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A kind of anti-cracking coating modified by methyltriethoxysilane and preparation method thereof

A methyltriethoxysilane and anti-cracking technology, which is applied in the field of methyltriethoxysilane modified anti-cracking coatings and its preparation, can solve problems such as fading, efflorescence, and affecting the appearance of buildings, and achieve structural Uniform, large specific surface area effect

Active Publication Date: 2019-06-21
上海轩颂建筑科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the process of using exterior wall coatings, cracks will appear due to various reasons. The main reason is that the coatings on the surface of the exterior walls have been exposed to wind and rain in the natural environment, and different depths are bent and deformed due to different stresses, resulting in A large number of criss-cross and irregular cracks appear on the exterior wall
The generation of cracks makes rainwater seep into the wall, causing problems such as efflorescence, fading, and powdering around the cracks, which seriously affects the appearance of the building. At the same time, the cracks will also have adverse effects on the interior of the building, and even shorten the building life span
At present, for the problem of building cracks, most of the solutions focus on the treatment of the wall substrate before the paint is painted, but the effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (a) Dissolve 550g of 10nm silicon oxide powder in deionized water and stir in a water bath at 37°C for 20 minutes; dissolve 50g of methyltriethoxysilane in ethanol solution. Slowly add the ethanol solution of methyltriethoxysilane to the silicon oxide solution in a water bath at 37°C, and dry the obtained methyltriethoxysilane-modified silicon oxide at 100°C;

[0028] (b) 400g of acrylic resin, 300g of CaCO 3 1. Put 300g of white cement into a ball mill, stir and grind evenly to reach 200 mesh;

[0029] (c) Put the above-mentioned methyltriethoxysilane-modified silicon oxide and 200-mesh mixture into a ball mill, and grind for 1.5 hours;

[0030] (d) Filter the above mixture with a 200-mesh sieve to remove large particles, add 26g of dispersant, 10g of defoamer, 20g of fiber thickener, 2g of anti-mold agent and 342g of water to obtain a particle size of 200 mesh. Triethoxysilane modified anti-crack coating.

[0031] Utilize the methyltriethoxysilane modified anti-cra...

Embodiment 2

[0043] (a) Dissolve 630g of 10nm silicon oxide powder in deionized water and stir in a water bath at 40°C for 20 minutes; dissolve 70g of methyltriethoxysilane in ethanol solution. Slowly add the ethanol solution of methyltriethoxysilane to the silicon oxide solution in a water bath at 40°C, and dry the obtained methyltriethoxysilane-modified silicon oxide at 100°C;

[0044] (b) 300g of acrylic resin, 600g of CaCO 3 1. Put 100g of white cement into a ball mill, stir and grind evenly to reach 200 mesh;

[0045] (c) Put the above-mentioned methyltriethoxysilane-modified silicon oxide and 200-mesh mixture into a ball mill, and grind for 3 hours;

[0046] (d) Filter the above mixture with a 200-mesh sieve to remove large particles, add 14g of dispersant, 2g of defoamer, 40g of fiber thickener, 22g of anti-mold agent and 122g of water to obtain a particle size of 200 mesh. Triethoxysilane modified anti-crack coating.

[0047] Utilize the component and the mass percentage content...

Embodiment 3

[0059] (a) Dissolve 640g of 10nm silicon oxide powder in deionized water and stir in a water bath at 39°C for 20 minutes; dissolve 60g of methyltriethoxysilane in ethanol solution. Slowly add the ethanol solution of methyltriethoxysilane to the silicon oxide solution in a water bath at 39°C, and dry the obtained methyltriethoxysilane-modified silicon oxide at 100°C;

[0060] (b) 340g of acrylic resin, 400g of CaCO 3 1. Put 200g of white cement into a ball mill, stir and grind evenly to reach 200 mesh;

[0061] (c) Put the above-mentioned methyltriethoxysilane-modified silicon oxide and 200-mesh mixture into a ball mill, and grind for 2 hours;

[0062] (d) Filter the above mixture with a 200-mesh sieve to remove large particles, add 20g of dispersant, 6g of defoamer, 30g of fiber thickener, 10g of anti-mold agent and 294g of water to obtain a particle size of 200 mesh. Triethoxysilane modified anti-crack coating.

[0063] Utilize the component and the mass percentage content o...

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Abstract

The invention discloses methyl-triethoxysilane-modified anti-cracking paint and a preparation method thereof. The paint is prepared from, by weight, 30-40% of methyl-triethoxysilane-modified silicon oxide, 15-20% of acrylic resin, 15-30% of CaCO3, 5-15% of white cement, 1-2% of cellulosic thickener, 0.7-1.3% of dispersing agent, 0.1-1.1% of mildew preventive, 0.1-0.5% of defoaming agent and the balance water according to the total mass percentage of 100 wt%. By means of the paint and the method, the finally prepared methyl-triethoxysilane-modified anti-cracking paint is uniform, and therefore it can be ensured that the stress is the same in different places in the use process of the paint, and the anti-cracking aim is achieved.

Description

technical field [0001] The invention relates to a composite paint and a preparation method thereof, in particular to a methyltriethoxysilane modified anti-cracking paint and a preparation method thereof. Background technique [0002] The main function of building exterior wall coatings is to decorate and protect the exterior walls of buildings, making buildings neat and beautiful, thereby achieving the purpose of beautifying the environment. At the same time, building exterior wall coatings can also protect buildings and prolong their service life. Exterior wall paint has the advantages of various designs and colors, convenient construction, light weight, easy renovation, high efficacy, and low cost. Therefore, it is increasingly favored by architectural designers and real estate developers, and its development and application prospects are very broad. [0003] However, in the process of using exterior wall coatings, cracks will appear due to various reasons. The main reason...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B24/42
CPCC04B24/425C04B28/04C04B2111/00482C04B14/28C04B24/2641C04B2103/408C04B2103/50C04B2103/44C04B2103/69
Inventor 不公告发明人
Owner 上海轩颂建筑科技股份有限公司
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