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Expanding flame-retardant silicone rubber and preparation method thereof

A technology of intumescent flame retardant and intumescent flame retardant, which is applied in the field of polymers, can solve the problems that the reinforcement effect of flame retardants cannot be explained, and the mechanical properties of silicone rubber have not been clarified, so as to reduce adverse effects, reduce combustion performance, and improve The effect of flame retardant effect

Active Publication Date: 2016-11-16
北京勇搏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvement of the mechanical properties of this patent is mainly due to the use of fumed silica, and there is no clear comparison of the mechanical properties of silicone rubber with and without intumescent flame retardants, and it cannot explain the reinforcing effect of flame retardants on the silicone rubber matrix

Method used

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  • Expanding flame-retardant silicone rubber and preparation method thereof
  • Expanding flame-retardant silicone rubber and preparation method thereof
  • Expanding flame-retardant silicone rubber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] Add 10g of melamine into the four-necked bottle, add 70mL of toluene solution, at room temperature and pass N 2 Stir for 30min under normal conditions, then add 40g of polyimide, raise the temperature to 100°C, stir for 1h, keep for 2h, and then vacuumize to remove toluene. The precipitate was washed with a solvent and centrifuged again, and the above steps were repeated until no unreacted substance was detected in the washing solution. The precipitate was vacuum-dried at 80° C. for 10 hours to obtain a melamine-polyimide supramolecular network composite material.

[0037] Add 14.3g of ammonium polyphosphate and 4.2g of antioxidant 1010 into 90 grams of vinyl-terminated polysiloxane, and add 5 grams of hydrogen-containing polysiloxane and 0.3 gram of chloroplatinic acid, at room temperature at 3000 rpm Stirring / minute to mix for 50 minutes. Add 1.4 g of melamine-polyimide supramolecular network composite material to the above mixture, and stir for 20 minutes at a cert...

Embodiment 2

[0040] Add 15g of melamine into the four-necked bottle, add 80mL of toluene solution, at room temperature and pass N 2 Stir for 40min under normal conditions, then add 60g of polyimide, raise the temperature to 110°C, stir for 1.5h, keep for 3h, and then vacuumize to remove toluene. The precipitate was washed with a solvent and centrifuged again, and the above steps were repeated until no unreacted substance was detected in the washing liquid. The precipitate was vacuum-dried at 90° C. for 9 hours to obtain a melamine-polyimide supramolecular network composite material.

[0041]Add 17.8g of ammonium polyphosphate and 5.4gg of antioxidant 1010 into 90 grams of vinyl-terminated polysiloxane, add 5 grams of hydrogen-containing polysiloxane and 0.3 gram of chloroplatinic acid, and turn at room temperature at 3500 / min stirring to mix for 40 minutes. Add 1.8 g of melamine-polyimide supramolecular network composite material to the above mixture, and stir for 25 minutes at a certa...

Embodiment 3

[0044] Add 20g of melamine into the four-necked bottle, add 90mL of toluene solution, at room temperature and pass N 2 Stir for 50min under normal conditions, then add 80g of polyimide, raise the temperature to 100°C, stir for 2h, keep for 4h, and then vacuumize to remove toluene. The precipitate was washed with a solvent and centrifuged again, and the above steps were repeated until no unreacted substance was detected in the washing liquid. The precipitate was vacuum-dried at 100° C. for 8 hours to obtain a melamine-polyimide supramolecular network composite material.

[0045] Add 21.4g of ammonium polyphosphate and 6.4g of antioxidant 1010 into 90 grams of vinyl-terminated polysiloxane, and add 5 grams of hydrogen-containing polysiloxane and 0.3 gram of chloroplatinic acid, at room temperature at 4000 rpm / min stirring to mix for 30 minutes. Add 2.1 g of melamine-polyimide supramolecular network composite material to the above mixture, and stir for 30 minutes at a certain...

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Abstract

The invention relates to expanding flame-retardant silicone rubber and a preparation method thereof. The expanding flame-retardant silicone rubber consists of the following components in parts by weight: 90 to 95 parts of vinyl-terminated polysiloxane, 5 to 10 parts of hydrogen-containing polysiloxane, 0.3 to 0.5 part of a catalyst and 20 to 30 parts of an expanding flame retardant, wherein the expanding flame retardant consists of ammonium polyphosphate, tetra[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoic acid]pentaerythritol ester and a melamine-polyimide supermolecular network composite material. A supermolecular technology is adopted to modify the flame retardant and prepare the flame-retardant silicone rubber, so that the combustion performance of the obtained silicone rubber is obviously reduced, the mechanical performance, the heat stability and the flame retardance can be remarkably improved, and the application fields are broadened.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an intumescent flame-retardant silicone rubber and a preparation method thereof. Background technique [0002] The silicone rubber industry is impressive. With the growth of consumption in the silicone rubber industry, the original high-performance special rubber has been transformed into a popular synthetic rubber, becoming one of the most widely used synthetic rubber varieties. Silicone rubber itself is easy to burn, which to some extent limits its application in the fields of electronics, automobiles, and aerospace. Therefore, it is necessary to modify silicone rubber to expand its application range. [0003] Research on flame retardant silicone rubber has made some progress. Traditional halogen-based flame retardants can achieve a good flame-retardant effect, but they will release toxic hydrogen halide gas during combustion, which is easy to cause harm to the human body an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08L87/00C08K3/32C08K5/134C08G83/00
CPCC08G83/008C08L83/04C08L2201/02C08L2201/08C08L2205/025C08L2205/03C08L87/00C08K2003/323C08K5/1345
Inventor 王锦成韦小凤杨思远李智杰南子婧尹聪毅
Owner 北京勇搏科技有限公司
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