Pigment dispersion and ink composition using the same

Details Pigment dispersion and ink composition using the same Pigment dispersion and ink composition using the same

2011-04-05

2011-04-05

Wu, David (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S555000, C524S556000, C524S577000, C347S100000, C106S031600

Reexamination Certificate

active

07919545

ABSTRACT:
The present invention provides a pigment dispersion containing at least a pigment at a concentration of from 2 to 50 mass % in the pigment dispersion, and a polymer having from 2 to 50 mass % of repeating units represented by the following formula (1) and from 2 to 40 mass % of repeating units represented by the following formula (2), and having a weight average molecular weight of 10,000 to 500,000. In formula (1), R1represents a hydrogen atom or a methyl group, I represents —CO—, —COO—, etc., R2represents an alkyl group having 1 to 4 carbon atoms. In formula (2), R4represents a hydrogen atom or a methyl group, J represents —CO—, —COO—, etc., R5represents a hydrogen atom, an alkyl group, an aryl group, etc., W represents a single bond or a bivalent linking group, and P represents a heterocyclic residue having a hetero ring contained in an organic pigment.

REFERENCES:
patent: 2008/0241416 (2008-10-01), Shimohara et al.
patent: 2003-026950 (2003-01-01), None
patent: 2003-119414 (2003-04-01), None
patent: 2003-321628 (2003-11-01), None
patent: 2004-018656 (2004-01-01), None
patent: 2004-131589 (2004-04-01), None
patent: 2007-009117 (2007-01-01), None

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