At Least Three -c(=x)hnh Groups, Wherein Substitution May Be Made For Hydrogen Only Patents (Class 534/867)
  • Process for preparing fine pigment dispersions
    Patent number: 6211347
    Abstract: Preparation of pigment dispersions by a1) subjecting a mixture A comprising a latent pigment and a polymer to thermal, chemical or photolytic treatment and b) then adding a solvent, or a2) subjecting a mixture B comprising a latent pigment, a polymer and a solvent to thermal, chemical or photolytic treatment, new pigment dispersions and new latent pigments, their use in the process according to the invention for preparing the fine pigment dispersions and the use of the dispersions according to the invention for pigmenting high molecular mass material, including color filters.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: April 3, 2001
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Werner Sieber, Véronique Hall-Goulle
  • Azo compounds and process for producing the same
    Patent number: 5973126
    Abstract: A monoazo compound synthesized using 2-hydroxynaphthalene-3,6-dicarboxylic acid (or salt thereof), an amide, an ureide or an ester thereof as a coupler is novel, and is superior in water resistance, chemical resistance and solvent resistance. The present invention provides such a novel azo compound and a process for producing the same.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: October 26, 1999
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
    Inventors: Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori
  • Basic azo dyes with a coupling component of the hydroxynaphthalenecarboxylic acid series
    Patent number: 5286854
    Abstract: Basic azo dyes useful for dyeing or printing polymeric material have the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkanoylamino,R.sup.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or a radical of the formula CO-X, andX is hydroxyl, C.sub.1 -C.sub.4 -alkoxy, amino, mono- or di(C.sub.1 -C.sub.6 -alkyl)amino or a radical of the formula ##STR2## where n is 0 or 1,R.sup.3, R.sup.4 and R.sup.5 are hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl,R.sup.6 is hydrogen or C.sub.1 -C.sub.4 -alkyl,L is C.sub.2 -C.sub.6 -alkylene, andAn.sup..crclbar. is one equivalent of an anion,with the proviso that at least one basic or quaternary radical is present in the molecule.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: February 15, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Erwin Hahn, Heidi Hengelsberg, Udo Mayer
  • Phenyl-azo-hydroxynaphthoic acid amide pigments containing at least one carbonamide group
    Patent number: 4737581
    Abstract: Azo compounds of the formula I ##STR1## wherein X is --H, --CH.sub.3, --CF.sub.3, --NO.sub.2, --COOR.sub.1, --NHCOR.sub.2 or --COHN.sub.2, and R.sub.1 and R.sub.2 are as defined in claim 1, are suitable for pigmenting high-molecular organic material.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: April 12, 1988
    Assignee: Ciba-Geigy Corporation
    Inventor: Stefan Hari