Electrical insulating resin composition for partial-discharge resistance

Patent metadata

Field	Value
Publication number	US-2018201804-A1
Application number	US-201615742853-A
Country	US
Kind code	A1
Filing date	Jul 7, 2016
Priority date	Jul 9, 2015
Publication date	Jul 19, 2018
Grant date	—

Abstract

An object of the present invention is to provide an improved partial discharge-resistant electrical insulating resin composition that can inhibit deterioration of an insulator due to partial discharge. The partial discharge-resistant electrical insulating resin composition of the present invention comprises boehmite alumina and a resin.

First claim

1 . A partial discharge-resistant electrical insulating resin composition comprising boehmite alumina and a resin.

2 . The partial discharge-resistant electrical insulating resin composition according to claim 1 , wherein the boehmite alumina is nanoparticles.

3 . The partial discharge-resistant electrical insulating resin composition according to claim 1 , wherein the resin is at least one resin selected from the group consisting of polyvinyl formal resin, polyurethane resin, polyamide resin, polyester resin, polyimide resin, polyamide-imide resin, polyetherimide resin, polyester-imide resin, and epoxy resin.

4 . The partial discharge-resistant electrical insulating resin composition according to claim 1 , wherein a content of the boehmite alumina is 0.1 to 60% by mass.

5 . The partial discharge-resistant electrical insulating resin composition according to claim 1 , which is resistant to an inverter surge.

6 . The partial discharge-resistant electrical insulating resin composition according to claim 1 , which is for use with an electrical apparatus in which inverter control is performed.

7 . An insulating varnish comprising the partial discharge-resistant electrical insulating resin composition according to claim 1 and a solvent.

8 . An electrodeposition paint comprising the partial discharge-resistant electrical insulating resin composition according to claim 1 and a solvent.

9 . A cured product formed from the partial discharge-resistant electrical insulating resin composition according to claim 1 .

10 . A method for producing the partial discharge-resistant electrical insulating resin composition according to claim 1 , comprising the steps of:
pre-gelling the boehmite alumina; and mixing the pre-gelled boehmite alumina with the resin.

11 . An electric wire comprising:
a conductor; and an insulating coating comprising a single layer or a plurality of layers formed on an outer periphery of the conductor, at least one layer of the insulating coating comprising the partial discharge-resistant electrical insulating resin composition according to claim 1 or a cured product thereof.

12 . A rotating electric machine comprising the electric wire according to claim 11 .

13 . An insulating film comprising an insulating layer comprising the partial discharge-resistant electrical insulating resin composition according to claim 1 or a cured product thereof.

14 . An insulating coating comprising an insulating layer comprising the partial discharge-resistant electrical insulating resin composition according to claim 1 or a cured product thereof.

Assignees

• Sumitomo Seika Chemicals
• Shizuoka Institute Of Science And Tech

Inventors

• Hayashizaka Noriyuki
• Kawasaki Kazunori
• Yamashita Masayuki
• Ebina Takeo
• Ishida Takahiro
• HATTORI Satomi

Classifications

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08K2003/2227

  of aluminium · CPC title

• H01B7/02

  Disposition of insulation · CPC title

• C09D177/10 Primary

  Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids · CPC title

• H01B3/002 Primary

  Inhomogeneous material in general · CPC title