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Preparation method of hydrophobic modified nano silicon dioxide solution, stain-resistant real stone paint and preparation method thereof

A nano-silica, hydrophobic technology, applied in coatings and other directions, can solve problems such as poor stain resistance

Pending Publication Date: 2022-01-21
DRAGON BRAND COATINGS (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a hydrophobic modified nano-silica solution, a stain-resistant real stone paint and a preparation method thereof, so as to solve the problem of poor stain resistance in the real stone paint in the prior art

Method used

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  • Preparation method of hydrophobic modified nano silicon dioxide solution, stain-resistant real stone paint and preparation method thereof
  • Preparation method of hydrophobic modified nano silicon dioxide solution, stain-resistant real stone paint and preparation method thereof
  • Preparation method of hydrophobic modified nano silicon dioxide solution, stain-resistant real stone paint and preparation method thereof

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preparation example Construction

[0018] The invention provides a method for preparing a hydrophobic modified nano-silica solution. The preparation method comprises: adding nano-silica to a solvent, then adjusting the temperature of the system to 40-60°C, adding silane coupling agent, adjusting the pH to 7-8 for modification treatment to obtain a hydrophobic modified nano-silica solution; wherein, the mass fraction of the silane coupling agent in the modified nano-silica solution is ≥9 %, ≤11%.

[0019] Among them, the inventor found through research that: when the mass fraction of the silane coupling agent in the modified nano-silica solution exceeds 11%, it will gel after 1 hour of reaction, and the resulting product has no hydrophobicity. If the mass fraction of the silane coupling agent in the modified nano-silicon dioxide solution is lower than 9%, the modified particles will not have hydrophobicity.

[0020] In the above preparation method, the average particle size of the nano-silica is not specificall...

preparation example 1

[0046] Weigh 100 grams of absolute ethanol and pour it into a 250ml three-neck flask, slowly add 10 grams of nano-silica; then slowly add vinyltrimethoxysilane with a mass fraction of 10% of the total system under stirring in a water bath at 50°C, and adjust the pH so that the system the pH value to 7.5, and reacted for 4 hours to obtain a modified nano-silica solution.

preparation example 2

[0048] Follow the method of Preparation Example 1, with the only difference: slowly add 10.8% vinyltrimethoxysilane to the total system mass fraction under stirring in a water bath at 50°C, and adjust the pH so that the pH of the system reaches 7.

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Abstract

The invention discloses a preparation method of a hydrophobic modified nano silicon dioxide solution, a stain-resistant real stone paint and a preparation method thereof.The preparation method of the stain-resistant real stone paint comprises the steps: 1) adding a bactericide, cellulose, a pH regulator, an anti-freezing agent, a coalescing agent and the modified nano silicon dioxide solution sequentially into water for first mixing to prepare a mixture; (2) sequentially adding styrene-acrylic emulsion and a defoaming agent into the mixture, and carrying out secondary mixing so as to prepare paint paste; (3) adding a thickening agent into the paint paste, and carrying out third mixing so as to adjust the viscosity of the system to be 100-110 KU; and then adding the colored sand and carrying out fourth mixing to prepare the stain-resistant real stone paint. The stain-resistant real stone paint solves the problem of poor stain resistance of real stone paint in the prior art.

Description

technical field [0001] The invention relates to the field of real stone paint, in particular to a method for preparing a hydrophobic modified nano-silica solution, a stain-resistant real stone paint and a preparation method thereof. Background technique [0002] Natural stone paint is a kind of paint formulated with different particle sizes of natural granite and other natural gravel and stone powder as the main material, synthetic resin or synthetic resin emulsion as the main binder, and a variety of additives. Natural stone paint is a high color retention, water-based environmental protection architectural coating with good water resistance, alkali resistance, good weather resistance and strong adhesion. Natural real stone paint has the decorative effect of granite, marble, natural rock and other stone materials, and has natural color, real texture, hard stone-like finish, giving people a solemn, elegant and luxurious visual enjoyment. Natural stone paint is widely used, ...

Claims

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Application Information

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IPC IPC(8): C09D7/62C09D1/00
CPCC09D7/62C09D1/00C09D7/67
Inventor 张晓军胡中源陈燕郑毅
Owner DRAGON BRAND COATINGS (BEIJING) CO LTD