Butyronitrile insulation layer material with high elongation and ablation resistance and preparation method of butyronitrile insulation layer material

A high-elongation, ablation-resistant technology, applied in the field of structural thermal insulation layers, which can solve the problems of high thermal decomposition temperature, material burning, and large filling coefficient.

Inactive Publication Date: 2018-03-23
西安长峰机电研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] EPDM rubber is ideal for engines because of its high thermal decomposition temperature, large thermal decomposition heat absorption, good thermal oxygen aging resistance, large filling coefficient, and good compatibility with various propellants and shell composite materials. The thermal insulation material in the shell, but the polarity of EPDM is low, and the bonding performance is poor, which limits its structural application ability
[0005] In addition, the common sulfur vulcanized rubber system is prone to the risk of material burning, which affects the performance of the material

Method used

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  • Butyronitrile insulation layer material with high elongation and ablation resistance and preparation method of butyronitrile insulation layer material
  • Butyronitrile insulation layer material with high elongation and ablation resistance and preparation method of butyronitrile insulation layer material
  • Butyronitrile insulation layer material with high elongation and ablation resistance and preparation method of butyronitrile insulation layer material

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preparation example Construction

[0027] The preparation process of the thermal insulation layer material of the present invention is as follows:

[0028] 1) According to the ratio, ingredients;

[0029] 2) Dry the weighed aramid chopped fiber and white carbon black at 80°C for 1 hour;

[0030] 3) Pass the weighed nitrile rubber on the mill for 5 to 8 times;

[0031] 4) Add zinc oxide, stearic acid, silicon carbide, boron phenolic resin, decabromodiphenyl ether, and antimony trioxide to nitrile rubber in sequence, and the roller distance is 3 mm; cut the rubber and roll 3 times;

[0032] 5) Add white carbon black and dioctyl sebacate several times, the roller distance is 3mm; cut glue and roll 3 times;

[0033] 6) Add aramid chopped fiber several times, cut glue and roll 3 times, the roller distance is 3mm;

[0034] 7) Thin pass 2 times, the roller distance is 0.3mm, and then the roller distance is 3mm, cut the rubber and roll 2 times; repeat this step 3 times;

[0035] 8) Add dicumyl peroxide, roll distan...

example 1

[0041] (1) Weigh each component of the formula

[0042] Weigh the ingredients of the formula according to the table below.

[0043]

[0044] (2) heat insulation layer refining

[0045] a) Dry the weighed aramid chopped fiber and white carbon black at 80°C for 1 hour;

[0046] b) Thinly pass the nitrile rubber on the mill for 5 to 8 times;

[0047] c) Add zinc oxide, stearic acid, silicon carbide, boron phenolic resin, decabromodiphenyl ether, and antimony trioxide in sequence, and the roll distance is 3 mm; cut glue and roll 3 times;

[0048] d) Add white carbon black and dioctyl sebacate in 3 times, the roller distance is 3mm; cut glue and roll 3 times;

[0049] e) Add aramid chopped fiber in 5 times, cut glue and roll 3 times, the roller distance is 3mm;

[0050] f) Thin pass 2 times, the roller distance is 0.3mm, and then cut the glue and roll 2 times at the roller distance 3mm; repeat this step 3 times;

[0051] g) Dicumyl peroxide is added, the roller distance is ...

example 2

[0060] (1) Weigh each component of the formula

[0061] Weigh the ingredients of the formula according to the table below.

[0062]

[0063]

[0064] (2) heat insulation layer refining

[0065]a) Dry the weighed aramid chopped fiber and white carbon black at 80°C for 1 hour;

[0066] b) Thinly pass the nitrile rubber on the mill for 5 to 8 times;

[0067] c) Add zinc oxide, stearic acid, silicon carbide, boron phenolic resin, decabromodiphenyl ether, and antimony trioxide in sequence, and the roll distance is 3 mm; cut glue and roll 3 times;

[0068] d) Add white carbon black and dioctyl sebacate in 3 times, the roller distance is 3mm; cut glue and roll 3 times;

[0069] e) Add aramid chopped fiber in 5 times, cut glue and roll 3 times, the roller distance is 3mm;

[0070] f) Thin pass 2 times, the roller distance is 0.3mm, and then cut the glue and roll 2 times at the roller distance 3mm; repeat this step 3 times;

[0071] g) Dicumyl peroxide is added, the roller d...

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Abstract

The invention provides a butyronitrile insulation layer material with high elongation and ablation resistance and a preparation method of the butyronitrile insulation layer material. The prepared butyronitrile insulation layer material with high elongation and ablation resistance comprises components in parts by weight as follows: 100-102 parts of nitrile rubber, 1.5-3 parts of stearic acid, 5-8 parts of zinc oxide, 8-10 parts of silicon carbide, 20-25 parts of boron-containing phenolic resin, 20-30 parts of decabromodiphenyl ether, 10-15 parts of antimony trioxide, 15-20 parts of white carbonblack, 10-20 parts of dioctyl sebacate, 5-8 parts of chopped aramid fiber and 3-5 parts of dicumyl peroxide. With the adoption of a dicumyl peroxide vulcanization system and addition of materials such as white carbon black, functional phenolic resin and the like, mechanical property and ablation resistance of a nitrile rubber insulation layer are improved, and high elongation and ablation resistance of nitrile rubber insulation layer are improved.

Description

technical field [0001] The invention relates to a heat-proof and heat-insulating layer material in the combustion chamber of a solid rocket motor, which is also suitable for structural heat-insulating layers, such as soft partitions for pulse engines, propellant coating sleeves, and the like. Background technique [0002] The heat insulation layer is an important part of the heat-proof structure of the solid rocket motor. It prevents the temperature in the combustion chamber of the engine from reaching its structural integrity and is responsible for resisting high temperature, high gas flow and particle erosion. For the structural insulation layer, it also plays an important role in safely isolating the propellant and protecting the propellant from abnormal ignition. Common insulation layer materials mainly include EPDM rubber insulation layer, nitrile rubber insulation layer and rubber / fiber composite insulation layer materials. With the development of rocket and missile t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L61/14C08L77/10C08K13/02C08K5/09C08K3/22C08K3/34C08K5/06C08K3/36C08K5/11C08K5/14
CPCC08L9/02C08K2003/2296C08L2201/08C08L2205/03C08L2205/16C08L61/14C08L77/10C08K13/02C08K5/09C08K3/22C08K3/34C08K5/06C08K3/2279C08K3/36C08K5/11C08K5/14
Inventor 秦锋包乐祁本利李晓奋耿志刚张崇耿
Owner 西安长峰机电研究所
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