Patents Examined by John M. Conney, Jr.
  • Patent number: 6642283
    Abstract: Polyurethane article black colorants which comprise a novel blue polymeric anthraquinone colorant, rather than the previous standard polymeric triphenylmethane blue-type colorants are provided. Such a novel blend of colorants to produce black colorations within the target polyurethane foams exhibits very low color degradation within polyurethane foams, primarily due to the stability and resiliency of the novel anthraquinone-based polymeric colorant in the presence of high isocyanate levels, as well as large amounts of reactive tertiary amines (from catalyst residue, for example). A black colorant comprising such a novel blue polymeric colorant, as well as polyurethane foams comprising such a novel black coloring agent and methods of producing such foams are all contemplated within this invention.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: November 4, 2003
    Assignee: Milliken & Company
    Inventors: Mark E. Ragsdale, Sandy G. Belue