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Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof

A room temperature vulcanization, silicone rubber technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of limited application of silicone rubber and long curing time, and achieve good curing cross-linking performance and curing time. Short, low-energy effects

Inactive Publication Date: 2017-05-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Chinese patent document CN102146208A prepared a transparent dealcoholized one-component room temperature vulcanized silicone rubber, in addition to the base rubber, crosslinking agent, filler, etc., an organotin catalyst was added. This catalyst is a moderately poisonous substance that limits the silicon Application of rubber
And if no catalyst is added to the above two formulations, the curing time will become very long

Method used

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  • Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof
  • Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof
  • Autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] At a temperature of 27°C and a humidity of 43%, 100 parts of α, ω-dihydroxypolydimethylsiloxane (relative molecular weight 39000g / mol) with a viscosity of 3000cSt and 15 parts of precipitated silica Add it into the planetary stirring tank, raise the temperature to 150°C, mix for 30min under the vacuum condition of -0.09~-0.1MPa, and cool down to below 40°C. If it is viscous (poor fluidity), add an appropriate amount of cyclohexane to dilute, and then add 2.25 parts of α-(N-n-butyl)aminomethyltriethoxysilane as a crosslinking agent at -0.09~-0.1 Stir under MPa vacuum until uniform without bubbles. Curing, that is, from catalyzed deketoxime type room temperature vulcanizing silicone rubber.

[0046] Put it on a horizontal surface, and use the finger touch method to measure the surface dry time of 2'45" using GB / T13477.5-2002 Building Sealing Materials Test Method Five Part Five Surface Dry Time Determination.

[0047] The resulting self-catalyzed dealcoholized room temp...

Embodiment 2

[0050] According to the steps of Example 1, the difference is that the crosslinking agent is replaced by 2.25 parts of α-(N-cyclohexyl)aminomethyltriethoxysilane, and the performance test results are shown in Table 1.

Embodiment 3

[0052] According to the steps of Example 1, the difference is that the crosslinking agent is replaced by α-(N,N-diethyl)aminomethyltriethoxysilane, and the performance test results are shown in Table 1.

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Abstract

The invention relates to autocatalytic and dealcoholized room-temperature vulcanized silicone rubber and a preparation method thereof. The room-temperature vulcanized silicone rubber is prepared from, by mass, 50-100 parts of terminal hydroxyl polydimethylsiloxane, 5-25 parts of filler and 0.3-5 parts of cross-linking agent. The room-temperature vulcanized silicone rubber can be rapidly cured without organo-tin compounds and other catalysts, the cost is reduced, the harm of the used organo-tin compound to the environment and organisms is also avoided, and therefore the application field of the silicone rubber. The room-temperature vulcanized silicone rubber using alpha-amine methyl triethoxysilane as a cross-linking agent is high in curing speed, good in mechanical property and excellent in thermal performance and has the advantages of being free of corrosion, low in energy consumption and free of pollution.

Description

technical field [0001] The invention belongs to the technical field of one-component dealcoholization type room temperature vulcanization silicone rubber, in particular to a self-catalyzed dealcoholization type room temperature rapid vulcanization silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is one of the most important synthetic rubbers. It has excellent weather resistance, thermal stability, low temperature toughness and electrical insulation. It is widely used in different fields, such as aerospace, electronic appliances, textiles, construction, etc. RTV silicone rubber is mainly used as adhesive sealant, potting material and mold. Among them, the largest amount is the sealant in the construction and decoration market, and one of the typical applications is the glass curtain wall. The glass and the aluminum alloy frame are bonded with silicone structural adhesive as the exterior wall material, and the expansion joints ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06
CPCC09J183/06C08K3/26C08K3/36C08K5/544C08K2003/265C08K2201/011C09J11/04C09J11/06
Inventor 贝逸翎刘子厚冯圣玉朱庆增
Owner SHANDONG UNIV
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