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Recording ink, ink cartridge, ink record, inkjet recording apparatus and inkjet recording process

A technology for recording inks and polymers, applied in the direction of reproduction/marking methods, inks, printing, etc., can solve the problems of undisclosed or implied ordinary paper performance, poor weather resistance and water resistance, and achieve excellent color development performance and high Delivery stability, color saturation improvement effect

Active Publication Date: 2010-01-20
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dye ink has disadvantages: poor in weather resistance and water resistance
However, in these patent documents, there is no disclosure or suggestion of improvement in plain paper performance with recording ink

Method used

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  • Recording ink, ink cartridge, ink record, inkjet recording apparatus and inkjet recording process
  • Recording ink, ink cartridge, ink record, inkjet recording apparatus and inkjet recording process
  • Recording ink, ink cartridge, ink record, inkjet recording apparatus and inkjet recording process

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0232] -Preparation of Polymer Microparticle Dispersions Including Copper Phthalocyanine Pigments-

[0233] A 1 L flask equipped with a mechanical stirrer, thermometer, reflux tube, and dropping funnel was fully purged with nitrogen, and 11.2 g of styrene, 2.8 g of acrylic acid, 12.0 g of lauryl methacrylate, 4.0 g of polymethylmethacrylate were added to the flask. ethylene glycol acrylate, 4.0 g of styrene macromonomer (manufactured and sold by ToaGosei Co., Ltd.; trade name: AS-6) and 0.4 g of mercaptoethanol, followed by heating the flask at a temperature of 65°C. Next, within 25 hours, 100.8 grams of styrene, 25.2 grams of acrylic acid, 108.0 grams of lauryl methacrylate, 36.0 grams of poly(ethylene glycol methacrylate), 60.0 grams of hydroxyethyl methacrylate, 36.0 grams of styrene Molecular monomer (manufactured and sold by Toa Gosei Co., Ltd.; trade name: AS-6), 3.6 g of mercaptoethanol, 2.4 g of azobisdimethylvalelonitrile, and 18 g of methyl ethyl ketone The first mi...

preparation Embodiment 2

[0238] -Preparation of Polymer Microparticle Dispersions Including Dimethylquinacridone Pigments-

[0239] A magenta polymer microparticle dispersion was prepared substantially in the same manner as in Preparation Example 1 except that the copper phthalocyanine pigment was replaced by the pigment "Pigment Red 122".

[0240] The average particle diameter of the obtained polymer microparticles was measured using a particle size distribution measuring instrument (manufactured and sold by Nikkiso Co., Ltd.; trade name: Microtrack UPA), and the average particle diameter (D50%) was found to be 127 nm.

preparation Embodiment 3

[0242] -Preparation of Polymer Microparticle Dispersion Including Monoazo Yellow Pigment-

[0243] A yellow polymer microparticle dispersion was prepared substantially in the same manner as in Preparation Example 1 except that the copper phthalocyanine pigment was replaced by the pigment "Pigment Yellow 74".

[0244] The average particle diameter of the obtained polymer microparticles was measured using a particle size distribution measuring instrument (manufactured and sold by Nikkiso Co., Ltd.; trade name: Microtrack UPA), and found to be 76 nm in average particle diameter (D50%).

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Abstract

The object of the present invention is to provide a recording ink which is excellent in color developing properties, has a high delivery stability, can improve remarkably color saturation and can form a high-quality image, when the ink is used for printing a plain paper, further an ink cartridge, an ink record, an inkjet recording apparatus and an inkjet recording process.

Description

technical field [0001] The present invention relates to a recording ink, an ink cartridge, an ink recorded matter, an inkjet recording apparatus and an inkjet recording method provided using the recording ink. Background technique [0002] Generally, for inkjet recording devices, hydrophilic inks including water-soluble dyes are mainly used as colorants. Dye ink has disadvantages of being poor in weather resistance and water resistance. Therefore, research into pigment inks manufactured using pigments instead of water-soluble dyes has recently been conducted. However, pigment inks are still poor in color developing performance and stability compared with dye inks, and especially with the improvement of technology for high-quality images of OA printers, ordinary inks are required for pigment inks for plain paper. Paper properties such as print quality, hue, color saturation, gloss and storage stability are comparable to dye inks. [0003] As a raw material for magenta ink ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00C09D11/30C09D11/38
Inventor 南场通彦羽桥尚史小岛真理子井上智博坂内昭子后藤明彦永井希世文
Owner RICOH KK