Carbon Bonded Directly To -s(=o)(=o)oh (wherein H May Be Replaced By A Group Ia Or Iia Light Metal, Or By Substituted Or Unsubstituted Ammonium; I.e., Sulfonic Acids And Salts Thereof) Patents (Class 552/112)
  • Colorant compositions
    Patent number: 7097669
    Abstract: Colorant compositions are useful for a wide variety of product applications. For example, colorants are used in tinting of polymers, providing colors to aqueous solution(s), and affording color to solid or semi-solid products such as detergents. Disclosed herein are colorant compositions having a triphenylmethane (“TPM”) derived structure having improved stability to alkaline conditions. Thus, the colorant compositions resist decolorization, even at relatively high pH levels. The colorant compositions of the invention are useful as applied in polyolefins, such as polypropylene and polyethylene, as examples. These colorant compositions also may be employed in thermoplastics, such as PET, for example.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: August 29, 2006
    Assignee: Milliken & Company
    Inventors: Eric B. Stephens, Pat Moore
  • Method for producing aqueous solutions of cationic diarylmethane colorants and triarylmethane colorants
    Patent number: 6533826
    Abstract: Process for preparing aqueous solutions of cationic di- and triarylmethane dyes by the aqueous dye solution, which contains organic solvents, being concentrated by nanofiltration and optionally diluted with water.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: March 18, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Gessner, Gunter-Rudolf Schröder, Robert Reinhardt