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Small molecule migration-resistant, low-smoke flame-retardant and ablation-resistant thermal insulation material and preparation method thereof

A technology of thermal insulation material and ablation resistance, which is applied in the field of ablation resistance materials and can solve the problems of complex regulation process of ablation resistance, poor resistance to small molecule migration, and poor flame retardant performance.

Active Publication Date: 2021-12-31
北京瑞亚达科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of poor small molecule migration resistance, complex control process of ablation resistance performance, poor flame retardancy and high smoke generation in the traditional flexible thermal insulation material matrix, the present invention Based on a new type of polyphosphazene elastomer material, a small molecule migration-resistant, low-smoke flame-retardant ablation-resistant thermal insulation material and its preparation method are provided

Method used

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  • Small molecule migration-resistant, low-smoke flame-retardant and ablation-resistant thermal insulation material and preparation method thereof
  • Small molecule migration-resistant, low-smoke flame-retardant and ablation-resistant thermal insulation material and preparation method thereof

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specific Embodiment 1

[0026] Specific example 1: polyphosphazene elastomer (substituent is aryloxy group), 100 parts; magnesium oxide, 1 part; zinc oxide, 3 parts; silicon dioxide, 30 parts; dicumyl peroxide, 1.5 parts. The thermal insulation material prepared by formula components has a tensile strength of 8.4MPa, an elongation at break of 328%, a linear ablation rate of 0.067mm / s, a mass ablation rate of 0.048g / s, and an oxygen index LOI value of 33 , flame retardant grade V0 grade, smoke density grade SDR is 28.9, absorption rate is 0.72% after soaking in nitrate ester for 4 weeks. Moreover, the vulcanization performance of the material is excellent, and the mixing process performance is excellent.

specific Embodiment 2

[0027] Specific embodiment 2: polyphosphazene elastomer (substituting group is aryloxy group), 100 parts; Magnesium oxide, 1 part; Zinc oxide 3 parts; Quartz fiber, 3 parts; Aramid fiber chopped, 5 parts; , 30 parts, phenolic resin, 5 parts, aluminum oxide powder, 15 parts; dicumyl peroxide, 1.5 parts. The thermal insulation material prepared by formula components has a tensile strength of 10.2MPa, an elongation at break of 125%, a linear ablation rate of 0.036mm / s, a mass ablation rate of 0.028g / s, and an oxygen index LOI value of 35 , Flame retardant grade V0, smoke density grade SDR 23.1, absorption rate 0.55% after soaking in nitrate ester for 4 weeks. Moreover, the vulcanization performance of the material is excellent, and the mixing process performance is excellent.

specific Embodiment 3

[0028] Specific embodiment 3: polyphosphazene elastomer (substituting group is aryloxy group), 100 parts; Magnesium oxide, 1 part; Zinc oxide 3 parts; Carbon fiber, 3 parts; Polyimide pulp, 5 parts; Carbon black , 30 parts, phenolic resin, 5 parts, aluminum oxide powder, 15 parts; dicumyl peroxide, 1.5 parts. The thermal insulation material prepared from the formula components has a tensile strength of 8.2MPa, an elongation at break of 172%, a linear ablation rate of 0.045mm / s, a mass ablation rate of 0.037g / s, and an oxygen index LOI value of 34 , Flame retardant grade V0, smoke density grade SDR is 20.8, absorption rate is 0.52% after soaking in nitrate ester for 4 weeks. Moreover, the vulcanization performance of the material is excellent, and the mixing process performance is excellent.

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Abstract

The invention discloses an anti-micromolecule migration, low-smoke flame-retardant ablation-resistant thermal insulation material and a preparation method thereof, and belongs to the technical field of ablation-resistant materials, wherein the defects that small molecules of an existing traditional flexible heat insulation material are prone to migration, and environmental friendliness is not achieved are overcome. The invention provides a novel elastomer-based thermal insulation material formula and a preparation method thereof. The formula comprises the following components in parts by weight: 100 parts of novel polyphosphazene elastomer; 3-5 parts of an activating agent; 0-15 parts of inorganic fiber; 0-20 parts of organic fiber; 15-35 parts of a reinforcing agent; 0-30 parts of a heat-resistant filler; 0-40 parts of an ablation-resistant filler; and 0.2-3 parts of a vulcanizing agent. Compared with traditional ethylene-propylene-diene monomer, butyronitrile and silicone rubber thermal insulation materials, the thermal insulation material provided by the invention has more excellent flame retardance, ablation resistance, interface adhesion and micromolecule migration resistance.

Description

technical field [0001] The invention belongs to the technical field of ablation-resistant materials, and in particular relates to a small-molecule migration-resistant, low-smoke, flame-retardant ablation-resistant thermal insulation material and a preparation method thereof. Background technique [0002] The thermal insulation layer is a type of thermal protection material located between the inner surface of the solid rocket motor combustion chamber casing and the propellant, which protects the casing from the ablation and erosion of the casing by the high temperature and high pressure environment generated by the propellant combustion chamber. With the development of contemporary aerospace and missile rockets in the direction of ultra-high-speed delivery, more stringent requirements are put forward for the overall performance of the engine, especially for thermal protection materials. [0003] The current flexible insulation materials are mainly nitrile rubber (NBR), ethyl...

Claims

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Application Information

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IPC IPC(8): C08L85/02C08L77/10C08L79/08C08L79/04C08L81/06C08L61/06C08K3/22C08K7/10C08K7/06C08K3/36
CPCC08L85/02C08K3/22C08K3/36C08L2201/02C08L2205/16C08K2003/222C08K2003/2296C08K2003/2227C08K2003/2244C08L77/10C08L79/08C08L79/04C08L81/06C08L61/06C08K7/10C08K7/06
Inventor 吴战鹏吴剑王连庆刘伟张双琨马翰林林红吉
Owner 北京瑞亚达科技有限公司
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