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Adhesion promoter for liquid silicone rubber, and preparation method and application thereof

A technology of adhesion promoter and liquid silicone rubber, which is applied in the direction of adhesives, chemical instruments and methods, non-polymer adhesive additives, etc., can solve the problems of industrial production and popularization and application limitations, complex preparation process, and increased production costs. , to achieve the effect of stable and controllable reaction process, low preparation cost and improved adhesive performance

Inactive Publication Date: 2015-11-25
浙江凌志新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly three methods: one is to treat the surface of the substrate, including pretreating the surface of the substrate with a primer, and treating the surface of the substrate with plasma. The disadvantage is that additional production processes are required, which reduces production efficiency. Increased production costs; the second is to make the addition-type liquid silicone rubber itself adhesive by changing the molecular structure of polysiloxane, but because the preparation process is relatively complicated, the realization of industrial production and popularization and application is greatly restricted; the third is By adding an adhesion promoter, adding an adhesion promoter with a tackifying group to endow the addition-type liquid silicone rubber with adhesive properties, so that the addition-type liquid silicone rubber can obtain adhesiveness after curing. This method is simple and easy to operate. Control product quality and can be used in the preparation of complex composite parts, so it has broad development prospects

Method used

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  • Adhesion promoter for liquid silicone rubber, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] After mixing the nitrogen-containing silane coupling agent represented by structural formula (I) and the epoxy silane coupling agent represented by structural formula (II) at a molar ratio of 1:1, stir for 30 minutes and slowly heat up to 40°C. After maintaining the reaction for 4 hours, the temperature is lowered, and the obtained colorless transparent liquid is the liquid silicone rubber adhesion promoter shown in the structural formula (Ⅲ). The reaction process is as follows: , where R 1 for -CH 2 CH 3 , R 5 for-OCH 2 CH 3 , R 2 for -CH 3 , R 3 for -CH, R 6 for -CH 2 CH 2 CH 3 , R 7 for -CH 2 CH 2 CH 3， R 4 for -CH 2 CH 2 -.

[0018] Adhesion test:

[0019] In 1000g viscosity is 10000mPa?s, by CH 2 =CH(CH 3 ) 2 SiO 1 / 2 Add 300g of polydimethylsiloxane with a specific surface area of ​​200m 2 / g of fumed silica, 50g of hexamethyldisilazane and 20g of water, after kneading evenly in a kneader, continue kneading at 170°C for 2 hours under reduc...

Embodiment 2

[0023] Mix the nitrogen-containing silane coupling agent shown in structural formula (I) with the epoxy silane coupling agent shown in structural formula (II) at a molar ratio of 1:1.05, stir for 40 minutes and then slowly heat up to 60°C. After maintaining the reaction for 8 hours, the temperature is lowered, and the obtained colorless transparent liquid is the liquid silicone rubber adhesion promoter shown in the structural formula (Ⅲ). The reaction process is as follows: , where R 1 for -CH 3 , R 5 for-OCH 3 , R 2 for -CH 3 , R 3 for -CH 2 CH 3 , R 6 for -CH 2 CH 3， R 7 for -CH 2 CH 2 CH 3 , R 4 for -CH 2 -.

Embodiment 3

[0025] After mixing the nitrogen-containing silane coupling agent represented by structural formula (I) and the epoxy silane coupling agent represented by structural formula (II) at a molar ratio of 1:1.02, stir for 35 minutes and slowly heat up to 45°C. After maintaining the reaction for 6 hours, the temperature is lowered, and the obtained colorless transparent liquid is the liquid silicone rubber adhesion promoter shown in the structural formula (Ⅲ). The reaction process is as follows: , where R 1 for-OCH 2 CH 3 , R 5 for-OCH 2 CH 2 CH 3 , R 2 for -CH 2 CH 2 CH 3 , R 3 for -CH 2 CH 3 , R 6 for -CH 2 CH 3 , R 7 for -CH 3 , R 4 for -CH 2 CH 2 CH 2 -.

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Abstract

The invention discloses an adhesion promoter for liquid silicone rubber. The adhesion promoter has a general formula as described in the specification, wherein R1 and R5 are selected from the group consisting of -CH3, -OCH3, -CH2CH3, -OCH2CH3, -CH2CH2CH3 or -OCH2CH2CH3; R2, R3, R6 and R7 are selected from the group consisting of -CH3, -CH2CH3 or -CH2CH2CH3; and R4 is selected from the group consisting of -CH2-, -CH2CH2-, -CH2CH2CH2- or -CH2CH2NHCH2CH2CH2-. The adhesion promoter for the liquid silicone rubber can significantly improve adhesion performance of the liquid silicone rubber to various basic materials, and has good compatibility with the liquid silicone rubber. The invention also discloses a preparation method for the adhesion promoter for the liquid silicone rubber. The method has the advantages of simple process steps, stable and controllable reaction process, low production cost and facilitation to realizing industrial production.

Description

technical field [0001] The invention relates to the technical field of silicone material bonding, in particular to a liquid silicone rubber adhesion promoter and its preparation method and application. Background technique [0002] In today's world, with the rapid development of science and technology, human beings have entered the age of electronic information. With the continuous advancement of electronic technology, electronic components and logic circuits are increasingly integrated, miniaturized and modularized, and the working environment is more harsh, which puts forward higher requirements for the stability of electronic devices. Packaging is one of the important processes of electronic components. It can strengthen the integrity of electronic components, prevent moisture, dust and harmful gases from corroding electronic components, improve resistance to external shock and vibration, stabilize component parameters, and It is beneficial to the miniaturization and wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/06C07F7/18
Inventor 陈世龙程大海张春晖张宝华汪金花王松涛
Owner 浙江凌志新材料有限公司
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