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Epoxy resin system compatible with liquid oxygen for prepregs and preparation method of epoxy resin system

A technology of epoxy resin system and liquid epoxy resin, which is applied in the field of epoxy resin system and its preparation, can solve the problems of restricting the development of composite fuel storage tanks, improve the compatibility of liquid oxygen, enhance the flame retardant effect, The effect of improving mechanical properties

Inactive Publication Date: 2020-08-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no epoxy resin matrix system that can meet the process requirements of hot melt prepreg and liquid oxygen compatibility requirements, which greatly limits the development of composite fuel storage tanks

Method used

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  • Epoxy resin system compatible with liquid oxygen for prepregs and preparation method of epoxy resin system
  • Epoxy resin system compatible with liquid oxygen for prepregs and preparation method of epoxy resin system
  • Epoxy resin system compatible with liquid oxygen for prepregs and preparation method of epoxy resin system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ①Mix 70 parts of TDE-85 and 5 parts of AG-80 and carry out vacuum distillation treatment, then heat it to 120°C, then add 25 parts of solid epoxy E20 and stir evenly;

[0037] ② Add 10 parts of organophosphorus flame retardant TAD to the above epoxy resin mixture and react at 140°C for 1 hour to obtain phosphorus flame retardant grafted epoxy resin;

[0038] ③Reduce the temperature of the above reaction product to 100°C, add 1 part of antioxidant XH-245, 5 parts of inorganic flame retardant 3.5 water zinc borate, and 8 parts of toughening agent polyurethane to the resin, stir and mix evenly, and carry out vacuum distillation treatment ;

[0039] ④At 100°C, add 33 parts of the curing agent diaminodiphenylsulfone that has been subjected to vacuum distillation to the above epoxy resin mixture, stir and mix evenly, and vacuumize to remove air bubbles;

[0040] ⑤ The above epoxy resin system is lowered to room temperature, and the obtained product can be used for the prepar...

Embodiment 2

[0043] ①Mix 70 parts of TDE-85 and 5 parts of AG-80 and carry out vacuum distillation treatment, then heat it to 120°C, then add 25 parts of solid epoxy E12 and stir evenly;

[0044] ② Add 10 parts of organophosphorus flame retardant TAD to the above epoxy resin mixture and react at 140°C for 1 hour to obtain phosphorus flame retardant grafted epoxy resin;

[0045] ③Reduce the temperature of the above reaction product to 110°C, add 5 parts of antioxidant BASF1010 and 5 parts of antioxidant BASF168, 10 parts of inorganic flame retardant magnesium hydroxide, and 8 parts of toughening agent polyurethane, add resin and mix, fully stir and mix evenly;

[0046] ④At 100°C, add 33 parts of curing agent diaminodiphenyl sulfone to the epoxy resin mixture after vacuum distillation, fully stir and mix evenly, and put the above mixed product into a vacuum oven for degassing treatment;

[0047] ⑤ The above epoxy resin system is lowered to room temperature, and the obtained product can be us...

Embodiment 3

[0050] ①Mix 70 parts of TDE-85 and 10 parts of AG-80 and carry out vacuum distillation treatment, then heat it to 110°C, then add 20 parts of solid epoxy E03, and stir evenly;

[0051] ② Add 10 parts of organophosphorus flame retardant TAD to the above epoxy resin mixture and react at 140°C for 1 hour to obtain phosphorus flame retardant grafted epoxy resin;

[0052] ③Reduce the temperature of the above reaction product to 100°C, add 5 parts of antioxidant XH-245, 5 parts of inorganic flame retardant boehmite, and 8 parts of toughening agent polyurethane into the resin and mix, fully stir and mix evenly;

[0053] ④At 100°C, add 35 parts of curing agent diaminodiphenyl sulfone to the epoxy resin mixture after vacuum distillation, fully stir and mix evenly, and put the above mixed product into a vacuum oven for degassing treatment;

[0054] ⑤ The above epoxy resin system is lowered to room temperature, and the obtained product can be used for the preparation of carbon fiber prep...

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Abstract

The invention provides an epoxy resin system compatible with liquid oxygen for prepregs and a preparation method of the epoxy resin system, and belongs to the field of resin material modification. Theepoxy resin system comprises the following components in parts by weight: 70-95 parts of multi-functional-group liquid epoxy resin, 5-30 parts of solid epoxy resin, 30-35 parts of a curing agent, 10-15 parts of an organic phosphorus flame retardant, 5-10 parts of an inorganic water-containing flame retardant, 1-10 parts of an antioxidant and 5-10 parts of a toughening agent. The multi-functional-group epoxy resin is selected as a resin body, the organic phosphorus flame retardant, the inorganic water-containing flame retardant and the antioxidant are introduced, and a reduced pressure distillation process is introduced in the preparation process, so that the liquid oxygen compatibility of the resin system is remarkably improved; and by introducing the solid epoxy resin and the tougheningagent, the viscosity and mechanical properties of the resin system are adjusted, and the requirements of a composite material liquid oxygen storage tank on the resin system for the prepreg process canbe met.

Description

technical field [0001] The invention relates to an epoxy resin system compatible with liquid oxygen and meeting the prepreg process and a preparation method thereof, belonging to the field of resin material modification. [0002] technical background [0003] The propellant fuel tank is an important structural part of the spacecraft, generally accounting for 30% to 50% of the net weight of the spacecraft, and plays a decisive role in the carrying capacity of the spacecraft. At present, aircraft fuel tanks are usually made of metal alloy materials. Relevant studies have shown that using carbon fiber composite materials instead of metal to prepare fuel tanks can reduce the weight of the tank by 20% to 50%, which will greatly improve the carrying capacity of the aircraft. [0004] Epoxy resin has the characteristics of good mechanical properties, high bonding strength, small curing shrinkage, high thermal stability, and good processability. It is one of the commonly used resin m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/02C08L75/04C08L81/06C08K13/04C08K7/06C08K3/38C08K5/5313C08K3/22C08J5/24C08G59/50C08G59/40
CPCC08J5/24C08G59/504C08G59/5026C08G59/4021C08J2363/00C08J2463/02C08J2475/04C08J2481/06C08K13/04C08K2003/387C08K5/5313C08K2003/2224C08K2003/2227C08K7/06
Inventor 李元庆谭迪龙俊飞史汉桥周自力黄培郭方亮孙宝岗付绍云
Owner CHONGQING UNIV
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