Rubber combined type low-ablation heat-insulating material and preparation method thereof

Abstract

The invention discloses a rubber combined type low-ablation heat-insulating material, which comprises the following components in parts by mass: 70 to 90 parts of ethylene propylene diene monomer, 10 to 30 parts of chloroprene rubber, 10 to 30 parts of benzoxazine, 20 to 50 parts of silicon resin, 20 to 50 parts of heat-resistant resin, 5-15 parts of a reinforcing agent, 10 to 20 parts of organic fiber, 10 to 30 parts of a flame retardant, 10 to 30 parts of a carbon nanotube, 5 to 10 parts of a plasticizer, 6 to 15 parts of a metal oxide, 1 to 2 parts of an anti-aging agent (RD), 1 to 2 parts of stearic acid, and 2 to 5 parts of a vulcanizing agent. The material improves the erosion resistance of high-temperature particles in an overload environment, and meets the requirement on the erosion resistance of a heat insulating layer under the overload of an engine.

Description

technical field [0001] The invention relates to the technical field of ablation-resistant materials, in particular to a rubber-combined low-ablation thermal insulation material and a preparation method thereof. Background technique [0002] Solid rocket motor case insulation is an important part of the negative mass of the motor. For the composite material shell, its negative mass usually accounts for 15% to 30% of the total mass of the shell. The negative mass of the engine has a considerable impact on the performance of the rocket, especially the top engine or the on-board engine of the satellite. If the negative mass can be reduced by 1kg, the range can be increased by 7.2km or the payload can be increased by 1kg. At the same time, in order to improve the combat capability of weapons, some missiles put forward higher requirements for flight acceleration performance and maneuverability, and the design lateral overload is 40G. [0003] When the engine is flying with high ...

AI Technical Summary

Problems solved by technology

However, increasing the fiber content can increase the ablation resistance of the insulation layer within a certain range, but too much fiber filler will not only fail to improve the ablation resistance, but will also seriously affect the mechanical properties and process performance of the insulation layer. The production process is very difficult. It is difficult, and too much powder filler will also affect the mechanical and ablation properties of the insulation layer, and cannot effectively improve the ablation resistance of the insulation layer

[0005] The ablation resistance of the existing heat insulation layer materials is greatly affected by the overload acceleration, and the ablation rate of the heat insulation layer increases greatly under high overload conditions. Increasing the thickness of the heat insulation layer can achieve the purpose of effective thermal protection for the engine, but it also reduces the engine Therefore, in order to meet the requirements of high overload, ablation resistance, anti-scouring and reducing the weight of the heat insulation layer, a heat insulation layer with low ablation, good comprehensive performance and molding process is developed. Materials are of great significance, they can effectively increase the range of missiles and enhance the combat effectiveness of missile weapons

Images