Self-adhesive flame-retardant epoxy resin and preparation method thereof

A technology of epoxy resin and phenolic epoxy resin, which is applied in the field of composite materials, can solve the problems of difficulty in meeting the requirements of the overall weight of the component, the reduction of the toughness and viscosity of the epoxy resin, and the decline of its own mechanical properties, and achieves moderate viscosity, toughness and The effect of improved adhesion and high flame retardancy

Inactive Publication Date: 2021-01-15
AVIC COMPOSITES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the addition of a large amount of inorganic fillers reduces the toughness and viscosity of the epoxy resin, which not only reduces its own mechanical properties, but also prepregs prepared with this resin often need to be re-prepared when the sandwich structure is prepared with the honeycomb interlayer. The introduction of other structural adhesive films for bonding makes the process of part preparation cumbersome, increases the overall weight of the part, and makes it difficult to meet the requirements for the overall weight of components in some fields

Method used

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  • Self-adhesive flame-retardant epoxy resin and preparation method thereof
  • Self-adhesive flame-retardant epoxy resin and preparation method thereof
  • Self-adhesive flame-retardant epoxy resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of self-adhesive flame-retardant epoxy resin, by weight, comprising the following steps:

[0030] (1) 50 parts of biphenyl type epoxy resin BPNE3501, 30 parts of o-cresol type phenolic resin JF45, 20 parts of bisphenol A epoxy resin E51, 10 parts of thermoplastic modified polyether ketone PEKC and 1 part The dispersant HYPER C100 was added to the reactor and heated and stirred. When the temperature rose to 110°C, the system was completely dissolved and evenly dissolved. After that, the heating and stirring was stopped to obtain a prepolymer, which was cooled for later use;

[0031] (2) Transfer the above prepolymer into a vacuum kneader for pre-stirring and mixing, and add 20 parts of melamine cyanurate (MCA) and 20 parts of hexaphenoxycyclotriphosphazene (HPCTP), and mix for 15 minutes , add 4 parts of dicyandiamide curing agent and 4 parts of organic urea accelerator UR300 in proportion, and continue stirring and mixing for 150 minutes to obtain a...

Embodiment 2

[0038] A preparation method of self-adhesive flame-retardant epoxy resin, by weight, comprising the following steps:

[0039] (1) 40 parts of CTBN modified epoxy resin HQ-3600, 40 parts of phenol formaldehyde epoxy resin SNE-625, 20 parts of triglycidyl isocyanurate (TGIC), 8 parts of thermoplastic polyethersulfone (PES), Add 2 parts of fumed silica as a dispersant, heat and stir in the reaction kettle, the temperature rises to 170°C and the system is completely dissolved, then stop heating and stirring to obtain a prepolymer, and cool it for later use.

[0040] (2) Transfer the above prepolymer into a vacuum kneader for pre-stirring and mixing, add 10 parts of melamine cyanurate (MCA), 20 parts of ammonium polyphosphate (APP), and 5 parts of magnesium hydroxide, and stir and mix After 10 minutes, add 30 parts of 4,4-diaminodiphenylmethane DDM and 5 parts of 2-ethyl-4-methylimidazole in proportion, and continue stirring and mixing for 10 minutes to obtain a predispersion, whic...

Embodiment 3

[0047] A preparation method of self-adhesive flame-retardant epoxy resin, by weight, comprising the following steps:

[0048] (1) 40 parts of biphenyl type epoxy resin YLE-4000S, 30 parts of CTBN modified epoxy resin HQ-3600, 30 parts of o-cresol type phenolic resin JF45, 3 parts of thermoplastic polyether ketone ketone PEKK, 1 part The dispersant HYPER C100 and 1 part of fumed silica were added, heated and stirred in a planetary disperser, and the temperature rose to 160°C. After the system was completely dissolved and uniform, the heating and stirring was stopped to obtain a prepolymer, which was cooled for later use.

[0049] (2) Transfer the above prepolymer into a vacuum kneader for pre-stirring and mixing, add 10 parts of melamine cyanurate (MCA), 20 parts of ammonium polyphosphate (APP), 10 parts of hexaphenoxycyclotriphosphorus Nitrile (HPCTP), after stirring for 10 minutes, add 5 parts of dicyandiamide and 3 parts of organic urea accelerator UR300 in proportion, and c...

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Abstract

The invention discloses self-adhesive flame-retardant epoxy resin, which is prepared from the following components: epoxy resin, a curing agent, an accelerant, a flame retardant, a dispersing agent and a toughening agent. The epoxy resin does not contain halogen, and a phosphorus element, a nitrogen element and a metal oxide contained in the epoxy resin generate a synergistic flame-retardant effect with novolac epoxy resin at a set ratio, so that condensed phase flame retardance and gas phase flame retardance are simultaneously carried out during combustion of the material, formation of a carbon layer on the surface of resin is promoted, inert gas is released to dilute combustible gas, free radicals are released at the same time to capture active groups in a combustion reaction, and the flame retardance of the resin is greatly improved. The prepreg / composite material prepared from the resin has excellent flame retardancy, and meets the requirements of DIN5510(S3), UL-94 (V-0), EN45545(HL3), TB / T 3237(A), CCAR25 and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a self-adhesive flame-retardant epoxy resin and a preparation method thereof. Background technique [0002] With the development of science and technology and the needs of people's daily life, fire safety has become an issue that people cannot ignore. Epoxy resins have poor flame retardancy and cannot meet the high fire safety requirements of aerospace, rail transit, ships and other industrial fields. It is difficult to be widely used in products that have strict requirements on flame retardancy. At present, 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. The prepregs used in composite materials are basically prepared by the solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/04C08L63/02C08K5/3492C08K5/5399C08K13/04C08K7/26C08K3/32C08K3/22B29B7/00C08J5/24
CPCC08L63/00C08L63/04B29B7/005C08J5/24C08L2201/02C08L2205/03C08L2205/02C08K2003/323C08K2003/2224C08K2003/327C08J2363/00C08J2463/00C08J2363/04C08J2463/04
Inventor 杜宇张宝艳李栓王婷婷李峰
Owner AVIC COMPOSITES
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