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 sep

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

Example Embodiment

[0054] Example 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, and add 9g of silica sol, 0.4 g nitric acid and 58.5 g of water are mixed uniformly, placed in a dropping funnel, dripped in 0.5-1 hour, stirred for 6-8 hours, and aged for 24 hours to obtain an organic-inorganic hybrid resin.

Example Embodiment

[0056] Example 2:

[0057] 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, add 18g of silica sol, 0.41 g nitric acid and 52.2 g of water are mixed uniformly, placed in a dropping funnel, dripped 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 coating for bottom coating

Example Embodiment

[0059] Example 3:

[0060] Mix 97.5 g of resin prepared in Example 1, 11.2 g of urethane acrylate, 8.4 g of epoxy acrylate, 8.4 g of trimethylolpropane triacrylate, 1.12 g of photoinitiator Darocur 1173, and 0.38 g of leveling agent. Stir evenly to obtain an organic-inorganic hybrid coating.

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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

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Claims

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Application Information

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Owner SHANGHAI UNIV
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