Ink composition for ink jet recording

Patent metadata

Field	Value
Publication number	US-9725610-B2
Application number	US-201514608618-A
Country	US
Kind code	B2
Filing date	Jan 29, 2015
Priority date	Jan 29, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A non-aqueous ink composition for ink jet recording includes a pigment, a compound represented by General formula 1 below, and a phthalocyanine derivative provided with a polar group not having an amine structure, as a pigment dispersant for dispersing the pigment. The pigment is carbon black. The composition further includes an alkylene glycol monoalkyl ether:

(wherein R 1 indicates an alkyl group of 1 to 4 carbon atoms, and R 2 and R 3 each independently indicate a methyl group or an ethyl group).

First claim

What is claimed is:

1. A non-aqueous ink composition for ink jet recording, comprising:
a pigment;
a compound represented by General Formula (1) below; and
a phthalocyanine derivative provided with a polar group not having an amine structure, as a pigment dispersant for dispersing the pigment:

wherein R 1 indicates an alkyl group of 1 to 4 carbon atoms, and R 2 and R 3 each independently indicate a methyl group or an ethyl group.

2. The non-aqueous ink composition for ink jet recording according to claim 1 ,
wherein the pigment is carbon black.

3. The non-aqueous ink composition for ink jet recording according to claim 1 , further comprising an alkylene glycol monoalkyl ether.

4. The non-aqueous ink composition for ink jet recording according to claim 3 ,
wherein the content of the alkylene glycol monoalkyl ether is more than or equal to 1 mass % and less than or equal to 40 mass %, based on the total mass of the non-aqueous ink composition.

5. The non-aqueous ink composition for ink jet recording according to claim 1 ,
wherein the content of the compound represented by General Formula (1) above is more than or equal to 5 mass % and less than or equal to 50 mass %, based on the total mass of the non-aqueous ink composition.

6. The non-aqueous ink composition for ink jet recording according to claim 1 , further comprising at least one resin of a vinyl chloride-based resin and a (meth)acryl-based resin.

7. The non-aqueous ink composition for ink jet recording according to claim 6 ,
wherein the content of the resin is more than or equal to 0.5 mass % and less than or equal to 10 mass %, based on the total mass of the non-aqueous ink composition.

8. The non-aqueous ink composition for ink jet recording according to claim 1 ,
wherein the content of the phthalocyanine derivative is more than or equal to 1 part by mass and less than or equal to 20 parts by mass, based on 100 parts by mass of the pigment.

9. The non-aqueous ink composition for ink jet recording according to claim 1 , further comprising a compound other than the phthalocyanine derivative, as the pigment dispersant.

Assignees

• Seiko Epson Corp

Inventors

• Iida Keiji
• Nagase Makoto
• Kubota Kenichiro
• Sao Akihito

Classifications

• C09D11/36 Primary

  based on non-aqueous solvents · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D133/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers · CPC title

• C08K5/20

  Carboxylic acid amides · CPC title

• C08K5/0091

  Complexes with metal-heteroatom-bonds · CPC title