# US 2010/0168322 A1 · Inkjet recording liquid

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- Number: US 2010/0168322 A1
- Document ID: US20100168322A1
- Status: Published application
- Kind: A1
- Application number: 12/642,465
- Filed: 2009-12-18
- Published: 2010-07-01
- Earliest claimed: 2008-12-26
- Inventors: Masao IKOSHI; Kaoru Tojo
- Web page: https://patentgrep.com/patent/US20100168322A1

## CPC

- C09D 139/06: Homopolymers or copolymers of N-vinyl-pyrrolidones
- C09D 11/322: Pigment inks
- 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)

## Abstract

The invention provides an inkjet recording liquid containing at least: water; a colorant; a water-soluble solid compound having the molecular weight of 80 or more but less than 1,600 and having a solubility parameter value of 20 or more; and a water-soluble solvent having a solubility parameter value of less than 27.5, the ratio of the content of the water-soluble solvent to the content of the water-soluble solid compound being in the range of from 1.0 to 10.0.

## Claims

### Claim 1

An inkjet recording liquid, comprising:
water;
a colorant;
a water-soluble solid compound having the molecular weight of 80 or more but less than 1,600 and having a solubility parameter value of 20 or more; and
a water-soluble solvent having a solubility parameter value of less than 27.5,
the ratio of the content of the water-soluble solvent to the content of the water-soluble solid compound being in the range of from 1.0 to 10.0.

### Claim 2 (depends on 1)

The inkjet recording liquid of claim 1, wherein the sum of the content of the water-soluble solid compound and the content of the water-soluble solvent is from 10 weight % to 30 weight %.

### Claim 3 (depends on 1)

The inkjet recording liquid of claim 1, wherein the water-soluble solid compound comprises at least one selected from the group consisting of alkane diols and derivatives thereof, trimethylol propane and derivatives thereof, sugars, and urea derivatives.

### Claim 4 (depends on 1)

The inkjet recording liquid of claim 1, wherein the water-soluble solvent comprises at least one selected from the group consisting of an alkane diol, an alkyl ether of an alkane diol, an alkylene oxide adduct of glycerin, an alkylene oxide adduct of glucose and an alkylene oxide adduct of sorbitose.

### Claim 5 (depends on 1)

The inkjet recording liquid of claim 1, wherein the colorant comprises a pigment dispersed by a phase inversion method.

### Claim 6 (depends on 1)

The inkjet recording liquid of claim 1, further comprising polymer particles.

### Claim 7 (depends on 1)

The inkjet recording liquid of claim 1, further comprising a water-soluble polymer thickener.