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Low-viscosity high-transparency self-adhesive organic silicone pouring sealant and preparation method thereof

A silicone potting glue and self-adhesive technology, applied in the field of potting glue, can solve the problems of poor adhesion of the potting glue, increase the production process, high viscosity, achieve good bonding performance and mechanical properties, easy industrial production, Simple preparation method

Inactive Publication Date: 2016-05-18
FOSHAN XINXIANGXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102382618A discloses a two-component high-strength transparent room temperature curing silicone potting compound, wherein the silicone resin is dissolved with toluene, which increases the production process and reduces production efficiency. The organic solvent toluene can also cause certain effects on the human body damage, pollute the environment, and this potting adhesive has poor adhesion, high viscosity, and poor fluidity
Chinese patent CN102408869A reports a halogen-free, heat-conducting, flame-retardant, addition-type silicone potting compound for electronic appliances, which uses a nitrogen-containing silane compound as an adhesion promoter, which has the disadvantage of easily poisoning the Castel catalyst, and also adds a large amount of Inorganic fillers, poor transparency of silicone potting adhesive

Method used

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  • Low-viscosity high-transparency self-adhesive organic silicone pouring sealant and preparation method thereof
  • Low-viscosity high-transparency self-adhesive organic silicone pouring sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 100 parts by mass of vinyl-terminated polydimethylsiloxane with a viscosity of 1000 mPa·s, 20 parts by mass of vinyl-based MQ silicone resin (vinyl content of 0.5%, M / Q value of 0.8), and 4.5 parts by mass of a viscosity of 50mPa·s polymethylhydrogensiloxane, 1.5 parts by mass of vinyltrimethoxysilane, 0.02 parts by mass of 1-ethynyl-1-cyclohexanol and 0.3 parts by mass of a platinum catalyst with a content of 4000ppm were added to the high-speed disperser, Stir for 1 hour to obtain a low-viscosity, highly transparent, self-adhesive silicone potting compound. Its performance test shows that the viscosity is 1500mPa·s, the light transmittance is 97%, and the bond tensile shear strength (abbreviated as shear strength, the same below) is 1.02MPa. The detailed results are shown in Table 1.

Embodiment 2

[0022] 100 parts by mass of vinyl-terminated polydimethylsiloxane with a viscosity of 800 mPa·s, 30 parts by mass of vinyl MQ silicone resin (vinyl content is 1%, M / Q value is 1), 5 parts by mass with a viscosity of 30mPa·s polymethylhydrogensiloxane, 2 parts by mass of vinyltrimethoxysilane, 0.01 part by mass of 1-ethynyl-1-cyclohexanol and 0.4 parts by mass of a platinum catalyst with a platinum content of 2500ppm were added to the high-speed disperser, Stir for 2 hours to obtain a low-viscosity, highly transparent, self-adhesive silicone potting compound. Its performance test shows that the viscosity is 1800mPa·s, the light transmittance is 97%, and the shear strength is 1.15MPa. The detailed results are shown in Table 1.

Embodiment 3

[0024] 100 parts by mass of vinyl-terminated polydimethylsiloxane with a viscosity of 2000mPa·s, 15 parts by mass of vinyl-based MQ silicone resin (vinyl content of 6.5%, M / Q value of 1.2), and 7.5 parts by mass of a viscosity of 150mPa·s polymethylhydrogensiloxane, 1.5 parts by mass of 3-methacryloxypropyltrimethoxysilane, 0.02 parts by mass of 1-ethynyl-1-cyclohexanol and 0.2 parts by mass of platinum with a content of 5000ppm Add the Ster catalyst into a high-speed disperser and stir for 3 hours to obtain a low-viscosity, high-transparency, self-adhesive silicone potting compound. Its performance test shows that the viscosity is 2300mPa·s, the light transmittance is 98%, and the shear strength is 1.03MPa. The detailed results are shown in Table 1.

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Abstract

The invention discloses a low-viscosity high-transparency self-adhesive organic silicone pouring sealant and a preparation method thereof. The preparation method includes the steps of feeding polydimethylsiloxane with terminal vinyl groups, vinyl MQ silicone resin, polymethylhydrosiloxane, an adhesion promoter, 1-acetenyl-1-cyclohexanol and a Karstedt catalyst into a high-speed dispersing machine, and mixing the components uniformly to prepare the low-viscosity high-transparency self-adhesive organic silicone pouring sealant. The pouring sealant is higher than 96% in light transmittance, is good in flowability, is easy to use, can be cured at normal temperature or under heating conditions, has good adhesion and mechanical performance, and can be widely used in the fields of optical devices, LED chip potting and the like with high requirements on transparency and adhesion strength.

Description

technical field [0001] The invention relates to the technical field of potting glue, in particular to a low-viscosity, highly transparent, self-adhesive silicone potting glue and a preparation method thereof. Background technique [0002] In the electronics industry, in order to improve the stability of electronic components, potting is often required. Potting is one of the important processes of electronic components. It can effectively prevent the intrusion of moisture, dust and harmful gases to electronic components, slow down vibration, prevent external damage, stabilize component parameters, and reduce the adverse effects of the external environment. [0003] With the development of electronic devices in the direction of light weight, integration and high performance, higher requirements are put forward for potting materials, not only must have good electrical insulation and chemical stability, weather resistance, waterproof, low viscosity, but also To have better bond...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/05C09J11/06C09K3/10
Inventor 潘科学
Owner FOSHAN XINXIANGXING CHEM
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