Pigment composition and color filter

A pigment composition and pigment technology, applied in the direction of pigment slurry, instruments, filters, etc., can solve the problems of low dispersibility and low stability over time, and achieve the effect of excellent brightness

Active Publication Date: 2017-02-15
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the hindered amine skeleton-derived resin is used alone, the result is low dispersibility and low stability over time

Method used

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  • Pigment composition and color filter
  • Pigment composition and color filter
  • Pigment composition and color filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0386]Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited especially to an Example. In addition, in the Examples, "part" means "part by mass". In addition, Mn and Mw are number average molecular weight and weight average molecular weight, respectively.

[0387] (Average molecular weight of resin type dispersant (A) having aromatic carboxyl group)

[0388] The number-average molecular weight (Mn) and weight-average molecular weight (Mw) of the acrylic resin used as the resin of the pigment carrier were obtained by GPC (Tosoh Corporation) equipped with an RI detector using a TSKgel column (manufactured by Tosoh Corporation). manufactured, HLC-8120GPC), using THF as a developing solvent, the polystyrene-equivalent number average molecular weight (Mn) and weight average molecular weight (Mw) measured.

[0389] (Acid value of resin type dispersant (A) having an aromatic carboxyl group)

[0390] The acid value of ...

manufacture example 1

[0396] (Production Example 1 (A-1) of Resin-type Dispersant (A) Having Aromatic Carboxyl Group)

[0397] 62.6 parts of 1-dodecyl alcohol, 287.4 parts of ε-caprolactone, and 0.1 parts of monobutyl tin oxide (IV) as a catalyst were put into a reaction tank equipped with a gas inlet pipe, a condenser pipe, a stirring blade and a thermometer. After substituting with nitrogen, the mixture was heated and stirred at 120° C. for 4 hours. After confirming that 98% had reacted by solid content measurement, 36.6 parts of pyromellitic dianhydrides were added there, and it was made to react at 120 degreeC for 2 hours. By measuring the acid value, it was confirmed that 98% or more of the acid anhydride was half-esterified, and the reaction was completed to obtain a dispersant. Thus, a resin type dispersant (A-1) having an aromatic carboxyl group having an acid value per unit solid content of 49 mgKOH / g and a number average molecular weight (Mn) of 2,500 was obtained. Then, propylene glyco...

manufacture example 2

[0398] (Production Example 2 (A-2) of Resin-type Dispersant (A) Having Aromatic Carboxyl Group)

[0399] Put 60 parts of methoxypropyl acetate into a reaction tank equipped with a gas inlet tube, a condenser tube, a stirring blade and a thermometer, and raise the temperature to 110°C. 40 parts of methyl methacrylate, 28 parts of benzyl methacrylate, 20 parts of n-butyl acrylate, 12 parts of 2-hydroxyethyl methacrylate, 40 parts of methoxypropyl acetate and 6 parts of dimethyl-2,2'-azobis-diisobutyrate were homogeneously mixed in advance, and the mixture was stirred at the same temperature for 3 hours to complete the reaction. Thus, an intermediate having a number average molecular weight of 3,800 and an average number of hydroxyl groups in one molecule of 3.5 was obtained. 100 parts of the intermediate, 5.1 parts of trimellitic anhydride, and 0.1 part of dimethylbenzylamine were thrown in as a solid content, and it was made to react at 100 degreeC for 6 hours. Thus, a resin ...

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Abstract

The present invention relates to a pigment composition characterized by containing a pigment, a resin-type dispersant (A) having aromatic carboxyl groups, and a vinyl-based resin-type dispersant (B) having a piperidyl skeleton. The present invention provides a pigment composition that realizes excellent properties in terms of dispersibility, fluidity, storage stability, close adhesiveness, and brightness, not only when used for paints, offset inks, gravure inks, and the like that have a relatively large pigment particle diameter, but also when used with ink jet inks, color filter inks, and the like that have a finer pigment particle diameter.

Description

technical field [0001] The present invention relates to a pigment composition excellent in dispersibility, fluidity, storage stability and brightness. Background technique [0002] In general, when producing a pigment composition, it is known that it is difficult to stably disperse a pigment at a high concentration, which causes various problems in the production process and the product itself. [0003] For example, a pigment composition containing a pigment composed of fine particles often exhibits high viscosity, which not only makes it difficult to take out and transport the product from the disperser, but also causes gelation during storage in severe cases, making it difficult to use. Furthermore, regarding the surface of the color vehicle of the pigment composition, state defects such as a reduction in gloss and poor leveling may occur. In addition, when different kinds of pigments are mixed and used, there may be color unevenness in the developed product due to color ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D17/00C09B67/20C09B67/46G02B5/20
CPCC09B67/009C09D11/037C09D11/10C09D17/00G02B5/223
Inventor 小久保奈津子早川纯平铃木雄太相京澄洋久保田考俊
Owner TOYO INK SC HOLD CO LTD
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