Ultraviolet curable type ink-jet ink composition, recording method and recording apparatus using the same

Patent metadata

Field	Value
Publication number	US-9458338-B2
Application number	US-201514708325-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	Nov 9, 2010
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Provided is a UV curable type ink-jet ink composition containing a monomer A which is expressed by the following general formula (I):

CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3   (I)
(in the formula, R 1 is a hydrogen atom or methyl radical, R 2 is a bivalent organic residue radical having a carbon number in a range of 2 to 20, and R 3 is a hydrogen atom or a univalent organic residue radical having a carbon number in a range of 1 to 11), a compound B containing five or more (meth)acryloyl radicals per molecule, and a monofunctional (meth)acrylate C having an aromatic ring skeleton, wherein the monofunctional (meth)acrylate C which is in a range of 5 to 35 wt % with respect to the total weight of the ink composition is contained.

First claim

What is claimed is:

1. A UV curable type ink composition containing a polymerizable compound and a photopolymerization initiator,
wherein the polymerizable compound contains a monomer A which is in a range of 40 to 90 wt % with respect to the total amount of the ink composition and expressed by the following general formula (I):
CH 2 ═CR 1 —COOR 2 —O—CH═CH—R 3   (I)

(in the formula, R 1 is a hydrogen atom or methyl radical, R 2 is a bivalent organic residue radical having a carbon number in a range of 2 to 20, and R 3 is a hydrogen atom or a univalent organic residue radical having a carbon number in a range of 1 to 11), and
wherein the photopolymerization initiator contains an acylphosphine oxide which is in a range of 7 to 12 wt % with respect to the total amount of the ink composition, and the acylphosphine oxide contains at least a mono acylphosphine oxide and a bisacylphosphine oxide, and wherein the contained amount of the mono acylphosphine oxide is in a range of equal to or more than 50 wt % with respect to the total amount of the acylphosphine oxide.

2. The UV curable type ink-jet ink composition according to claim 1 , wherein the curing is performed through illumination of ultraviolet rays of which the light emitting peak wavelength is in a range of 350 to 420 nm with an illumination energy of equal to or less than 300 mJ/cm 2 .

3. The UV curable type ink-jet ink composition according to claim 1 , wherein viscosity at 20° C. is in a range of 3 to 30 mPa·s.

4. An ink jet recording method of ejecting the UV curable type ink-jet ink composition according to claim 1 on a recording medium and curing the ejected UV curable type ink-jet ink composition through illumination using a UV-LED of which the light emitting peak wavelength is in a range of 350 to 420 nm.

5. The UV curable type ink composition according to claim 1 , wherein the monomer A is acrylic acid 2-(vinyloxyethoxy) ethyl.

6. The UV curable type ink composition according to claim 1 , wherein the photopolymerization initiator further contains a thioxanthone compound which is in a range of 0.5 to 5 wt % with respect to the total amount of the ink composition.

7. The UV curable type ink composition according to claim 1 , wherein the thioxanthone compound is 2,4-diethyl thioxanthone.

8. The UV curable type ink composition according to claim 1 , wherein a phenoxyethyl (meth)acrylate which is in a range of 10 to 50 wt % with respect to the total amount of the ink composition is contained as the polymerizable compound.

Assignees

• Seiko Epson Corp

Inventors

• Kagose Taketoshi
• Nakane Hiroki
• Sato Chigusa
• Kida Hiroaki
• Saito Toru

Classifications

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• B41J2/2107

  characterised by the ink properties (supplying ink in a solid state B41J2/17593) · CPC title