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Fast-curing epoxy resin suitable for HP-RTM (high pressure-resin transfer molding) and preparation method

A HP-RTM, epoxy resin technology, applied in the field of composite materials, can solve the problems of poor weather resistance, increased resin viscosity, short resin pot life, etc., to increase the control difficulty, speed up the reaction speed, and overcome the effects of explosion

Inactive Publication Date: 2018-02-06
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the curing agent used for rapid curing of epoxy resin is mainly amine curing agent, but the polymer obtained by amine curing agent is relatively brittle, has poor weather resistance and has certain toxic effects.
In the prior art, it is generally used to modify the amine curing agent to reduce its toxicity, such as modified phenalkamine curing agent, modified aromatic amine, or compounding different amine curing agents to overcome the shortcomings of single use. A curing system with relatively good comprehensive performance can be obtained, such as the combination of modified alicyclic amine and phenalkamine, etc., but when it is added to epoxy resin, the viscosity of the resin at room temperature increases sharply, and the pot life of the resin is short, which affects the resin. Impregnation of fibers

Method used

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  • Fast-curing epoxy resin suitable for HP-RTM (high pressure-resin transfer molding) and preparation method
  • Fast-curing epoxy resin suitable for HP-RTM (high pressure-resin transfer molding) and preparation method
  • Fast-curing epoxy resin suitable for HP-RTM (high pressure-resin transfer molding) and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0033] Resin ratio

[0034] Bisphenol A type epoxy resin E-51

[0035]

[0036] The preparation process is as follows:

[0037] 1. Take a certain amount of bisphenol A epoxy resin E-51, nitrile rubber and diluent, stir under room temperature to obtain mixture (1);

[0038]2. Add a certain amount of modified imidazole and the modified cycloaliphatic amine prepared in Example 1 to the mixture (1), and stir at room temperature to obtain the mixture (2);

[0039] 3. Mix mixture (1) and mixture (2), and mix evenly at room temperature to obtain a low-viscosity fast-curing epoxy resin suitable for HP-RTM process.

[0040] The viscosity of the resin system at 40°C, the process pot life at 40°C, the curing cycle and the properties of the cast body are shown in Table 2.

Embodiment 8

[0042] Bisphenol A type epoxy resin E-51

[0043]

[0044] The preparation process is the same as in Example 7.

[0045] The properties of the resin system are shown in Table 2.

Embodiment 9

[0047] Bisphenol A type epoxy resin E-51

[0048]

[0049] The preparation process is the same as in Example 7.

[0050] The properties of the resin system are shown in Table 2.

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Abstract

The invention provides fast-curing epoxy resin suitable for HP-RTM (high pressure-resin transfer molding) and a preparation method. The fast-curing epoxy resin is prepared from low-viscosity epoxy resin, a diluent and a modified curing agent, wherein room-temperature viscosity of the low-viscosity epoxy resin is not higher than 2500 mPa.s, epoxy value of the low-viscosity epoxy resin is not lowerthan 0.6, room-temperature viscosity of the diluent is not higher than 100 mPa.s, and the use quantity of the modified curing agent is 5%-15% of the total mass of the epoxy resin. By means of reasonable selection and matching of modified imidazole and a special modified alicyclic amine curing system, the curing time is shorter and is only 5-10 min, besides, the curing reaction is stable, fast curing molding of a resin based composite material can be realized, production efficiency is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a fast-curing epoxy resin suitable for HP-RTM and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Lightweight technology is one of the key technologies for the development of the automobile industry, and advanced lightweight material technology is the basis and premise of automobile lightweight. The resin-based composite material with carbon fiber as reinforcement is a lightweight and high-strength material with many advantages such as high specific strength, high specific modulus, fatigue resistance, corrosion resistance, integral molding, etc., and is an ideal lightweight material for automobiles. But its low molding efficiency and high cost have become the bottleneck of its mass application in the automotive field. In order to realize the large-scale application of advanced resin matrix composites in the automotive field, the problems of molding efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/56
CPCC08G59/4014C08G59/5026C08G59/56
Inventor 李丽英刘爱军王国勇许孔力嵇培军
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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