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High-strength high-temperature-resistant flame-retardant silicone rubber and preparation method thereof

A high-temperature-resistant, high-strength technology, applied in the field of high-strength, high-temperature-resistant, flame-retardant silicone rubber and its preparation, can solve problems such as unsatisfactory flame retardancy, and achieve good high-temperature resistance and excellent mechanical properties

Inactive Publication Date: 2020-04-14
GUANGDONG POLYSIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition-curable silicone rubber composition prepared by this method has excellent physical and mechanical properties, but its flame retardancy is not ideal, and the UL94 flame retardant grade can only reach V-1 grade

Method used

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  • High-strength high-temperature-resistant flame-retardant silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The components of each raw material are as follows: 5 parts of methyl vinyl silicone rubber raw rubber with a molar mass of 500,000 g / mol and a vinyl content of 3%, methylvinyl silicone rubber with a molar mass of 700,000 g / mol and a vinyl content of 0.08%. Base vinyl silicone rubber raw rubber 95 parts, BET method specific area is 200m 2 40 parts of fumed white carbon black per gram, 20 parts of ammonium polyphosphate with a particle size of 2 μm, 2 parts of zirconium phosphate with a particle size of 22 nm, 10 parts of nano-titanium dioxide with a particle size of 5 nm, and nano-cerium oxide with a particle size of 7 nm 1.0 part, 8 parts of hydroxyl silicone oil with a mass fraction of hydroxyl group of 4.0% and a viscosity of 28 centipoise, 0.5 part of zinc stearate, 0.1 part of polyethylene glycol, 0.2 part of alcohol-modified chloroplatinic acid, and 0.5 part of benzotriazole Parts, 1.0 parts of 2,4-dichlorobenzoyl peroxide.

[0096] The preparation method of sili...

Embodiment 2

[0102] The components of each raw material are as follows: 2 parts of methyl vinyl silicone rubber raw rubber with a molar mass of 550,000 g / mol and a vinyl content of 4%, methylvinyl silicone rubber with a molar mass of 650,000 g / mol and a vinyl content of 0.05%. Base vinyl silicone rubber raw rubber 98 parts, BET method specific area is 150m 2 50 parts per g of fumed white carbon black, 10 parts of ammonium polyphosphate with a particle size of 0.5 μm, 5 parts of zirconium phosphate with a particle size of 30 nm, 8 parts of nano-titanium dioxide with a particle size of 10 nm, and nano-oxidized 0.5 parts of cerium, 10 parts of hydroxyl silicone oil with a mass fraction of hydroxyl group of 3.0% and a viscosity of 25 centipoise, 0.2 parts of zinc stearate, 0.5 parts of polyethylene glycol, 0.1 part of alcohol-modified chloroplatinic acid, benzotriazole 0.5 parts, 1.5 parts of 2,4-dichlorobenzoyl peroxide.

[0103] The preparation method of silicone rubber is the same as that ...

Embodiment 3

[0105] The components of each raw material are as follows: 10 parts of raw methyl vinyl silicone rubber with a molar mass of 450,000 g / mol and a vinyl content of 2%, methylvinyl silicone rubber with a molar mass of 600,000 g / mol and a vinyl content of 0.16%. Base vinyl silicone rubber raw rubber 90 parts, BET method specific area is 380m 2 30 parts per g of fumed white carbon black, 15 parts of ammonium polyphosphate with a particle size of 3 μm, 1 part of zirconium phosphate with a particle size of 30 nm, 5 parts of nano-titanium dioxide with a particle size of 5 nm, and nano-cerium oxide with a particle size of 7 nm 2.0 parts, 5 parts of hydroxyl silicone oil with a mass fraction of hydroxyl group of 4.0% and a viscosity of 35 centipoise, 0.3 part of zinc stearate, 0.3 part of polyethylene glycol, 0.5 part of alcohol-modified chloroplatinic acid, and 0.1 part of benzotriazole Parts, 2.0 parts of 2,4-dichlorobenzoyl peroxide.

[0106] The preparation method of silicone rubbe...

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Abstract

The invention discloses a high-strength high-temperature-resistant flame-retardant silicone rubber, which comprises the following components in parts by weight: 90 to 110 parts of a methyl vinyl silicone rubber raw rubber, 30 to 50 parts of white carbon black, 10 to 20 parts of ammonium polyphosphate, 1 to 5 parts of zirconium phosphate, 5 to 10 parts of nanometer titanium dioxide, 0.5 to 2.0 parts of nano cerium oxide, 5 to 10 parts of a structured control agent, 0.2 to 0.5 part of an internal demolding agent, 0.1 to 0.5 part of polyethylene glycol, 0.1 to 0.5 part of alcohol modified chloroplatinic acid, 0.1 to 0.5 part of benzotriazole, and 0.5-2 parts of an organic peroxide vulcanizing agent. The invention also provides a preparation method of the high-strength high-temperature-resistant flame-retardant silicone rubber. The high-strength high-temperature-resistant flame-retardant silicone rubber prepared by the invention has excellent physical and mechanical properties, high-temperature resistance, flame retardancy and the like.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a high-strength, high-temperature-resistant, flame-retardant silicone rubber and a preparation method thereof. 【Background technique】 [0002] Silicone rubber is a polymer elastomer with both organic and inorganic properties. It has many excellent properties, such as heat resistance, cold resistance, weather resistance, safety, transparency, good touch, etc., and is widely used In the field of electric power equipment, motor vehicles, construction, food industry, etc. [0003] The main skeleton of silicone rubber is composed of siloxane bonds, and the proportion of organic components is lower than that of ordinary organic rubber, so it has flame retardant properties. However, under severe conditions such as direct contact with flames, the silicone rubber will be ignited and burned. [0004] At present, in the published Chinese patent documents, there are still few patents spe...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L71/02C08L83/04C08K13/04C08K7/26C08K3/32C08K3/22C08K5/3475C08K5/098
CPCC08K2003/2213C08K2003/2241C08K2003/321C08K2003/323C08K2201/003C08K2201/011C08L83/04C08L2201/02C08L2201/08C08L2205/025C08L2205/035C08L71/02C08K13/04C08K7/26C08K3/32C08K3/22C08K5/3475C08K5/098
Inventor 贡玉圭王丰马汉喜
Owner GUANGDONG POLYSIL TECH CO LTD
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