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Heat resistant epoxide resin and preparation method thereof

A technology of epoxy resin and novolac epoxy resin, which is applied in the field of epoxy resin and its preparation, can solve the problems of low shear strength of composite materials, and achieve the effects of low cost, good heat resistance and high application value

Inactive Publication Date: 2009-10-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing methods for improving the heat resistance of epoxy resins easily lead to low shear strength of composite materials; and provide a heat-resistant epoxy resin and a preparation method thereof

Method used

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Examples

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specific Embodiment approach 1

[0008] Embodiment 1: In this embodiment, the heat-resistant epoxy resin is made of diatomite, epoxy resin and curing agent; wherein the mass ratio of epoxy resin to curing agent is 15 to 35:8, and diatomite accounts for The total mass of thermal epoxy resin is 1%-10%, and the particle diameter of diatomite is 2-2.5 μm.

[0009] In this embodiment, the heat-resistant epoxy resin has good heat resistance and interface bonding performance; its thermal decomposition temperature has increased by more than 60°C compared with epoxy resin E51; the heat-resistant epoxy resin of the present invention is used to obtain carbon fiber reinforced The interfacial mechanical strength of epoxy composites increases by more than 17.0%.

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the diatomite has a particle size of 2.1-2.4 μm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the diatomite has a particle size of 2.3 μm. Others are the same as in the first embodiment.

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Abstract

The invention discloses a heat resistant epoxide resin and a preparation method thereof, relating to an epoxide resin and a preparation method thereof, and solving the problem that the existing method for improving the heat resistance of the epoxide resin easily results in low shearing strength of a composite material. The heat resistant epoxide resin is prepared by kieselguhr, epoxide resin and a curing agent. The method comprises the following steps of: 1. conducting ultrasonic treatment to prepare suspending liquid; 2. stirring the epoxide resin, adding the suspending liquid, raising and keeping temperature; and 3. adding the curing agent, conducting heating and solidifying, and then obtaining the heat resistant epoxide resin. The heat resistant epoxide resin has good heat resistance and interface adhesion property and the thermal degradation temperature of the heat resistant epoxide resin is improved by over 60 DEG C compared with epoxide resin E51. The interface mechanical strength of carbon fiber enhanced epoxide composite material is increased by over 17.0 percent. The method has simple technique and low cost.

Description

technical field [0001] The invention relates to an epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin has the advantages of high strength, excellent bonding performance, chemical stability, easy processing and low cost, and its polymer composite materials are widely used in many industrial fields. However, due to the high crosslinking density of pure epoxy resin after curing, there are disadvantages such as large internal stress, brittle cured substance, and poor heat resistance, which limit its application in fiber-reinforced composite materials. The interface layer plays an important role in the composite material. It is the transition layer connecting the reinforcement and the matrix, and it is also a bridge for transferring stress, so its structure and performance directly affect the performance of the composite material. As we all know, composite materials for aerospace should have high mechanical strength and good heat resistance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/04C08K3/34C08G59/18
Inventor 黄玉东徐丽薇刘丽张依帆
Owner HARBIN INST OF TECH
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