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High-anti-scouring vitrified flame retardant resin and preparation method thereof

A technology of ceramic flame-retardant and ceramic materials, which is applied in the field of composite materials, can solve the problems of large impact on the curing process of the resin matrix, poor anti-scouring and shape-retaining effects, and insufficient density of ceramic materials, so as to improve thermal stability. And mechanical properties, good thermal stability, and the effect of improving the ceramic production rate

Active Publication Date: 2018-04-06
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramicable resin-based composites are a new type of thermal protection material, but such composite materials are usually physically added to the ablative resin matrix, and the compatibility between ceramicable materials and resins is generally poor. Moreover, the addition has a great influence on the curing process of the resin matrix, and the process operability is poor when forming complex components; The structure of the ceramic protective layer is loose, which eventually leads to the insufficient density of the ceramic material formed at ultra-high temperature, and the effect of anti-erosion and shape maintenance is poor, and the application of large area is limited to a certain extent

Method used

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  • High-anti-scouring vitrified flame retardant resin and preparation method thereof
  • High-anti-scouring vitrified flame retardant resin and preparation method thereof
  • High-anti-scouring vitrified flame retardant resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]

[0030] The preparation process is as follows:

[0031] 1) Weigh 10 parts of nitrile rubber toughening agent and 5 parts of POSS-based flame retardant, add them in batches to 100 parts of benzoxazine resin, stir evenly at room temperature until no agglomeration, and obtain mixture (1);

[0032] 2) Weigh 40 parts of polycarbosilane, add it to the above mixture (1), stir and mix evenly at 55°C to obtain mixture (2), and park until the temperature drops to room temperature;

[0033] 3) Weigh 1 part of phenol, add it to the above mixture (2), stir and mix evenly at room temperature, and obtain a high-scourability ceramizable flame-retardant resin.

[0034] A high-silicone / ceramizable benzoxazine prepreg is prepared by using the high-flush ceramizable flame-retardant resin prepared in the above steps through a hot-melt method. After the above prepreg was cut, it was reacted at 160°C for 5 hours, and solidified by molding process to obtain a test sample. The thermal dec...

Embodiment 2

[0036]

[0037]

[0038]The specific preparation method, prepreg preparation method, curing method and performance test of the composite material of the high-scouring ceramizable flame-retardant resin provided in this example are the same as those in Example 1. Decomposition temperature, oxygen index, bending strength at room temperature, interlaminar shear strength at room temperature, linear ablation rate, and residual carbon rate at 900 °C in air atmosphere are shown in Table 1.

Embodiment 3

[0040]

[0041] The specific preparation method, prepreg preparation method, curing method and performance test of the composite material of the high-scouring ceramizable flame-retardant resin provided in this example are the same as those in Example 1. Decomposition temperature, oxygen index, bending strength at room temperature, interlaminar shear strength at room temperature, linear ablation rate, and residual carbon rate at 900 °C in air atmosphere are shown in Table 1.

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Abstract

The invention provides high-anti-scouring vitrified flame retardant resin and a preparation method thereof. The high anti-scouring vitrified flame retardant resin comprises benzoxazine resin, a flameretardant, a vitrified material, a flexibilizer and an initiator, wherein the flame retardant and benzoxazine resin are in graft copolymerization to enhance the benzoxazine resin in molecular level soas to improve the heat stability and the mechanical property of the benzoxazine resin; and meanwhile, the flame retardant can be reacted with the vitrified material in a fused condition, so that formation of a ceramic layer is accelerated. The resin material is good in maintainability effect, has high anti-scouring, anti-ablating and flame retarding capacities, and can be widely applied to ablative coatings or external heat-preventing structures of guided missile bodies, rockets, spacecraft reentry cabins or ballistic missiles.

Description

technical field [0001] The invention relates to a highly erosion-resistant ceramizable flame-retardant resin and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] As a heat-resistant material, resin-based ablative materials are mainly used for missile body, outer surface of spacecraft re-entry cabin and inner surface of rocket engine, etc. Under the action of heat flow, this material can undergo physical and chemical changes such as decomposition, melting, evaporation, sublimation, and erosion. The mass loss on the surface of the material consumes a large amount of heat to protect the interior of the aircraft. [0003] On the other hand, with the increase of the flight speed of the aircraft, the ablation amount of ordinary ablative resin-based composite materials is too large in the high temperature environment, which cannot meet the requirements of the aerodynamic shape of the aircraft. At present, the comm...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08L83/04C08L83/16C08L9/02
CPCC08L79/04C08L2205/035C08L2205/05C08L2201/02C08L83/04C08L83/16C08L9/02
Inventor 李丽英刘爱军王国勇嵇培军王文宾
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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