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A kind of preparation method of composite modified acrylate core-shell emulsion of montmorillonite and methacrylic acid

A technology of methacrylic acid and acrylate, applied in the field of polymer emulsion, can solve the problems of unsuitability for wide application, decreased stain resistance, expensive silicone, etc., and achieves enhanced water resistance and stain resistance, better performance, The effect of improving thermal stability and waterproof performance

Active Publication Date: 2016-08-17
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many modifications to acrylate. The silicone-modified acrylate core-shell emulsion of CN 102391412 B mentioned above is to modify the acrylate core-shell emulsion with organic silicon. Although the performance after modification is greatly improved, However, due to the high price of organic silicon, it is not suitable for wide application.
[0005] In order to overcome the disadvantages of high film-forming temperature, low film hardness, and high-temperature stickiness of acrylate during use, which lead to decreased stain resistance and poor water resistance, a comprehensive performance of water resistance, stain resistance and thermal stability was invented. Excellent emulsion has become a development trend

Method used

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  • A kind of preparation method of composite modified acrylate core-shell emulsion of montmorillonite and methacrylic acid

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Embodiment 1

[0030] A preparation method of montmorillonite and methacrylic acid composite modified acrylate core-shell emulsion, comprising the following steps:

[0031] 1) Dissolve 0.2g OP-10 (polyethylene glycol octylphenyl ether) and 0.4g SDS (sodium dodecyl sulfate) in 18mL deionized water to prepare emulsifier aqueous solution, divide it into three For each part, add 10g of n-butyl acrylate, 2g of methyl methacrylate and 0.04g of organic montmorillonite dropwise to the first part of emulsifier aqueous solution, stir while adding, fully stir and mix at room temperature, and pre-emulsify for 1h , to obtain the core monomer pre-emulsion; 2g of n-butyl acrylate, 6g of methyl methacrylate, 0.04g of organic montmorillonite and 0.2g of cross-linking monomer methacrylic acid were added dropwise to the second part of emulsifier aqueous solution , stirred while adding dropwise, fully stirred and mixed at room temperature, and pre-emulsified for 1 hour to obtain a shell monomer pre-emulsion; di...

Embodiment 2

[0037] A preparation method of montmorillonite and methacrylic acid composite modified acrylate core-shell emulsion, comprising the following steps:

[0038] 1) Dissolve 0.3g OP-10 (polyethylene glycol octyl phenyl ether) and 0.6g SDS (sodium dodecyl sulfate) in 18mL deionized water to prepare emulsifier aqueous solution, divide it into three In one part, add 10g of n-butyl acrylate, 2g of methyl methacrylate and 0.1g of organic montmorillonite dropwise into the first part of emulsifier aqueous solution, stir while adding, fully stir and mix at room temperature, and pre-emulsify for 1h , to obtain the core monomer pre-emulsion; 2g of n-butyl acrylate, 6g of methyl methacrylate, 0.1g of organic montmorillonite and 0.8g of cross-linking monomer methacrylic acid were added dropwise to the second part of emulsifier aqueous solution , stirred while adding dropwise, fully stirred and mixed at room temperature, and pre-emulsified for 1 hour to obtain a shell monomer pre-emulsion; 0.0...

Embodiment 3

[0044] A preparation method of montmorillonite and methacrylic acid composite modified acrylate core-shell emulsion, comprising the following steps:

[0045] 1) Dissolve 0.3g OP-10 (polyethylene glycol octyl phenyl ether) and 0.6g SDS (sodium dodecyl sulfate) in 18mL deionized water to prepare emulsifier aqueous solution, divide it into three In one part, add 10g of n-butyl acrylate, 2g of methyl methacrylate and 0.2g of organic montmorillonite dropwise into the first part of emulsifier aqueous solution, stir while adding, fully stir and mix at room temperature, and pre-emulsify for 1h , to obtain the core monomer pre-emulsion; 2g of n-butyl acrylate, 6g of methyl methacrylate, 0.2g of organic montmorillonite and 1.2g of cross-linking monomer methacrylic acid were added dropwise to the second part of emulsifier aqueous solution , stirred while adding dropwise, fully stirred and mixed at room temperature, and pre-emulsified for 1 hour to obtain a shell monomer pre-emulsion; 0.0...

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Abstract

The invention discloses a preparation method for compounding and modifying an acrylate core-shell emulsion through montmorillonite and methacrylic acid. The acrylate core-shell emulsion is polymerized through a core-shell emulsion by taking an emulsifying agent, a core monomer mixture and a shell monomer mixture as raw materials; the core monomer mixture comprises a soft monomer, a hard monomer and organic modified montmorillonite; and the shell monomer mixture comprises a soft monomer, a hard monomer, a cross-linking monomer and organic modified montmorillonite. The preparation method disclosed by the invention can be used for effectively enhancing the waterproofness, stability and mechanical property of the obtained emulsion by compounding and modifying the acrylate core-shell emulsion by adopting the cross-linking monomer methacrylic acid and the organic modified montmorillonite, and is simple, low in film-forming temperature and environmental-friendly. The prepared acrylate core-shell emulsion can be applied to a coating with relatively high requirements on flame retardance, heat stability and waterproofness, and is especially suitable for a fire-retardant coating.

Description

technical field [0001] The invention belongs to the field of polymer emulsions, and in particular relates to a preparation method of an acrylate core-shell emulsion compound-modified by using montmorillonite and methacrylic acid. Background technique [0002] Acrylate emulsions have excellent properties and are widely used in waterborne coatings. At present, acrylate emulsions obtained by conventional preparation methods have disadvantages such as high film-forming temperature, low film hardness, high-temperature stickiness, poor stain resistance and water resistance, etc., which limit their application range. For example, the patent CN 103992431 A discloses that a water-based acrylate emulsion is a common acrylate emulsion. Although natural emulsifier raw materials are used in the synthesis process, which is more environmentally friendly, it still cannot overcome the film-forming temperature of ordinary acrylate emulsions. High, low film hardness, high temperature sticking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F2/26C08F2/30C08F2/44C08K9/04C08K3/34
Inventor 刘治田代梦琴张旗余智朱诗瑶王成王善
Owner WUHAN INSTITUTE OF TECHNOLOGY
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