Organic silicon resin conformal coating capable of being cured at room temperature and preparation method thereof

A room temperature curing, silicone technology, applied in the direction of fireproof coatings, coatings, etc., can solve the problems of large steric hindrance, affecting product performance, and large steric hindrance of phenyl silicone resin, to achieve increased toughness, simple preparation process, The effect of easy response

Active Publication Date: 2020-07-28
重庆中弗聚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technical route has the following defects: due to the existence of the benzene ring in the phenyl silicone resin, the steric hindrance of the phenyl silicone resin becomes larger, which leads to harsher reaction conditions when the phenyl silicone resin is polymerized in a linear polymer , For example, reaction conditions in CN102304323A need nitrogen (inert gas), react 5-7 hours (reaction time is long)

Method used

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  • Organic silicon resin conformal coating capable of being cured at room temperature and preparation method thereof
  • Organic silicon resin conformal coating capable of being cured at room temperature and preparation method thereof
  • Organic silicon resin conformal coating capable of being cured at room temperature and preparation method thereof

Examples

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[0038] Example 1

[0039] Preparation of hydroxymethyl silicone resin: 80g ethyl orthosilicate, 20g methyltrimethoxysilane and 140g toluene mixture were put into the reaction kettle, 2g concentrated HCl+20g distilled water mixture was added dropwise at room temperature, the addition was completed, and the temperature was raised to 60 Reflux the reaction at ℃ for 5 hours, heat up to 70-80 ℃ to distill the methanol and water produced by the reaction, then heat up to 110 ℃ and reflux for 8 hours, then cool to 60 ℃ and add 3g of hexamethyldisilazane to neutralize HCl, Then the temperature is raised to 110°C and concentrated to a resin liquid with a solid content of 50%, and the temperature is lowered for use;

[0040] The structure of the prepared hydroxymethyl silicone resin is as follows:

[0041]

[0042] Preparation of alkoxy-terminated phenyl silicone oil: 100g octamethylcyclotetrasiloxane and 40g octaphenylcyclotetrasiloxane, 2g 1,3-dimethoxy-1,1,3,3-tetramethyl Disiloxane, 2g al...

Example Embodiment

[0049] Example 2

[0050] Prepare hydroxymethyl silicone resin: put 70g ethyl orthosilicate, 10g dimethyldimethoxysilane and 120g xylene mixture into the reaction kettle, add 1g concentrated HCl+8g distilled water mixture dropwise at room temperature, and the addition is complete , The temperature is raised to 60°C and the reaction is refluxed for 5 hours, the temperature is raised to 70-80°C to evaporate the methanol and water produced by the reaction, and then the temperature is raised to 110°C, and the reaction is refluxed for 8 hours, then the temperature is reduced to 60°C and 3g of hexamethyldisilazane is added Neutralize the HCl, and then increase the temperature to 110°C and concentrate it to a resin liquid with a solid content of 50%. Cool down and set aside;

[0051] Preparation of alkoxy-terminated phenyl silicone oil: 140g octamethylcyclotetrasiloxane and 40g octaphenylcyclotetrasiloxane, 6g 1,3-dimethoxy-1,1,3,3-tetramethyl Disiloxane, 1.5g alkali gum, mix uniformly, ...

Example Embodiment

[0053] Example 3

[0054] Preparation of hydroxymethyl silicone resin: Put a mixture of 100g ethyl orthosilicate and 150g toluene into the reaction kettle, add 3g concentrated HCl+15g distilled water mixture dropwise at room temperature, after completion of the dropwise addition, heat up to 60°C for reflux reaction for 5 hours, and heat up to The methanol and water produced by the reaction were distilled off at 70-80°C, then the temperature was raised to 110°C and refluxed for 8 hours. After cooling to 60°C, 3g of hexamethyldisilazane was added to neutralize the HCl, and then the temperature was raised to 110°C and concentrated to solid. Resin liquid with a content of 50%, cool down for use;

[0055] Preparation of alkoxy-terminated phenyl silicone oil: 140g octamethylcyclotetrasiloxane and 80g octaphenylcyclotetrasiloxane, 2g1,3-dimethoxy-1,1,3,3-tetramethyl Disiloxane, 4g alkali gum mixed uniformly, then reacted at 150°C for 5 hours, heated to 180°C and reacted for 30 minutes, a...

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Abstract

The invention discloses an organic silicon resin conformal coating capable of being cured at room temperature and a preparation method thereof. The organic silicon resin conformal coating capable of being cured at room temperature is mainly prepared from the following raw materials: hydroxymethyl organic silicon resin, alkoxy-terminated phenyl silicone oil, a cross-linking agent and a catalyst. The organic silicon resin is modified in the invention to obtain the organic silicon resin conformal coating introduced with a bifunctional chain link, so the toughness of the silicon resin is improved;and the organic silicon resin conformal coating contains the tin catalyst, so the curing of the coating at room temperature is realized.

Description

technical field [0001] The invention relates to the field of silicone resin materials, in particular to a room-temperature-curable silicone resin conformal coating and a preparation method thereof. Background technique [0002] Silicone material is a polysiloxane composed of a unique structure of silicon-oxygen bond (-Si-O-Si-), which has the properties of both inorganic and organic materials, and has basic properties such as good weather resistance, high and low temperature resistance, and has Excellent properties such as electrical insulation, oxidation resistance stability, water repellency, corrosion resistance, non-toxic, tasteless and physiological inertness. It is not only used in special industries such as aerospace and military, but also widely used in various industries such as organic synthesis, building materials, lighting, daily chemicals, household appliances, textile finishing, automobiles, machinery manufacturing, papermaking and pharmaceutical engineering, e...

Claims

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Application Information

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IPC IPC(8): C09D183/10C09D5/18C08G77/44
CPCC08G77/44C08G77/80C09D5/18C09D183/10
Inventor 曲艳斌吴念钟成
Owner 重庆中弗聚新材料科技有限公司
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