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Low-cost mono-component rapidly-solidified liquid epoxy resin composition for fiber composite materials

A technology of liquid epoxy resin and fiber composite material, which is applied in the manufacturing field of carbon fiber composite material parts in the automobile industry, can solve problems such as long curing time, and achieve the effects of good heat resistance, reduced requirements and excellent heat resistance

Inactive Publication Date: 2017-04-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, UR300 and 2-ethyl-4-methylimidazole are respectively used as accelerators for ultrafine dicyandiamide, and the curing time is more than 4 hours, which is too long

Method used

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  • Low-cost mono-component rapidly-solidified liquid epoxy resin composition for fiber composite materials
  • Low-cost mono-component rapidly-solidified liquid epoxy resin composition for fiber composite materials

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh in parts by weight,

[0022] Resin:

[0023] NPEF-170 Bisphenol F epoxy resin 100 parts

[0024] NPEL-127 bisphenol A epoxy resin 30 parts

[0025] Hardener:

[0026] 1-cyanoethyl-2-methyl-4-ethylimidazole 4 parts

[0027] Thinner:

[0028] NPES-907 15 copies

[0029] Toughening agent:

[0030] Wuhan Longtu new material LT-EP toughening agent 2 parts

[0031] Preparation:

[0032] At room temperature, mix NPEL-170 bisphenol F epoxy resin, NPEF-127 bisphenol A epoxy resin, diluent NPES-907 and Wuhan Longtu new material LT-EP toughening agent according to the weight ratio and mix uniformly. Add the corresponding weight fraction of 1-cyanoethyl-2-methyl-4-ethylimidazole, and vacuum degas for 15 minutes while stirring. The curing condition of the epoxy resin is heating at 120°C for 15 minutes.

[0033] The main technical indicators of the epoxy resin composition before and after curing are as follows:

[0034] Through the differential thermal scanning analysis (DSC) test (from 20℃ to...

example 2

[0036] Weigh in parts by weight

[0037] Resin:

[0038] SM-128 Bisphenol A epoxy resin 20 parts

[0039] NPEL-127 80 copies

[0040] Hardener:

[0041] 2-ethyl-4-methylimidazole 5 parts

[0042] Thinner:

[0043] SYNASIA S-510 10 copies

[0044] Toughening agent:

[0045] Wuhan Longtu new material LT-EP toughening agent 2 parts

[0046] Preparation:

[0047] At room temperature, mix SM-128 bisphenol A epoxy resin, NPEL-127 bisphenol A epoxy resin, and Wuhan Longtu New Material LT-EP toughening agent evenly by weight ratio, and add the corresponding amount of 2 during the mixing process. -Ethyl-4-methylimidazole, and vacuum degassing for 15 minutes while stirring.

[0048] The main technical indicators of the one-component fast curing liquid molding epoxy resin prepared by the above method at 120°C are as follows:

[0049] Through the DSC test, the initial curing temperature is 103.4°C, the curing exotherm is 378.6J / g, and the curing time is 5 minutes at 120°C. Through the DSR test, the gel t...

example 3

[0051] Weigh in parts by weight

[0052] SM-128 bisphenol A epoxy resin 50 parts

[0053] NPEL-127 bisphenol A epoxy resin 30 parts

[0054] 1-cyanoethyl-2-methyl-4-ethylimidazole 4 parts

[0055] Thinner:

[0056] SYNASIA S-400 10 copies

[0057] Toughening agent:

[0058] Jiadida Chemical CTBN1300X13 toughening agent 2 parts

[0059] Preparation:

[0060] At room temperature, mix SM-128 bisphenol A epoxy resin, NPEL-127 bisphenol A epoxy resin, SYNASIA S-400, Jiadida Chemical CTBN1300X13 toughening agent according to the weight ratio, and the weight ratio during the mixing process Add 1-cyanoethyl-2-methyl-4-ethylimidazole and vacuum degas for 15 minutes while stirring.

[0061] The main technical indicators of the one-component fast curing liquid molding epoxy resin prepared by the above method at 120°C are as follows:

[0062] Through the DSC test, the initial curing temperature is 116.4°C, the curing exotherm is 385.6J / g, and the curing time is 3.7 minutes at 120°C. Passed the DSR test...

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Abstract

The invention provides a low-cost mono-component rapidly-solidified liquid epoxy resin composition. The low-cost mono-component rapidly-solidified liquid epoxy resin composition is used for solving the problems of the existing bicomponent rapidly-solidified epoxy resin that the bicomponent rapidly-solidified epoxy resin is required to be prepared when it is in need, the requirements on production facilities and processes are high, the heat resistance is poor, and the content of micromolecular volatiles is high. The resin composition is prepared from epoxy resin, an imidazole solidifying agent, a diluent and toughening particles. The epoxy resin composition obtained by adopting the technical scheme of the invention is of a mono-component system, and the shelf life is 3 months or more at the temperature of -18 DEG C and is 1 month or more in case of cold storage at the temperature of 4 DEG C. The solidifying time at the temperature of 120 DEG C is shorter than 15 minutes, the viscosity is lower than 200cps at the temperature of 60 DEG C, the operating time is longer than 2 hours, the glass transition temperature of a solidified substance is above 160 DEG C, the bending strength reaches 120MPa to 140MPa, and the fracture toughness K<IC> is greater than 0.8. The requirements of a liquid forming technology for high-performance fiber-reinforced polymer composite materials are met.

Description

Technical field [0001] The invention relates to a low-cost, one-component, fast-curing liquid epoxy resin composition and a preparation method of the composition, which is suitable for the matrix resin of fiber composite material liquid molding, and is especially suitable for the carbon fiber composite material parts of the automobile industry. manufacture. Background technique [0002] Under the background of global energy saving and emission reduction, lightweight is the development trend of the future automobile industry. Using advanced composite materials represented by carbon fiber reinforced epoxy resin to replace traditional metal materials is an effective way to reduce automobile weight. For the production of automotive carbon fiber reinforced epoxy resin composite parts, low-cost liquid molding processes are favored. In order to improve the production efficiency of the liquid molding process, the epoxy resin matrix is ​​required to have low viscosity at the processing t...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08G59/50
CPCC08L63/00C08G59/5073C08L2201/08C08L2205/025C08L2205/03
Inventor 王怡如刘万双韩博文魏毅邱夷平
Owner DONGHUA UNIV
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