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Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof

A sealant and silicone rubber technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of slow curing speed and no anti-yellowing performance, and achieve fast curing speed and excellent anti-yellowing performance. Effect

Inactive Publication Date: 2013-10-23
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the RTV silicone rubber sealant disclosed in the prior art does not involve its anti-yellowing performance, and the curing speed is slow

Method used

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  • Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof
  • Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof
  • Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A transparent dealcoholized one-component RTV silicone rubber sealant, the RTV silicone rubber sealant comprises the following raw materials in parts by mass:

[0038]

[0039] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 1500cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 50cps Silicone oil, the reinforcing filler is hydrophilic fumed silica, the hydroxyl scavenger is hexamethyldisilazane, the coupling agent is γ-aminopropyltriethoxysilane, and the cross-linked The coupling agent is ethyl orthosilicate, and the catalyst is diethylaminomethyltriethoxysilane.

[0040] The preparation method of the above-mentioned transparent dealcoholized one-component RTV silicone rubber sealant is as follows:

[0041] (1) Vacuum stir the α,ω-dihydroxy polydimethylsiloxane, simethicone oil, reinforcing filler and hydroxyl scavenger in the power mixer;

[0042] (2) Add the coupling ...

Embodiment 2

[0045] A transparent dealcoholized one-component RTV silicone rubber sealant, the RTV silicone rubber sealant comprises the following raw materials in parts by mass:

[0046]

[0047] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 50000cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 500cps Silicone oil, the reinforcing filler is precipitated silica, the hydroxyl scavenger is hexamethyldisilazane, and the coupling agent is γ-aminopropyltriethoxysilane and γ-(2,3 - a mixture of glycidoxy)propyltrimethoxysilane, the crosslinking agent being a mixture of n-methyltrimethoxysilane and vinyltriethoxysilane, the catalyst being anilinomethyltriethoxy silane.

[0048] The preparation method of above-mentioned transparent dealcoholization type one-component RTV silicone rubber sealant comprises the steps:

[0049] (1) Vacuum stir the α,ω-dihydroxy polydimethylsiloxane, simethicone oil...

Embodiment 3

[0053] A transparent dealcoholized one-component RTV silicone rubber sealant, the RTV silicone rubber sealant comprises the following raw materials in parts by mass:

[0054]

[0055] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 26000cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 340cps Silicone oil, the reinforcing filler is hydrophilic fumed silica and precipitated silica, the hydroxyl scavenger is hexamethyldisilazane, and the coupling agent is γ-aminopropyltriethoxy A mixture of silane and γ-(2,3-glycidoxy)propyltrimethoxysilane, the crosslinking agent being a mixture of ethyl orthosilicate, methyl orthosilicate and vinyltrimethoxysilane, The catalysts are diethylaminomethyltriethoxysilane and anilinomethyltriethoxysilane.

[0056] The preparation method of above-mentioned transparent dealcoholization type one-component RTV silicone rubber sealant, described method co...

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Abstract

The invention relates to a transparent dealcoholized single-component RTV silicone rubber sealant and a preparation method thereof. The preparation method comprises the following steps: stirring 100 parts by mass of alpha, omega-dihydroxyl polydimethylsiloxane, 3 to 10 parts by mass of dimethicone, 5 to 10 parts by mass of a reinforcing filling material and 1 to 5 parts by mass of a hydroxyl radical scavenger under vacuum in a power mixer; then adding 0.3 to 2 parts of a coupling agent and carrying out stirring under vacuum; and adding 1 to 10 parts of a cross-linking agent and 0.1 to 3 parts of a catalyst and carrying out stirring under vacuum and packaging so as to obtain a finished product. The sealant provided by the invention has the advantages of yellowing resistance, a fast curing speed, no toxicity, environment friendliness, etc.

Description

technical field [0001] The invention relates to the technical field of silicone rubber preparation, in particular to a transparent dealcoholized one-component RTV silicone rubber sealant and a preparation method thereof. Background technique [0002] With the rapid development of electronics, construction and aviation industries, silicone room temperature vulcanized silicone rubber has been widely used in the industry due to its neutral properties, non-corrosiveness to substrates, non-toxicity, strong adaptability and low cost. And the favor of researchers and get rapid development. At the same time, one-component room temperature vulcanized silicone rubber (RTV), that is, it can be cured at room temperature without adding other components, easy to use, small shrinkage after curing, good adhesion to most materials, and good electrical insulation Resistance, weather resistance, flex resistance, high temperature resistance and aging resistance, etc. It has a very wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10
Inventor 王地林陈超翁祝强
Owner 兆舜科技(广东)有限公司
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