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Oil-based ink composition for ink-jet recording

An inkjet recording and composition technology, applied in the directions of inks, applications, household appliances, etc., can solve problems such as nozzle blockage, inability to eject, and reduced ejectability.

Inactive Publication Date: 2008-07-23
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a resin dissolved in a solvent, the larger the molecular weight, the better the fixability and strength when dry, but the viscosity of the ink composition will increase significantly.
Therefore, the ejection performance is reduced, or in extreme cases, the nozzle is clogged, and ejection cannot be performed
In addition, although the low molecular weight can suppress the increase in viscosity, the fixation and strength will decrease
Moreover, if the amount of resin existing in the solvent in a dissolved state is excessive, ejection defects such as flight bending and splashing will occur regardless of the molecular weight.

Method used

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  • Oil-based ink composition for ink-jet recording

Examples

Experimental program
Comparison scheme
Effect test

Embodiment (1-1

[0114] [Example (1-1): Black ink composition 1]

[0115] C.I. Pigment Black 7 5% by weight

[0116] Dispersant (fululine DOPA-33) 3% by weight

[0117] Diethylene glycol diethyl ether 52.1% by weight

[0118] Dipropylene glycol monomethyl ether 34.7% by weight

[0119] Surfactant (BYK-UV3570: manufactured by BYK Kimi Japan Co., Ltd.)

[0120] 0.2% by weight

[0121] Polyacrylic polyol-based binder resin (N-2043-AF-1: manufactured by Helima Chemicals Co., Ltd.) 5% by weight

Embodiment (1-2

[0122] [Example (1-2): Black ink composition 2]

[0123] C.I. Pigment Black 7 5% by weight

[0124] Dispersant (fululine DOPA-33) 3% by weight

[0125] Diethylene glycol diethyl ether 50.6% by weight

[0126] Dipropylene glycol monomethyl ether 33.7% by weight

[0127] Surfactant (BYK-UV3570: manufactured by BYK Kimi Japan Co., Ltd.)

[0128] 0.2% by weight

[0129] Polyurethane-based adhesive resin (Sampolin IB-F370: manufactured by Sanyo Chemical Industry Co., Ltd.)

[0130] 7.5% by weight

Embodiment (1-3

[0131] [Example (1-3): Black ink composition 3]

[0132] C.I. Pigment Black 7 5% by weight

[0133] Dispersant (fululine DOPA-33) 3% by weight

[0134] Diethylene glycol diethyl ether 49.1% by weight

[0135] Dipropylene glycol monomethyl ether 32.7% by weight

[0136] Surfactant (BYK-UV3570: manufactured by BYK Kimi Japan Co., Ltd.)

[0137] 0.2% by weight

[0138] Polyurethane-based adhesive resin (Sampolin IB-501: manufactured by Sanyo Chemical Industry Co., Ltd.)

[0139] 10% by weight

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Abstract

The present invention provides an oil-based ink composition. The composition can restrain viscosity rise, has excellent ejection property and fixation property for recording medium, and can obtain print with fine image quality. The oil-based ink composition comprises at least a coloring material, an organic solvent and a non-aqueous resin emulsion. As organic solvent, alkylidene diol is preferential applied. In addition, as resin composing non-water base resin emulsion, polyacrylic acid polyol is preferential applied.

Description

technical field [0001] The present invention relates to an oil-based ink composition for inkjet recording, and particularly relates to an oil-based ink composition containing fine polymer resin particles and having excellent image quality and fixability. Background technique [0002] As the inkjet recording method, there are known methods of ejecting ink by electrostatic attraction (electric field control method), and methods of ejecting ink by driving pressure of a piezoelectric element (drop-on-on-demand). (demand) method or pressure pulse method), and the method of forming bubbles by high heat and ejecting ink using the pressure generated by the growth (bubble or thermal jet method and other inkjet recording methods, These methods can obtain extremely high-precision images. In addition, in these inkjet recording methods, water-based inks using water as the main solvent and oil-based inks using organic solvents as the main solvent are generally used. [0003] Printed imag...

Claims

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Application Information

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IPC IPC(8): C09D11/10B41J2/01C09D11/30
Inventor 小柳崇中野景多郎竹本清彦
Owner SEIKO EPSON CORP
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