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Coated pigment, aqueous pigment dispersion, use thereof, and production method therefor

A technology of dispersion and pigment, applied in the field of pigment

Active Publication Date: 2019-11-15
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, in the salt mill, since the pigments are fine, the aggregation of the pigments is extremely strong, and it is difficult to disperse the pigments into primary particles in the subsequent step of obtaining the pigment dispersion liquid, and it is necessary to invest a large amount of energy in the dispersion step.

Method used

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  • Coated pigment, aqueous pigment dispersion, use thereof, and production method therefor
  • Coated pigment, aqueous pigment dispersion, use thereof, and production method therefor
  • Coated pigment, aqueous pigment dispersion, use thereof, and production method therefor

Examples

Experimental program
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Embodiment

[0232] Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to an Example in particular. In addition, in an Example, "part" is "mass part", and "%" is "mass %".

[0233] (melting point)

[0234] Thermoplus TG8120 (manufactured by Rigaku Corporation) was used for the measurement of the melting point. For a sample of about 5 mg, the temperature was raised at an initial temperature of 25°C at a rate of 10°C / min, and the temperature was increased to 500°C. The obtained endothermic peak was read to obtain the melting point.

[0235] (acid value)

[0236] About 1 g of the sample was accurately weighed in the Erlenmeyer flask, and 50 ml of distilled water / dioxane (weight ratio: distilled water / dioxane=1 / 9) mixed liquid was added and dissolved. For the sample solution, using a potential difference measuring device (manufactured by Kyoto Electronics Industry Co., Ltd., device name "potential difference automatic titr...

Embodiment A1-1

[0369] The coating pigment (PA1-1), ion-exchanged water, and the basis for neutralization are weighed so that the pigment contained in the coating pigment in 100 parts of the pigment aqueous dispersion (DPA1-1) becomes 15 parts. The equivalent amount of dimethylaminoethanol calculated from the acid value and mass parts of the resin contained in the coating pigment is stirred with a high-speed mixer for 1 hour at a liquid temperature of 70 ° C, and the volatilized dimethylaminoethanol is adjusted by ion-exchanged water water, to obtain 100 parts of an aqueous pigment dispersion (DPA1-1). The particle size distribution of the obtained pigment aqueous dispersion was evaluated as the particle size distribution of the coating pigment (PA1-1). The particle size distribution was measured by dilution with ion-exchanged water using Nanotrac Wave (manufactured by Microtrac·BEL). The particle size distribution of the pigment dispersion (DPA1-1) was d1 = 25 nm, d50 = 53 nm, and d99 = 160...

Embodiment A1-2～ Embodiment A1-44、 comparative example A1-1～ comparative example A1-4

[0386] [Example A1-2 to Example A1-44, Comparative Example A1-1 to Comparative Example A1-4, Comparative Example A1-6]

[0387] Except changing coating pigment and alkaline substance into the composition shown in Table 7, obtain pigment aqueous dispersion (DPA1-2)~(DPA1-48) and ( DPA1-50). About the obtained pigment dispersion, the particle size distribution was measured similarly to Example (A1-1). The results of the particle size distribution are reported in Table 7.

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Abstract

A purpose of the present invention is to provide a fine coated pigment which is inhibited from becoming coarse particles and is easily dispersible. The coated pigment is a pigment, the surface of which has been coated with a resin, wherein the resin is an alpha-olefin copolymer having an acid group and the amount of the resin with which the pigment has been coated is 10-50 parts by mass per 100 parts by mass of the uncoated pigment (X).

Description

technical field [0001] The present invention relates to a resin-coated pigment. Background technique [0002] Pigment compositions using organic pigments are used in various applications in the field of coatings for automobiles and building materials, and in the field of printing inks, regardless of whether they are indoors or outdoors. Among them, in the field of coatings, ink jet recording, color resist for color filters, toner, and stationery, etc., which require high performance , Compared with other applications, fine pigments with fewer coarse particles are required. [0003] As a method of obtaining a fine organic pigment, salt milling (salt milling) is mentioned, for example. Salt milling is a process of mechanically kneading pigments, water-insoluble synthetic resins, water-soluble inorganic salts such as table salt, and water-soluble organic solvents using a kneader, and then washing the water-soluble inorganic salts with water-soluble organic solvents. remove. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/10B41J2/01C09B67/08C09B67/20C09B67/46C09C1/00C09D11/037C09D11/322C09D17/00C09B1/22C09B5/62C09B19/02C09B25/00C09B29/20C09B29/33C09B33/153C09B35/033C09B35/10C09B45/22C09B47/04C09B47/10C09B47/20C09B48/00C09B57/00C09B57/04G02B5/20
CPCC09D17/001C09D5/028C09D7/41C08K9/08C09D11/037C09D11/326C09D11/106C09D11/107G03G9/0926G03G9/092C09D17/003C09D11/322C08F210/14C08F222/06
Inventor 鹤谷进典
Owner TOYO INK SC HOLD CO LTD
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