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A kind of high hardness organosilicon protective coating and its preparation method and application

A protective coating and silicone technology, applied in the direction of coating, etc., can solve the problems of low hardness, affecting the health of the operator, eye irritation, etc., and achieve excellent adhesion and heat resistance, good flow permeability, wide The effect of applying the foreground

Active Publication Date: 2011-12-21
SHENZHEN HONGTAO DECORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used (meth)acrylate reactive diluents or crosslinking agents have a strong irritating effect on the eyes, and skin contact can easily lead to allergies and affect the health of operators.
[0004] UV-curable silicone materials have excellent physical and chemical properties, fast curing speed, and do not require organic solvents. They are especially suitable for heat-sensitive applications. Application research mainly focuses on release coatings, optical fiber coatings, and conformal printed circuit boards. Coatings or moisture-proof coatings, semiconductor coatings, electronic packaging materials, lithographic printing, film materials, etc., but there are also common disadvantages such as poor strength, low hardness, and low adhesion.

Method used

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  • A kind of high hardness organosilicon protective coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of silylated β-hydroxyethyl methacrylate

[0022] Add 32.5g of β-hydroxyethyl methacrylate (HEMA) and 44.5g of methyltrimethoxysilane (MTMS) in a 250 ml three-necked flask, stir evenly, add 0.5g of stannous octoate, and stir at room temperature for 24 Hour, then underpressure distillation, remove low-boiling point small molecular compound, obtain a transparent low-viscosity liquid, it is silanized methacrylic acid-beta-hydroxyethyl ester through infrared spectrum IR identification (spectrum data: obvious absorption peak- COO-(1730cm -1 nearby), C=C(1640cm -1 nearby), Si-O (1000~1200cm -1 )).

Embodiment 2

[0023] Example 2: Preparation of silylated methacrylate-β-hydroxypropyl

[0024] Mix 28.8g of β-hydroxypropyl methacrylate (HPMA), 35.6g of methyltriethoxysilane (MTES), and 0.5g of stannous octoate, stir at room temperature for 1 hour, then raise the temperature to 70-75°C, and keep warm for 4 Hour. Then distill under reduced pressure to remove small molecular compounds with low boiling points to obtain a transparent low-viscosity liquid. The obtained infrared spectrogram data is similar to that of Example 1.

Embodiment 3

[0025] Example 3: Preparation of Oligosiloxanated-β-Hydroxypropyl Methacrylate

[0026] 56.5g of the hydrolysis condensation polymer of β-hydroxypropyl methacrylate (HPMA) and methyltrimethoxysilane (MTMS low condensation polymer, low viscosity transparent liquid) Add it to a 250 ml three-necked flask, mix well, add 0.1 g of di-n-butyltin laurate at room temperature and stir for 24 hours, then distill under reduced pressure to remove small molecular compounds with low boiling points to obtain a transparent low-viscosity liquid. It was identified as oligosiloxanated methacrylate-β-hydroxypropyl ester (infrared spectrum data: obvious absorption peak -COO-(1730cm -1 nearby), C=C(1640cm -1 nearby), Si-O (1000~1200cm -1 )).

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Abstract

The invention relates to a high-hardness organosilicon protective coating and its preparation method and application. The paint consists of 100 parts by weight of component A, 0-900 parts of component B, and 0.05-5 parts of component C; wherein component A is silanized or oligosiloxanated (meth)acrylic acid hydroxyl The composition is composed of alkyl ester and silicon functional organosilicon compound, and its weight ratio is 100-10:0-90; component B is alcohol or alcohol-water mixture; component C is photoinitiator. After the above components are mixed evenly, paint on the surface of the substrate, and after being cured by ultraviolet light, a hydrophobic anti-corrosion film with excellent adhesion is obtained. The pencil hardness of the coating film is ≥ 6H, showing good surface protection performance and durability. grinding performance. It can be used as surface hydrophobic protection treatment of stone, ceramics, concrete, wall, glass, metal, wood, plastic, cultural relic protection or surface encapsulation of electronic components.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high-hardness organosilicon protective coating and a preparation method and application thereof. Background technique [0002] Silicone materials have excellent hydrophobicity, high and low temperature resistance, weather resistance, corrosion resistance, electrical insulation, radiation resistance, flame retardancy and biocompatibility, and are widely used in aerospace, construction, electronic appliances, national defense It is an indispensable high-tech material in various sectors of the national economy in the fields of military industry, textile, petrochemical industry, medicine, food processing, and daily chemical industry. Silicone coatings are one of the rapidly developing industrial application forms, widely used as architectural waterproof and moisture-proof coatings, electrical insulation protective coatings, potting adhesive protective coatings, metal anti-corrosion coatings...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/00C09D5/00
Inventor 黄月文刘伟区罗广建
Owner SHENZHEN HONGTAO DECORATION