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Water-based dispersant and preparation method and application thereof

A water-based dispersant and solvent technology, applied in the field of materials, can solve the problems of poor dispersion and instability, and achieve the effect of not easy to settle, strong force, not easy to fall off and be replaced

Active Publication Date: 2020-05-19
TRENDVISION TECH(ZHUHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of dispersants on the market, but there are still problems of poor dispersion and instability

Method used

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  • Water-based dispersant and preparation method and application thereof
  • Water-based dispersant and preparation method and application thereof
  • Water-based dispersant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Mix 200g benzyl methacrylate, 140g methyl ethyl ketone and 30g isopropanol uniformly to obtain premix A; mix 25g potassium methacrylate with 200g water and 25g isopropanol uniformly to obtain premix B; take 30.5g Butanone and 7 g of azobiscyanovaleric acid were mixed and stirred until dissolved to obtain premix C; then 20 g of butanone and 4.3 g of azobiscyanovaleric acid were mixed and stirred until dissolved to obtain premix D.

[0043] Put nitrogen into the reaction flask equipped with a condensing reflux device, add 300g of water and 18.2g of isopropanol, heat to 90-100°C and reflux for half an hour to remove air; then premix A, B and premix C, and simultaneously Slowly add to the reaction bottle for reaction; the reaction temperature is 90°C, after about 5.5 hours of reaction, add the premixed solution D into the reaction bottle, and react for about 1 hour, and stop the reaction after detecting that the amount of residual monomer is less than 5%; put the reaction bo...

Embodiment 2

[0045] To prepare a premix, mix 175g benzyl methacrylate, 140g methyl ethyl ketone and 30g isopropanol to obtain premix A; mix 50g potassium methacrylate with 200g water and 25g isopropanol to obtain premix B Take 30.5g butanone and 7g azobiscyanovaleric acid and mix and stir until dissolved to obtain premix C; then take 20g butanone and 4.3g azobiscyanovaleric acid and mix and stir until dissolved to obtain premix D.

[0046] Infuse nitrogen into the reaction flask equipped with a condensing reflux device, add 300g of water and 18.2g of isopropanol, heat to 90-100°C and reflux for half an hour to remove air; then premix A, B and premix C, and simultaneously Slowly add to the reaction bottle for reaction; the reaction temperature is 60°C, after about 5.5 hours of reaction, add the premix D into the reaction bottle, and react for about 1 hour, and stop the reaction after detecting that the amount of residual monomer is less than 5%, and obtain an aqueous Dispersant B.

Embodiment 3

[0048] To prepare a premix, mix 182.3g benzyl methacrylate, 140g butanone and 30g isopropanol uniformly to obtain a premix A; mix 42.7g potassium methacrylate with 200g water and 25g isopropanol to obtain a premix Mixture B; take 30.5g butanone and 7g of azobiscyanovaleric acid and mix and stir until dissolved to obtain premix C; then take 20g of butanone and 4.3g of azobiscyanovaleric acid and mix and stir until dissolved to obtain a premix d.

[0049] Infuse nitrogen into the reaction flask equipped with a condensing reflux device, add 300g of water and 18.2g of isopropanol, heat to 90-100°C and reflux for half an hour to remove air; then premix A, B and premix C, and simultaneously Slowly add to the reaction bottle for reaction; the reaction temperature is 100°C, after about 5.5 hours of reaction, add the premix D into the reaction bottle, and react for about 1 hour, and stop the reaction after detecting that the amount of residual monomer is less than 5%; put the reaction bo...

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Abstract

The invention belongs to the technical field of materials, and discloses a water-based dispersant which is mainly prepared from the following raw materials in parts by weight: 10-30 parts of benzyl methacrylate, 0.5-15 parts of methacrylate, 0.1-5 parts of an initiator and 50-90 parts of a solvent. According to the invention, the benzyl methacrylate and the methacrylate are adopted as monomers toprepare the dispersant under the action of the initiator, and the chemical structure of an aromatic ring of benzyl methacrylate is utilized to generate pi bond adsorption force, so the dispersant canbe stably adsorbed on the surfaces of pigment particles; the methacrylate has hydrophilicity and can be dissociated into ions in water, so water solubility can be greatly improved, and the prepared water-based dispersant has strong acting force with organic pigments, is not easy to fall off and replace and has good water solubility. Therefore, the water-based dispersant is good in wettability anddispersity and high in stability. Color paste prepared from the water-based dispersant is not prone to sedimentation, flooding and unstable dispersion.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a water-based dispersant, a preparation method and an application. Background technique [0002] Based on environmental protection considerations, water-based organic color pastes are more widely used in coatings, inks, and inkjet industries. Using water as the base can reduce the use of organic solvents, help to reduce VOC (volatile organic compound) emissions to prevent air pollution, and reduce the impact on human health. However, there are always some difficulties in the preparation of water-based organic color paste, for example, the color paste is unstable and prone to flocculation and delamination. The flocculation and delamination of color paste are because organic pigments are not easy to disperse stably in water. Common organic pigments include pigments and disperse dyes, and their structures are mostly azos, phthalocyanines, anthraquinones, indigos, quinacridones...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/06C09D17/00B01F17/52C09K23/52
CPCC08F220/18C09D17/005C09D17/003C09D17/001C09K23/00
Inventor 王莹铮
Owner TRENDVISION TECH(ZHUHAI) CO LTD
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