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Epoxy resin composition for coil impregnation, method for producing coil product, and ignition coil

An epoxy resin and biphenyl type epoxy resin technology, which is applied in the field of ignition coils, can solve the problems of difficulty in increasing thermal conductivity, reducing thermal expansion coefficient, and deterioration of coil impregnation, and achieves excellent impregnation and high thermal conductivity. , the effect of high insulation breakdown voltage

Inactive Publication Date: 2018-07-13
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In general, crystalline silica is an effective filler for improving thermal conductivity, but on the other hand, in the case of adding crystalline silica, the thermal expansion coefficient value cannot be reduced, and the coil impregnation property deteriorates
In addition, for fused silica, if the addition amount is increased, the thermal expansion coefficient can be reduced, but it is difficult to increase the thermal conductivity

Method used

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  • Epoxy resin composition for coil impregnation, method for producing coil product, and ignition coil

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Embodiment

[0069] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by these examples.

[0070] The types and compounding amounts of the components described in the main ingredient column of Table 1 were put into a universal mixer heated to 130° C., and mixed under vacuum for 1 hour to prepare the main ingredient.

[0071] Next, the types and compounding amounts of the components described in the curing agent column of Table 1 were placed in a universal mixer heated to 60° C., and mixed under vacuum for 1 hour to prepare a curing agent.

[0072] 22 parts by mass of the above-mentioned curing agent were mixed with 100 parts by mass of the above-mentioned main agent with a universal mixer to prepare an epoxy resin composition for impregnating coils. In addition, the empty column in Table 1 shows that there is no compounding component.

[0073] The details of each component described in Table 1 used to prepare the...

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Abstract

An epoxy resin composition for coil impregnation contains (A) epoxy resin, (B) acid anhydride, (C) curing accelerator, and (D) spherical cristobalite.

Description

technical field [0001] The present invention relates to an epoxy resin composition for impregnating a coil, a method for producing a coil product, and an ignition coil. Background technique [0002] Conventionally, epoxy resin compositions for impregnation and casting (casting) have been used for insulation treatment of high-voltage transformers of electronic parts of automobiles and televisions, industrial modules, and the like. Among transformers for electronic devices in automobiles, ignition coils are manufactured by insulating them with epoxy resin compositions. In addition, for resin compositions for such applications, heat resistance is increasingly required in addition to crack resistance, electrical properties, and mechanical properties. In recent years, with the miniaturization of built-in components, the insulation distance has become narrower and narrower. At the same time, the requirements for the insulation reliability of impregnated epoxy resin compositions h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K7/18C08G59/42
CPCC08G59/4215C08K7/18C08K2201/003C08L63/00C08L2203/20C08L2205/025
Inventor 松本亮一吉田有一
Owner KYOCERA CORP
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