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US 6,548,703 B1Granted
Toning agent
AssigneeKabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
InventorsRyuzo Ueno, Masaya Kitayama, Kenji Minami, Masamitsu Kubotsu
Life of this patent
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Abstract
A toning agent for an azo pigment, an azo pigment with a modified tone, and process for preparing the same are provide. 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is admixed with a primary coupler component for an azo pigment and the mixed coupler composition and an aromatic diazonium are coupled.
Claims6
A mixed coupler composition consisting essentially of:
- a) a hydroxynaphthalene monocarboxylic acid or a derivative thereof, and
- b) a compound having the formula [1]:
- wherein
- Y is —(CONH)n-X or —COR,
- Y1 is —(CONH)n-X1 or —COR1,
- wherein X and X1 are optionally branched alkyl groups having 1-20 carbon atoms, optionally substituted aromatic groups, or optionally substituted heterocyclic groups having conjugated double bonds,
- n is an integer of 1 or 2,
- R and R1 are hydroxy groups, optionally branched alkoxy groups having 1-6 carbon atoms, benzyloxy groups, phenyloxy groups or phenacyloxy groups, provided that when either R or R1 is a hydroxy group, said group may optionally form an acceptable salt,
- R2 is a hydrogen atom, an optionally branched alkyl group having 1-6 carbon atoms, an acyl group having 1-6 carbon atoms or a phenyl alkyl group.
6 more elements
A mixed coupler composition comprising:
- a) a hydroxynaphthalene monocarboxylic acid or a derivative thereof, and
- b) a compound having the formula [1]:
- wherein
- Y is —(CONH)n-X or —COR,
- Y1 is —(CONH)n-X1 or —COR1,
- wherein X and X1 are optionally branched alkyl groups having 1-20 carbon atoms, optionally substituted aromatic groups, or optionally substituted heterocyclic groups having conjugated double bonds,
- n is an integer of 1 or 2,
- R and R1 are hydroxy groups, optionally branched alkoxy groups having 1-6 carbon atoms, benzyloxy groups, phenyloxy groups or phenacyloxy groups, provided that when either R or R1 is a hydroxy group, said group may optionally form an acceptable salt,
- R2 is a hydrogen atom, an optionally branched alkyl group having 1-6 carbon atoms, an acyl group having 1-6 carbon atoms or a phenyl alkyl group.
6 more elements
Dependencies are inferred from the claim text.