Turnable ethylene-propylene-diene rubber heat insulating layer material and preparation method thereof

Abstract

The invention provides a turnable ethylene-propylene-diene rubber heat insulating layer material which is prepared by weighing the components in parts by weight: 100 parts of ethylene-propylene-dienerubber, 5 parts of zinc oxide, 0.6 part of stearic acid, 20-25 parts of boron phenolic resin, 70-80 parts of silicon carbide nanofiller, 4-8 parts of aramid fibers, 30-40 parts of fumed silica, 3-10 parts of antimony oxide, 8-12 parts of decabromodiphenyl ether and 4-8 parts of dicumyl peroxide; sequentially adding ethylene-propylene-diene rubber, stearic acid, zinc oxide, boron phenolic resin, fumed silica, silicon carbide nanofiller, aramid fibers, antimony oxide, decabromodiphenyl ether and dicumyl peroxide into a mixing mill for mixing, and then, carrying out mill run according to the required thickness. The turnable ethylene-propylene-diene rubber heat insulating layer material not only meets requirements for turnability for the location of a free filling end burning grain, uniform mixing, environment friendliness of components and guaranteed supply sources, but also meets heat resistance and anti-scouring performance.

Description

technical field [0001] The invention relates to a thermal insulation material product, which can be used for internal thermal insulation of solid rocket motors. Background technique [0002] The role of the solid rocket motor insulation layer is mainly to protect the combustion chamber shell from being burned through or reduce its strength after being heated, to protect the combustion chamber shell from the corrosion of the grain, and to buffer the bonding stress between the grain and the shell. The commonly used turning heat insulation layer materials suitable for free-filling end-combustion powder columns in China mainly include 5-Ⅲ. The heat insulation layer is a hard heat insulation material containing asbestos. Question: D303 is a thermal insulation layer material combined with EPDM rubber and chloropropylene rubber. Due to the source of chloropropylene rubber raw materials, there are often supply disconnection problems. Contents of the invention [0003] In order to...

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Problems solved by technology

The commonly used turning heat insulation layer materials suitable for free-filling end-combustion powder columns in China mainly include 5-Ⅲ. The heat insulation layer is a hard heat insulation material containing asbestos. Problem: D303 is a thermal insulation layer material combined with EPDM rubber and chloropropylene rubber. Due to the source of chloropropylene rubber raw materials, there are often supply disconnection problems

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