Insulated wire

Patent metadata

Field	Value
Publication number	US-10818408-B2
Application number	US-201816058129-A
Country	US
Kind code	B2
Filing date	Aug 8, 2018
Priority date	Aug 28, 2017
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

An insulated wire has a conductor, and an insulating film including a first insulating layer covering the conductor and a second insulating layer covering the first insulating layer. The second insulating layer contains a polyimide or a polyamideimide as a main component. The first insulating layer contains a reaction product of a carboxylic acid dianhydride and a diamine as an adhesive component and a component that is the same as the main component in the second insulating layer. At least one of the carboxylic acid dianhydride and the diamine has a carbonyl group.

First claim

What is claimed is:

1. An insulated wire comprising:
a conductor; and
an insulating film including a first insulating layer that covers the conductor; and a second insulating layer that covers the first insulating layer,
wherein the second insulating layer contains a polyimide or a polyamideimide as a main component;
the first insulating layer contains (1) a reaction product of a carboxylic acid dianhydride and a diamine as an adhesive component and (2) a predetermined component that is the same as the main component in the second insulating layer; and
at least one of the carboxylic acid dianhydride and the diamine has a carbonyl group.

2. The insulated wire according to claim 1 , wherein a proportion of the polyimide or polyamideimide in the second insulating layer is 50% by weight or more.

3. The insulated wire according to claim 2 , wherein the proportion of the polyimide in the second insulating layer is 50% by weight or more.

4. The insulated wire according to claim 1 , wherein:
the carboxylic acid dianhydride is 4,4′-carbonyldiphthalic anhydride represented by the following Formula I; and
the diamine is 2,2-bis[4-(4-aminophenoxy)phenyl]propane represented by the following Formula II.

5. The insulated wire according to claim 1 , wherein the first insulating layer contains the adhesive component at a proportion of 0.5 mol % to 5 mol % when a content of the predetermined component is designated as 100 mol %.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hirayama Shinichiro
• Yamada Takashi
• Yamazaki Hikohito

Classifications

• C08G73/1071

  Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain · CPC title

• C08G73/105

  with oxygen only in the diamino moiety · CPC title

• C09D179/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• H01B3/305

  Polyamides or polyesteramides · CPC title

• C09D177/10

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