# US 7,745,506 B2 · UV-curable ink-jet ink, electronic circuit board, electronic component and display device

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- Number: US 7,745,506 B2
- Document ID: US7745506B2
- Status: Granted
- Kind: B2
- Application number: 11/776,091
- Filed: 2007-07-11
- Published: 2008-02-14
- Granted: 2010-06-29
- Earliest claimed: 2006-08-11
- Assignees: Chisso Corporation
- Inventors: Hiroyuki Satou; Setsuo Itami; Fumitaka Ooizumi; Toshiyuki Takahashi
- Web page: https://patentgrep.com/patent/US7745506B2

## CPC

- C08F 2/48: by ultraviolet or visible light
- C09D 4/00: 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}
- C09D 11/101: Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
- C09D 11/30: Inkjet printing inks
- Y10T 428/31797: Next to addition polymer from unsaturated monomers
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A UV-curable ink-jet ink is provided, which has a high sensitivity and allows soft and highly fine patterns to be formed. The UV-curable ink-jet ink includes a mono-functional polymerizable monomer (A) having a hydroxyl group, a di(meth)acrylate ester (B) and a photo-polymerization initiator (C).

## Claims

### Claim 1

A UV-curable ink-jet ink, comprising a mono-functional polymerizable monomer (A) having a hydroxyl group, a di(meth)acrylate ester (B) and a photo-polymerization initiator (C), wherein the mono-functional polymerizable monomer (A) having a hydroxyl group is a compound of formula (1):
wherein R1 is a C4-C12 alkylene group which is a straight chain or has a ring structure, R2 is a C1-C3 alkyl group or hydrogen, and n is an integer of 1-30.

### Claim 2 (depends on 1)

The UV-curable ink-jet ink of claim 1, wherein the di(meth)acrylate ester (B) is one or more selected from the group consisting of diacrylate modified by bisphenol-F ethylene oxide, diacrylate modified by bisphenol-A ethylene oxide, diacrylate modified by ethylene oxide isocyanurate, polyethyleneglycol diacrylate, polypropyleneglycol diacrylate, pentaerythritol diacrylate, pentaerythritol diacrylate monostearate, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,9-nonanediol diacrylate, 1,4-cyclohexanedimethanol diacrylate, 2-n-butyl-2-ethyl-1,3-propanediol diacrylate, trimethyloipropane diacrylate and dipentaerythritol diacrylate.

### Claim 3 (depends on 1)

The UV-curable ink-jet ink of claim 1, wherein the di(meth)acrylate ester (B) is one or more selected from the group consisting of diacrylate modified by bisphenol-F ethylene oxide, diacrylate modified by bisphenol-A ethylene oxide and diacrylate modified by ethylene oxide isocyanurate.

### Claim 4 (depends on 1)

The UV-curable ink-jet ink of claim 1, wherein the mono-functional polymerizable monomer (A) having a hydroxyl group is 4-hydroxybutyl (meth)acrylate or 1,4-cyclohexanedimethanol mono(meth)acrylate, the di(meth)acrylate ester (B) is one or more selected from the group consisting of diacrylate modified by bisphenol-F ethylene oxide, diacrylate modified by bisphenol-A ethylene oxide and diacrylate modified by ethylene oxide isocyanurate, and the photo-polymerization initiator (C) is 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)- 1-butanone.

### Claim 5 (depends on 1)

The UV-curable ink-jet ink of claim 1, further comprising a compound (D) having two or more oxirane groups or oxetane groups.

### Claim 6 (depends on 5)

The UV-curable ink-jet ink of claim 5, wherein the compound (D) having two or more oxirane groups or oxetane groups is one or more selected from compounds of formulae (7), (8), (9) and (10):
wherein in formula (7), m is an integer of 0-10.