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Surface modified nano silicon dioxide and acrylic resin coating containing the same

A technology for surface modification of nano and nano silica, which is applied in coatings, fibrous fillers, dyed low-molecular organic compounds, etc., can solve the problems that direct blending is difficult to achieve effectively, and cannot achieve synergistic effects, etc., to achieve a good surface Glossiness, excellent oil and water resistance effects

Inactive Publication Date: 2009-08-05
浙江池河科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the direct blending of fluorine-containing resin or fluorine-containing compound with acrylic resin and nano-silica is difficult to effectively realize, therefore, in the prior art, the characteristics of fluorine-containing compound and nano-silica cannot be combined with acrylic resin-based synergistic effect in coatings

Method used

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  • Surface modified nano silicon dioxide and acrylic resin coating containing the same
  • Surface modified nano silicon dioxide and acrylic resin coating containing the same
  • Surface modified nano silicon dioxide and acrylic resin coating containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The 0.5 mole molecular formula is:

[0064]

[0065] Compound C (manufacturer: Zhejiang Juhua Group Co., Ltd.) and 0.5 mole of 3-mercaptopropyltrimethoxysilane (compound D) were mixed in a round bottom flask, diluted with a small amount of anhydrous ether, and reacted under slow reflux conditions After 2 hours, the solvent was evaporated to obtain the molecular formula:

[0066]

[0067] Compound B, the product is a colorless transparent liquid.

[0068] In parts by weight, 23 parts of silicon dioxide (manufacturer: Zhejiang Wanjing Material Co., Ltd.), 21 parts of isopropanol, 9 parts of water, 3-(methacryloyloxy ) 10 parts of propyltrimethoxysilane (compound A) and 4 parts of compound B obtained by the above steps were put into a three-neck flask, then added dilute hydrochloric acid solution to adjust pH=4~5, stirred at 75°C, and reacted for 3 hours After cooling, the acrylate functionalized and perfluoroalkoxy surface-modified nano-silica is obtained, and the...

Embodiment 2

[0072] Replace 3-mercaptopropyltrimethoxysilane (compound D) in Example 1 with 3-aminopropyltriethoxysilane (compound D), and other conditions are all the same as in Example 1, and the molecular formula obtained is:

[0073]

[0074] Compound B and the corresponding acrylate-functionalized and perfluoroalkoxy-surface-modified nanosilica.

[0075] The silicon-containing fluorine-containing acrylic resin coating was prepared according to the same method as in Example 1 and cured by light to form a silicon-containing fluorine-containing acrylic resin coating film.

Embodiment 3

[0077] With 3-aminopropyltrimethoxysilane (compound D) instead of 3-mercaptopropyltrimethoxysilane (compound D) in Example 1, other conditions are all the same as in Example 1, and the molecular formula obtained is:

[0078]

[0079] Compound B and the corresponding acrylate-functionalized and perfluoroalkoxy-surface-modified nanosilica.

[0080] The silicon-containing fluorine-containing acrylic resin coating was prepared according to the same method as in Example 1 and cured by light to form a silicon-containing fluorine-containing acrylic resin coating film.

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Abstract

The invention discloses a nano-silicon dioxide which is functionalized by acrylic ester and modified on surface by perfluoro alkoxy, a method for preparing the nano-silicon dioxide, and an acrylic resin coating containing the nano-silicon dioxide. The acrylic resin coating containing the nano-silicon dioxide also contains single-functional acrylic ester, acrylic ester containing at least two acrylic ester groups, alcoholic solvent and evocating agent. The acrylic resin coating containing fluorine and silicon can be quickly solidified, and the coating film hereby formed has excellent oil resistance, water resistance, weather resistance, pollution resistance, surface hardness and surface gloss.

Description

technical field [0001] The invention relates to surface-modified nano silicon dioxide and fluorine-containing acrylic resin paint containing the nano silicon dioxide. Background technique [0002] Acrylate resin / nano-silica composite is an important component of high-performance coatings, and the resulting coating film has excellent hardness and scratch resistance. In order to achieve good compatibility between nano-silica and organic components such as acrylate resins in coatings, the surface of nano-silica is usually modified first, such as acrylate functionalization. The surface chemical modification of nano-silica is usually carried out by using the esterification or condensation reaction of the hydroxyl functional groups on its surface. For example, CN1978553 discloses nano silicon dioxide grafted with organic functional molecules on the surface and its preparation method. On the other hand, fluorine-containing resins or materials modified with fluorine-containing com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/08C09D4/00C09D7/00
Inventor 江黎明陈耀祖
Owner 浙江池河科技有限公司
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