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US 8,202,327 B2Granted
Pigment composition, inkjet recording ink, coloring composition for color filter, and color filter
AssigneeFUJIFILM Corporation
InventorsMasahiro Higashi, Yoshihiro Jimbo, Keiichi Tateishi
Life of this patent
Estimating the term…
Abstract
A pigment composition including (A) an azo pigment represented by formula (1), and at least one of (B) a coloring agent represented by formula (2), or (C) at least one additive represented by formula (3) or an additive represented by formula (4).
Claims8
A pigment composition comprising:
- (A) an azo pigment represented by formula (1):
- wherein
- R1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group;
- R2 represents a substituent;
- R55 represents a substituent;
- R56 represents a hydrogen atom or a substituent;
- Z represents an electron-withdrawing group having a Hammett constant σp of 0.2 or greater;
- m represents an integer of 0 to 5;
- n represents an integer of 1 to 4;
- when n is 2 to 4, the compound is a dimer, trimer, or tetramer formed via R1, R2, R55, R56, or Z;
- and
- formula (1) has no ionic hydrophilic group, and
- at least one of (B) a coloring agent represented by formula (2), or (C) at least one additive represented by formula (3) or an additive represented by formula (4):
- wherein
- R1, R2, R56, Z, m, and n are as defined above:
- wherein
- G2 represents a hydrogen atom, an aliphatic group, an aryl group, or a heterocyclic group;
- R21 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group;
- R22 represents a substituent;
- m is as defined above;
- and
- formula (3) has no ionic hydrophilic group:
- wherein
- R60 represents a hydrogen atom or a substituent;
- R58 and R59 each independently represent a hydrogen atom or a substituent;
- and
- R58 and R59 may be taken together to form a 5- or 6-membered ring.
24 more elements
Dependencies are inferred from the claim text.