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Alkali-soluble solid dispersant resin and preparation method thereof

A solid dispersant and alkali-soluble technology, which is applied in the field of alkali-soluble solid dispersant resin and its preparation, can solve the problems of weakening and weakening of the dispersing ability, the influence of the binding force of the dispersant and the pigment, etc., so as to improve the dispersing performance and improve the binding ability Effect

Active Publication Date: 2017-03-15
河南省中凌煜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the water-based system, under the action of the dispersant, during the dispersion process of the pigment, its non-polar group is combined with the surface of the organic pigment such as pigment carbon black, and the hydrophilic group is provided to combine with water to form a hydration layer, but In the linear structure, non-polar groups and hydrophilic groups are randomly distributed on the same main chain, and the combination of non-polar groups in the dispersant and the pigment surface is weakened by the hydrophilic groups on the same main chain, resulting in The binding force between the dispersant and the pigment is affected, and the dispersing ability is weakened

Method used

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  • Alkali-soluble solid dispersant resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of an alkali-soluble solid dispersant resin, specifically: 18.0 kg of acrylic acid, 26.0 kg of styrene, 30.5 kg of α-methylstyrene, 3.0 kg of maleic anhydride, 1.5 kg of di-tert-butyl peroxide, in Mix well at room temperature to obtain mixture A. Add 4.5 kg of lauryl alcohol polyoxyethylene ether (n=7) and 8.0 kg of diethylene glycol dimethyl ether into the reactor, heat to raise the temperature to 145-150 ° C, under the protection of nitrogen, within 2 hours The mixture A is gradually added into the reactor, after the addition is completed, the temperature is raised to 175-180°C and kept for 50-60 min to continue the polymerization reaction. Then the volatile components were evaporated under reduced pressure (pressure 17-20 kpa), discharged while hot, and cooled to room temperature to obtain 82.0 kg of alkali-soluble solid dispersant resin.

[0022] The alkali-soluble solid dispersant resin prepared by embodiment 1 is carried out infrared spectrom...

Embodiment 2

[0030] A preparation method of an alkali-soluble solid dispersant resin, specifically: 19.5 kg of acrylic acid, 26.5 kg of styrene, 29.5 kg of α-methylstyrene, 3.0 kg of maleic anhydride, 1.5 kg of tert-butyl peroxybenzoate, Mix well at room temperature to obtain mixture A. Add 3.0 kg of lauryl alcohol polyoxyethylene ether (n=7) and 8.0 kg of diethylene glycol dimethyl ether into the reactor, heat to raise the temperature to 155-160 °C, under nitrogen protection, within 1.5 hours Mixture A was gradually added to the reactor. After the feeding is complete, the temperature is raised to 170-175°C and kept for 45-50 min to carry out the polymerization reaction. After the reaction, the volatile components were evaporated under reduced pressure (pressure 17-20kpa), discharged while hot, and cooled to room temperature to obtain 82.3 kg of alkali-soluble solid dispersant resin.

[0031] Performance Testing:

[0032]1) It was determined that the acid value of the prepared alkali-so...

Embodiment 3

[0035] A preparation method of an alkali-soluble solid dispersant resin, the specific dosage of each raw material is: 21.0 kg of acrylic acid, 26.5 kg of styrene, 28.0 kg of α-methylstyrene, 3.0 kg of maleic anhydride, 0.5 kg of di-tert-butyl peroxide kg, 1.0 kg of tert-butyl peroxybenzoate, 1.5 kg of polyoxyethylene lauryl ether (n=7), and 10.0 kg of diethylene glycol dimethyl ether; refer to Example 1 for other operating conditions. Obtain 80.2 kg of alkali-soluble solid dispersant resin.

[0036] Performance Testing:

[0037] 1) It was determined that the acid value of the prepared alkali-soluble solid dispersant resin was 205 mg KOH / g, and the glass transition temperature was 49°C;

[0038] 2) Refer to the method in Example 1 to prepare a resin solution with a content of 25%. The viscosity of the resin solution was measured to be 477 mPa.s. Take 90 g of 25% resin solution, 90 g of pigment carbon black and 90 g of water, mix and grind to obtain a color paste. The finenes...

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Abstract

The invention provides a preparation method of alkali-soluble solid dispersant resin. The preparation method includes uniformly mixing acrylic acid, styrene, alpha-methyl styrene, maleic anhydride, di-tert-butyl peroxide and / or tert-butyl peroxybenzoate at room temperature to obtain mixture A, adding linear alcohol ethoxylates and solvent diethylene glycol dimethyl ether into a reactor with heating to 140-160 DEG C,adding the mixture A under nitrogen atmosphere, then heating up to 170-185 DEG C for polymerization reaction for 20-60 min, and performing reduced pressure distillation after reaction to obtain the alkali-soluble solid dispersant resin. During mass polymerization of styrene and acrylic acid, the hydrophilic-lipophilic amphiphilic component, namely linear alcohol ethoxylates is added, the terminal hydroxyl group of the linear alcohol ethoxylates reacts with maleic anhydride or acrylic acid in the system to form a hydrophilic-lipophilic side chain, the lipophilic group at the terminal of the side chain changes bonding point distribution of dispersant and pigment, bonding stability of dispersant and pigment is improved beneficially, and dispersing performance on pigment is improved.

Description

technical field [0001] The invention belongs to the technical field of dispersant resins, and in particular relates to an alkali-soluble solid dispersant resin and a preparation method thereof. Background technique [0002] Based on the needs of environmental protection, transportation safety, safe use and resource conservation, water-based inks and paints that use water as a solvent are replacing inks and oil-based paints. Water-based pigment dispersants are the key to the production of inks and water-based paints. Alkali-soluble solid acrylic resin prepared by styrene-acrylic acid copolymerization can be used as pigment dispersant for water-based ink, ink binder, macromolecular emulsifier for varnish oil resin emulsion synthesis, etc. Existing literature provides a variety of styrene-acrylic dispersants and their preparation methods. [0003] Patent US6476170 In a pipe reactor placed in an oil bath, the temperature is 180-260 ° C, using styrene, methyl styrene and acrylic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/12C08F220/06C08F212/08C08F222/08C09D11/03C09D7/12
CPCC08F212/12C09D7/65C09D11/03C08F220/06C08F212/08C08F222/08
Inventor 程森祥王利敏陈彤
Owner 河南省中凌煜新材料科技有限公司
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