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Low cost room temperature silicon sulfide rubber composition

A technology of silicone rubber composition and room temperature vulcanization, which is applied in the field of room temperature vulcanization silicone rubber composition, and can solve the problem of high cost

Inactive Publication Date: 2006-02-15
GUANGZHOU GBS HIGH TECH & IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost deacetic acid type single-component room temperature vulcanized silicone rubber composition

Method used

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  • Low cost room temperature silicon sulfide rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 50 Pa·s, 6 parts of methyltriacetoxysilane, and 10 parts with a specific surface area of ​​150m 2 / g of hydrophilic fumed silica, 20 parts of 0.35Pa s methyl silicone oil and 20 parts of industrial white oil with a viscosity of 0.004Pa s, and 0.02 parts of dibutyltin dilaurate were successively added to the high-speed mixer in vacuum After stirring and mixing for 60 minutes, release the vacuum with nitrogen and put it into a sealed packaging container. The prepared sample was made into an H-type test piece according to GB / T13477.8 "Determination of Tensile Adhesion", and the tensile bond strength was measured to be 0.70MPa, the maximum elongation rate was 186%, and the glue was cured for one month No yellowing afterwards. The storage period is tested according to the empirical method. The packaged samples are placed at 70°C and 50% humidity for two weeks. After being placed at room temperatur...

Embodiment 2

[0023] Stir 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 30 Pa·s, 5 parts of methyltriacetoxysilane, and 1 part of ethyltriacetoxysilane in a high-speed mixer under vacuum for 20 minutes, and then sequentially add The specific surface area of ​​12 parts that has been stirred evenly is 200m 2 / g of hydrophilic fumed silica and 60 parts of industrial white oil paste with a viscosity of 0.004 Pa s, 0.02 parts of dibutyltin dilaurate and vacuum stirring for 30 minutes, then use nitrogen to remove the vacuum and put it into a sealed container inside the packaging container. The prepared samples were made into H-type test pieces according to GB / T13477.8 "Determination of Tensile Adhesion", and the tensile bond strength was measured to be 0.66MPa, the maximum elongation of force was 175%, and the storage period was based on empirical methods For the test, the packaged sample was placed at 70°C and 50% humidity for two weeks, and it cured normally after b...

Embodiment 3

[0025] Stir 100 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 30 Pa·s, 5 parts of methyltriacetoxysilane, and 1 part of ethyltriacetoxysilane in a high-speed mixer under vacuum for 20 minutes, and then sequentially add The specific surface area of ​​the 3 parts that have been stirred evenly is 150m 2 / g of hydrophilic fumed silica, 20 parts specific surface area is 150m 2 / g precipitation method and 50 parts of industrial white oil paste with a viscosity of 0.004Pa·s, 0.02 parts of dibutyltin dilaurate were stirred in vacuum for 30 minutes, and the vacuum was released with nitrogen and packed into a sealed packaging container. The prepared samples were made into H-type test pieces according to GB / T13477.8 "Determination of Tensile Adhesion", and the tensile bond strength was measured to be 0.66MPa, the maximum elongation rate was 181%, and the glue was cured for one month No yellowing afterwards. The storage period is tested according to the empirical...

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Abstract

Disclosed is a low cost room temperature vulcanized silicone rubber composition, wherein the constituents include (by weight portions): oligomeric polydimethylsiloxanol 80-120, cross linking agent 2-15, catalyst 0.005-0.1, filling material 3-100, addition agent 10-100.

Description

technical field [0001] The invention relates to a room temperature vulcanized silicone rubber composition. Background technique [0002] Room temperature vulcanization (RTV) silicone rubber is a kind of silicone elastomer with excellent weather aging resistance. The most notable feature of this rubber is that it can be cured in situ without heating or pressure at room temperature, and it is extremely convenient to use. Therefore, it is widely used in the fields of adhesives, sealants, protective coatings, potting and molding materials. Room temperature vulcanized silicone rubber can be divided into one-component and two-component room temperature vulcanized silicone rubber according to its packaging method. The vulcanization reaction of one-component RTV silicone rubber is initiated by absorbing moisture in the air. The crosslinking agent is selected from silanes containing acetoxy, alkoxy, oxime, amine, amide, and ketone groups. When the alkoxy group absorbs moisture in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/14C08J3/24C08K5/57
Inventor 王跃林吴利民
Owner GUANGZHOU GBS HIGH TECH & IND
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