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Medium-temperature fast-curing flame-retardant epoxy resin and preparation method thereof

An epoxy resin and rapid curing technology, which is applied in the field of composite materials, can solve the problem that phenolic resin-based flame-retardant composite materials cannot fully meet the requirements of advanced equipment mechanical properties and environmental safety performance, poor mechanical properties and process properties of phenolic resin, and produce A large amount of smoke or even toxic gas and other problems can achieve the effect of reducing product transportation and storage costs, excellent overall performance, and exempting from cold chain transportation

Inactive Publication Date: 2020-03-27
AVIC COMPOSITES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the resin-based composite materials with good flame retardancy are mainly phenolic-based composite materials, but phenolic resins have poor mechanical properties and process properties, and there are problems such as free phenol and formaldehyde released during the process or use.
At the same time, the prepregs used in phenolic resin-based composite materials are basically prepared by the solvent method, which causes great pollution to the environment, and the cost of solvent recovery and treatment is also high, and the storage period of the prepared phenolic prepregs is short (generally no more than one week). , requiring refrigerated transport and storage
The above reasons make it difficult for phenolic resin-based flame-retardant composite materials to fully meet the requirements of advanced equipment for mechanical properties and environmental safety performance.
[0004] Ordinary epoxy resin is flammable, and produces a large amount of smoke or even toxic gas, and has a high heat release rate. The composite material prepared by it does not have flame retardancy, and the safety of fire prevention and anti-virus is poor, which cannot meet the requirements of aerospace, rail transit, and ship. High fire safety requirements put forward by industrial fields such as

Method used

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  • Medium-temperature fast-curing flame-retardant epoxy resin and preparation method thereof
  • Medium-temperature fast-curing flame-retardant epoxy resin and preparation method thereof
  • Medium-temperature fast-curing flame-retardant epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The steps of preparing the medium-temperature fast-curing flame-retardant epoxy resin described in the method of the present invention are as follows:

[0042] Add 50 parts of bisphenol A epoxy resin E51, 50 parts of o-cresol type phenolic resin JF45, 5 parts of thermoplastic modified polyether ketone PEKC and 1 part of dispersant HYPER100C in the reactor, heat and stir, and the temperature rises When the system is completely dissolved at 150°C to 160°C, stop heating and stirring, and cool down for later use.

[0043] Transfer the above prepolymer into a planetary disperser or kneader for stirring and heating to 80°C~120°C, then add 20 parts of melamine cyanurate (MCA) and 20 parts of ammonium polyphosphate (APP), and stir for 10 minutes Finally, add 4 parts of dicyandiamide curing agent and 4 parts of modified accelerator NK-MD in proportion, control the temperature of the material system not to exceed 70°C, continue stirring and mixing for 5-20 minutes, and discharge ...

Embodiment 2

[0048] The steps of preparing the medium-temperature fast-curing flame-retardant epoxy resin described in the method of the present invention are as follows:

[0049]10 parts of bisphenol F epoxy resin 630, 40 parts of DOPO type liquid phosphorus epoxy resin SENP-6630, 30 parts of bisphenol A type novolac epoxy resin BPANE8200, 30 parts of phenol formaldehyde epoxy resin PXNE2000, 3 parts of Add thermoplastic polyimide ULTEM1000, 3 parts of thermoplastic polyethersulfone (PES), 1 part of dispersant HYPER100C, and 1 part of white carbon black 380, heat and stir in the reaction kettle, and the temperature rises to 150 ° C ~ 160 ° C system After completely dissolving evenly, stop heating and stirring, and cool down for later use.

[0050] Transfer the above prepolymer into a planetary disperser or kneader, stir and heat to 80°C~120°C, then add 10 parts of melamine cyanurate (MCA), 20 parts of ammonium polyphosphate (APP), 2 parts of three Antimony oxide, 10 parts of magnesium hy...

Embodiment 3

[0055] The steps of preparing the medium-temperature fast-curing flame-retardant epoxy resin described in the method of the present invention are as follows:

[0056] 10 parts of N,N-diglycidyl p-aminophenol glycidylamine AFG90, 40 parts of DOPO type liquid phosphorus-containing epoxy resin SENP-6630, 10 parts of DOPO-HQ type solid phosphorus-containing epoxy resin XEN-0230, 30 parts Bisphenol A type novolac epoxy resin BPANE8200, 30 parts o-cresol type novolac epoxy resin JF45, 2 parts thermoplastic polyphenylene ether SA9000, 3 parts thermoplastic polyether ketone ketone PEKK, 1 part dispersant HYPER100C, 1 part Parts of octaphenyloctasilsesquioxane (POSS) are added and heated and stirred during the reaction, the temperature rises to 150°C to 160°C and the system is completely dissolved and uniform, then the heating and stirring are stopped, and cooled for later use.

[0057] Transfer the above prepolymer into a planetary disperser or kneader, stir and heat to 80°C~120°C, th...

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Abstract

The invention relates to medium-temperature fast-curing flame-retardant epoxy resin and a preparation method thereof. The epoxy resin does not contain halogen. A phosphorus element, a nitrogen elementand a metal oxide contained in the resin generate a synergistic flame-retardant effect with the phenolic aldehyde-based epoxy resin under a set ratio so that condensed phase flame retardance and gasphase flame retardance are performed when the material is combusted. The prepreg / composite material prepared from the epoxy resin has excellent flame retardancy and meets the requirements of DIN5510 (S4 / ST2 / SR2), UL-94 (V-0), EN45545 (HL3), TB / T 3237 (A), FAR25, CCAR and the like.

Description

technical field [0001] The invention relates to a medium-temperature fast-curing flame-retardant epoxy resin and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Epoxy resin and its continuous fiber reinforced prepreg / composite materials have the characteristics of good manufacturability, excellent mechanical properties, light weight and high strength, and have been widely used in aviation, aerospace, weapons, ships, construction and transportation. . [0003] With the development of equipment, the requirements for composite materials are getting higher and higher, and structural-functional composite materials have become an important development direction of composite materials. At present, resin-based composites with good flame retardancy are mainly phenolic-based composites, but phenolic resins have poor mechanical and process properties, and free phenol and formaldehyde are released during the process o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/06C08K13/04C08K7/26C08K5/3492C08K3/32C08K3/22C08K5/523C08K13/02C08K5/526C08K5/5333C08G59/50
CPCC08L63/00C08G59/5073C08L2201/02C08L2201/22C08L2201/08C08L2205/03C08L2205/025C08L2205/035C08K2003/323C08K2003/327C08K2003/2224C08L61/06C08K5/34928C08K3/32C08K13/04C08K7/26C08K3/2279C08K3/22C08K5/523C08K13/02C08K5/526C08K5/5333
Inventor 张宝艳杜宇李嘉王婷婷石峰晖霍红宇李峰
Owner AVIC COMPOSITES
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