Heat stable laked monoazo pigment compositions
AssigneeEngelhard Corporation
InventorAmrit Pal Bindra
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Abstract
Disclosed are red shade yellow compositions characterized by the formula: ##STR1## wherein X is a lower alkyl or a --COOR.sub.1 group; wherein R.sub.1 is a hydrogen or lower alkyl group; each Y is independently a lower alkyl, lower alkyloxy or halogen group; a is 0, 1, or 2; and M is a divalent metal. Also disclosed is a process for preparing red shade yellow pigment compositions prepared by initially a diazonium component comprised of one or more aromatic amines wherein at least one of said amines is a 1-sulfo-2-naphthylamine; and thereafter coupling the diazonium component with a coupling component comprised of a pyrazolone coupler to form a dye, and metallizing said dye with at least one divalent metal.
Claims24
A red shade yellow pigment composition comprising one or more compounds having the formula:
- ##STR14## wherein X is a lower alkyl group containing 1 to 4 carbon atoms or a --COOR.sub.1 group;
- wherein R.sub.1 is a hydrogen or lower alkyl group containing 1 to 4 carbon atoms;
- each Y is independently a lower alkyl group containing 1 to 4 carbon atoms, lower alkyloxy group containing 1 to about 4 carbon atoms or halogen group;
- a is 0, 1, or 2;
- and M is a divalent metal.
A red shade yellow pigment composition comprising one or more compounds having the formula:
- ##STR15## wherein X is a lower alkyl group containing 1 to 4 carbon atoms;
- and M is a divalent metal.
A process for preparing a red shade yellow pigment composition which comprises making an azo dye by coupling (i) a diazonium component comprised of one or more aromatic amines wherein at least one of said amines is a 1-sulfo-2-naphthylamine having the formula:
- ##STR16## and salts thereof;
- with (ii) at least one coupling component having the formula:
- ##STR17## and salts thereof;
- wherein X is a lower alkyl group containing 1 to 4 carbon atoms or a --COOR.sub.1 group;
- wherein R.sub.1 is a hydrogen or lower alkyl group containing 1 to 4 carbon atoms;
- each Y is independently a lower alkyl group containing 1 to 4 carbon atoms, lower alkyloxy group containing 1 to about 4 carbon atoms or halogen group;
- a is 0, 1, or 2;
- and M is a divalent metal.
Dependencies are inferred from the claim text.