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High overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material

A technology of EPDM rubber and thermal insulation material, applied in the field of EPDM rubber (hereinafter referred to as EPDM rubber) thermal insulation material, can solve the problems of reducing the engine loading coefficient, complex implementation process, reducing the range of weapons, etc. High temperature particle erosion resistance, improved carbonization strength, and increased range

Active Publication Date: 2017-05-31
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the thickness of the thermal insulation material can achieve the purpose of effective thermal protection for the engine, but at the same time it also reduces the loading factor of the engine and reduces the range of the weapon; while the hard ablation-resistant thermal insulation material generally has poor toughness (the elongation rate is about 10 %), high density (about 1.4g / cm 3 ), and the implementation process is complex

Method used

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  • High overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material
  • High overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material
  • High overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material

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Experimental program
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Effect test

Embodiment 1

[0030] (1) The composition of the anti-high overload ablation EPDM thermal insulation material is as follows:

[0031] EPDM rubber: 100; Aramid fiber: 20; Asbestos fiber: 8; Silica: 25;

[0032] Zinc oxide: 3; liquid paraffin: 5; ammonium polyphosphate: 5; decabromodiphenyl ether: 20;

[0033] Antimony trioxide: 10; Dicumyl peroxide: 2.

[0034] Preparation method: weigh the above components in proportion, mix the weighed components with an open mill according to the general rubber mixing process, and then vulcanize and mold them under the condition of (150-160) ° C × 5 MPa × 60 min .

[0035] (2) See Table 1 for the properties of EPDM thermal insulation materials resistant to high overload ablation.

[0036]

Embodiment 2

[0038] (1) The composition of the anti-high overload ablation EPDM thermal insulation material is as follows:

[0039] EPDM rubber: 100; heterocyclic aramid fiber: 15; asbestos fiber: 5;

[0040] Silicon dioxide: 12; Zinc oxide: 5; Liquid paraffin: 10; Ammonium sulfate: 15;

[0041] Decabromodiphenyl ether: 30; Antimony trioxide: 15; Dicumyl peroxide: 3.

[0042] Preparation method, with embodiment 1.

[0043] (2) See Table 2 for the properties of the high overload ablation EPDM thermal insulation material.

[0044]

Embodiment 3

[0046] (1) The composition of the anti-high overload ablation EPDM thermal insulation material is as follows:

[0047] EPDM rubber: 100; Aramid fiber: 18; Asbestos fiber: 12; Silica: 20;

[0048] Zinc oxide: 5; liquid paraffin: 10; ammonium polyphosphate: 10; decabromodiphenyl ether: 10; antimony trioxide: 5; dicumyl peroxide: 1; 2,5-dimethyl 2,5 -(di-tert-butylperoxy)hexane: 2.

[0049] Preparation method, with embodiment 1.

[0050] (2) The properties of EPDM thermal insulation material against high overload ablation are shown in Table 3.

[0051]

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Abstract

The invention provides a high overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material which is prepared from 100 of EPDM, 15 to 20 of aromatic polyamide organic fiber, 5 to 12 of inorganic fiber, 12 to 25 of a silicon dioxide strengthening agent, 3 to 5 of zinc oxide, 5 to 15 of a petroleum based softener, 5 to 20 of an ammonium salt flame retardant, 10 to 30 of deca-brominated diphenyl ether, 5 to 15 of antimonous oxide and 2 to 4 of a peroxide vulcanizing agent, wherein the aromatic polyamide organic fiber is aramid fiber or heterocyclic aramid fiber; the inorganic fiber is asbestos fiber or ceramic fiber; the petroleum based softener is one of liquid paraffin and naphthenic oil. The high overload ablation resistant EPDM elastic heat insulation material is excellent in overload ablation resistance and relatively high in mechanical property and processing property, is applicable to the requirement of a high overload engine for the erosion resistance of an inner heat insulation material; therefore, effective heat insulation is guaranteed, the thickness of a heat insulation layer can be reduced, and the packing factor of the engine is increased.

Description

technical field [0001] The invention relates to an ethylene propylene diene monomer (hereinafter referred to as EPDM rubber) thermal insulation material capable of resisting high overload (40g) ablation, in particular to an EPDM elastic thermal insulation material added with organic fibers and inorganic fibers at the same time. Background technique [0002] In order to improve the combat capability of weapons, some missiles put forward higher requirements on flight acceleration performance and maneuverability, and the design lateral overload is nearly 40g. When the engine is flying with high maneuverability and overload, due to the deflection and accumulation of high-temperature particles, the heat insulation layer in the direction of centrifugal force will be severely ablated, and the ablation resistance of existing heat insulation layer materials is greatly affected by overload acceleration. The layer ablation rate is greatly increased. Therefore, the thickness of the rub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L77/10C08L91/06C08L91/00C08K13/04C08K7/10C08K7/12C08K3/36C08K5/06C08K3/22C08K3/32C08K3/30C08K5/14
CPCC08L23/16C08L2201/02C08L2205/035C08L2205/16C08L77/10C08L91/06C08L91/00C08K13/04C08K7/10C08K7/12C08K3/36C08K2003/2296C08K5/06C08K3/2279C08K2003/323C08K2003/3054C08K5/14
Inventor 凌玲朱学文陈德宏付翔
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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