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Flame-retardant ablation-resistant butyronitrile thermal insulation material and preparation method thereof

A thermal insulation material and ablation-resistant technology, which is applied in the field of flame-retardant and ablation-resistant nitrile insulation materials and their preparation, can solve problems such as poor ablation performance, non-flame retardancy, and loose carbon layers, so as to improve reliability and improve Flame retardancy, the effect of simple preparation method

Pending Publication Date: 2022-03-25
KAILUAN GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the common problems of non-flame retardancy, loose carbon layer and poor ablation performance after high-temperature gas ablation in nitrile rubber protective materials in the prior art, the invention provides a flame-retardant and ablation-resistant nitrile insulation material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An embodiment of the present invention provides a flame-retardant and ablation-resistant nitrile insulation material, which includes the following raw material components in parts by weight: 90 parts of nitrile rubber, 6 parts of modified phenolic fiber, and 10 parts of aryloxy-substituted polyphosphazene elastomer parts, 4 parts of zinc oxide, 3 parts of stearic acid, 12 parts of dibutyl phthalate, 25 parts of white carbon black, 15 parts of phenolic resin and 2 parts of dicumyl peroxide.

[0035] The preparation method of above-mentioned modified phenolic fiber comprises the steps:

[0036] Add the phenolic fiber with a length of 3 mm into acetone and ultrasonically clean it for 20 minutes, then add the ultrasonically cleaned phenolic fiber into an ethanol solution of sodium hydroxide with a mass concentration of 8%, ultrasonicate at room temperature for 35 minutes, and then neutralize it with 8wt% hydrochloric acid solution The excess lye on the surface of the phenol...

Embodiment 2

[0042] An embodiment of the present invention provides a flame-retardant and ablation-resistant nitrile insulation material, which includes the following raw material components in parts by weight: 95 parts of nitrile rubber, 10 parts of modified phenolic fiber, and 20 parts of alkoxy-substituted polyphosphazene elastomer 3 parts of zinc oxide, 2 parts of stearic acid, 10 parts of liquid paraffin, 15 parts of white carbon black, 5 parts of wollastonite powder and 2,5-dimethyl-2,5-bis(tert-butyl peroxy ) 1.5 parts of hexane.

[0043] The preparation method of above-mentioned modified phenolic fiber comprises the steps:

[0044]Add the phenolic fiber with a length of 3 mm into acetone and ultrasonically clean it for 20 minutes, then add the ultrasonically cleaned phenolic fiber into an ethanol solution of sodium hydroxide with a mass concentration of 8%, ultrasonicate at room temperature for 30 minutes, and then neutralize it with 8wt% hydrochloric acid solution The excess lye ...

Embodiment 3

[0050] An embodiment of the present invention provides a flame-retardant and ablation-resistant nitrile insulation material, which includes the following raw material components in parts by weight: 100 parts of nitrile rubber, 15 parts of modified phenolic fiber, fluoroalkoxy polyphosphazene elastomer 15 parts, 2 parts of zinc oxide, 1.5 parts of stearic acid, 3 parts of dibutyl phthalate, 18 parts of carbon black, 10 parts of phenolic resin and 3 parts of di-tert-butyl peroxide.

[0051] The preparation method of above-mentioned modified phenolic fiber comprises the steps:

[0052] Add the phenolic fiber with a length of 6 mm into acetone and ultrasonically clean it for 20 minutes, then add the ultrasonically cleaned phenolic fiber into an ethanol solution of sodium hydroxide with a mass concentration of 8%, ultrasonicate at room temperature for 35 minutes, and then neutralize it with 8wt% hydrochloric acid solution The excess lye on the surface of the phenolic fiber is washe...

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PUM

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Abstract

The invention relates to the technical field of thermal insulation materials, and particularly discloses a flame-retardant ablation-resistant butyronitrile thermal insulation material and a preparation method thereof. The butyronitrile thermal insulation material is prepared from 80 to 100 parts of nitrile rubber, 5 to 30 parts of modified phenolic fiber, 10 to 40 parts of polyphosphazene elastomer, 1 to 5 parts of zinc oxide, 1 to 3 parts of stearic acid, 3 to 15 parts of plasticizer, 10 to 30 parts of reinforcing agent, 0 to 30 parts of heat-resistant filler and 1 to 3 parts of vulcanizing agent, wherein the modified phenolic fibers are alkali etching modified phenolic fibers. The modified phenolic fiber is used as an ablation-resistant fiber skeleton, and the polyphosphazene elastomer is used as a second matrix, so that the flame retardance, the erosion resistance and the ablation resistance of the butyronitrile thermal insulation material are effectively improved, and the performance requirements of a solid rocket engine on a thermal insulation layer material under overload are met.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a flame-retardant and ablation-resistant nitrile thermal insulation material and a preparation method thereof. Background technique [0002] The propellant in the combustion chamber of the solid rocket motor will generate extremely high temperature and pressure after combustion. In order to prevent the engine casing from contacting with high-temperature gas and causing damage to its structural integrity, it is usually necessary to install the propellant between the inside of the engine casing and the propellant grain. Lay insulation to protect it from heat. The thermal insulation layer takes away most of the heat through its continuous ablation and decomposition to slow down the transmission speed of high-temperature gas to the casing, thereby preventing the casing from reaching a temperature that threatens its structural integrity, thereby ensuring the norma...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L61/06C08L85/02C08K3/22C08K5/09
CPCC08L9/02C08L2201/02C08L2205/16C08K2003/2296C08L61/06C08L85/02C08K3/22C08K5/09
Inventor 王亚涛马小丰吴战鹏吴剑董金明刘莉莉李建华
Owner KAILUAN GRP
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