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Pigment compositions and processes therefor

  • US 4,444,592 A
  • Filed: 11/15/1982
  • Issued: 04/24/1984
  • Est. Priority Date: 06/02/1981
  • Status: Expired due to Fees
First Claim
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1. Blue pigments which comprise the reaction product obtained by dissolving and/or dispersing an essentially water-insoluble aryl pararosaniline in an effective amount of at least one acid solvent and reacting with an approximately chemically equivalent amount of at least one heteropoly acid containing molybdenum and/or tungsten;

  • wherein said aryl pararosaniline has the following structure in its carbinol form;

    ##STR3## wherein R1, R2 and R3 are direct linkages, phenyl, or napthyl groups;

    R4 is hydrogen or methyl;

    X1, X2 and X3 are hydrogen, halogen, nitro, alkyl of 1 to 4 carbons or alkoxy of 1 to 4 carbons;

    provided that at least one of R1, R2 and R3 is not a direct linkage and provided that X1, X2 or X3 is hydrogen when the corresponding R1, R2 or R3 is a direct linkage.

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