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Acrylic acid microgel emulsion having automatic restoration function and preparation method thereof

A self-healing, acrylic technology, applied in the direction of coating, etc., can solve the problems of high VOC emission, poor sagging and mechanical properties, no self-healing function, etc., to achieve improved acid and solvent resistance, excellent performance, and high solid content Effect

Active Publication Date: 2017-02-15
安徽优科新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of high VOC emission, no self-healing function and poor sagging and mechanical properties in existing coatings, the present invention provides an acrylic microgel emulsion with self-healing function and a preparation method thereof. The acrylic microgel emulsion includes The shell and core have the advantages of low VOC emissions and high solid content. When the emulsion is sprayed at room temperature, the shell will not break and the core colloid will not be released. When there are scratches, use 80 ℃ hot water to clean the scratches. The shell becomes soft and collapses when heated, releasing the core colloid, which gradually fills the scratches when heated, and the self-crosslinking reaction hardens, making the scratches shallower and disappearing

Method used

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  • Acrylic acid microgel emulsion having automatic restoration function and preparation method thereof
  • Acrylic acid microgel emulsion having automatic restoration function and preparation method thereof
  • Acrylic acid microgel emulsion having automatic restoration function and preparation method thereof

Examples

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Embodiment 1

[0041] A kind of acrylic acid microgel emulsion with self-healing function, it is characterized in that: comprise shell and core, the composition of described shell and each component mass fraction are:

[0042]

[0043] The composition of described core and each component mass fraction are:

[0044]

[0045] The solid content of the acrylic microgel emulsion in this example is 45%.

[0046] The preparation method of above-mentioned acrylic acid microgel emulsion is:

[0047] (1) adding 47% ethanol in proportion to the reactor and heating to reflux state;

[0048](2) 9% styrene, 10% lauryl methacrylate, 1% acrylic acid, 15% hydroxyethyl methacrylate, 3% glycidyl methacrylate, 10% methacryloxypropyl trimethoxy The mixture solution was obtained after mixing silane and 1.5% azobisisoheptanonitrile, and the mixture solution was added dropwise to the reactor within 3 hours. After the dropwise addition, it was reacted for 1 hour and then added dropwise with 3% ethanol and 0....

Embodiment 2

[0055] A kind of acrylic acid microgel emulsion with self-healing function, it is characterized in that: comprise shell and core, the composition of described shell and each component mass fraction are:

[0056]

[0057] The composition of described core and each component mass fraction are:

[0058]

[0059]

[0060] The solid content of the acrylic microgel emulsion in this example is 42%.

[0061] The preparation method of above-mentioned acrylic acid microgel emulsion is:

[0062] (1) adding 45% ethanol in proportion to the reactor and heating to reflux state;

[0063] (2) 3% styrene, 30% lauryl methacrylate, 2% acrylic acid, 8% hydroxyethyl methacrylate, 4% glycidyl methacrylate, 4% methacryloxypropyl trimethoxy After mixing silane and 0.5% azobisisoheptanonitrile to obtain a mixture solution, the mixture solution was added dropwise to the reactor within 3 hours, and after the dropwise addition, reacted for 1 hour and then added dropwise 3% ethanol and 0.5% azo...

Embodiment 3

[0070] A kind of acrylic acid microgel emulsion with self-healing function, it is characterized in that: comprise shell and core, the composition of described shell and each component mass fraction are:

[0071]

[0072] The composition of described core and each component mass fraction are:

[0073]

[0074] The solid content of the acrylic microgel emulsion in this example is 40%.

[0075] The preparation method of above-mentioned acrylic acid microgel emulsion is:

[0076] (1) adding 35% ethanol in proportion to the reactor and heating to reflux state;

[0077] (2) 15% styrene, 26% lauryl methacrylate, 3% acrylic acid, 5% hydroxyethyl methacrylate, 10% glycidyl methacrylate, 1% methacryloxypropyl trimethoxy The mixture solution was obtained after mixing base silane and 1.5% azobisisoheptanonitrile, and the mixture solution was added dropwise to the reactor within 3 hours. After the dropwise addition, 3% ethanol and 0.5% azobis Isoheptanonitrile was kept reacting fo...

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Abstract

The invention discloses an acrylic acid microgel emulsion having the automatic restoration function and a preparation method thereof, and belongs to the technical field of a modified coating. The acrylic acid microgel emulsion comprises a shell layer and a core, wherein the shell layer includes a shell solution, water, isobornyl methacrylate, butyl methacrylate, alkylphenol polyoxyethylene, sodium dodecanesulphonate and potassium persulphate, and the core includes styrene, lauryl methacrylate, acrylic acid, hydroxyethyl methylacrylate, glycidyl methacrylate, 3-glycidoxypropyltrimethoxysilane, 2,2'-azobis (2,4-dimethyl) valeronitrile and ethanol. The emulsion has the advantages of low VOC discharge capacity and high solid content. The shell layer doesn't crack and the core colloid isn't released when the emulsion is sprayed at the room temperature. When a scratch appears, hot water with the temperature of 80 DEG C is used to wash the scratch, and the shell layer is heated, softened, and collapsed to release the core colloid. The core colloid is heated and softened to gradually fill the scratch, is self-cross-linked, and is hardened, so that the scratch is lightened and disappeared.

Description

technical field [0001] The invention belongs to the technical field of modified coatings, and more specifically relates to an acrylic microgel emulsion with automatic repair function and a preparation method thereof. Background technique [0002] With the requirements of environmental protection, more and more attention has been paid to the emulsion, which only contains 3-8% solvent, which greatly reduces the emission of VOC. Microgel (also known as microgel) is a new type of functional polymer under development, which has significant advantages in improving paint film sagging and mechanical properties. As early as 1934, Staudinger et al. successfully synthesized microgel Glue, Funke has done a lot of theoretical and experimental work on microgels, especially reactive microgels, which are prepared by emulsion polymerization of polyfunctional monomers of divinylbenzene or ethylene glycol dimethacrylate Active microgels, and a definition of microgels is given. After years of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F220/18C08F220/06C08F212/08C08F220/32C08F230/08C08F2/26C08F2/30C08F2/22C09D133/14
CPCC08F2/22C08F2/26C08F2/30C08F220/18C08F220/1812C08F220/28C08F220/281C09D143/04C08F220/1804C08F220/06C08F212/08C08F220/325C08F230/08
Inventor 王世玉曹志华
Owner 安徽优科新材料科技有限公司
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