Rapid-curing self-adhesive prepreg and preparation method thereof

A fast curing and self-adhesive technology, applied in the field of composite materials, can solve the problems of slow molding cycle and achieve fast molding cycle, excellent performance and good manufacturability

Inactive Publication Date: 2018-12-04
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Resin and prepreg systems such as M20 developed by foreign companies such as Hexcel can realize self-adhesive bonding of honeycombs, effectively avoiding the problems of increased weight and cost of parts caused by adhesive film bonding, but the curing cycle of materials is generally within More than 2 hours, the molding cycle is slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Epoxy resin mixture: bisphenol A epoxy resin E-51, 50 parts, glycidyl amine tetrafunctional epoxy resin AG-80, 20 parts; curing agent: polyaryletherketone as wall material, modified dicyandiamide Amine is the core material, 20 parts; toughening agent: hydroxyl-terminated liquid nitrile rubber (HTBN), 10 parts.

[0017] Add the epoxy resin mixture, curing agent, and toughening agent into the mixing equipment, mix well, control the temperature of the mixing equipment below 80°C, and mix for more than 1 hour. Pour off immediately and let cool.

[0018] The prepreg is prepared by the hot melt method. The set temperature of the film machine is 75°C, and the production speed of the film machine is 10m / min. The prepreg machine is used to compound the resin film and the carbon fiber fabric W3021, and the compound temperature is 75°C. The speed is 3m / min. The prepreg is cut and laid by an automatic blanking machine, cured and molded by a press at 130°C for 15 minutes, the mold...

Embodiment 2

[0020] Epoxy resin mixture: bisphenol A type epoxy resin E-54, 60 parts; glycidylamine trifunctional epoxy resin AFG-90, 15 parts; curing agent: polyaryletherketone as wall material, 1-cyanide Base-2-phenylimidazole as the core material, 15 parts; toughening agent: polyether ketone, 10 parts.

[0021] Crush the toughening agent to less than 100 mesh, add it to the epoxy resin mixture, mix evenly, add the curing agent, mix evenly, control the temperature of the mixing equipment below 80°C, and mix for more than 1 hour. Pour off immediately and let cool.

[0022] The prepreg is prepared by the hot melt method. The set temperature of the film machine is 70°C, and the production speed of the film machine is 9m / min. The prepreg machine is used to compound the resin film and the carbon fiber fabric W3021, and the compound temperature is 75°C. The speed is 2m / min. The prepreg is cut and laid by an automatic blanking machine, cured and molded by a press at 130°C for 15 minutes, and ...

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Abstract

The invention discloses a rapid-curing self-adhesive prepreg. The resin in the prepreg is self-adhesive fast-cured epoxy resin, and the resin in the prepreg comprises an epoxy resin mixture, a curingagent and a toughening agent, wherein the epoxy resin mixture accounts for 60-80% of the total weight of the resin, the curing agent uses a microcapsule fast curing agent and accounts for 10-30% of the total weight of the resin, the wall breaking temperature of the capsule is above 100 DEG C, and the toughening agent and other auxiliaries account for 10-20% of the weight of the resin. The prepregcan achieve self-adhesion and rapid solidification characteristics at the same time, meanwhile the prepreg is long in room temperature storage period, excellent in performance and fast in forming period. The prepreg can be used for high-efficiency and low-cost manufacturing of main bearing force and secondary bearing honeycomb sandwich wall plate structures such as aerospace.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a fast-curing self-adhesive prepreg and a preparation method thereof. Background technique [0002] High-performance prepregs and advanced composite materials have been widely used in aerospace and industrial fields. Epoxy resin composite materials, as the largest type of composite materials, have developed rapidly in recent years, and are gradually developing in the direction of multi-functionality and low cost. Among them, the biggest problems faced by composite materials in the fields of automobile and civil aviation are high cost and low production efficiency. At present, low-temperature curing and rapid curing are the main directions for the development of composite materials. Achieving rapid curing of epoxy resins requires resolving the critical conflict between rapid prototyping and room temperature storage. [0003] Prepreg is an important intermediate material of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L9/02C08L71/10C08J5/24C08J5/04
CPCC08J5/042C08J5/24C08J2363/00C08J2409/02C08J2463/00C08J2471/10
Inventor 李嘉张宝艳石峰晖杜宇闫鸿琛
Owner AVIC COMPOSITES
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