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Ceramic flame-retardant and fireproof silicone rubber and preparation method thereof

A ceramicized flame retardant and silicone rubber technology, applied in the field of flame retardant and refractory materials, can solve the problems of poor flame retardant performance and processing performance, poor thermal stability of ammonium polyphosphate, low mechanical properties of ceramic body, etc., and improve the poor compatibility. , Excellent electrical insulation and fire resistance, excellent mechanical properties

Inactive Publication Date: 2018-03-06
GUANGDONG POLYSIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ammonium polyphosphate used in the ceramized silicone rubber has poor thermal stability, and the obtained ceramized silicone rubber products are easily deformed after secondary vulcanization (220°C×4h), which is difficult to meet the practical application requirements.
[0005] Chinese patent document CN105754344A discloses a ceramic silicone rubber and its preparation method. The ceramic silicone rubber is based on silicone rubber, and zinc oxide, talcum powder, muscovite, zinc borate, calcium carbonate, 38 # It is made of cylinder oil, aluminum hydroxide, magnesium hydroxide and vulcanizing agent. The silicone rubber has certain flame retardancy, but the mechanical properties of the ceramic body obtained after combustion are low, and it cannot withstand the impact of external force, so it cannot play an effective role. Refractory effect
Although the ceramized silicone rubber obtained by this method can obtain a hard and dense ceramic body at high temperature, its flame retardancy and processability are relatively poor, and it cannot be widely used.

Method used

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  • Ceramic flame-retardant and fireproof silicone rubber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The components in parts by mass are as follows: 80 parts of methyl vinyl silicone rubber with a molecular weight of 600,000 and a vinyl content of 0.2%, 20 parts of methyl vinyl silicone rubber with a molecular weight of 450,000 and a vinyl content of 0.05%. Surface area is 200m 2 30 parts of gas-phase hydrophilic silica per g, 40 parts of aluminum hydroxide with a particle size of 2 μm, 20 parts of low-melting glass powder with a melting point of 500 ° C, 40 parts of sericite powder with a particle size of 10 μm, and hydroxyl silicone oil with a viscosity of 25 cP 10 parts, 5 parts of hexamethyldisilazane, 1 part of alcohol-modified chloroplatinic acid with a platinum content of 1%, 2 parts of 2,4-dichlorobenzoyl peroxide.

[0040] The preparation method of vitrified refractory silicone rubber is as follows:

[0041] a. First mix 40 parts of aluminum hydroxide, 20 parts of low-melting point glass powder and 40 parts of sericite powder with a high-speed disperser, then...

Embodiment 2

[0047] The components in parts by mass are as follows: 90 parts of methyl vinyl silicone rubber with a molecular weight of 650,000 and a vinyl content of 0.05%, 10 parts of methyl vinyl silicone rubber with a molecular weight of 500,000 and a vinyl content of 3%. Surface area is 150m 2 40 parts of gas-phase hydrophilic silica per g, 30 parts of aluminum hydroxide with a particle size of 5 μm, 15 parts of low-melting glass powder with a melting point of 400 ° C, 30 parts of sericite powder with a particle size of 20 μm, and a viscosity of 28 cP 12 parts of hydroxyl silicone oil, 4 parts of hexamethyldisilazane, 1.2 parts of the reaction complex of triphenyl phosphite and chloroplatinic acid (the mass fraction of platinum is 5%), 2,4-dichlorobenzyl peroxide Acyl 2 parts.

[0048] The preparation method of vitrified refractory silicone rubber is as follows:

[0049] a. First mix 30 parts of aluminum hydroxide, 15 parts of low-melting point glass powder and 30 parts of sericite ...

Embodiment 3

[0055] The components in parts by mass are as follows: 80 parts of methyl vinyl silicone rubber with a molecular weight of 650,000 and a vinyl content of 0.05%, 20 parts of methyl vinyl silicone rubber with a molecular weight of 500,000 and a vinyl content of 3%. Surface area is 380m 2 20 parts of gas-phase hydrophilic silica per g, 50 parts of aluminum hydroxide with a particle size of 10 μm, 25 parts of low-melting glass powder with a melting point of 450 ° C, 50 parts of sericite powder with a particle size of 20 μm, and a viscosity of 30 cP 10 parts of hydroxyl silicone oil, 6.5 parts of hexamethyldisilazane, 1 part of platinum vinyl tetramethyldisiloxane complex (the mass fraction of platinum is 5%), 2,5-dimethyl-2, 2 parts of 5-bis(t-butylperoxy)hexane.

[0056] The preparation method of vitrified refractory silicone rubber is as follows:

[0057] a. First mix 50 parts of aluminum hydroxide, 25 parts of low-melting glass powder and 50 parts of sericite powder with a hi...

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Abstract

The invention discloses ceramic flame-retardant and fireproof silicone rubber and a preparation method thereof. The silicone rubber contains the following components in parts by weight: 100 parts of raw silicone rubber, 10-50 parts of white carbon black, 10-100 parts of aluminum hydroxide, 10-50 parts of low-melting-point glass powder, 10-100 parts of sericite powder, 1-20 parts of hydroxyl silicone oil, 1-20 parts of hexamethyl disilazane, 0.1-3 parts of a platinum compound and 0.1-5 parts of a vulcanizing agent. The silicone rubber is good in flame retardance, excellent in mechanical property, safe and environmentally friendly, has good mechanical strength and insulating property after being ablated, is capable of preventing burnt objects from being damaged and keeping a circuit completefor a long time and can play a good fireproof role.

Description

【Technical field】 [0001] The invention relates to ceramic flame-retardant and refractory silicone rubber and a preparation method thereof, belonging to the technical field of flame-retardant and refractory materials. 【Background technique】 [0002] In recent years, with the gradual improvement of people's awareness of fire safety, flame-retardant refractory materials are becoming more and more important to people's production and life. Gain valuable rescue time and reduce casualties and property losses. [0003] Ceramic flame retardant and refractory silicone rubber has the characteristics of ordinary silicone rubber at room temperature, and can be transformed into a hard and dense ceramic body and maintains the basic initial shape of the silicone rubber flame retardant fireproof material under open flame or high temperature environment. Compared with ordinary fireproof materials, the advantage of ceramizable silicone rubber is that it does not turn into ashes during combus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08K13/06C08K9/06C08K9/04C08K3/36C08K3/22C08K3/40C08K3/34C08K3/16C08K5/00
CPCC08K2003/2227C08K2201/003C08L83/04C08L2201/02C08L2201/22C08L2205/025C08L2205/03C08K13/06C08K9/06C08K9/04C08K3/36C08K3/22C08K3/40C08K3/34C08K3/16C08K5/0091
Inventor 贡玉圭王丰
Owner GUANGDONG POLYSIL TECH CO LTD
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