Dealcoholized condensed double-component room-temperature vulcanized silicone rubber and preparation method thereof

A technology of room temperature vulcanization and dealcohol condensation, which is applied in the field of potting adhesives and can solve problems such as insufficient adhesion

Active Publication Date: 2020-07-10
MIANYANG WELLS ELECTRONICS MATERIAIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this silicone rubber has insufficient adhesion to difficult-to-bond substrates, especially ABS, PBT, polycarbonate, nylon, etc.
Patent CN104781346 proposed to add polyorganos...

Method used

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  • Dealcoholized condensed double-component room-temperature vulcanized silicone rubber and preparation method thereof
  • Dealcoholized condensed double-component room-temperature vulcanized silicone rubber and preparation method thereof
  • Dealcoholized condensed double-component room-temperature vulcanized silicone rubber and preparation method thereof

Examples

Experimental program
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Effect test

Synthetic example 1

[0069] Put 1 mol of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane and 1 mol of 3-glycidyloxypropyltrimethoxysilane into the reaction kettle, and react under constant temperature reflux at 80°C for 2h. Then 2 mol of hexamethyldisilazane was added, the temperature was raised to 140° C. for reflux reaction for 12 hours, and small molecular products and unreacted hexamethyldisilazane were removed under reduced pressure to obtain novel silane compound 1#.

Synthetic example 2

[0071] Put 1 mol of 3-aminopropyltriethoxysilane and 1 mol of 3-glycidyloxypropyltrimethoxysilane into the reaction kettle, reflux at 70°C for 3 hours, and then add 1 mol of hexamethyldisilazol Azane was heated to 130°C for reflux reaction for 18 hours, and the small molecular product and unreacted hexamethyldisilazane were removed under reduced pressure to obtain the new silane compound 2#.

Synthetic example 3

[0073] Put 1 mol of 3-aminopropyltriethoxysilane and 0.5 mol of hexamethyldisilazane into the reaction kettle, reflux at 120°C for 24 hours, and then add 1 mol of 3-(methacryloyloxy ) Propyltrimethoxysilane, reflux reaction at constant temperature at 80°C for 2h, depressurize to remove small molecule products and unreacted hexamethyldisilazane, and obtain novel silane compound 3#.

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Abstract

The invention discloses dealcoholized condensed type double-component room-temperature vulcanized silicone rubber and a preparation method thereof. A silylation reaction is performed on amino alkoxy silane at a higher temperature to synthesize a novel silane compound, and the condensation type two-component room temperature curing silicone rubber prepared by using the silane compound has advantages of excellent settlement resistance, excellent leveling property, good adhesion to various substrates, especially ABS, PBT, polycarbonate, nylon and the like, and good adhesion to various substratesunder high temperature and high humidity.

Description

technical field [0001] The invention relates to the technical field of potting glue, in particular to a dealcoholization condensation type two-component room temperature vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Condensed room temperature vulcanized silicone rubber can be divided into one-component and two-component according to the product form. Among them, the two-component condensation type silicone rubber is the most common RTV silicone rubber. Its main characteristics are no heat release, no heat absorption, no expansion, small shrinkage, and deep vulcanization during vulcanization. Therefore, it is widely used in construction, automobile, electronic appliances, machinery, chemical industry, light industry and other fields. [0003] In order to meet certain performance requirements and reduce production costs, various types of fillers are usually added to the potting compound. The density of these fillers is usually hig...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/08C09J11/04
CPCC09J183/04C09J11/08C09J11/04C08L2205/035C08L2205/025C08L2203/206C08K2003/2227C08L83/04C08L83/02C08L83/08C08K9/06C08K7/26C08K3/22
Inventor 刘洪芦成赵元刚陆南平
Owner MIANYANG WELLS ELECTRONICS MATERIAIS
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