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One-component deoximation type room-temperature vulcanized silicone rubber sealant and preparation method thereof

A room temperature vulcanization, silicone rubber technology, used in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of high industrialization threshold, high cost, poor versatility, etc., achieve high strength retention rate, improve adhesion. The effect of good bonding performance and good water resistance

Inactive Publication Date: 2015-05-13
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high purity requirements of adhesion promoter products, the industrialization threshold is high and the cost is high
In addition, the special structure of the adhesion promoter synthesized in the above patent can achieve good adhesion to specific substrates, but its versatility is poor, and it often shows poor adhesion to other substrates

Method used

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  • One-component deoximation type room-temperature vulcanized silicone rubber sealant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 20000 mPa.s and 2 parts of γ-aminopropyltrimethylsilane into the planetary stirring tank, raise the temperature to 80°C, and at -0.09 Mix for 30 minutes under ~-0.1MPa vacuum condition, and cool down to below 40°C. Add 15 parts of simethicone oil with a viscosity of 500mpa.s, 80 parts of calcium carbonate, and 10 parts of fumed white carbon black. 2 Add 10 parts of vinyl tributylketoxime silane and 0.3 parts of dibutyltin dilaurate under protection, and stir under vacuum condition of -0.09~-0.1MPa until uniform and free of bubbles.

Embodiment 2

[0033] Add 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20000 mPa.s and 3 parts of γ-aminopropyltriethoxysilane into the planetary stirring tank, raise the temperature to 60°C, and Mix for 120min under 0.09~-0.1MPa vacuum condition, cool down to below 40℃, add 15 parts of simethicone oil with a viscosity of 100mpa.s, 100 parts of calcium carbonate, 8 parts of fumed silica, in N 2Under protection, add 4 parts of methyl tributylketoxime silane, 6 parts of vinyl tributyl ketoxime silane, 0.2 part of dibutyltin dilaurate, and stir under vacuum condition of -0.09~-0.1MPa until uniform and free of bubbles.

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Abstract

The invention discloses a one-component deoximation type room-temperature vulcanized silicone rubber sealant and a preparation method thereof. The sealant is prepared through the following steps: mixing alpha,omega-dyhydroxylpolydimethylsiloxane and a silane coupling agent at a high temperature, terminating alpha,omega-dyhydroxylpolydimethylsiloxane with the silane coupling agent, and then adding dimethyl silicone oil, a de-ketoxime type cross-linking agent, a filling material and a catalyst. Compared with a traditional deoximation type sealant, the sealant has excellent adhesive properties for stainless steel, aluminium alloy, magnesium alloy, PPO, PC, PVC, PMMA, ABS, PET and the like, and can be used for adhesion and sealing in the industries of electronics, automobiles, household appliances, photovoltaic modules and the like. Besides, the sealant has excellent water resistance and especially has a high strength retention rate under high-temperature and high-humidity conditions.

Description

technical field [0001] The invention relates to a one-component deoxime type room temperature vulcanized silicone rubber, especially a one-component deoxime type room temperature vulcanized silicone rubber sealant with a wide range of bonding materials, high bonding strength, and excellent damp heat aging resistance and its preparation method. Background technique [0002] One-component room temperature vulcanized silicone rubber has been widely used in construction, electronics, automobiles, solar energy and other fields due to its excellent operability, temperature resistance and weather resistance. Condensed one-component RTV silicone rubber can be divided into deacidification type, dealcoholization type, deketoxime type, acetone removal type, and deamidation type according to the small molecules released during crosslinking. Among them, deketoxime type one-component room temperature vulcanized silicone rubber has the advantages of moderate vulcanization speed, small ket...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/04C09J11/06C09J11/04
Inventor 王瑶王德波孙应发苏丹
Owner TONSAN ADHESIVES INC
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