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Dispersing agent, method for producing same, and pigment dispersion and ink containing such dispersing agent

A technology of dispersants and pigments, applied in inks, pigment pastes, chemical instruments and methods, etc., can solve the problems of high viscosity, poor ability, poor micro-dispersion of pigments, etc.

Active Publication Date: 2008-07-09
TOYO INK SC HOLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a dispersant having a phosphoric acid group or a sulfonic acid group lacks spreading properties for applied inks, coatings, etc. On the other hand, conventional dispersants using carboxylic acids and synergists with basic groups Combination, there is no problem in heat resistance, chemical resistance, compatibility, but high viscosity, poor stability, poor pigment microdispersion, etc., poor ability as a dispersant
[0007] In particular, for color filter inks, photosensitive black inks for black matrices, and inkjet inks, which use very fine pigments in high concentrations, not only pigment dispersibility but also coating properties, discharge properties, and dry resolubility are required. and adhesion to substrates, etc., it is difficult for conventional dispersants to meet all of the above requirements

Method used

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  • Dispersing agent, method for producing same, and pigment dispersion and ink containing such dispersing agent
  • Dispersing agent, method for producing same, and pigment dispersion and ink containing such dispersing agent
  • Dispersing agent, method for producing same, and pigment dispersion and ink containing such dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0164] The polymerization of the alkylene oxide can be carried out according to a known method, for example, in the presence of a basic catalyst at a temperature of 100 to 200°C under a pressurized state. As a polymer (PeOH) obtained by polymerizing an alkylene oxide to the hydroxyl group of a monohydric alcohol, it is commercially available. For example, the UNIEX series manufactured by Nippon Oil & Fat Co., Ltd., and the Nippon Oil & Fat Co., Ltd.'s ブレンマ series. As polymer (PeOH). Specific examples of commercially available products include UNIEX M-400, M-550, M-2000, Beneman PE-90, PE-200, PE-350, AE-90, AE-200, AE-400, PP-1000, PP-500, PP-800, AP-150, AP-400, AP-550, AP-800, 50PEP-300, 70PEP-350B, AEP series, 55PET-400, 30PET-800, 55PET-800, AET series, 30PPT-800, 50PPT-800, 70PPT-800, APT series, 10PPB-500B, 10APB-500B, etc. Using these commercially available products can omit the first step.

[0165] Here, the alkylene group of the alkylene oxide constitutes the repeating un...

Embodiment 1

[0468] 62.6 parts of 1-dodecanol, 287.4 parts of ε-caprolactone, and 0.1 part of monobutyltin oxide (IV) as a catalyst are charged into a reaction vessel with a gas introduction tube, thermometer, condenser and stirrer; After nitrogen substitution, heating was carried out at 120°C for 4 hours and stirring. When 98% of the reaction was confirmed by solid content measurement, the first step ("manufacturing step 1" described in the following tables) was terminated. The number average molecular weight of this reaction product was 1,350 and the weight average molecular weight was 1,890.

[0469] 36.6 parts of pyromellitic dianhydride was added to the above reaction product, and the reaction was carried out at 100°C for 5 hours. By measuring the acid value to confirm that 97% or more of the acid anhydride is partially esterified, the second step is completed ("manufacturing step 2" described in the following tables). The obtained dispersant is a waxy solid at 25°C, with average number T...

Embodiment 2～15

[0472] The same equipment, catalyst, and reaction operation as in Example 1 were used, and the compounds shown in Table 1 and Table 2 were used as starting materials in the amounts shown in Table 1 and Table 2 to obtain each dispersant. Among them, in Examples 4, 5, 9, 12, 13, and 15, the inside of the reaction vessel was replaced with dry air instead of nitrogen. In addition, the ""水" described in Example 7 and Example 13 is added after the acid value of the tetracarboxylic dianhydride and the hydroxyl group of the polyester having a hydroxyl group at one end has been confirmed, and is used for hydrolysis. Residual anhydride in water.

[0473] [Table 1]

[0474] Example

1

Example

2

Example

3

Example

4

Example

5

Example

6

Example

7

Example

8

The origin of manufacturing step 1

Material composition ratio (parts)

Monoalcohol

1-dodecanol

62.6

6...

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Abstract

Disclosed is a dispersing agent represented by the following general formula (1). Regarding A<1>-A<4>, two of them respectively represent a monovalent polymer moiety (P) and the other two respectively represent -C(=O)OH or -CH2C(=O)OH; one of them represents a monovalent polymer moiety (P) and the other three respectively represent -C(=O)OH or -CH2C(=O)OH; or one of them represents a monovalent polymer moiety (P), two of the other three respectively represent -C(=O)OH or -CH2C(=O)OH and the other one represents -C(=O)-X-R. X<1> represents a tetravalent group represented by the following general formula (2), (3) or (4).

Description

Technical field [0001] The present invention relates to a dispersant capable of preparing a dispersion excellent in dispersibility, fluidity and storage stability, a preparation method thereof, a pigment dispersion containing the dispersant, and various inks containing the dispersant. Examples of inks using the dispersant include inks for color filters, photosensitive black inks, inkjet inks, and inkjet inks for color filters. Background technique [0002] It is generally known that it is difficult to stably disperse a pigment at a high concentration in the production of inks and the like, which causes various problems in the production process or the product itself. For example, dispersions containing pigments containing fine particles often exhibit high viscosity, which not only makes it difficult to remove and transport the product from the disperser, but also gelatinizes even during storage when the dispersibility is poor, making it difficult to use. Furthermore, poor state s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C09D17/00C09K23/52
CPCB01F17/0028C09D17/00C09D7/02B01F17/005B01F17/0057C09D11/326C09D7/45C09K23/00C09K23/16G02B5/20
Inventor 有吉泰三上让司立花友子高畠美子广岛努长曾我部浩小仓真由美池上智纪吉泽俊启
Owner TOYO INK SC HOLD CO LTD
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