Preparation method of modified cyanate ester resin with low volatility

A cyanate ester resin and low volatility technology, which is applied in the field of polymer material preparation, can solve the problems of low volatility, reduced heat resistance, and great influence on satellite imaging systems, and achieve the effect of high glass transition temperature and large molecular weight

Pending Publication Date: 2020-04-14
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention solves the problem that the existing epoxy resin-modified cyanate resin can condense volatiles and have a higher mass loss in the space high-vacuum environment, which has a greater impact on the satellite imaging system, and the epoxy resin-modified cyanate resin The problem of reducing its heat resistance provides a method for preparing a modified cyanate resin with low volatility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Heat and melt 100g of cyanate resin and 5g of phenolphthalein polyethersulfone at 170°C, stir vigorously for 30min, and the resin mixture becomes uniform and transparent.

[0021] Then cool the above resin mixture to 130°C, then add 30g of polyimide and 0.3g of aluminum acetylacetonate curing catalyst, continue to stir vigorously for 90min, the resin mixture becomes transparent and homogeneous again, remove air bubbles under vacuum at 100°C for 60min ,

[0022] Finally, segmental curing, first at 170°C for 1 hour, then at 200°C for 1 hour, and finally at 230°C for 1 hour, to obtain a low-volatility cyanate resin.

[0023] In the above experiments, the cyanate resin was bisphenol A cyanate resin, the polyimide was produced by DuPont, and the phenolphthalein polyethersulfone was produced by Xuzhou Engineering Plastics Factory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.

[0024] The condensable volatile matter of the low volatility modified cya...

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Abstract

The invention discloses a preparation method of a modified cyanate ester resin with low volatility, and belongs to the technical field of preparation of high polymer materials. In the prior art, the condensable volatile matter loss and the mass loss of the existing epoxy resin toughened and modified cyanate ester resin in a space high-vacuum environment are high so as to highly affect a satelliteimaging system, and the heat resistance of the epoxy resin toughened and modified cyanate ester resin can be reduced. A purpose of the invention is to solve the problems in the prior art. According tothe invention, phenolphthalein polyethersulfone containing a benzene ring structure and a polyimide thermoplastic resin with a high glass transition temperature are selected to modify a cyanate esterresin to obtain the modified cyanate ester resin with low volatility, and the heat resistance of the resin is equivalent to the heat resistance of the cyanate ester resin body; and the modified cyanate ester obtained by the preparation method has the characteristics of good processing technology, excellent heat resistance, low volatility and the like, can meet the actual requirements of use of asatellite optical imaging system in an extreme environment, and can be widely applied to a light shield and an optical machine structural member of a satellite optical remote sensing system.

Description

technical field [0001] The invention relates to a method for preparing a modified cyanate ester resin with low volatility, and belongs to the technical field of polymer material preparation. Background technique [0002] Due to its excellent dielectric properties, mechanical properties, and low outgassing properties, cyanate ester resins are more and more widely used in the aerospace field, such as satellite sunshades and shipboard radar radomes. However, because cyanate resin has a highly symmetrical triazine ring structure and high crystallinity, its cured product is too rigid, brittle and insufficient in toughness, which limits the application of cyanate resin in a wide range of applications. [0003] At present, the ways to modify cyanate resin mainly include the copolymerization modification of thermosetting resin and the blending modification of thermoplastic resin. However, epoxy resin is generally used for copolymerization modification, but due to the high brittlene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L81/06C08L79/08
CPCC08L79/04C08L2201/08C08L2205/02C08L2205/03C08L2205/04C08L2205/22C08L81/06C08L79/08
Inventor 秦伟康红军吴晓宏卢松涛李杨
Owner HARBIN INST OF TECH
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