Polyamide-imide resin insulating varnish and insulated wire using the same

一种聚酰胺酰亚胺树脂、绝缘涂料的技术，应用在塑料/树脂/蜡绝缘体、绝缘体、有机绝缘子等方向，能够解决绝缘特性降低、实用性低等问题，达到低介电常数的效果

Active Publication Date: 2009-12-09
HITACHI MAGNET WIRE CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In the method of making the surface of the enameled wire conductive or semi-conductive, there are many problems that it is easy to cause damage during the winding process, so that the insulation characteristics are lowered, or the end part has to be insulated, and the practicability is low.

Method used

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  • Polyamide-imide resin insulating varnish and insulated wire using the same
  • Polyamide-imide resin insulating varnish and insulated wire using the same

Examples

Experimental program
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Effect test

Embodiment

[0056] Examples 1-7 and Comparative Examples 2-3 are the synthesis|combination of the polyamide-imide resin insulating paint which used the diamine component (aromatic diamine component), and implemented the synthesis of 2 stages as follows.

[0057] Prepare a flask equipped with a stirrer, a reflux condenser, a nitrogen gas introduction tube, and a thermometer, and as a synthesis reaction of the first stage, inject the diamine component, the acid component, and about 50 to The 80% solvent was heated to 180° C. in about 1 hour while stirring in a nitrogen atmosphere, and reacted at this temperature for 4 hours while discharging the water generated by the dehydration reaction to the outside of the system. After cooling to 60°C while maintaining the nitrogen atmosphere, add the diisocyanate component and the remaining solvent, and heat to 140°C for about 1 hour while stirring in the nitrogen atmosphere as the second-stage synthesis reaction. A polyamide-imide resin solution with...

Embodiment 1

[0073] In the first stage of synthesis, 184.5 g (0.45 moles) of BAPP, 10.0 g (0.05 moles) of 4,4'-DPE, 192.0 g (1.0 moles) of TMA, and 1000 g of NMP as a solvent were put in, and water Synthesis was carried out while discharging to the outside of the system. After cooling to 60°C while maintaining a nitrogen atmosphere, as the second stage of synthesis, 127.5 g (0.505 moles) of MDI as an aromatic diisocyanate component and 500 g of NMP as a solvent were put in and heated at 140°C. The synthesis was carried out under the following conditions, and a polyamide-imide resin insulating coating with a reduced viscosity of about 0.5 dl / g and a resin component concentration of about 25% by weight was obtained.

Embodiment 2

[0075]For the synthesis of the first stage, 143.0 g (0.35 moles) of BAPP, 30.0 g (0.15 moles) of 4,4'-DPE, 192.0 g (1.0 moles) of TMA, and 1000 g of NMP as a solvent were charged, and water was added at 180°C. Synthesis was carried out while exhausting the system, and after cooling to 60°C while maintaining a nitrogen atmosphere, as the second stage of synthesis, 127.5 g (0.505 moles) of MDI as an aromatic diisocyanate component and 450 g of NMP as a solvent were put in and heated at 140°C. The synthesis was carried out under the following conditions, and a polyamide-imide resin insulating coating with a reduced viscosity of about 0.5 dl / g and a resin component concentration of about 25% by weight was obtained.

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Abstract

This invention relates to a polyamide-imide resin insulating varnish and an insulated wire using the polyamide-imide resin insulating varnish. A polyamide-imide resin insulating varnish includes an aromatic diamine component, an aromatic diisocyanate component, an acid component including an aromatic tricarboxylic acid anhydride, and a solvent. The aromatic diamine component includes an aromatic diamine with three or more benzene rings and an aromatic diamine with two or less benzene rings. The polyamide-imide resin insulating varnish allows reduction in permittivity while retaining its heat resistance, mechanical performance, oil resistance etc. for producing a covering with a high partial discharge inception voltage.

Description

technical field [0001] The present invention relates to a polyamide-imide resin insulating paint, and in particular to a polyamide-imide resin insulating paint capable of obtaining a coating having a high partial discharge inception voltage, and an insulated wire using the same. Background technique [0002] In recent years, with the background of energy saving, hybrid electric vehicles have begun to spread. In order to improve fuel consumption and power performance, the engines used are driven by inverters, and are small, lightweight, highly heat-resistant, and high-voltage driven. is developing rapidly. [0003] The enameled wire currently used for this engine coil has both excellent heat resistance and mechanical properties that can withstand severe coil molding, or resistance to gearboxes in order to meet the requirements of engine performance such as small size, light weight, and high heat resistance. Oily polyamide-imide enameled wire becomes indispensable. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/25H01B3/30
CPCC09D179/08C08G18/6438C08G18/3243C08G18/346C08G18/324H01B3/305H01B3/306C08G18/345C08G73/14C08G18/3237
Inventor 菊池英行行森雄三本田佑树
Owner HITACHI MAGNET WIRE CORP
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