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Hydrophobic scratch-resistant coating on organic polymer surface and preparation method thereof

A polymer and scratch-resistant technology, applied in the field of UV-curable coating materials, can solve the problems of decreased transmittance, easy shedding, macroscopic phase separation, etc., and achieve the effect of strong adhesion, high hardness and good hydrophobicity

Inactive Publication Date: 2011-12-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1772820A reported that adding 0.1~8.0% wear-resistant-hardness additives in traditional UV-curable coatings can improve the wear resistance of coatings to a certain extent, but there is a problem of incompatibility between inorganic fillers and resins, which even leads to Macroscopic phase separation, the improvement of wear resistance is not obvious, and the transmittance decreases
Although a film or surface with a micro-nano composite structure has a contact angle greater than 150° and a low hysteresis effect, such a film or surface has poor mechanical strength and is easy to fall off

Method used

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  • Hydrophobic scratch-resistant coating on organic polymer surface and preparation method thereof
  • Hydrophobic scratch-resistant coating on organic polymer surface and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In a reactor equipped with a stirrer and a dropping funnel, add 46.8g of ethyl orthosilicate, 168g of γ-methacryloxytrimethoxysilane, and 53.7g of ethanol, stir at room temperature for 10 minutes, mix 9g of silica sol, 0.4 1 g of nitric acid and 58.5 g of water were evenly mixed and placed in a dropping funnel, added dropwise in 0.5-1 hour, stirred for 6-8 hours, and aged for 24 hours to obtain an organic-inorganic hybrid resin.

Embodiment 2

[0057] In a reactor equipped with a stirrer and a dropping funnel, add 46.8g of tetraethyl orthosilicate, 168g of γ-methacryloxytrimethoxysilane, and 53.7g of ethanol, stir at room temperature for 10 minutes, mix 18g of silica sol, 0.41 1 g of nitric acid and 52.2 g of water were evenly mixed, placed in a dropping funnel, added dropwise in 0.5-1 hour, stirred and aged for 6-8 hours, and aged for 24 hours to obtain an organic-inorganic hybrid resin.

[0058] 2. Preparation of organic-inorganic hybrid UV-curable coatings for bottom coating

Embodiment 3

[0060] Resin 97.5g, polyurethane acrylate 11.2g, epoxy acrylate 8.4g, trimethylolpropane triacrylate 8.4g, photoinitiator Darocur 1173 1.12g, leveling agent 0.38g that embodiment 1 makes, mix Stir evenly to prepare an organic-inorganic hybrid paint.

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Abstract

The invention relates to a hydrophobic scratch-resistant coating on the surface of an organic polymer and a preparation method thereof. The coating is a double-layer coating, and the first layer (bottom layer) is composed of 30-70% organic-inorganic hybrid resin, 20- The organic-inorganic hybrid coating composed of 50% oligomer, 5-25% reactive diluent, 1-2% photoinitiator and 0.2-3% additive is formed by UV curing; the second layer (top layer ) includes particles hydrophobically modified with an unsaturated double bond-containing organosilicon monomer, which particles are immobilized by a UV-curable resin. The coating has the characteristics of strong adhesion, high hardness, and good hydrophobicity, and can be used for coating protection of organic polymer surfaces.

Description

technical field [0001] The invention relates to an ultraviolet light-curable coating material, in particular to a hydrophobic scratch-resistant organic-inorganic hybrid ultraviolet light-curable coating and a coating preparation method, which are specifically used for plastic surfaces. Background technique [0002] Organic polymer materials have many excellent properties, such as processing performance, weather resistance, good electrical insulation, excellent optical properties, and are light and tough. They have been widely used in agriculture, aviation, construction, transportation, optical instruments and other fields. With the development of science and technology, this material has been applied in new high-end products, such as new organic displays, optical lenses and devices, high-grade decorative materials, sound barriers, aviation windows, high-speed rail train windows, organic biological containers, advanced packaging materials etc. However, compared with glass, t...

Claims

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Application Information

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IPC IPC(8): B32B5/30B32B33/00C09D183/07C09D183/08C08J7/04
Inventor 孙小英施利毅杭建忠王加男金鹿江赵尹
Owner SHANGHAI UNIV
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