Curable epoxy composition for rotary electric machine
AssigneeDaicel Corporation
InventorTakuya Osaka
Life of this patent
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Abstract
Provided is a curable epoxy composition capable of forming a cured product having excellent heat resistance even in a high temperature environment. A first curable epoxy composition includes an alicyclic epoxy compound (A) having an alicyclic structure and an epoxy group in a molecule, an acid anhydride-based curing agent (B), and an imidazole-based curing accelerator (C), and is liquid at 25° C. and to be used for a rotary electric machine. A second curable epoxy composition includes an alicyclic epoxy compound (A) having an alicyclic structure and an epoxy group in a molecule, an acid anhydride-based curing agent (B), an imidazole-based curing accelerator (C), and a polyester polyol (D), and is to be used for a rotary electric machine.
Claims18
A curable epoxy composition for a rotary electric machine, the curable epoxy composition comprising:
- an alicyclic epoxy compound (A) having an alicyclic structure and an epoxy group in a molecule;
- an acid anhydride-based curing agent (B);
- an imidazole-based curing accelerator (C);
- and
- a polyester polyol (D) comprising one or more polyester polyols selected from the group consisting of polylactone polyols, aliphatic polyester polyols, and alicyclic polyester polyols;
- wherein a proportion of a content of the imidazole-based curing accelerator (C) in a curing accelerator content of the curable epoxy composition is 50% by mass or greater;
- and
- wherein when the curable epoxy composition is cured into a cured product, a glass transition temperature of the cured product is 200° C. or higher.
Dependencies are inferred from the claim text.