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Cyanate resin composition and application for preparing high modulus carbon fiber prepreg by hot-melt method thereof

A technology of cyanate ester resin and composition is applied in the field of preparation of high-modulus carbon fiber prepreg, which can solve the problems of rare reports on engineering applications, no cyanate ester resin matrix, etc., and achieves excellent performance, good longevity, Avoid the effects of high production costs

Inactive Publication Date: 2009-12-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past ten years, domestic research on the synthesis of cyanate resin has been vigorously developed, but so far there are few reports on engineering applications, and there is no special hot-melt impregnable cyanate resin matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] By weight, 70 parts of bisphenol A type cyanate resin (provided by Huifeng Technology Co., Ltd.) and 30 parts of E51 type epoxy resin (provided by Shanghai Resin Factory) are put in the reactor for prepolymerization, and the reaction temperature is 140 ℃. Track and measure the viscosity of the resin system in the reactor. When the viscosity of the prepolymerized resin reaches 1700mPa.s at 80°C, the polymerization reaction is stopped, and 300ppm of nickel acetylacetonate catalyst is added to the reaction kettle, stirred evenly, and set aside.

[0017] Inject the above cyanate resin composition into a prepreg tank at 90°C, fully impregnate the M40J high modulus carbon fiber, spread it in a mold coated with a release agent in the direction of 0°, close the mold, and set the temperature at 1°C / Raise the temperature from room temperature to 160°C at a heating rate of 1 min, keep it warm for 60 minutes, then raise the temperature to 180°C at a heating rate of 1°C / min, and p...

Embodiment 2

[0019] By weight, put 90 parts of bisphenol A type cyanate resin (provided by Huifeng Technology Co., Ltd.) and 10 parts of F46 type epoxy resin (provided by Shanghai Resin Factory) in the reactor for prepolymerization, and the reaction temperature is 140 ℃. Track and measure the viscosity of the resin system in the reactor. Stop the polymerization reaction when the viscosity of the resin at 80°C reaches 2000mPa.s, add 100ppm cobalt acetylacetonate catalyst into the reaction kettle, stir evenly, and set aside.

[0020] Inject the above cyanate resin composition into a prepreg tank at 100°C, fully impregnate the M40J high modulus carbon fiber, spread it in a mold coated with a release agent in the direction of 0°, close the mold, and set the temperature at 1°C / Raise the temperature from room temperature to 160°C at a heating rate of 1 min, keep it warm for 60 minutes, then raise the temperature to 180°C at a heating rate of 1°C / min, and pressurize to 5Kg / cm in the process 2 ...

Embodiment 3

[0022] By weight, 85 parts of dicyclopentadiene type cyanate ester resins (provided by Huifeng Technology Co., Ltd.) and 15 parts of F46 type epoxy resins (provided by Shanghai Resin Factory) are put in the reactor for prepolymerization, and the reaction temperature is 140°C. Track and measure the viscosity of the resin system in the reactor. When the viscosity of the prepolymerized resin reaches 1500mPa.s at 80°C, the polymerization reaction is stopped, and 200ppm of manganese acetylacetonate catalyst is added to the reaction kettle, stirred evenly, and set aside.

[0023] Inject the above cyanate resin composition into a prepreg tank at 85°C, fully impregnate the M40J high modulus carbon fiber, spread it in a mold coated with a release agent in the direction of 0°, close the mold, and set the temperature at 1°C / Raise the temperature from room temperature to 160°C at a heating rate of 1 min, keep it warm for 60 minutes, then raise the temperature to 180°C at a heating rate ...

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Abstract

The invention provides a cyanate resin composition comprising at least one 70-90wt% of cyanate or cyanate prepolymer, 30-10wt% of epoxy resin and 100-500ppm of catalyst. In addition, the invention provides a high modulus carbon fiber prepreg which is prepared by soaking the carbon fiber in the cyanate resin composition without solvent, the prepreg has good operability and long-life property at room temperature, and the mechanical property of the cyanate / high modulus carbon fiber composite material which is through the hot-press forming with a press or through the autoclave forming is greatly increased compared with that of the corresponding epoxy / high modulus carbon fiber.

Description

technical field [0001] The invention relates to a cyanate resin composition and its application in the preparation of high-modulus carbon fiber prepreg by hot-melt method, especially to provide the cyanate resin composition soaked without solvent to form high-modulus carbon fiber prepreg method of preparation. Background technique [0002] With the continuous development of modern satellite technology, the structural system of satellites has special requirements for the rigidity and thermal dimensional stability of structural parts. Therefore, reducing weight and improving rigidity and thermal dimensional stability have become the key factors to improve product performance. High-modulus carbon fiber-reinforced resin-based composites have the advantages of specific strength, high specific modulus, good dimensional stability, small thermal expansion coefficient, and good resistance to space environments. They are excellent new-generation structural candidate materials. Howeve...

Claims

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Application Information

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IPC IPC(8): C08G59/40C08J5/24C08L63/02C08L63/04C08K7/06
Inventor 王家樑王帆朱亚平庄元其焦扬声
Owner EAST CHINA UNIV OF SCI & TECH
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