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US 8,206,465 B2Granted
Azo pigments, pigment dispersion, coloring composition, and ink for inkjet recording
AssigneeFUJIFILM Corporation
InventorsNobuo Seto, Keiichi Tateishi
Life of this patent
Estimating the term…
Abstract
An azo pigment showing excellent coloring characteristics such as tinctorial strength and hue and excellent fastness such as light fastness, and a pigment dispersion containing the azo pigment are provided. An azo pigment represented by the following general formula (1) and a pigment dispersion containing the pigment: Wherein Y, G, X1, X2, R1, R2 and R3 are defined in the claims and in the specification.
Claims10
An azo pigment represented by the general formula (1), a tautomer, salt, or hydrate of the azo pigment:
- wherein G1 represents 5- or 6-membered ring together with carbon atoms and a nitrogen atom(s), the heterocyclic ring may be an aromatic ring or a condensed ring;
- Y represents a hydrogen atom or an aliphatic group;
- R1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group;
- R2 and R3 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group;
- X1 represents a nitrogen atom or C—Z, Z represents an electron-withdrawing group having a Hammett σp value of 0.2 or more;
- X2 represents a nitrogen atom or C—R5, R5 represents a hydrogen atom, a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group, or a carboxyl group;
- n represents an integer of from 1 to 4;
- when n=2, the general formula (1) represents a dimer formed through R1, R2, R3, Y, Z, or G;
- when n=3, the general formula (1) represents a trimer formed through R1, R2, R3, Y, Z, or G;
- and
- when n=4, the general formula (1) represents a tetramer formed through R1, R2, R3, Y, Z, or G.
8 more elements
An azo compound represented by the general formula (2) or (2-1):
- wherein
- Y represents a hydrogen atom or an aliphatic group;
- R1 represents an aliphatic group, an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group;
- R21 and R22 each independently represents an aliphatic amino group, an arylamino group, a heterocyclic amino group, an acylamino group, a sulfonamido group, an amino group, or a heterocyclic group;
- Z1 and Z2 each represent an electron-withdrawing group having a Hammett σp value of 0.2 or more;
- X2 represents a nitrogen atom or C—R5, R5 represents a hydrogen atom, a cyano group, a carbamoyl group, an aliphatic oxycarbonyl group, or a carboxyl group;
- R6 represents a hydrogen atom, an aliphatic group, an aryl group, or a heterocyclic group;
- G0 represents an aliphatic group;
- G1 represents a 5- or 6-membered ring together with carbon atoms and a nitrogen atom(s), the heterocyclic ring may be an aromatic ring or a condensed ring;
- Y21 represents a hydrogen atom or a methyl group;
- n represents an integer of from 1 to 4;
- when n=2, the general formula (1) represents a dimer formed through R1, R21, R22, R6, Y, Y21, Z1, Z2, G0, or G1;
- when n=3, the general formula (1) represents a trimer formed through R1, R21, R22, R6, Y, Y21, Z1, Z2, G0, or G1;
- and
- when n=4, the general formula (1) represents a tetramer formed through R1, R21, R22, R6, Y, Y21, Z1, Z2, G0, or G1.
12 more elements
Dependencies are inferred from the claim text.