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Epoxy resin composition capable of being rapidly cured at medium and low temperatures, epoxy resin-based composite material and preparation method thereof

An epoxy resin and rapid curing technology, applied in the field of epoxy resin-based composite materials and their preparation, and epoxy resin compositions, can solve the problem of low glass transition temperature of epoxy resin matrix materials and production efficiency of epoxy resin composite materials Low, product mechanical properties decline and other issues, to achieve the best mechanical properties of the product, stable mechanical properties of the product, and increase the effect of resin content

Active Publication Date: 2021-08-24
北玻院(滕州)复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current technology, epoxy resin matrix materials generally have a high viscosity. When producing thick-walled products, increasing the pultrusion speed by conventional methods will easily lead to poor fiber impregnation inside the product, resulting in a decrease in the mechanical properties of the product, and even an increase in the scrap rate. Unnecessary waste is generated; and the glass transition temperature of the epoxy resin matrix material is low, the curing temperature is high, and the curing speed is slow at medium and low temperatures, so that the production efficiency of the epoxy resin composite material is low

Method used

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  • Epoxy resin composition capable of being rapidly cured at medium and low temperatures, epoxy resin-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] The epoxy resin composition of middle and low temperature rapid curing described in the present embodiment comprises the following components:

[0041]100 parts of epoxy resin, 1 part of imidazole accelerator 2-ethyl-4-methylimidazole, 10 parts of filler, 90 parts of anhydride curing agent methyl hexahydrophthalic anhydride, 10 parts of toughening agent o-phthalic anhydride Dioctyl dicarboxylate, 2 parts release agent calcium stearate. Wherein, the filler includes kaolin, asbestos powder, silica gel powder, and diphenylisodecyl phosphate in a mass ratio of 1:4:3:5.5.

[0042] The preparation method of the epoxy resin composition of medium and low temperature fast curing of the present embodiment specifically comprises the following steps:

[0043] S1. According to the selected mass fraction, add the filler, the toughening agent and the release agent to the epoxy resin, stir at a speed of 500-800r / min for 20-30min, and then increase the speed To 1000-1500r / min, stirrin...

Embodiment 2

[0049] The epoxy resin composition of middle and low temperature rapid curing described in the present embodiment comprises the following components:

[0050] 100 parts of epoxy resin, 1.5 parts of imidazole accelerator 2,4-dimethylimidazole, 10 parts of filler, 90 parts of anhydride curing agent methyl tetrahydrophthalic anhydride, 10 parts of toughening agent methyl tetrahydro Phthalic Anhydride, 2 parts Release Agent Magnesium Stearate. Wherein, the filler includes kaolin, asbestos powder, silica gel powder, and diphenylisodecyl phosphate with a mass ratio of 1:4.5:3.5:6.5.

[0051] The preparation method of the epoxy resin composition of medium and low temperature fast curing of the present embodiment specifically comprises the following steps:

[0052] S1. According to the selected mass fraction, add the filler, the toughening agent and the release agent to the epoxy resin, stir at a speed of 500-800r / min for 20-30min, and then increase the speed To 1000-1500r / min, stir...

Embodiment 3

[0058] The epoxy resin composition of middle and low temperature rapid curing described in the present embodiment comprises the following components:

[0059] 100 parts of epoxy resin, 2 parts of imidazole accelerator 2-methylimidazole, 10 parts of filler, 90 parts of anhydride curing agent 2-methylimidazole, 10 parts of toughening agent triphenyl phosphate, 2 parts of mold release agent Zinc fatty acid. Wherein, the filler includes calcined kaolin, asbestos powder, silica gel powder, and diphenylisodecyl phosphate with a mass ratio of 1:5:3.5:6.

[0060] The preparation method of the epoxy resin composition of medium and low temperature fast curing of the present embodiment specifically comprises the following steps:

[0061] S1. According to the selected mass fraction, add the filler, the toughening agent and the release agent to the epoxy resin, stir at a speed of 500-800r / min for 20-30min, and then increase the speed To 1000-1500r / min, stirring for 10-20min;

[0062] S2...

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Abstract

The invention provides an epoxy resin composition capable of being rapidly cured at medium and low temperatures, an epoxy resin-based composite material and a preparation method thereof. The epoxy resin composition capable of being rapidly cured at medium and low temperatures comprises the following components in parts by weight: 100 parts of epoxy resin, 0.1-5 parts of an imidazole accelerant, 2-40 parts of filler, 30-200 parts of an anhydride curing agent, 1-40 parts of a toughening agent and 0.5-10 parts of a release agent. According to the epoxy resin composition capable of being rapidly cured at medium and low temperatures, the epoxy resin-based composite material and the preparation method of the epoxy resin-based composite material, the medium and low temperature curing time of the epoxy resin-based composite material can be obviously shortened through cooperation of the anhydride curing agent, the imidazole accelerant and other raw materials in the epoxy resin composition; meanwhile, the pultrusion speed of the composite material in a pultrusion process is remarkably improved, and the composite material is excellent in mechanical property and high in glass transition temperature.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin-based composite materials, and in particular relates to a middle-low temperature fast-curing epoxy resin composition, an epoxy resin-based composite material and a preparation method thereof. Background technique [0002] Epoxy resin is an advanced composite resin matrix with excellent performance, especially in wear resistance, mechanical properties, adhesiveness, chemical stability, electrical insulation and adhesion to substrates, etc. It can be seen in fields such as chemical industry, construction, railway transportation and aerospace. Epoxy resin-based fiber-reinforced composite materials have excellent performance, light weight and high strength, and are suitable for various molding processes. The pultrusion molding process is to form and solidify the continuous fiber bundles, belts or cloth impregnated with resin glue under the action of traction through extrusion dies, and continuous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00
CPCC08K13/04C08K3/346C08K5/523C08K7/12C08K3/36C08K7/14C08G59/4223C08G59/686C08L2201/08C08L2201/02C08L63/00
Inventor 翟军明王淑霞陈锋张为军于航
Owner 北玻院(滕州)复合材料有限公司
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