Preparation method of ultraviolet-resistant and high-temperature-resistant methyl silicone resin

A technology of methyl silicone resin and high temperature resistance, which is applied in the field of preparation of modified methyl silicone resin, can solve the problems of high cost, complicated preparation method, poor temperature resistance and ultraviolet resistance, etc., and achieve good heat resistance, The synthesis process is simple and easy, and the effect of commercial purchase is low

Active Publication Date: 2013-08-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a UV-resistant and high-temperature resistant methyl silicone resin in order to solve the problems of poor temperature resistance and UV resistance as well as complex preparation methods and high costs of the existing methyl silicone resin

Method used

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  • Preparation method of ultraviolet-resistant and high-temperature-resistant methyl silicone resin

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specific Embodiment approach 1

[0010] Specific implementation mode 1: The preparation method of the anti-ultraviolet and high-temperature resistant methyl silicone resin in this embodiment is implemented according to the following steps:

[0011] 1. Disperse 1-1.2g of tetraethyl orthosilicate in 45-50g of absolute ethanol, stir magnetically for 40-50min to obtain the ethanol dispersion of tetraethyl orthosilicate, and then take 1-1.5g of deionized water , 7.0-7.5g of absolute ethanol and 1.5-2.3g of ammonia water were magnetically stirred and mixed for 15-20min, then added dropwise to the ethanol dispersion of tetraethyl orthosilicate, stirred and reacted at 400-600r / min for 5-6h, and obtained Silica ethanol solution;

[0012] 2. Take 1.5g~1.7g of tetrabutyl titanate and disperse it in 9g~10g of absolute ethanol, stir magnetically for 30min~40min to obtain the ethanol dispersion of tetrabutyl titanate, then take 1g~1.5g of deionized Water, 5g~6g of absolute ethanol and 1g~1.2g of hydrochloric acid with a m...

specific Embodiment approach 2

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that step 1 takes 1-1.5g of deionized water, 7.0-7.5g of absolute ethanol and 1.5-2.3g of ammonia water and mixes them for 15-20min with magnetic force Add it dropwise to the ethanol dispersion of tetraethyl orthosilicate at a rate of 12-15 s / d. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that step 1 disperses 1 g of tetraethyl orthosilicate in 50 g of absolute ethanol. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method of ultraviolet-resistant and high-temperature-resistant methyl silicone resin, relates to the preparation method of modified methyl silicone resin, and is used for solving the problems that the existing methyl silicone resin is poor in high temperature and ultraviolet resistance, complicated in preparation method and high in cost. The preparation method comprises the following steps of:1, dispersing ethyl orthosilicate in anhydrous ethanol and then adding a mixing solution of deionized water, the anhydrous ethanol and ammonia, thereby obtaining a silica ethanol solution; 2, dispersing tetrabutyl titanate in the anhydrous ethanol and then adding the mixing solution of the deionized water, the anhydrous ethanol and hydrochloric acid, thereby obtaining a titania ethanol solution; 3, dispersing methyl triethoxysilane and diethoxydimethylsilane in the anhydrous ethanol, thereby preparing a methyl silicone resin prepolymer; and 4, regulating the pH values of the solutions obtained in the steps 1 and 2 to be 7 and performing a refluxing operation after adding the prepolymer, thereby obtaining the methyl silicone resin. The method is conventional in raw material preparation as well as simple and easy to implement. The thermal weight loss rate of the modified methyl silicone resin at the temperature of 300 DEG C is 0.6, so that the modified methyl silicone resin is good in ultraviolet resistance.

Description

technical field [0001] The invention relates to a preparation method of modified methyl silicone resin. Background technique [0002] Some ceramics, metals and other materials cannot meet the requirements of harsh environments such as strong corrosion, high radiation, and high temperature. Therefore, coating the surface of such materials with a protective coating is an effective measure to solve such problems. Methyl silicone resin is a type of coating film-forming material that has been studied and applied more at present, and has excellent properties such as corrosion resistance, electrical insulation and water resistance. However, the existing methyl silicone resin coating has poor high temperature resistance and poor UV resistance, and is prone to aging under sunlight. It is necessary to further improve its high temperature resistance and UV resistance by modifying the methyl silicone resin. At present, the modification method of methyl silicone resin is mainly to intro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/18C08K3/36C08K3/22C09D183/06
Inventor 姜波王慧莲陈路宇黄玉东刘丽祝长城
Owner HARBIN INST OF TECH
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