Electrical insulating epoxy resin composition and preparation method thereof

An epoxy resin and electrical insulation technology, applied in the field of materials, can solve the problems of reducing the electrical properties such as the breakdown strength of the epoxy resin, losing the mechanical properties of the epoxy resin system, affecting the casting process, etc., achieving excellent comprehensive performance and improving electrical properties. performance, the effect of improving the filling rate
CN104479294AActive Publication Date: 2015-04-01INST OF PROCESS ENG CHINESE ACAD OF SCI +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2015-04-01

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Abstract

The invention discloses an electrical insulating epoxy resin composition which consists of the following components: (A) one or more than two epoxy resins; (B) one or more than two anhydride curing agents; (C) a micron inorganic particle composition which accounts for 60-75% of the mass of the electrical insulating epoxy resin composition; and (D) one or more than two inorganic hollow nanoparticles which account for 0.05-0.8% of the mass percentage of the component (A), and the component (C) includes two particles differing in size. The epoxy resin composition disclosed by the invention is low in dielectric constant, and is capable of improving such electrical properties as breakdown strength and arc-resistance time as well as mechanical properties.
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Description

technical field

[0001] The invention belongs to the field of materials, in particular, the invention relates to an electrical insulating epoxy resin composition and a preparation method. Background technique

[0002] Epoxy insulating parts are widely used in power transmission and transformation equipment such as transformers, switches, transformers, wall bushings, etc. These insulating parts play the role of electrical insulation and load bearing, and their performance will directly affect the performance of power transmission and transformation equipment. Insulation performance and operational reliability. The current epoxy insulation is mainly based on the addition of micron-scale inorganic fillers, such as micron-scale alumina and silicon oxide. The addition of micron-scale inorganic fillers can make the shrinkage rate of the insulating part and the molding mold similar, and improve the mechanical and thermal properties of the epoxy resin, but it will reduce the electri...

Claims

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