A kind of preparation method of self-extinction matte emulsion with gemini structure

A self-extinction, emulsion technology, applied in the field of exterior wall building materials and coatings, can solve the problems of settlement, low gloss, limited addition, etc., and achieve the effect of broad application prospects, high stability and low cost

Active Publication Date: 2021-06-01
FIRST NEW MATERIAL TECH DEV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the characteristics of the matting powder material itself, it is difficult to disperse the matting powder in the polymer emulsion, and it is prone to sedimentation after long-term storage
In addition, due to the poor transparency of the matting powder, it is easy to cause the paint film to appear white and reduce the permeability.
[0003] That is, most of the existing water-based matte finish varnish technologies are prepared by adding matting powder, which is difficult to disperse in polymer emulsions and is prone to sedimentation after long-term storage; the matting powder has poor transparency and easily causes the paint film to turn white. The phenomenon of reduced permeability; matting powder has strong thickening properties at the same time, the amount of addition is limited, and it is difficult to produce products with lower gloss

Method used

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  • A kind of preparation method of self-extinction matte emulsion with gemini structure
  • A kind of preparation method of self-extinction matte emulsion with gemini structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 20.6g of dodecyl tertiary amine and 10g of hydrochloric acid to fully mix, then add 25g of ethanol and 20.6g of dodecyl tertiary amine, after stirring evenly, drop 5g of epichlorohydrin in 1h, after titration, at 60 Continue to stir and react at ℃ for 6h to obtain a mixed liquid containing hydroxyl gemini surfactant.

[0021] (2) Weigh 190g of water and add it to (1), use the AMP-95 adjustment system to adjust the pH of the system to 8-10, add 30g of methyltrimethoxysilane, stir well, add 700g of hydroxyacrylic acid emulsion, and continue at room temperature The reaction was stirred for 1 hour, and after the reaction was completed, a self-dulling matte emulsion was obtained.

Embodiment 2

[0023] (1) Weigh 32.4g hexadecyl tertiary amine and 12g hydrochloric acid and fully mix, then add 35g ethylene glycol and 32.4g dodecyl tertiary amine, after stirring evenly, drop 5g epichlorohydrin in 1h, after titration, in The reaction was continued at 65°C for 6 hours to obtain a mixed liquid containing hydroxyl gemini surfactants.

[0024] (2) Weigh 150g of water and add it to (1), use the AMP-95 adjustment system to adjust the pH of the system to 8-10, add 45g of phenyltrimethoxysilane, stir well, add 700g of hydroxyacrylic acid emulsion, and continue at room temperature The reaction was stirred for 1 hour, and after the reaction was completed, a self-dulling matte emulsion was obtained.

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Abstract

A preparation method of a self-dulling matte emulsion with a gemini structure, through the self-association of the gemini surface active groups on the polymer chain, the surface flatness of the paint film is reduced during the drying process, the gloss is reduced, and a matte effect is produced , the method can obtain a paint film with a matte effect without adding matting powder, has the characteristics of low cost, high stability and the like, and has broad application prospects.

Description

Technical field: [0001] The invention relates to a preparation method of a self-extinction matte emulsion with a gemini structure, and belongs to the field of building materials and coatings for exterior walls. Background technique: [0002] With the improvement of people's living standards, there are higher requirements for architectural coating. In order to further protect the exterior wall coating, the exterior wall architectural coating usually needs to be painted with water-based varnish after construction, so as to improve the weather resistance, stain resistance and special decorative effect of the coating. The current water-based varnishes mainly use water-based pure acrylic emulsion and fluorosilicon-modified acrylic acid as the main film-forming materials, which are characterized by smooth paint film and high gloss, but it is easy to produce light difference and blooming phenomenon in the process of large-scale construction . The emergence of water-based matte fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02
CPCC08G81/025
Inventor 宫理想赵雅文刘东华张淑平
Owner FIRST NEW MATERIAL TECH DEV
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