is a hydrocarbon radical comprising 2 to 4 carbon atoms and R further comprises linear or branched aliphatic radicals, cycloaliphatic radicals, alkenic radicals, aromatic radicals or alkylaromatic radicals.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 6, 2001
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau