Waterborne pigment dispersant

A technology of water-based pigments and dispersants, applied in the direction of pigment slurry, coating, etc., can solve the problems of insufficient adhesion of dispersants to substrates, poor pigment dispersion ability, poor storage stability, etc., to avoid tinting strength and stability Effects of drop, adhesion enhancement, strong adsorption and dispersion

Active Publication Date: 2017-01-11
苏州世名彩捷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to comprehensively solve the above-mentioned problems such as high molecular weight of styrene-maleic anhydride copolymer, poor dispersibility to pigments, low coloring power of color paste, poor storage stability, and insufficient adhesion of dispersants to substrates, etc., the present invention provides a Preparation method of graft-modified styrene-divinylbenzene-maleic anhydride-acrylic acid tetrapolymer dispersant with crosslinked structure

Method used

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  • Waterborne pigment dispersant
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 130g of 1,4-dioxane and 29.4g of maleic anhydride to a 1000mL four-neck round bottom flask equipped with a stirrer and reflux condensing device at one time, place the flask in a constant temperature oil bath, heat and stir to 100°C . Add 41.66g styrene, 0.26g divinylbenzene, 21.6g acrylic acid, 1.9g azobisisobutyronitrile, 2.5g dodecanethiol, 18g 1,4-dioxane into a 200mL constant pressure titration funnel The mixture is added dropwise in the reactor, and the dropwise addition time is 2 hours, and the reaction is continued for 2 hours after the dropwise addition ends. Add 120 g of graft modifier A and 4 g of triethylamine into the four-neck flask, maintain the temperature at 80° C., and the reaction time is 4 hours. After the reaction, the solvent 1,4-dioxane was distilled off and cooled to room temperature to obtain a graft-modified cross-linked styrene-divinylbenzene-maleic anhydride-acrylic acid copolymer. After testing, the weight average molecular weight of th...

Embodiment 2

[0049] Add 350g of 1,4-dioxane and 24.52g of maleic anhydride to a 1000mL four-neck round bottom flask equipped with a stirrer and reflux condensing device at one time, place the flask in a constant temperature oil bath, heat and stir to 90°C . Add a mixture of 62.49g styrene, 0.65g divinylbenzene, 10.8g acrylic acid, 6g benzoyl peroxide, 2.93g dodecanethiol, and 60g tetrahydrofuran into a 200mL constant pressure titration funnel, and add it dropwise to the reactor , the dropwise addition time was 4 hours, and the reaction was continued for 3 hours after the dropwise addition ended. Add 59g of graft modifier B and 4g of 4-dimethylaminopyridine into the four-neck flask, the temperature rises to 100°C, and the reaction time is 2 hours. After the reaction, the solvent tetrahydrofuran was distilled off and cooled to room temperature to obtain a graft-modified cross-linked styrene-divinylbenzene-maleic anhydride-acrylic acid copolymer. After testing, the weight average molecular ...

Embodiment 3

[0051] Add 260g of cyclohexane and 49.03g of maleic anhydride in a 1000mL four-necked round bottom flask equipped with a stirrer and reflux condensing device at one time, place the flask in a constant temperature oil bath, heat and stir to 70°C. Add 41.66g styrene, 0.92g divinylbenzene, 7.21g acrylic acid, 9.7g tert-butyl peroxybenzoate, 2.1g α-methylstyrene linear dimer, 40g cyclohexyl to a 200mL constant pressure titration funnel The mixture of alkanes, the dropwise addition time was 3 hours, and the reaction was continued for 1 hour after the dropwise addition was completed. Add 120 g of graft modifier C and 3 g of aluminum trichloride into the four-neck flask, maintain the temperature at 70° C., and the reaction time is 6 hours. After the reaction, the solvent was distilled off and cooled to room temperature to obtain a graft-modified cross-linked styrene-divinylbenzene-maleic anhydride-acrylic acid copolymer. After testing, the weight average molecular weight of the obta...

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Abstract

The invention discloses a preparation method of a pigment dispersant. The dispersant is a graft-modified styrene-divinyl benzene-maleic anhydride-acrylic copolymer with a cross-linked structure. According to the synthetic process of the dispersant, firstly, in an organic solvent such as 1,4-dioxane, through polymerization of common free radical solutions, a low-molecular-weight cross-linked styrene-divinyl benzene-maleic anhydride-acrylic copolymer is obtained; after the reaction is completed, the solvent is not removed, fatty alcohol-polyoxyethylene ether or single-ended amino polyether and a catalyst are directly added for a grafting reaction, and finally the graft-modified styrene-divinyl benzene-maleic anhydride-acrylic copolymer with the cross-linked structure is obtained. Reaction equipment and process needed by synthesis of the pigment dispersant are simple, and waterborne color paste prepared from the dispersant has high tinting strength, adhesive force and storage stability.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method and application of a graft-modified styrene-divinylbenzene-maleic anhydride-acrylic acid copolymer dispersant with a crosslinked structure. Background technique [0002] In recent years, pigments have been widely used in coatings, inks and other fields. Compared with dyes, pigments mostly exist in the form of powder or granules, and pigments are basically insoluble in water systems. Therefore, when pigments are used in the above fields, raw materials such as pigments, dispersants, and water are generally dispersed, ground, and defoamed. The water-based color paste formed by stably dispersing the pigment particles in the water-based system obtained by , filtration and other processes is used in the form of water-based pigment dispersion. [0003] Due to the small particle size of the pigment particles in the water-based color paste and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/06C08F220/06C08F212/36C09D7/12C09D17/00
CPCC08F212/08C09D17/00C08F222/06C08F220/06C08F212/36
Inventor 吕仕铭杜长森汪理想卢圣国胡冲
Owner 苏州世名彩捷科技有限公司
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