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Acrylic acid emulsion with nuclear shell structure and high thixotropy and preparation method and application of acrylic acid emulsion

A technology of acrylic emulsion and core-shell structure, which can be used in coatings and other directions to solve the problems of dullness, blackening of aluminum-silver powder, and reduction of gloss and resistance of aluminum-silver paint coatings.

Inactive Publication Date: 2019-05-17
CHANGZHOU HUAKE POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the aluminum-silver paint that this invention is made, when the air humidity is high or when the paint film is thicker when spraying, the aluminum-silver powder will still appear dull and blackened; Gloss and resistance of coatings, increasing formulation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example is a method for preparing an acrylic emulsion with a core-shell structure and high thixotropy demonstrated by the present invention, as follows:

[0028] (1) Add 232g of deionized water, 6g of anionic emulsifier SDS, and 3g of nonionic emulsifier NP-10 into a round bottom bottle, stir well and then add 14g of acrylamide, 158g of methyl methacrylate, and 56g of butyl acrylate Ester, 24g hydroxyethyl acrylate, 2g allyl methacrylate, 0.4g ammonium persulfate, stirred and dispersed at 1000rpm at room temperature for half an hour to prepare a pre-emulsion of the core layer polymer;

[0029](2) Add 397g deionized water, 0.2g SDS, and 0.1g NP-10 to the reaction bottle, stir to dissolve evenly, pass nitrogen gas for 30min, heat to 78-80°C and keep it stable, then add the pre-emulsion prepared in the first step 20g, after stirring evenly, add 0.4g of initiator ammonium persulfate and keep warm for 15min. Keep warm for 60min at ℃;

[0030] (3) Add 80g of deionized ...

Embodiment 2

[0035] This example is another preparation method of acrylic emulsion with core-shell structure and high thixotropy with different acidity shown by the present invention, as follows:

[0036] (1) Add 232g of deionized water, 6g of anionic emulsifier SDS, and 3g of nonionic emulsifier NP-10 into a round bottom bottle, stir well and then add 14g of acrylamide, 158g of methyl methacrylate, and 56g of butyl acrylate ester, 24g hydroxyethyl acrylate, 2.2g 1,6-hexanediol diacrylate, 0.4g ammonium persulfate, stirred and dispersed at 1000rpm for half an hour at room temperature, and prepared a pre-emulsion of the core layer polymer;

[0037] (2) Add 397g deionized water, 0.2g SDS, and 0.1g NP-10 to the reaction bottle, stir to dissolve evenly, pass nitrogen gas for 30min, heat to 78-80°C and keep it stable, then add the pre-emulsion prepared in the first step 20g, after stirring evenly, add 0.4g of initiator ammonium persulfate and keep warm for 15min. Keep warm for 60min at ℃;

[...

Embodiment 3

[0043] This example is another preparation method of acrylic emulsion with core-shell structure and high thixotropy with higher gloss and different acidity shown by the present invention, as follows:

[0044] (1) Add 232g deionized water, 6g SDS, 3g NP-10 into the round bottom bottle, stir well and then add 14g acrylamide, 88g methyl methacrylate, 70g styrene, 56g butyl acrylate, 24g hydroxy acrylate Ethyl ester, 2g 1,4-butanediol diacrylate, stirring and dispersing at 1000rpm at room temperature for half an hour to prepare a pre-emulsion of the core layer polymer;

[0045] (2) Add 212g deionized water, 0.2g SDS, 0.1g NP-10 to the reaction bottle, stir to dissolve evenly, pass nitrogen gas for 30min, heat to 78-80°C and keep it stable, then add the pre-emulsion prepared in the first step 20g, after stirring evenly, add 0.4g of initiator ammonium persulfate and keep warm for 15min. Keep warm for 60min at ℃;

[0046] (3) Add 80g of deionized water, 1.6g of SDS, and 0.8g of NP-...

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Abstract

The invention relates to an acrylic acid emulsion with a nuclear shell structure and high thixotropy and a preparation method and application of the acrylic acid emulsion. The preparation method comprises the following steps that firstly, a nuclear layer part is prepared through emulsion polymerization, an adopted monomer does not contain carboxyl monomers and contains a small number of crosslinking monomers; and secondly, a shell layer is prepared through emulsion polymerization, a mixture of the monomers in the second step and an initiator is dropwise added into a reaction mixing system of the first step, the monomers in the second step comprise monomers with carboxyl and crosslinking monomers, after a reaction is completed, the temperature is decreased to the specific temperature, a certain amount of amine is added to adjust PH of the emulsion, and thus the acrylic acid emulsion with the nuclear shell structure and the high thixotropy can be obtained. The acrylic acid emulsion prepared through the preparation method can be used in silver powder baking varnish coating, using of a silver powder directional agent and a thickener can be reduced when a coating formula is designed, gloss and resistance of a paint film are improved, the coating cost is lowered, and the applicability and construction tolerance of the coating formula are improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an acrylic emulsion with a core-shell structure and high thixotropy, its preparation method and application. Background technique [0002] Aluminum silver paint is a kind of paint widely used in industry. It is to disperse aluminum silver powder in the paint. After spraying, the paint film has a strong metallic flash effect. The main principle is that the flake aluminum silver powder is oriented in the paint film. Arrangement, after the light shines through various regular reflections, transmissions or interferences, people will finally see metallic luster and flashing effects of different colors depending on the angle. If you want to make the coating film have a strong metallic flash effect, you need flake aluminum silver powder in the paint film to spread like many small mirrors to reflect the external light. The flaky aluminum powder can be spread as much as possible inside ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/12C09D161/20C09D7/61C08F220/14C08F220/56C08F220/18C08F220/20C08F220/40C08F222/14C08F212/08
Inventor 隆美林徐延明王泽群蒋红娟陶威林杨
Owner CHANGZHOU HUAKE POLYMERS
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