Solvent-based ink jet ink composition

Patent metadata

Field	Value
Publication number	US-9758686-B2
Application number	US-201615045444-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Feb 18, 2015
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A solvent-based ink jet ink composition includes a coloring material; and a solvent; in which the composition includes, as the solvent, two or more types of solvent that are compounds represented by the following general formula (1), and R 1 , R 2 , and R 3 have the same structure as one another and m are consecutive integers, in the solvent.

R 1 O—(R 2 O) m —R 3   (1)

(in the formula, R 1 is a hydrogen atom or an alkyl group with 1 to 6 carbon atoms, R 2 is an alkylene group with 2 or 3 carbon atoms, and R 3 is a hydrogen atom, an acetyl group, or an alkyl group with 1 to 4 carbon atoms. However, both of R 1 and R 3 are not hydrogen atoms. m is an integer of 1 to 7).

First claim

What is claimed is:

1. A solvent-based ink jet ink composition, comprising:
a coloring material; and
a solvent,
wherein the composition includes, as the solvent, two or more types of solvent that are compounds represented by the following general formula (1), and R 1 , R 2 , and R 3 have the same structure as one another and m are consecutive integers, in the solvent:
R 1 O—(R 2 O) m —R 3   (1)

wherein, in the formula, R 1 is a hydrogen atom or an alkyl group with 1 to 6 carbon atoms, R 2 is an alkylene group with 2 or 3 carbon atoms, and R 3 is a hydrogen atom, an acetyl group, or an alkyl group with 1 to 4 carbon atoms;
both of R 1 and R 3 are not hydrogen atoms;
m is an integer of 1 to 7; and
wherein two or more types of solvent in which one of R 1 and R 3 in the general formula (1) is a hydrogen atom and another is an alkyl group are included as the two or more types of solvent.

2. The solvent-based ink jet ink composition according to claim 1 ,
wherein two or more types of solvent in which the number of carbon atoms in R 2 in the general formula (1) is 2 are included as the two or more types of solvent.

3. The solvent-based ink jet ink composition according to claim 1 ,
wherein three or more types of solvent in which m in the general formula (1) are continuously consecutive integers are included as the two or more types of solvent.

4. The solvent-based ink jet ink composition according to claim 3 ,
wherein n continuously consecutive types of solvent (n is an integer of 3 or more) are included, an integer in which the decimal of n/3 is rounded down is A, and the ratio (X) of the total content of the remaining solvent in the ink, excluding the Ath solvent in which m increases from the solvent with the smallest m and the Ath solvent in which m decreases from the largest m of the n types of solvent to the total content of the n types of solvent in the ink is 40 mass % or more.

5. The solvent-based ink jet ink composition according to claim 1 ,
wherein the total content of the two or more types of solvent is 2 mass % or more to 50 mass % or less when the total mass of the ink composition is 100 mass %.

6. The solvent-based ink jet ink composition according to claim 1 , further comprising:
a lactone as the solvent.

7. The solvent-based ink jet ink composition according to claim 1 ,
wherein one type selected from a group consisting of an organic pigment, a metal oxide pigment, and carbon black is included as the coloring material.

Assignees

• Seiko Epson Corp

Inventors

• Nagase Makoto
• Kubota Kenichiro
• Ito Jun
• Koike Naoki

Classifications

• C09D11/10

  based on artificial resins · CPC title

• C09D11/36 Primary

  based on non-aqueous solvents · CPC title

• C09D11/322

  Pigment inks · CPC title