Title:
SHEET-TYPE INSULATING VARNISH, METHOD FOR MANUFACTURING SAME, ELECTRIC APPARATUS, AND ROTARY ELECTRIC MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/162068
Kind Code:
A1
Abstract:
A sheet-type insulating varnish (1) to be arranged in a gap between members to be insulated is obtained by forming a thermosetting resin composition into a sheet shape in an uncured or semi-cured state, the thermosetting resin composition comprising: a first thermosetting resin that is a solid at normal temperature; a second thermosetting resin that is a liquid at normal temperature; a latent curing agent that is reactively inactive at 60ºC or lower; and thermally expandable microcapsules (3) that have a maximum particle size that is smaller than the dimensions of the gap, have an average particle size that is smaller than 0.5 times the dimensions of the gap, and have a foaming start temperature of 60ºC or higher, with the thermosetting resin composition containing 10-90 parts by mass of the first thermosetting resin per 100 parts by mass of the total of the first thermosetting resin and the second thermosetting resin.
Inventors:
YASUDA NAOKI (JP)
NATORI SHIORI (JP)
NATORI SHIORI (JP)
Application Number:
PCT/JP2022/007498
Publication Date:
August 31, 2023
Filing Date:
February 24, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
C08L101/12; C08K7/22; C08K9/10; C08L63/00; H01B7/02; H01F5/06
Domestic Patent References:
| WO2021256390A1 | 2021-12-23 | |||
| WO2019102929A1 | 2019-05-31 | |||
| WO2008145190A1 | 2008-12-04 |
Foreign References:
| JP2015168687A | 2015-09-28 | |||
| JP2014225389A | 2014-12-04 | |||
| JP2016046061A | 2016-04-04 | |||
| JP2016081563A | 2016-05-16 | |||
| JP2013031252A | 2013-02-07 | |||
| JPH1180324A | 1999-03-26 | |||
| JP2006225544A | 2006-08-31 | |||
| JP2010261030A | 2010-11-18 | |||
| US20210351655A1 | 2021-11-11 |
Attorney, Agent or Firm:
PALMO PATENT FIRM, P.C. (JP)
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