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Electric insulating epoxy resin composition, preparation method and use of composition

An epoxy resin and electrical insulation technology, applied in the field of materials, can solve the problems of improving the volume resistivity of epoxy insulating materials, affecting processability, and emphasizing, etc.

Active Publication Date: 2014-04-02
INST OF PROCESS ENG CHINESE ACAD OF SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the epoxy insulating parts running on the hanging net are mainly formed by mixing and curing epoxy resin, curing agent and filler, and its volume resistivity is low, at 10 13～15 Ω·cm level, the voltage level of the application transmission network is below 1000kV, which can no longer meet the application requirements of the DC UHV transmission network above 1000kV
At present, there are also many reports on modified insulating epoxy resin compositions at home and abroad. For example, foreign WO2006008422A1 reports the use of micron-scale fillers and nano-scale fillers to prepare insulating epoxy resins. Single-component nanoparticles and microparticles are simply compounded, and the viscosity of the material is too high, which affects the processability
CN101816049A discloses an epoxy resin for insulation prepared by partially pretreated micron-scale fillers, which focuses on the breakdown strength of the material, and CN101506301A discloses an epoxy resin for insulation prepared by using micron fillers, nanofillers, and elastomer particles as mixed fillers material, which focuses on improving the dendification resistance of the material, and there is no report on improving the volume resistivity of the epoxy insulating material in the above-mentioned prior art

Method used

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  • Electric insulating epoxy resin composition, preparation method and use of composition
  • Electric insulating epoxy resin composition, preparation method and use of composition
  • Electric insulating epoxy resin composition, preparation method and use of composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0083]According to Table 1, the components of the formula amount are mixed evenly by the high-speed disperser DISPERMAT of VMA-Getzmann Company at 120-150 ° C to form an epoxy casting formula. After vacuum degassing, pour it into a preheated mold. Curing and molding at 105-150° C. to obtain Examples 1-5 of electrical insulating epoxy resin compositions.

[0084] Nanoscale and submicron α-Al adopted in the embodiment 1-5 of the present invention 2 o 3 The purity is ≥99.9%, and the sphericity is greater than or equal to 0.85.

[0085] The micronano α-Al that adopts in the embodiment 1-5 of the present invention 2 o 3 All have been surface treated, and the surface treatment agent is γ-glycidoxypropyltrimethoxysilane.

[0086] The composition and mass ratio of Component A epoxy resin of Example 1-5 of the present invention are CT200:CY179:CY5995=4:3:3

[0087] The composition and mass ratio of component B curing agent of Example 1-5 of the present invention are B-570:HY1235:P...

Embodiment 6-8

[0106] According to Table 5, the components of the formula amount are mixed evenly by the high-speed disperser DISPERMAT of VMA-Getzmann Company at 120-150 °C to form an epoxy casting formula. After vacuum degassing, pour it into a preheated mold. Curing and molding at 105-150° C. to obtain Examples 6-8 of electrical insulating epoxy resin compositions.

[0107] Nanoscale and submicron-scale α-Al adopted in the embodiment 6-8 of the present invention 2 o 3 The purity is ≥99.9%, and the sphericity is greater than or equal to 0.85.

[0108] The micro-nano particles used in Examples 6-8 of the present invention are all surface-treated, and the surface treatment agent is γ-glycidoxypropyltrimethoxysilane

[0109] The composition and mass ratio of the component A epoxy resin in Examples 6-8 of the present invention are CT200:CT5532:CY5995=2:1:1.

[0110] The composition and mass ratio of component B curing agent of Example 6-8 of the present invention are B-570:HY5996:PAPA=9:2:1...

Embodiment 9～12

[0118] According to Table 7, the components of the formula amount are mixed evenly by the high-speed disperser DISPERMAT of VMA-Getzmann Company at 120-150 ° C to form an epoxy casting formula. After vacuum degassing, pour it into a preheated mold. Curing and molding at 105-150°C to obtain an electrical insulating epoxy resin composition.

[0119] The composition and mass ratio of the component A epoxy resin in Examples 9-12 of the present invention are CT200:CY179:CY5995=3:1:1.

[0120] The composition and mass ratio of the component B curing agent of Examples 9-12 of the present invention are B-570:HY5996:PAPA=8:2:1.

[0121] The micronano α-Al that adopts in the embodiment 9-12 of the present invention 2 o 3 The purity is ≥99.9%, and the sphericity is greater than or equal to 0.85.

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PUM

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Abstract

The invention discloses an electric insulating epoxy resin composition which comprises the following components: (A) a mixture of at least two epoxy resins; (B) a mixture of at least two anhydride curing agents; and (C) a micro-nano inorganic particle composition, wherein the micro-nano inorganic particle composition accounts for 63-73wt% of the electric insulating epoxy resin composition. The electric insulating epoxy resin composition disclosed by the invention has high volume resistivity and meanwhile has excellent electric performances such as breakdown strength, heat resistance, mechanical property and machinable property, so that the composition can be used for preparing insulating parts in electric transmission and transformation equipment of a power grid, and is particularly used for preparing insulating parts in electric transmission and transformation equipment of a direct current ultra-high voltage grid.

Description

technical field [0001] The invention belongs to the field of materials, in particular, the invention relates to an electrical insulating epoxy resin composition. Background technique [0002] There are many insulating parts used in power transmission and transformation equipment such as transformers, switches, transformers, wall bushings, etc., especially epoxy insulating parts. These insulating parts play the role of electrical insulation and load bearing. Performance will directly determine the insulation performance and operational reliability of power transmission and transformation equipment. With the development of my country's power system towards ultra-high voltage, direct current, and high-current transmission networks, higher requirements are placed on the performance of insulating parts. Compared with AC voltage, DC UHV will cause long-term accumulation of electric charge on the surface of insulating parts, induce flashover along the surface, cause breakdown fail...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/02C08L63/04C08G59/42C08K9/06C08K3/22C08K3/36C08K3/38C08K3/28C08K3/34
Inventor 王好盛张冬海武晓峰陈赟陈运法高锋张晖张忠张翀陈新田浩郝留成
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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