Photochromic stone-like coating for building external walls

A technology for building exterior walls and causing discoloration, which is applied in the field of architectural coatings and paints, and can solve problems such as low binding force, complexity, and harsh outdoor environments, and achieve a long-lasting effect of discoloration performance

Inactive Publication Date: 2020-04-21
安徽科创美涂料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of physical mixing, the bonding force between raw materials is not high, as a building exterior wall c

Method used

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  • Photochromic stone-like coating for building external walls
  • Photochromic stone-like coating for building external walls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0009] Embodiment 1-3 provides a kind of photochromic real stone paint coating for building exterior wall, and wherein the component of color-changing architectural coating and content thereof are as shown in Table 1:

[0010] Components and content thereof of table 1 embodiment 1-3 color-changing architectural coatings

[0011]

[0012]

[0013] The preparation method of above-mentioned photochromic real stone paint coating specifically comprises the following steps:

[0014] S1. Preparation of small molecule compounds with photochromic functional groups: Mix 1-allyl-2,3,3-trimethylindoline and 5-chlorosalicylaldehyde in ethanol solution, react The temperature was 60° C. and refluxed for 6 hours to finally generate 1-allyl-6-chlorospiro[2H-1-benzopyran-2,2′-indoline].

[0015] S2, emulsion polymerization prepares photochromic pure acrylic emulsion: methyl methacrylate, acrylic acid, initiator (benzoyl peroxide) and N, N-dimethylformamide, 1-allyl-6-chloro Spiro[2H-1-b...

Embodiment 2

[0019] The defoamer in Example 2 is aliphatic defoamer; the electronic conductive agent is polypyrrole; the amine compound is ammonia water.

Embodiment 3

[0020] The defoamer in Example 3 is simethicone; the electronic conductive agent is polypyrrole; the amine compound is a mixture of ammonium bicarbonate and ammonium chloride.

[0021] In order to further illustrate the beneficial effects of the present invention, the photochromic real stone paint coating prepared in Example 1 of the present invention is selected, according to the JB / T9327-1999 whiteness meter standard. Coat the prepared photochromic real stone paint on a polytetrafluoroethylene board, air-dry to form a film with a film thickness of 1mm, and irradiate it with ultraviolet light with a wavelength of 280nm-350nm for 5 minutes, and immediately use a whiteness meter (WSB- 2) To test the whiteness, remove the ultraviolet light for 5 minutes and then test the whiteness value. Table 2 shows the change of whiteness.

[0022] Table 2 Changes in whiteness under different lighting conditions

[0023] Lighting time 0 minutes 5 minutes 5 minutes after remova...

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Abstract

The invention relates to the field of building coatings and paints. The invention discloses a photochromic stone-like coating for a building external wall. The coating is prepared from the following raw materials in parts by weight: 5.8-6 parts of 1-allyl-6-chlorospiro[2H-1-benzopyran-2,2'-indoline], 45-50 parts of acrylic acid, 5-10 parts of N, N-dimethylformamide, 30-35 parts of methyl methacrylate, 0.5-0.6 part of an emulsifier, 0.2-0.3 part of an initiator, 0.025-0.03 part of a leveling agent, 0.025-0.03 part of a defoamer, 0.055-0.06 part of an electronic conductive agent, 0.085-0.09 partof an amine compound, 2.5-3.0 parts of natural colored quartz sand and 0.025-0.03 part of magnesium aluminum silicate. The preparation method comprises the following steps: adding a micromolecular compound 1-allyl-6-chlorospiro[2H-1-benzopyran-2,2'-indoline] with a photochromic functional group into a polymer main chain through a copolymerization method so that the photochromic stone-like coatingis prepared. Compared with a color-changing coating obtained by physically mixing color-changing powder in the prior art, the photochromic stone-like coating has the advantages that the color-changing performance is more durable, and the photochromic stone-like coating can adapt to outdoor environments.

Description

technical field [0001] The invention relates to the field of architectural coatings and paints, in particular to a photochromic real stone paint coating for building exterior walls. Background technique [0002] With the development of science and technology, many building materials such as building real stone paint and exterior wall coatings have higher and higher requirements for decorative functionality, not only requiring decorative effects, but also lighting effects to meet the needs of urban light shows. As a result, photochromic architectural real stone paint came into being. By adding some photochromic substances that change within a certain range of light wavelengths to the formula, the real stone paint exterior wall paint has a color-changing function, thereby changing the lighting effect of the wall. It has great application value in real life. Chinese patent, application number is 201310394858.6 A kind of photochromic paint, is to change the function of paint by...

Claims

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Application Information

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IPC IPC(8): C09D133/02C09D5/29C09D7/61C08F220/06C08F220/14C08F224/00
CPCC08F220/06C09D5/29C09D133/16C09D7/61C08F220/14C08F224/00C08K13/02C08K3/36C08K3/34
Inventor 高先银郭庆徐春科
Owner 安徽科创美涂料科技股份有限公司
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