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Epoxy resin composite material and preparation method thereof

An epoxy resin and composite material technology, which is applied in the field of insulating packaging materials, can solve the problems of high crack resistance requirements, complex operating conditions of high-frequency transformers, and increased viscosity.

Pending Publication Date: 2021-01-26
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are still the following problems in the popularization and application of the full epoxy solidification process in high-frequency transformers: the operating conditions of high-frequency transformers are complex, and insulating materials are required to meet the requirements of durability, heat resistance, mechanical properties, etc., especially There is a high requirement for crack resistance
It can be found that the isocyanate in the two segments of the diblock copolymer reacts with the hydroxyl groups in the two epoxy molecules respectively to form a crosslink, which will lead to an increase in viscosity and cause great difficulties in the casting process.

Method used

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  • Epoxy resin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The epoxy resin composite material that present embodiment provides, its preparation method comprises:

[0029] 1) Preparation of monohydroxy polyether alcohol grafted epoxy resin

[0030] Take 10 parts by mass of toluene diisocyanate (TDI), 0.01 parts by mass of dibutyltin dilaurate and 10 parts by mass of polyethylene glycol monomethyl ether-550, and add them to 450 parts by mass of tetrahydrofuran (THF), mix well, and heat at 60°C React for 4 hours, then add 10 parts by mass of bisphenol A type epoxy resin (epoxy value 0.54), mix well, continue to react for 4 hours, remove the solvent, and obtain monohydroxy polyether alcohol grafted epoxy resin.

[0031] 2) Preparation of epoxy resin composite materials

[0032] In the preheated mold, add 2.5 mass parts of monohydroxy polyether alcohol grafted epoxy resin and 100 mass parts of bisphenol A type epoxy resin, 100 mass parts of hexahydrophthalic anhydride curing agent and 1 Accelerator benzyldimethylamine (BDMA) of ma...

Embodiment 2

[0034] The epoxy resin composite material that present embodiment provides, its preparation method comprises:

[0035] 1) Preparation of monohydroxy polyether alcohol grafted epoxy resin

[0036] Take 15 parts by mass of toluene diisocyanate (TDI), 0.02 parts by mass of dibutyltin dilaurate and 12 parts by mass of polyethylene glycol monomethyl ether-550, and add them to 460 parts by mass of tetrahydrofuran (THF), mix well, and heat at 60°C React for 4 hours, then add 15 parts by mass of bisphenol A type epoxy resin (epoxy value 0.54), mix well, continue to react for 4 hours, remove the solvent, and obtain monohydroxy polyether alcohol grafted epoxy resin.

[0037] 2) Preparation of epoxy resin composite material

[0038] In the preheated mold, add 5 mass parts of monohydroxy polyether alcohol grafted epoxy resin and 100 mass parts of bisphenol A type epoxy resin, 60 mass parts of hexahydrophthalic anhydride curing agent and 1 Accelerator benzyl dimethylamine (BDMA) of mass ...

Embodiment 3

[0040] The epoxy resin composite material that present embodiment provides, its preparation method comprises:

[0041] 1) Preparation of monohydroxy polyether alcohol grafted epoxy resin

[0042] Take 15 parts by mass of toluene diisocyanate (TDI), 0.03 parts by mass of dibutyltin dilaurate and 14 parts by mass of polyethylene glycol monomethyl ether-550 and add them to 480 parts by mass of tetrahydrofuran (THF), mix well, and put React for 4 hours, then add 25 parts by mass of bisphenol A type epoxy resin (epoxy value 0.54), mix well, continue to react for 4 hours, remove the solvent, and obtain monohydroxy polyether alcohol grafted epoxy resin.

[0043] 2) Preparation of epoxy resin composite material

[0044] Get 8 mass parts of monohydroxypolyether alcohol grafted epoxy resin and 100 mass parts of bisphenol A type epoxy resin, 80 mass parts of hexahydrophthalic anhydride curing agent and 1 mass part of accelerator benzyl Dimethylamine (BDMA) was mixed and heated to 100°C...

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Abstract

The invention provides an epoxy resin composite material and a preparation method thereof. The epoxy resin composite material is prepared from, by mass, 2.5-10 parts of monohydroxy polyether alcohol grafted epoxy resin, 100 parts of epoxy resin, 60-100 parts of curing agent and 1 part of accelerant. According to the invention, the tensile strength of the epoxy resin composite material prepared through the method reaches up to 85 MPa, the bending strength reaches 135 MPa, and cracking is still avoided when the temperature is reduced to -60 DEG C, so that the packaging requirement of electricalequipment such as a high-frequency transformer and the like is greatly met, and the preparation method provided by the invention is simple, reliable and suitable for large-scale production.

Description

technical field [0001] The invention relates to an insulating packaging material, in particular to an epoxy resin composite material and a preparation method thereof. Background technique [0002] With the widespread access of DC power sources such as distributed power sources, new energy storage devices, fuel cells, and microgrids, and the wide application of DC loads such as electric vehicles, data centers, computers, and urban rail transit, the traditional distribution network needs to be equipped with AC power at the same time. , DC power supply access and AC / DC load power supply capabilities; on the other hand, the promotion of distributed power generation technology has expanded the traditional power distribution system from a single power supply form to a power generation function, resulting in energy from traditional sources, The one-way flow of grid and load, and the development of two-way flow, which requires the distribution network to have regional energy coordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L87/00
CPCC08L63/00C08L87/005
Inventor 王琨杨威陈赟尹立颜丙越
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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