Silicone rubber primer coating and preparation method thereof

A primer and silicone rubber technology, used in adhesives and other directions, can solve the problems of weak film-forming properties of primers, and achieve the effects of good adhesion, cheap and easy-to-obtain raw materials, and no attenuation of adhesion performance.

Inactive Publication Date: 2019-02-12
SHENZHEN KANGLIBANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the patent application of the Japanese patent European version publication number EP0051363A1, a preparation method of a primer is described, which is mainly used for bonding high-temperature curing silicone rubber to metal and plastics. The primer contains polyalkyl silicate , vinyl tri-tert-butyl peroxide silane and organic solvents, but the primer has weak film-forming properties and is not suitable for LSR
[0007] Therefore, there is a need for a silicone rubber primer with good adhesion and water boiling resistance to solve the adhesive problems of the above-mentioned silicone rubber and polycarbonate and other substrates.

Method used

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  • Silicone rubber primer coating and preparation method thereof

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preparation example Construction

[0096] The present invention also provides a kind of preparation method of silicone rubber primer, comprising the following steps:

[0097] Step 1: Accurately weigh various raw materials according to the formula, and store them in clean and sterilized containers;

[0098] Step 2: Add allyltrimethoxysilane and vinyltrimethoxysilane in the formula amount into a three-neck round bottom flask, heat in a water bath, and start stirring;

[0099] Step 3: Heat up to 50°C, slowly add the formulated amount of solvent, deionized water, and catalyst into the round bottom flask for 2 hours, then raise the temperature to 60°C, react for 1 hour, stop heating, and cool to room temperature .

[0100] In the present invention, in the above-mentioned preparation process, the hydrolysis reaction equation of the pre-hydrolysis of allyltrimethoxysilane and vinyltrimethoxysilane is as follows:

[0101] h 2 C=CH-CH 2 -Si(OCH 3 ) 3 +H2O→H 2 C=CH-CH 2 -SiOH(OCH 3 ) 2

[0102] h 2 C=CH-CH 2...

Embodiment 1

[0115] Step 1: Accurately weigh various raw materials according to the formula, and store them in clean and sterilized containers;

[0116] Step 2: Add 50 parts of allyltrimethoxysilane and 20 parts of vinyltrimethoxysilane into a three-neck round bottom flask, heat in a water bath, and start stirring;

[0117] Step 3: Heat up to 50°C, slowly add 100 parts of isopropanol, 5 parts of deionized water, and 0.5 parts of hydrochloric acid into the round bottom flask dropwise for 2 hours, then raise the temperature to 60°C, react for 1 hour, and stop Heat and cool to room temperature.

Embodiment 2

[0119] Step 1: Accurately weigh various raw materials according to the formula, and store them in clean and sterilized containers;

[0120] Step 2: Add 100 parts of allyltrimethoxysilane and 20 parts of vinyltrimethoxysilane into a three-neck round bottom flask, heat in a water bath, and start stirring;

[0121] Step 3: Heat up to 50°C, slowly drop 100 parts of isopropanol, 6 parts of deionized water, and 1.0 part of hydrochloric acid into the round bottom flask for 2 hours, then raise the temperature to 60°C, react for 1 hour, and stop Heat and cool to room temperature.

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Abstract

The invention discloses a silicone rubber primer coating and a preparation method thereof. The silicone rubber primer coating is prepared from the following ingredients in parts by mass: 50 to 100 parts of allyl trimethoxysilane, 10 to 20 parts of vinyl trimethoxysilane, 100 to 200 parts of a solvent, 5 to 10 parts of deionized water and 0.5 to 2 parts of a catalyst. The preparation method comprises the following steps: adding the allyl trimethoxysilane and the vinyl trimethoxysilane into a three-mouth round-bottom flask, heating in a water bath, starting stirring, heating and warming to 50 DEG C, slowly and dropwise adding the solvent, the deionized water and the catalyst into the round-bottom flask, wherein the dropwise adding time is 2 h, then warming to 60 DEG C to react for 1 h, stopping heating and cooling to room temperature. By means of the formula ingredients and the preparation method, the prepared primer coating can make silicone rubber achieve a good bonding effect; furthermore, the raw materials are cheap and easy to obtain, and the industrial production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of application of silane coupling agents, in particular to a silicone rubber primer and a preparation method thereof. Background technique [0002] Addition-type liquid silicone rubber (LSR) has excellent temperature resistance (stable use at temperatures ranging from -60°C to 200°C), weather resistance, electrical insulation and physiological inertness, and is popular in the market, but due to its Its own characteristics generally cannot be used directly, and it needs to be used in combination with other substrates to maximize its use value. Due to the low surface energy of LSR, it has poor adhesion to other materials, especially the adhesion between silicone rubber and polycarbonate. Therefore, when compounding other materials, it is necessary to pre-treat the substrate with a primer to achieve strong adhesion. Combined effect. [0003] However, the existing silicone rubber primer has limitations in adhe...

Claims

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Application Information

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IPC IPC(8): C09J183/07
CPCC09J183/04
Inventor 廖婉淋
Owner SHENZHEN KANGLIBANG TECH
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