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Acrylic ester swellable rheology modifier with core-shell structure and preparation method thereof

A technology of rheology modifier and acrylate, which can be applied in the direction of coating, etc., and can solve the problems of poor water resistance and water whitening resistance of the paint film.

Active Publication Date: 2022-02-18
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above patents are all methods of synthesizing thickeners, but they all swell and stretch the entire particle, so that when used in water-based formulations, the paint film has poor water resistance or water whitening resistance.

Method used

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  • Acrylic ester swellable rheology modifier with core-shell structure and preparation method thereof
  • Acrylic ester swellable rheology modifier with core-shell structure and preparation method thereof
  • Acrylic ester swellable rheology modifier with core-shell structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] A kind of acrylate swelling type rheology modifier of core-shell structure, its synthetic formula composition is as table 1:

[0070] Table 1

[0071]

[0072] The steps of the acrylic swelling type rheology modifier of the core-shell structure synthesized by this formula are as follows:

[0073] 1) Add 1g of SDS and 250g of water into a four-necked flask, connect the condenser, start stirring, mix well, and pass nitrogen to remove the oxygen in the reactor;

[0074] 2) The configuration of the core layer monomer: add 4.51g of SDS and 87.9g of water into flask 1, stir to fully dissolve the SDS, then add 151.81g of BA, 1.19g of cross-linking monomer TMPDE and 52g of MAA in sequence, and configure it as pre-emulsion 1;

[0075] 3) Configuration of the transition layer monomer: add 0.6g of SDS and 15g of water into the flask 2, stir to fully dissolve the SDS, then add 21g of BA, 17g of EHA and 7g of MAA in sequence to form a pre-emulsion 2;

[0076] 4) Configuration ...

Embodiment 2

[0084] A kind of acrylate swelling type rheology modifier of core-shell structure, its synthetic formula composition is as table 2:

[0085] Table 2

[0086]

[0087] The synthetic process of embodiment 2 is the same as embodiment 1, repeats it no longer here, the product A2 that obtains according to this formula.

Embodiment 3

[0089] A kind of acrylate swelling type rheology modifier of core-shell structure, its synthetic formula is composed as table 3:

[0090] table 3

[0091]

[0092] The synthetic process of embodiment 3 is the same as embodiment 1, repeats it no longer here, the product A3 that obtains according to this formula.

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Abstract

The invention discloses a core-shell structure acrylate swelling type rheology modifier and a preparation method thereof. The rheology modifier has a three-layer hierarchical structure, which are: 1) a core structure layer, the The core structure layer is a slightly crosslinked copolymer containing acrylate monomers; 2) the transition layer is a non-crosslinked copolymer containing acrylate monomers; 3) the shell structure layer, The shell structure layer is a highly cross-linked copolymer containing acrylate monomers; the rheology modifier of the present invention can reduce the free water content of the system during the volume swelling process, thereby increasing the viscosity of the system, and Since the outer shell structure of the present invention will not burst, and the inner alkali-swellable hydrophilic substance will not enter the system, the effect on the water resistance and water whitening resistance of the product will be less affected.

Description

technical field [0001] The invention relates to a core-shell structure acrylate swelling type rheology modifier and a preparation method thereof, which has a three-layer hierarchical structure, which are respectively a core structure layer, a transition layer and a shell structure layer. The rheology modification The agent can be fully swelled after neutralization in water, and can form a transparent liquid to meet the rheological needs of different water-based systems. At the same time, the invention also relates to the synthesis method and application of the rheological additive. Background technique [0002] With the gradual improvement of people's requirements for environmental protection and the country's strict requirements for environmental protection, water-based coating systems have been widely used. Water-based coatings have the advantages of reducing environmental pollution, improving the operating and construction environment, and saving a lot of organic solvent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F285/00C08F265/06C08F220/18C08F220/06C08F216/12C08F222/14C08F2/26C09D7/43
CPCC08F285/00C08F265/06C08F220/18C08F2/26C09D7/43
Inventor 冯聪聪刘纪江李棒棒刘利民沈如宝纪学顺
Owner WANHUA CHEM GRP CO LTD
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