A kind of impregnation resin for reinforcement of aramid honeycomb composite material and its application

A kind of aramid honeycomb, impregnating resin technology, applied in the field of resin, can solve the problem of low bonding strength of aramid honeycomb core, and achieve the effect of improving processability and operability, excellent curing performance and good mechanical performance

Inactive Publication Date: 2020-03-17
SICHUAN YUNTONG CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a kind of impregnation resin for reinforcement of aramid fiber honeycomb composite material, which combines bisphenol A epoxy resin and alicyclic epoxy resin, improves wettability and operability, and increases the combination with honeycomb core material At the same time, a modified low-temperature curing agent is added to improve temperature resistance and improve the problem that the existing curing agent is susceptible to moisture and cause crystallization, which solves the problem that the existing glass fiber or carbon fiber reinforced resin is cured at 50 °C. Core bond strength is not high, etc.

Method used

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  • A kind of impregnation resin for reinforcement of aramid honeycomb composite material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Accurately weigh 100g of bisphenol A epoxy resin E44, 300g of bisphenol A epoxy resin E51, 880g of diglycidyl tetrahydrophthalate, 12.4g of silicone-free foam-breaking polymer solution, The joint agent is 13g, the oily pigment is 2.56g, and the modified alicyclic amine curing agent is 400g. Stir and mix evenly to obtain the impregnating resin for reinforcing the aramid honeycomb composite material with a viscosity of 300mpa.s.

[0038] Take the density as 48kg / m 3 , the aramid honeycomb core material with a cell size of 2.75 is used as a sandwich layer, prepared by this embodiment to obtain impregnated resin coating, and three layers of 0.1mm twill glass cloth are laid on the upper and lower sides, the resin content is 50%-55%, and vacuumized 0.09MPa, the parts are cured at 50°C for 3h.

Embodiment 2

[0040] Accurately weigh 150g of bisphenol A epoxy resin E44, 320g of bisphenol A epoxy resin E54, 1645g of diglycidyl hexahydrophthalate, 5g of silicone-free foam-breaking polymer solution, titanate The coupling agent was 9g, the oily pigment was 0.94g, and the modified alicyclic amine curing agent was 240g. Stir and mix evenly to obtain an impregnating resin for reinforcing aramid honeycomb composite materials with a viscosity of 350mpa.s.

[0041] Take the density as 48kg / m 3 , the aramid honeycomb core material with a cell size of 2.75 is used as a sandwich layer, coated with the impregnated resin prepared in this example, and covered with three layers of 0.1mm twill glass cloth on the upper and lower sides, the resin content is 50%, and the vacuum is 0.09MPa , The parts were cured at 50°C for 3 hours.

Embodiment 3

[0043] Accurately weigh 320g of bisphenol F epoxy resin, 150g of diglycidyl 4,5-epoxycyclohexane-1,2-dicarboxylate, 510g of diglycidyl hexahydrophthalate, without silicone The foam-breaking polymer solution is 19.6g, the silane type coupling agent is 24.5g, the oily pigment is 2g, the modified alicyclic amine curing agent is 980g, stir and mix evenly, and the impregnating resin for aramid honeycomb composite material reinforcement has a viscosity of 280mpa.s.

[0044] Take the density as 48kg / m 3 , the aramid honeycomb core with a cell size of 2.75 is used as a sandwich layer, coated with the impregnated resin prepared in this example, and covered with 3 layers of 0.1mm twill glass cloth on the upper and lower sides, the content of the impregnated resin is about 50%, and the vacuum is 0.09 MPa, the parts are cured at 50°C for 3h.

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Abstract

The invention discloses impregnated resin for reinforcing an aramid honeycomb composite material and application of the impregnated resin. The impregnated resin comprises bisphenol A epoxy resin and alicyclic epoxy resin, wherein the mass ratio of the bisphenol A epoxy resin to the alicyclic epoxy resin is 1:(2-5). According to the technical scheme, the impregnating resin is used for bonding honeycomb core materials with glass fibers or carbon fibers, has good low viscosity, and is extremely good in wettability to the glass fibers or the carbon fibers; the bonding strength of the resin and thearamid honeycomb core materials is excellent; when the peel strength of a honeycomb board cylinder is tested, aramid honeycomb cores are damaged, the tg value is 85-95 DEG C after the aramid honeycomb core materials are completely cured at the temperature of 50 DEG C, the impregnated resin has good temperature resistance, and the process conditions of products are met, that is, the curing processis cured at low temperature; the products can meet the requirements of medium and low temperature application; the cost of a production mold is greatly reduced, and a metal mold with relatively highcost is replaced by a resin mold.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to impregnation for reinforcement of aramid honeycomb composite material and its application. Background technique [0002] With the rapid development of the aramid honeycomb industry, its application fields are also continuously expanding, and the aramid honeycomb composite material is a wide application field. After it is made into a sandwich structure, it has become a kind of The new structural material, because of its light weight, high strength, temperature resistance and flame retardancy, is suitable for the production and processing of composite products, and has attracted the attention of the material industry. [0003] However, when aramid honeycomb is combined with glass fiber or carbon fiber, it is required to have high bonding strength after curing at 50°C and require high temperature resistance for composite parts. However, after the existing glass fiber or carbon fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L77/10C08K7/14C08J5/04
Inventor 刘晓东徐江
Owner SICHUAN YUNTONG CHEM IND CO LTD
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