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Ordinary temperature curing high-hardness organic-inorganic hybrid coating as well as preparation and use method thereof

A room temperature curing, high hardness technology, applied in the direction of coating, etc., can solve the problems of limiting application range, increasing energy consumption, and easy gelation of products, and achieve the effect of overcoming easy gelation

Active Publication Date: 2014-08-06
西藏宣和新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many researches at home and abroad on improving the coating hardness and adhesion of silica-based organic-inorganic hybrid materials, but they are often done by increasing the degree of hydrolysis of the sol system, and using medium or high temperature heating and baking or UV curing. To obtain a hybrid coating with higher hardness and adhesion, it is difficult to surface treat large parts, and at the same time increase energy consumption, resulting in inconvenient coating construction and limiting its application range; and the prepared hybrid coating has poor leveling , the film formation is unstable, and the product is easy to gel, and the storage period is short

Method used

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  • Ordinary temperature curing high-hardness organic-inorganic hybrid coating as well as preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) A component amino-modified organic-inorganic hybrid sol: add 70g of γ-aminopropyltrimethoxysilane, 10g of ethyl orthosilicate, 70g of ethanol and 5g of water into the reactor, and stir evenly at room temperature; Add a mixed liquid of 0.1g hydrochloric acid (37%) and 2g water at 10°C, condense and reflux at 60°C for 1 hour; then age at room temperature for 8 hours to obtain an amino-modified organic-inorganic hybrid sol ;

[0043] (2) B-component epoxy-modified organic-inorganic hybrid sol: add γ-(2,3-epoxypropoxy)propyltrimethoxysilane 70g, methyl orthosilicate 5g, 5g of diphenyldimethoxysilane, 18g of ethanol and 5g of water, stir well at room temperature; at 30°C, add a mixed liquid of 0.5g of hydrochloric acid (37%) and 2g of water, and reflux for 1h at 50°C ; Then aging 20h at room temperature to obtain epoxy-modified organic-inorganic hybrid sol;

[0044] Components A and B are mixed at a weight ratio of 8:7 and stirred evenly to form a two-component organic...

Embodiment 2

[0053] (1) Amino-modified organic-inorganic hybrid sol of component A: add 10g of γ-aminopropyltrimethoxysilane, 5g of methyltriethoxysilane, 2g of phenyltriethoxysilane, 80g of ethanol, 5g of propanol, and 5g of water were stirred evenly at room temperature; condensed and refluxed for 3 hours at 40°C; then aged for 48 hours at room temperature to obtain the amino-modified organic-inorganic hybrid sol;

[0054] (2) B component epoxy modified organic-inorganic hybrid sol: add 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane 10g, methyl orthosilicate to the reactor 5g, 80g of isopropanol, stirred at room temperature; at 60°C, add a mixed liquid of 0.003g hydrochloric acid (37%) and 2.5g of water, at 60°C, reflux for 8h; then age at room temperature 72h, to obtain epoxy modified organic-inorganic hybrid sol;

[0055] Components A and B are mixed at a weight ratio of 1:10, stirred evenly, and then configured into a two-component organic-inorganic hybrid coating that can be cured at ro...

Embodiment 3

[0064] (1) Amino-modified organic-inorganic hybrid sol of component A: add 50g of N-β(aminoethyl)-γ-aminopropyltrimethoxysilane, 20g of ethyl orthosilicate, methyl 10g of trimethoxysilane, 80g of methanol and 0.1g of water were stirred at room temperature; at 30°C, a mixed liquid of 0.5g of hydrochloric acid (37%) and 2g of water was added, and reflux was condensed for 3h at 50°C; Aging at room temperature for 4 hours to obtain amino-modified organic-inorganic hybrid sol;

[0065] (2) Component B epoxy modified organic-inorganic hybrid sol: add 50g of 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane, 5g of methyl orthosilicate, 28g of 1,2-bistriethoxysilylethane, 50g of ethanol, 5g of n-butanol and 1g of water, stir well at room temperature; add 0.5g of phosphoric acid (85%) and 40g of water at 35°C , at 40°C, condensed and refluxed for 8 hours; then aged at room temperature for 20 hours to obtain epoxy-modified organic-inorganic hybrid sol;

[0066] Components A and B are mixe...

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Abstract

The invention belongs to the technical field of hybrid coatings, and discloses an ordinary temperature curable high-hardness silicon dioxide-based organic-inorganic hybrid coating as well as a preparation and use method thereof. The coating comprises a component A and a component B, wherein the component A is amino modified organic-inorganic hybrid sol; the component B is epoxy modified organic-inorganic hybrid sol. On the basis of siloxy hydrolytic condensation reaction, epoxy groups and amino groups are reacted to prepare a reaction type double-component silicon dioxide-based organic-inorganic hybrid coating, and with the combination of inorganic hydrolytic condensation and organic chemical reaction, the ordinary temperature curing process of a coating system is accomplished, and the prepared coating overcomes the defects that an existing coating is easy to gel, the storage period is relatively short and the like; after being used, the coating is excellent in property, has various special functions of high hardness, high adhesion, wearing resistance, scrapping resistance, corrosion resistance and the like in a thickness as low as 1-50 mu m, and can be widely applied to various fields, such as buildings, the electric appliance and electronic industry, the machine industry and household articles.

Description

technical field [0001] The invention belongs to the technical field of hybrid coatings, and in particular relates to a normal-temperature-curable, high-hardness, silicon dioxide-based organic-inorganic hybrid coating and a preparation and application method thereof. Background technique [0002] The organic-inorganic hybrid material is a composite material with excellent performance. It combines the organic phase into the inorganic network through certain physical and chemical methods, and forms an interpenetrating organic-inorganic network; the organic phase and the inorganic phase pass through Chemical bonds (covalent bonds and coordination bonds), hydrogen bonds, or van der Waals forces are combined at the nanometer level, and the phase separation size is not larger than the nanometer level. Organic-inorganic materials are homogeneously dispersed multiphase materials. The interface area between the organic phase and the inorganic phase is very large and the interfacial in...

Claims

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Application Information

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IPC IPC(8): C09D183/08C09D183/06C09D7/12
Inventor 刘云晖
Owner 西藏宣和新材料股份有限公司
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