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A kind of modified polyacrylate emulsion and preparation method thereof

A technology of polyacrylate emulsion and furfuryl acrylate, applied in the direction of coating, etc., can solve the problem of reducing the storage stability of polyacrylate emulsion system, and achieve the effect of improving water resistance

Inactive Publication Date: 2021-06-22
广州科为科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal crosslinking method is a one-component system. Since the polyacrylate molecular chain contains reactive functional groups, the paint film will be chemically crosslinked after heat treatment, but the storage stability of the polyacrylate emulsion system will be reduced.
The external cross-linking method is a two-component system. Compared with the internal cross-linking method, the prepared emulsion has better performance, and the performance of the paint film can be adjusted according to different types of cross-linking agents and dosages. The disadvantage is that the operation of the two-component emulsion paint Not as convenient as one-component typing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The modified polyacrylate emulsion of the present embodiment is prepared through the following preparation steps:

[0016] (1) In terms of mass percentage, in a reaction kettle with a quartz glass top, add 57% tetrahydrofurfuryl acrylate and 3% 2-hydroxy-2-methyl phenylacetone, at a speed of 300 rpm Under this condition, use an ultraviolet lamp to illuminate through the quartz glass from the outside of the reactor, and the illumination intensity is 1000 mJ / cm2. After the photopolymerization reaction at room temperature for 30 minutes, stop the illumination; then, at a speed of 1500 rpm, the Add dropwise a mixed solution of 1% sodium dodecylbenzene sulfonate and 39% deionized water, and the time for adding is 30 minutes. After the addition is completed, react at room temperature for 1 hour at a speed of 2000 rpm to obtain Tetrahydrofurfuryl acrylate polymer emulsion, spare;

[0017] (2) According to the mass percentage, in another reactor, add 30% deionized water, 0.5% ...

Embodiment 2

[0022] (1) In terms of mass percentage, in a reaction kettle with a quartz glass top, add 59% tetrahydrofurfuryl acrylate and 1% 2-hydroxy-2-methyl phenylacetone, at a speed of 300 rpm Under this condition, use an ultraviolet lamp to illuminate through the quartz glass from the outside of the reactor, and the intensity of the illumination is 300 mJ / cm2. After the photopolymerization reaction at room temperature for 30 minutes, the illumination is stopped; then, at a speed of 1500 rpm, the Add dropwise a mixed solution of 1% sodium dodecylbenzene sulfonate and 39% deionized water, and the time for adding is 30 minutes. After the addition is completed, react at room temperature for 1 hour at a speed of 2000 rpm to obtain Tetrahydrofurfuryl acrylate polymer emulsion, spare;

[0023] (2) According to the mass percentage, in another reactor, add 30% deionized water, 0.5% sodium bicarbonate and 6% sodium dodecylbenzenesulfonate, stir well; then, at 200 rpm At 78°C, add a mixed solu...

Embodiment 3

[0028] (1) In terms of mass percentage, add 59.9% tetrahydrofurfuryl acrylate and 0.1% 2-hydroxy-2-methyl phenylacetone to a reaction kettle with a quartz glass top, at a speed of 300 rpm Under this condition, use an ultraviolet lamp to illuminate through the quartz glass from the outside of the reactor, and the illumination intensity is 50 mJ / cm2. After 30 minutes of photopolymerization at room temperature, the illumination is stopped; then, at a speed of 1500 rpm, the Add dropwise a mixed solution of 1% sodium dodecylbenzene sulfonate and 39% deionized water, and the time for adding is 30 minutes. After the addition is completed, react at room temperature for 1 hour at a speed of 2000 rpm to obtain Tetrahydrofurfuryl acrylate polymer emulsion, spare;

[0029](2) According to the mass percentage, in another reactor, add 30% deionized water, 0.5% sodium bicarbonate and 6% sodium dodecylbenzenesulfonate, stir well; then, at 200 rpm At 78°C, add a mixed solution of 15% methyl m...

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PUM

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Abstract

The invention belongs to the technical field of coatings, and specifically discloses a modified polyacrylate emulsion and a preparation method thereof. The modified polyacrylate emulsion consists of 5-21% tetrahydrofurfuryl acrylate polymer emulsion, 15% methyl methacrylate, 10-26% butyl acrylate, 2.5% hydroxyethyl acrylate, 1.5% acrylic acid, Prepared from 43% deionized water, 0.5% sodium bicarbonate, 6% sodium dodecylbenzenesulfonate and 0.5% potassium persulfate. The modified polyacrylate emulsion of the present invention, through the synchronous addition of tetrahydrofurfuryl acrylate polymer emulsion during the emulsion polymerization preparation process of polyacrylate, can obtain the modified polyacrylate emulsion with excellent emulsion stability and excellent water resistance performance. Polyacrylate emulsion.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a polyacrylate emulsion, in particular to a modified polyacrylate emulsion and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of environmental protection technology, high-performance and low-pollution coatings have become the direction of enterprise transformation and development. Among them, water-based polyacrylate emulsion coatings use water as the solvent, and the emission of volatile organic solvents is extremely small or zero. application. However, due to the introduction of hydrophilic groups such as carboxyl and hydroxyl groups into the molecular structure of polyacrylate emulsions, its water resistance is much worse than that of solvent-based polyacrylate coatings, which greatly limits its application range. Chemical cross-linking modification is to connect linear polyacrylate molecular chai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F220/18C08F120/32C09D151/00
CPCC08F120/32C08F265/06C09D151/003C08F220/1804
Inventor 陈嘉
Owner 广州科为科技有限公司