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Preparation method of organic silica gel adhesive

A silicone adhesive, an organic technology, applied in the field of preparation of silicone adhesives, can solve the problems of not meeting the needs of use, not being able to provide sufficient adhesive force, etc., and achieve good bonding performance

Inactive Publication Date: 2019-04-16
杨鹏熙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most cases, the molecular interaction between the polydimethylsiloxane of silicone rubber and the polar surface cannot provide sufficient adhesive force, which is far from meeting the needs of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of silicone adhesive of the present invention, comprises the steps:

[0018] (1) Add the mixed solution of ethanol and deionized water into flask 1, and start stirring;

[0019] (2) Add nitric acid dropwise to pH 4, slowly drop vinyltriethoxysilane, and control the dropping speed; after the solution is clarified, raise the temperature to 80°C, add potassium hydroxide solution dropwise to pH 9, and continue the reaction for 10 minutes ;

[0020] (3) Neutralize with acetic acid, then distill off ethanol and unreacted water at a temperature of 110°C and a pressure of -0.1MPa, add anhydrous calcium carbonate to dry, filter and collect the filtrate to obtain a hydrolyzed polycondensate;

[0021] (4) Add the hydrolyzed polycondensate, vinyltri-tert-butyl silicon peroxide, isopropyl titanate and ethanol in sequence to flask 2, and mix well to obtain the silicone adhesive.

[0022] In the preparation method of the silicone adhesive of the present invent...

Embodiment 2

[0028] The preparation method of silicone adhesive of the present invention, comprises the steps:

[0029] (1) Add the mixed solution of ethanol and deionized water into flask 1, and start stirring;

[0030] (2) Add nitric acid dropwise to pH 4, slowly drop vinyltriethoxysilane, and control the dropping speed; after the solution is clarified, raise the temperature to 85°C, add potassium hydroxide solution dropwise to pH 9, and continue the reaction for 13 minutes ;

[0031] (3) Neutralize with acetic acid, then distill off ethanol and unreacted water at a temperature of 116°C and a pressure of -0.1MPa, add anhydrous calcium carbonate to dry, filter and collect the filtrate to obtain a hydrolyzed polycondensate;

[0032] (4) Add the hydrolyzed polycondensate, vinyltri-tert-butyl silicon peroxide, isopropyl titanate and ethanol in sequence to flask 2, and mix well to obtain the silicone adhesive.

[0033] In the preparation method of the silicone adhesive of the present invent...

Embodiment 3

[0039] The preparation method of silicone adhesive of the present invention, comprises the steps:

[0040] (1) Add the mixed solution of ethanol and deionized water into flask 1, and start stirring;

[0041] (2) Add nitric acid dropwise to pH 4, slowly drop vinyltriethoxysilane, and control the dropping speed; after the solution is clarified, heat up to 90°C, add potassium hydroxide solution dropwise to pH 9, and continue the reaction for 15 minutes ;

[0042] (3) Neutralize with acetic acid, then distill off ethanol and unreacted water at a temperature of 120°C and a pressure of -0.1MPa, add anhydrous calcium carbonate to dry, filter and collect the filtrate to obtain a hydrolyzed polycondensate;

[0043] (4) Add the hydrolyzed polycondensate, vinyltri-tert-butyl silicon peroxide, isopropyl titanate and ethanol in sequence to flask 2, and mix well to obtain the silicone adhesive.

[0044] In the preparation method of the silicone adhesive of the present invention, the first...

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PUM

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Abstract

A preparation method of an organic silica gel adhesive is characterized in that a mixed solution of ethanol and deionized water is added to a flask I and stirring is started; nitric acid is added dropwise, vinyl triethoxysilane is slowly dropped in, and the dropping speed is controlled; after the solution is clarified, heating is executed, a potassium hydroxide solution is added dropwise, and thereaction continues; neutralization is executed with acetic acid, the ethanol and unreacted water are removed through distillation, drying is executed by adding anhydrous calcium carbonate, suction filtration is executed, and filtrate is collected to obtain a hydrolyzed polycondensate; the hydrolyzed polycondensate, vinyl tri-tert-butyl silicon peroxide, isopropyl titanate and ethanol are sequentially added into a flask II and are evenly mixed to obtain the organic silica gel adhesive. By improving the prior art, the silane coupling agent hydrolyzed polycondensate is used as a main body to prepare the organic silica gel adhesive for compounding silicone rubber and metal and fiber reinforced materials, and the bonding performance is good.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing an organic silica gel adhesive. Background technique [0002] Silicone rubber has the advantages of excellent high and low temperature resistance, good electrical insulation, oxygen aging resistance, light aging resistance, mildew resistance and chemical stability, so it is widely used in aviation, automobile, wire and cable and medical fields. At present, the laminated composite products of silicone rubber and reinforcing materials such as fibers and metals are developing rapidly at home and abroad. Because fiber reinforcement can endow silicone rubber products with higher strength and limit their free deformation, and endow the products with higher mechanical properties and use value, most silicone rubber products are made of composite reinforcing materials. However, the polarity, reactivity and surface energy of the main chain of silicone rubber mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J11/04C08G77/20
CPCC09J183/04C08G77/20C08K2003/265C09J11/04C08K3/26
Inventor 杨鹏熙
Owner 杨鹏熙