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Electrostatographic toner containing magenta pigment

  • US 5,283,147 A
  • Filed: 05/27/1992
  • Issued: 02/01/1994
  • Est. Priority Date: 05/27/1992
  • Status: Expired due to Fees
First Claim
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1. A dry, particulate electrostatographic toner composition comprising a binder polymer having mixed therewith a magenta pigment which is a coordination complex of a divalent or trivalent metal ion and a 6-arylazo-3-pyridinol compound having the structure:

  • ##STR3## wherein R is selected from the group consisting of OH;

    NH2 ; and

    an alkyl group containing from 1 to about 6 carbon atoms;

    R1 is selected from the group consisting of hydrogen;

    an alkyl group having 1 to about 6 carbon atoms;

    acyl;

    aryl;

    aralkyl;

    alkylsulfonyl;

    amino;

    alkoxy;

    halogen;

    morpholino;

    phenylsulfamoyl;

    sulfonamido;

    sulfamoyl;

    carboxy and sulfo; and

    hydrolyzable precursors thereof; and

    R2 is a complex-forming substituent selected from the group consisting of COOH;

    a hydrolyzable ester group of the formula COOR3 wherein R3 is an alkyl group having from 1 to about 8 carbon atoms or an aryl group having 6 to about 10 carbon atoms; and

    sulfamoyl having the formula SO2 NHR4 wherein R4 is hydrogen, alkyl having 1 to about 8 carbon atoms, aryl having 6 to about 10 carbon atoms or carbacyl having 1 to about 8 carbon atoms;

    said toner having an average particle size within the range of from about 0.1 to about 100 microns.

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