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Grafted dispersant and preparation method and application thereof

A technology of dispersant and branch type, applied in the field of graft type dispersant and its preparation, can solve the problems of high cost of raw materials and technology, broken ink, unusable, etc., and achieves excellent dispersion effect, simple preparation method and good stability Effect

Active Publication Date: 2020-05-08
TRENDVISION TECH(ZHUHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the fact that inkjet inks are limited by the choice of print heads, and low-viscosity and high-stability inks must be used, traditional cheap high-viscosity UV inks cannot be used. Another important reason is that the raw materials and technical costs of UV inkjet inks are too high. High, resulting in a high price of the ink, so it cannot compete with traditional solvent-based inkjet inks
UV inkjet inks often have defects such as nozzle clogging, ink droplet spraying or ink breakage due to stability and viscosity problems.
In order to overcome these defects, special specification monomers, resins and dispersants with low viscosity and high dispersion stability are often used; or complex production processes and equipment are used, which is an important reason for the high cost of raw materials and technologies

Method used

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  • Grafted dispersant and preparation method and application thereof
  • Grafted dispersant and preparation method and application thereof
  • Grafted dispersant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of graft type dispersant SA1, its preparation method specifically comprises the following steps: in the reaction bottle that has condensing reflux device, pass into protective gas nitrogen, and add solvent 334g butanone and 160g isopropanol, heat to 70-80 ℃; then the main chain monomer 150g 2-phenoxyethyl acrylate, 20g acrylamide, and branched macromonomer 280g polyethylene glycol monomethyl ether methacrylate (polymerization degree n=50) were mixed Obtain premix A; then mix and stir 48g of butanone as a solvent and 8g of azobisisobutyronitrile until dissolved to obtain premix B; then slowly add premix A and premix B into the reaction flask for reaction; react After 6 hours, it was detected that the amount of residual monomer was less than 5%, and the reaction was terminated to obtain 45% effective portion of grafted dispersant. Dispersant SA1 has a weight average molecular weight of about 22300 and includes the following structural units:

[0039]

Embodiment 2

[0041] A kind of graft type dispersant SA2, its preparation method specifically comprises the following steps: in the reaction bottle that has condensing reflux device, pass into protective gas nitrogen, and add solvent 341g ethyl acetate and 160g Virahol, be heated to 70- 80°C; then the main chain monomer 230g 2-phenoxyethyl acrylate, 30g methacrylic acid and 10g acrylamide, and the branched chain macromonomer 180g polyethylene glycol monomethyl ether methacrylate (polymerization degree n=30) to obtain premix A; then mix and stir 42 g of ethyl acetate as solvent and 7 g of azobisisobutyronitrile until dissolved to obtain premix B; then slowly add premix A and premix B simultaneously The reaction was carried out in the reaction bottle; after 7 hours of reaction, the amount of residual monomer was detected to be less than 5%, and the reaction was terminated to obtain 45% effective portion of grafted dispersant SA2. Dispersant SA2 has a weight average molecular weight of about 4...

Embodiment 3

[0044] A kind of UV ink-jet red color paste, its preparation method specifically comprises the following steps: get the SA1 graft type dispersant 200g that makes in the embodiment 1 and mix with monomer 650g 2-phenoxyethyl acrylate, stir until complete After dissolving, add 150g of pigment PR122 to mix, and stir to make the pigment completely wet to obtain a pre-dispersion; put the pre-dispersion into a sand mill and grind until the average particle size is 100-200nm; filter to remove colloids and large-size particles to obtain a dispersion Stable UV inkjet red colorant.

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Abstract

The invention belongs to the field of coatings, and discloses a grafted dispersant, which is mainly prepared from a main chain monomer, a branched chain monomer, an initiator and a solvent, and the mass ratio of the main chain monomer to the branched chain monomer is (1-2): (1-15), the main chain monomer comprises a monomer containing an aromatic group and a monomer containing an acid-base group,and the branched chain monomer is at least one selected from polyethylene glycol monomethyl ether methacrylate, polyethylene glycol methacrylate, polypropylene glycol monomethyl ether methacrylate andpolypropylene glycol methacrylate. The grafted dispersant is low in production cost and excellent in dispersing performances, and can be used for preparing UV ink color paste with good stability.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a graft type dispersant and its preparation method and application. Background technique [0002] The characteristic of UV ink is solvent free, 100% ink transfer. The UV ink is printed on the media, and it can be formed after UV light curing, so UV ink is also called environmental protection ink. It has the ability to adhere to non-porous substrates, has good water resistance, chemical resistance, light resistance and weather resistance, and is regarded as an all-round ink. [0003] UV light-curable ink has occupied a large market share in traditional ink technology, but it only occupies a small part in the inkjet printing market. In addition to the fact that inkjet inks are limited by the choice of print heads, and low-viscosity and high-stability inks must be used, traditional cheap high-viscosity UV inks cannot be used. Another important reason is that the raw materials and technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/30C08F220/06C09D11/101C09D11/322
CPCC08F283/065C09D11/101C09D11/322C08F220/56C08F220/06
Inventor 刘明辉梁文龙杨飞虎
Owner TRENDVISION TECH(ZHUHAI) CO LTD
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