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Silicon sulfide rubber and preparation method thereof

A technology of vulcanized silicone rubber and catalyst, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of reducing the initial bonding strength, and achieve good bonding performance, excellent electrical performance and low cost. Effect

Inactive Publication Date: 2012-07-11
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Under normal circumstances, if the glue is stored for 3 months, the surface drying time will be doubled, and the initial bonding strength will be reduced by half accordingly.

Method used

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  • Silicon sulfide rubber and preparation method thereof
  • Silicon sulfide rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In a 5L planetary reactor, add 5000mPa.s vinyl-terminated polydimethylsiloxane 1000g, calcium carbonate 1000g, temperature 120°C, disperser rotation speed 500rpm, vacuum degree -0.098Mpa, continuous vacuum dehydration for 3h. Cool to 40°C, add 30g of trimethoxysilane and 5g of platinum catalyst and mix for 30min. Add 200g of 100mPa.s simethicone oil, 60g of white carbon black, 50g of methyltrimethoxysilane, 10g of stabilizer, 10g of γ-aminopropyltriethoxysilane, and 1g of dibutyltin dilaurate. Under the condition of vacuum degree -0.098Mpa, the speed of the dispersing disc is 400rpm, mix for 1 hour, let it air naturally at room temperature, and pack it.

Embodiment 2

[0048] In a 5L planetary reactor, add 20000mPa.s vinyl-terminated polydimethylsiloxane 1000g, calcium carbonate 2000g, temperature 150°C, disperser rotation speed 1000rpm, vacuum degree -0.1Mpa, and continuous vacuum dehydration for 4h. Cool to 50°C, add 50g of triethoxysilane and 10g of platinum catalyst and mix for 30min. Add 500g of 1000mPa.s simethicone oil, 100g of white carbon black, 100g of methyltrimethoxysilane, 20g of stabilizer, 20g of γ-aminopropyltriethoxysilane, and 5g of dibutyltin dilaurate. Under the condition of vacuum degree -0.1Mpa, the speed of the dispersing disc is 600rpm, mix for 2 hours, let it air naturally at room temperature, and pack it.

Embodiment 3

[0050] In a 5L planetary reactor, add 1000g of 10000mPa.s vinyl-terminated polydimethylsiloxane, 1500g of silicon micropowder, temperature 135°C, disperser rotation speed 750rpm, vacuum degree -0.099Mpa, continuous vacuum dehydration for 3.5h. Cool to 45°C, add 40g of trimethoxysilane and 7.5g of platinum catalyst and mix for 30min. Add 350g of 500mPa.s dimethyl silicone oil, 80g of white carbon black, 75g of methyltriethoxysilane, 15g of stabilizer, 15g of γ-aminopropyltriethoxysilane, and 3g of dibutyltin diacetate. Under the condition of vacuum degree -0.099Mpa, the speed of the dispersion disc is 500rpm, mix for 1.5 hours, let it air naturally at room temperature, and pack it.

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Abstract

The invention relates to silicon sulfide rubber and a preparation method thereof. The silicon sulfide rubber comprises the following raw materials in part by weight: 100 parts of vinyl-terminated polydimethylsiloxane, 100 to 200 parts of filler, 3 to 5 parts of end-capping agent, 0.5 to 1 part of platinum catalyst, 20 to 50 parts of plasticizer, 6 to 10 parts of thixotropic agent, 5 to 10 parts of cross-linking agent, 1 to 2 parts of stabilizing agent, 1 to 2 parts of tackifier and 0.1 to 0.5 part of organic tin catalyst. The preparation method comprises the following steps of: 1) mixing the vinyl-terminated polydimethylsiloxane and the filler, dispersing and cooling to obtain a mixture A; and 2) adding the capping agent and the platinum catalyst into the mixture A, mixing, adding the plasticizer, the thixotropic agent, the cross-linking agent, the stabilizing agent, the tackifier and the organic tin catalyst sequentially, dispersing, and airing naturally at room temperature to obtain the silicon sulfide rubber. The silicon sulfide rubber is low in cost and high in storage stability and has an excellent electric property and high bonding performance.

Description

technical field [0001] The invention relates to a vulcanized silicone rubber and a preparation method thereof, in particular to a one-component dealcoholized room temperature vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Room temperature vulcanized silicone rubber is easy to use and can be cured at room temperature without heating. It has excellent high and low temperature resistance, UV aging resistance and good electrical insulation. It has been widely used in industrial, civil, military and electronic fields. [0003] At present, the common one-component RTV silicone rubber on the market mainly includes four types: deacidification type, deoxime type, dealcoholization type and acetone removal type. [0004] One-component deacidified room temperature vulcanized silicone rubber is limited in its field of application due to its corrosion to materials. [0005] One-component deoxime RTV silicone rubber is a neutral RTV silicone r...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/04C09J11/04C09J11/06
Inventor 白纯勇王建斌解海华
Owner YANTAI DARBOND TECH
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