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One-component room temperature vulcanizing silicone fireproof sealant and preparation method thereof

A fireproof sealant, vulcanized silicone technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc. Improve the cost and other issues, and achieve the effects of excellent weathering resistance, good adhesion, and excellent high and low temperature resistance.

Inactive Publication Date: 2011-03-16
TIANYUAN HUAWEI GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technology for preparing fireproof sealant not only increases the cost (platinum complexes are very expensive), but also cannot meet the flame retardancy and cohesiveness required by current nuclear power plants.

Method used

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  • One-component room temperature vulcanizing silicone fireproof sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 90 parts of α, ω-dihydroxy polydimethylsiloxane, 30 parts of methyl silicone oil, 70 parts of nano-calcium carbonate and flame retardant (ZL-01 environmentally friendly flame retardant, manufacturer: Silicon Materials of Chengdu High-tech Zone Co., Ltd.) 40 parts were sequentially added to the vacuum kneader and stirred, and heated while stirring. When the temperature reached 80°C, vacuuming was started, and the vacuum degree was 0.08MPa. After the temperature reached 150°C, the heating was stopped, and the vacuum was stirred for 3 hours. The cooled material is ground with a three-roll mill until the particle size is ≤1 μm to obtain the base material.

[0024] At room temperature, add the above-mentioned base material into a vacuum high-speed disperser, then add 2 parts of r-aminopropyltriethoxysilane, 3 parts of dibutyltin dilaurate, and 15 parts of methyl tributylketoximosilane in sequence. Under the conditions of vacuum degree 0.08MPa, rotation speed 20rpm, stirring ...

Embodiment 2

[0026] Add 110 parts of α, ω-dihydroxy polymethyl vinyl siloxane, 25 parts of methyl silicone oil, 90 parts of silicon micropowder and 50 parts of environmentally friendly flame retardant into the vacuum kneader and stir, and heat while stirring. When it reaches 100°C, start vacuuming, the degree of vacuum is 0.06MPa, stop heating after the temperature reaches 150°C, and stir in vacuum for 2 hours. The cooled material is ground with a three-roll mill until the particle size is ≤1 μm to obtain the base material.

[0027] At room temperature, add the above-mentioned base material into a vacuum high-speed disperser, and then add 5 parts of r-aminopropyltrimethoxysilane, 1 part of dibutyltin diacetate, and 20 parts of vinyl tributylketoximosilane in turn. 0.07MPa, rotating speed 35rpm, stirring and reacting for 80 minutes, a one-component room temperature vulcanized silicone fireproof sealant was prepared. The product performance test results are shown in Table 1.

Embodiment 3

[0029] Add 100 parts of α, ω-dihydroxy polydivinyl siloxane, 20 parts of methyl silicone oil, 80 parts of fumed silica and 30 parts of environmentally friendly flame retardant into the vacuum kneader and stir, and heat while stirring. When the temperature reaches 90°C, start vacuuming, the degree of vacuum is 0.065MPa, stop heating when the temperature reaches 150°C, and stir in vacuum for 4 hours. The cooled material is ground with a three-roll mill until the particle size is ≤1 μm to obtain the base material.

[0030] At room temperature, put the above base material into a vacuum high-speed disperser, and then add 1 part of r-(2,3 glycidoxy)propyltrimethoxysilane, 2 parts of dibutyltin dioctoate, phenyltributanone oxime 10 parts of base silane, under the conditions of vacuum degree of 0.06MPa and rotation speed of 100rpm, stirred and reacted for 40 minutes to prepare a one-component room temperature vulcanized silicone fireproof sealant. The product performance test results ...

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Abstract

The invention relates to one-component room temperature vulcanizing silicone fireproof sealant. A preparation process comprises the following steps of: sequentially adding 90 to 110 weight parts of alpha, omega-dihydroxy polysiloxane, 20 to 40 weight parts of methyl silicone oil, 70 to 90 weight parts of filler and 30 to 50 weight parts of flame retardant into a vacuum kneading machine, and stirring at the temperature of between 100 and 150 DEG C under the vacuum degree of 0.06 to 0.08MPa for 2 to 4 hours to obtain a base material; and adding the base material into a vacuum high-speed stirrer, sequentially adding 1 to 5 weight parts of coupling agent, 1 to 5 weight parts of catalyst and 10 to 20 weight parts of cross-linking agent, and reacting under the vacuum degree of 0.06 to 0.08MPa at the rotating speed of 20 to 100rpm for 40 to 100 minutes with stirring to obtain the one-component room temperature vulcanizing silicone fireproof sealant. The prepared sealant has good flame retarding effect and high physicochemical property and is a novel high-performance fireproof material in nuclear power and building industries.

Description

technical field [0001] The invention relates to a one-component room temperature vulcanized silicone fireproof sealant and a preparation method thereof, belonging to fireproof and flame-retardant materials. technical background [0002] With the progress of society and the strengthening of environmental protection, people are more and more aware of the seriousness of the consequences of fire secondary pollution (smoke, poisonous gas emission and serious corrosion problems caused by burning). Halogen is used as a flame retardant filler in traditional fireproof materials. Halogen flame retardants have high flame retardant efficiency, moderate price and wide application range. However, the smoke released during combustion contains hydrogen halide, which is a poisonous and corrosive gas. Among inorganic flame retardants, aluminum hydroxide and magnesium hydroxide are the two most commonly used. Compared with halogen-based and phosphorus-based flame retardant systems, they have...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10
Inventor 孙和平张海凤
Owner TIANYUAN HUAWEI GRP
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