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A kind of preparation method of water-based pigment dispersion and water-based ink

A technology of water-based pigments and dispersions, which is applied to inks, pigment pastes, household appliances, etc., and can solve the inevitable problems of shortening the storage time of pigment dispersions, etc.

Active Publication Date: 2022-04-12
厦门市圣格包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the applicant claims that the initiator in the oil phase initiates the alkali-soluble monomers of the water phase to avoid generating polymers in the water phase and destroying the stability of the dispersion, the alkali-soluble monomers in the water phase are still combined with free radicals. There is a certain probability that it will still enter the water phase and cause the polymerization of the alkali-soluble monomer in the water phase. Therefore, it is found that the homopolymer of the alkali-soluble monomer will inevitably be generated in the water phase, resulting in shortened storage time of the pigment dispersion.

Method used

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  • A kind of preparation method of water-based pigment dispersion and water-based ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 4 parts of OP-10 and 1 part of emulsifier composed of sodium dodecylbenzenesulfonate, 2 parts of n-butanol, 50 parts of pigment carbon black, 5 parts of methacrylic acid, 15 parts of structural formula CH 2 =C(CH 3 )COO(CH 2 CH 2 O) 5.5 (CH 2 CHCH 3 O) 1.2 CH 3 Polyether monoacrylate, 50 parts of methyl methacrylate, 100 parts of butyl acrylate, and 10 parts of azobisisobutyronitrile were mixed, stirred at high speed to disperse evenly, and obtained an oil phase;

[0030] The above oil phase was gradually added to 320 parts of water stirred at high speed to obtain a transparent to translucent microemulsion; the temperature of the microemulsion was raised to 80 ° C for 10 hours under low speed stirring, and the temperature was lowered to below 50 ° C, and 0.05 parts of water-soluble aziridine was added Cross-linking agent, stirred for 4 hours, added ammonia water to adjust the pH to 7.5, and filtered through an 80-mesh filter to obtain a water-based pigment disper...

Embodiment 2

[0032] 4 parts of OP-10 and 1 part of emulsifier composed of sodium dodecylbenzenesulfonate, 1 part of ethylene glycol, 70 parts of iron oxide red, 5 parts of acrylic acid, 5 parts of hydroxypropyl methacrylate, 5 parts of structural formula CH 2 =C(CH 3 )COO(CH 2 CH 2 O) 6.7 CH 3 The polyether monoacrylate, 100 parts of styrene, and 5 parts of azobisisoheptanonitrile were mixed and stirred at high speed to disperse evenly to obtain an oil phase;

[0033]The above oil phase was gradually added to 350 parts of water stirred at high speed to obtain a transparent to translucent microemulsion; the microemulsion was heated to 60 ° C for 8 hours under low speed stirring, and the temperature was lowered to below 50 ° C, and 0.1 part of water-soluble carboimide was added cross-linking agent, stirred for 2 hours, added ammonia water to adjust the pH to 8.0, and filtered through an 80-mesh filter to obtain a water-based pigment dispersion, denoted as D-2.

Embodiment 3

[0035] Emulsifier consisting of 3.8 parts OP-10 and 1.2 parts sodium dodecylbenzenesulfonate, 0.5 parts propylene glycol, 50 parts ultramarine blue, 1 part acrylic acid, 4.5 parts hydroxypropyl methacrylate, 10 parts styrene, 40 parts Mix butyl acrylate and 2 parts of azobisisobutyronitrile, stir at high speed and disperse evenly to obtain an oil phase;

[0036] The above oil phase was gradually added to 120 parts of water stirred at high speed to obtain a transparent to translucent microemulsion; the microemulsion was heated to 80°C under low speed stirring for 8 hours, and the temperature was lowered to below 50°C, and 0.015 parts of water-soluble aziridine was added Cross-linking agent, stirred for 3 hours, added ammonia water to adjust the pH to 6.5, and filtered through an 80-mesh filter to obtain a water-based pigment dispersion, which was recorded as D-3.

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Abstract

The invention belongs to the technical field of water-based inks, in particular to a method for preparing water-based pigment dispersions and water-based inks, in which monofunctional hydrophilic monomers and hydrophobic monomers, emulsifiers, co-emulsifiers, pigments, and oil-soluble initiators are mixed After the oil phase is formed, it is gradually added to high-speed stirring water, and the obtained microemulsion is polymerized after heating up, and then a water-soluble cross-linking agent is added to obtain a water-based pigment dispersion coated with a cross-linked polymer on the surface of the pigment. The preparation method of the water-based pigment dispersion of the invention is suitable for inorganic pigments and organic pigments, and the obtained water-based pigment dispersion has the characteristics of small particle size and good storage stability.

Description

technical field [0001] The invention belongs to the technical field of water-based ink, and relates to a preparation method of water-based pigment dispersion and water-based ink. Background technique [0002] Inks are widely used in all walks of life. With the gradual enhancement of environmental protection awareness, water-based inks are getting more and more attention and are being used more and more widely. Among them, water-based pigment dispersions have an important impact on the performance of water-based inks. The performance of water-based pigment dispersion is mainly reflected in two aspects: dispersion particle size and storage stability. Various methods have been used to improve the storage stability of aqueous pigment dispersions and reduce the particle size of the dispersions. One of them is the method of coating pigment particles with cross-linking compounds. CN102675514B adopts the method of cross-linking and coating pigment particles in the oil phase of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/28C08F220/06C08F212/08C08F220/20C08F2/26C08F2/30C08F2/44C08K3/04C08K3/22C09D17/00C09D11/037
CPCC08F220/18C08F212/08C08F2/26C08F2/30C08F2/44C08K3/04C08K3/22C09D17/005C09D17/007C09D17/001C09D11/037C08K2003/2272
Inventor 吴永章
Owner 厦门市圣格包装制品有限公司
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