Low-temperature-resistant and ablation-resistant butadiene rubber vulcanized thermal insulation material, and preparation method and application thereof

A technology of butadiene rubber and thermal insulation materials, which is applied in the direction of mechanical equipment, jet propulsion devices, rocket engine devices, etc., can solve the problems of low glass transition temperature, achieve low glass transition temperature, excessive smoothness, and improve ablation resistance Effect

Active Publication Date: 2020-05-08
HUBEI INST OF AEROSPACE CHEMOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a low-temperature-resistant and ablation-resistant butadiene rubber vulcanized heat insulating material. It has excellent corrosion performance, which can meet the new requirements of the engine for heat insulation materials, meet the requirements of heat insulation materials for materials with excellent mechanical properties and ablation resistance at different temperatures, and at the same time meet the requirements of the engine for the mechanical properties of interlayer materials. Adhesive performance, and comprehensive performance requirements such as ablation resistance and erosion resistance

Method used

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  • Low-temperature-resistant and ablation-resistant butadiene rubber vulcanized thermal insulation material, and preparation method and application thereof
  • Low-temperature-resistant and ablation-resistant butadiene rubber vulcanized thermal insulation material, and preparation method and application thereof
  • Low-temperature-resistant and ablation-resistant butadiene rubber vulcanized thermal insulation material, and preparation method and application thereof

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preparation example Construction

[0048] The preparation method of the low-temperature-resistant and ablation-resistant butadiene rubber vulcanized heat insulating material of the present invention, the specific steps are:

[0049] The first step is to add butadiene rubber, reinforcing agent, high temperature resistant resin, tackifying resin, flame retardant, plasticizer, anti-aging agent RD, metal oxide to the double-roller internal mixer in proportion in sequence at room temperature . Stearic acid is practiced until it is evenly mixed;

[0050] In the second step, add a vulcanizing agent and a vulcanization accelerator in proportion to the double-roll mill for mixing, and then perform mixing after 7-8 times of thinning, and finally the thinning is uniformly produced;

[0051] In the third step, the product obtained in step (2) is vulcanized and molded in a flat vulcanizer at 150-160°C.

Embodiment

[0053] In the following various examples, the described line ablation and mass ablation rates are all measured according to the provisions of the National Military Standard "GJB323A-96 Ablation Test Method for Ablation Materials". 2mm, ablation distance 10mm, oxygen pressure 0.4MPa, acetylene pressure 0.1MPa, oxygen flow 0.6m 3 / h, acetylene flow rate 0.68m 3 / h, ablation time of 20 seconds) simulated ablation conditions; tensile strength and elongation at break were in accordance with "Q / G197-2008 Solid Rocket Motor Combustion Chamber Thermal Insulation Layer, Lining Material Tensile Strength, Elongation at Break The standard for the determination of elongation stipulates the mechanical properties of thermal insulation materials at 20°C and the pulling speed of 100mm / min. Test the bonding strength of the insulation material at 20°C and a pulling speed of 20mm / min. The glass transition temperature is tested according to the standard "Q / G325-2016 Method for Determination of G...

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Abstract

The invention relates to a low-temperature-resistant and ablation-resistant butadiene rubber vulcanized thermal insulation material, and a preparation method and an application thereof. A novel low-temperature-resistant base material is adopted, novel high-temperature-resistant and ablation-resistant resin is selected, a vulcanizing agent, a vulcanization accelerator and other preferable components are combined, the ratio of the optimal components is given, and an ablation-resistant technique is combined to vulcanize and mold a thermal insulation material, so the obtained material has very excellent low-temperature mechanical properties and excellent ablation performance, can meet new requirements of an engine on the thermal insulation material, meets the requirements of the thermal insulation material on excellent mechanical properties and ablation resistance of materials at different temperatures, and can meet the requirements of the engine on comprehensive properties such as the mechanical properties, the bonding performance, the ablation resistance and the erosion resistance of an interlayer material at the same time.

Description

technical field [0001] The invention relates to a low-temperature-resistant and ablation-resistant butadiene rubber heat insulation material, a heat insulation material that can still have excellent mechanical and ablation resistance properties at very low temperatures, a preparation method and application thereof, and belongs to the technology of ablation-resistant materials field, Background technique [0002] At present, the most widely used types of solid rocket motor insulation layers at home and abroad are mainly nitrile rubber (NBR) insulation layer and ethylene propylene diene monomer (EPDM) insulation layer. Due to the lower density of EPDM insulation layer, higher high temperature resistance and ablation resistance, EPDM insulation layer is more and more widely used in domestic strategic and tactical missile engines. EPDM thermal insulation material is mainly based on EPDM rubber mixed with additives such as flame retardants, fibers and inorganic fillers. It has l...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08L81/02C08L45/00C08L91/06C08K13/02C08K3/22C08K3/36C08K3/32C08K3/06C08K5/47C08K5/09F02K9/34F02K9/32
CPCC08L9/00F02K9/34F02K9/32C08L2201/02C08L2205/035C08K2003/2296C08K2003/323C08L81/02C08L45/00C08L91/06C08K13/02C08K3/22C08K3/36C08K3/32C08K3/06C08K5/47C08K5/09
Inventor 周俊王明超吴磊陈馨陈德宏陈雯张焱任雯君高梦娜万也迁
Owner HUBEI INST OF AEROSPACE CHEMOTECH
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