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A latent halogen-free flame-retardant epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite material

A technology of epoxy resin curing and epoxy resin, which is applied in the fields of epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite materials, and can solve the problems of poor flame retardancy, short operation time of epoxy resin and its prepreg, etc. problems, to achieve the effect of improving the halogen-free flame retardancy, increasing the activation energy of the curing reaction, and reducing the impact

Active Publication Date: 2022-04-22
浙江百合航太复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the deficiencies in the prior art, and provides a latent halogen-free flame-retardant epoxy resin curing solution that solves the problems of short operating time and poor flame retardancy of the existing epoxy resin and its prepreg. agent, epoxy resin prepreg and carbon fiber composite

Method used

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  • A latent halogen-free flame-retardant epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite material
  • A latent halogen-free flame-retardant epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite material
  • A latent halogen-free flame-retardant epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0034] Experimental Example 1: Structural Characterization:

[0035] use 1 HNMR and element analysis characterize the structure of the latent halogen-free flame-retardant epoxy resin curing agent in the following examples.

[0036] Preparation of latent halogen-free flame retardant epoxy resin curing agent:

[0037] At room temperature and under the protection of nitrogen, add 1L of N-(3-aminopropyl)-imidazole and absolute ethanol mixture with a concentration of 0.1M in a container equipped with a reflux condensing device and a magnetic stirrer, stir well and then heat up to 60 ℃, then slowly add 0.5L of a mixture of p-hydroxybenzaldehyde and absolute ethanol with a concentration of 0.2M, and continue stirring for 4 hours;

[0038] After cooling to room temperature, 0.5 L of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and absolute ethanol were slowly added dropwise to the resulting mixture. The mixture was reacted at room temperature and under stirring conditi...

experiment example 3

[0063] Experimental Example 3: Glass transition temperature test:

[0064] Use a dynamic mechanical analyzer to test the glass transition temperature of the carbon fiber composite material in the following examples. The test adopts a single cantilever beam mode, the heating rate is 3°C / min, and the peak temperature of the loss tangent value-temperature curve is taken as the glass transition temperature.

[0065] Preparation of latent halogen-free flame retardant epoxy resin curing agent:

[0066] At room temperature and under the protection of nitrogen, add 1L of N-(3-aminopropyl)-imidazole and absolute ethanol mixture with a concentration of 0.2M in a container equipped with a reflux condensing device and a magnetic stirrer, stir well and then heat up to 60 ℃, then slowly add 1L of a 0.2M concentrated mixture of syringaldehyde and absolute ethanol, and continue stirring for 6 hours. After cooling to room temperature, slowly dropwise add 1L of 9,10-dihydro-9-oxa-10-phosphaph...

experiment example 4

[0077] Experimental example 4: Tensile performance test:

[0078] Using a universal mechanical testing machine, according to the ASTM D3039 test standard, the tensile properties of the carbon fiber composite materials in the following examples were tested.

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Abstract

The invention relates to a latent halogen-free flame-retardant epoxy resin curing agent, epoxy resin prepreg and carbon fiber composite material. The curing agent is prepared from phenolic hydroxyl-containing aromatic aldehyde, aminoimidazole and DOPO by a one-pot method. Since the epoxy curing agent contains large steric hindrance groups and phosphorus and nitrogen elements, it is used to cure epoxy resins, which can endow epoxy resins with excellent latent properties and halogen-free flame retardancy. The epoxy resin prepreg prepared by using the curing agent has a significantly extended pot life at normal temperature, and the carbon fiber composite material obtained after curing has excellent mechanical properties and flame retardancy.

Description

technical field [0001] The invention relates to an epoxy resin curing agent, an epoxy resin prepreg and a carbon fiber composite material, in particular to a latent halogen-free flame-retardant epoxy resin curing agent, an epoxy resin prepreg and a carbon fiber composite material, belonging to high field of molecular materials. Background technique [0002] As an important thermosetting polymer, epoxy resin is widely used in adhesives, coatings, electronic packaging and composite material manufacturing due to its excellent mechanical properties, bonding properties, dimensional stability, and chemical corrosion resistance. and other fields. For epoxy resin materials, the curing agent has an important influence on its physical properties and process performance. Among the many different types of epoxy resin curing agents, imidazole epoxy resin curing agents are widely used in the industry due to their wide curing temperature and the high heat resistance and high modulus of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/64C08J5/24C08L63/00
CPCC08G59/64C08J5/24C08J2363/00
Inventor 于亮亮刘万双魏毅杨波王熠钶
Owner 浙江百合航太复合材料有限公司
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