Title:
ADHESIVE COMPOSITION FOR LAMINATING ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/270154
Kind Code:
A1
Abstract:
The objective of the present invention is to provide an adhesive composition for laminating an electrical steel sheet, the adhesive composition having excellent tack-free properties before being manufactured as a laminated electrical steel sheet, and having excellent adhesive performance even after being stored for a long period of time, wherein an adhesive cured product obtained from the adhesive composition has excellent toughness within a wide temperature range. The present invention is an adhesive composition for laminating an electrical steel sheet, the adhesive composition containing: an epoxy resin (AA) including an epoxy resin (A) that has at least 3 epoxy groups in one molecule; a phenoxy resin (B) having a glass transition temperature of more than 120 °C in an uncured state, as measured by differential scanning calorimetry; and an amine-based latent curing agent (C), wherein the epoxy resin (A) contains an epoxy resin having a softening temperature of at least 60 °C, and the content of the phenoxy resin (B) is 20-80 parts by mass with respect to 100 parts by mass of the epoxy resin (AA), and the adhesive cured product obtained from the adhesive composition has a glass transition temperature of more than 160 °C as measured by differential scanning calorimetry.
More Like This:
Inventors:
ISHIKAWA KAZUNORI (JP)
ITO TSUBASA (JP)
ARAMAKI TAKASHI (JP)
OISHI HIROSHI (JP)
ITO TSUBASA (JP)
ARAMAKI TAKASHI (JP)
OISHI HIROSHI (JP)
Application Number:
PCT/JP2022/019251
Publication Date:
December 29, 2022
Filing Date:
April 28, 2022
Export Citation:
Assignee:
SIKA HAMATITE CO LTD (JP)
NIPPON STEEL CORP (JP)
NIPPON STEEL CORP (JP)
International Classes:
C09J11/06; C09J11/08; C09J163/00
Domestic Patent References:
| WO2017094789A1 | 2017-06-08 | |||
| WO2016540901A1 |
Foreign References:
| JP2014096429A | 2014-05-22 | |||
| JPS48100602A | 1973-12-19 | |||
| JP2016039042A | 2016-03-22 | |||
| JP2009517498A | 2009-04-30 | |||
| JP2002146492A | 2002-05-22 | |||
| JP2020171171A | 2020-10-15 | |||
| JP2004042345A | 2004-02-12 | |||
| JP2021102360A | 2021-07-15 |
Other References:
HIRANO SATORU: "Dissertation", 2013, GRADUATE SCHOOL OF UNIVERSITY OF TSUKUBA, article "Thermo-Fluid Characteristics in Rotating Coaxial Cylinders Simulating an Electric Vehicle Motor Geometry", pages: 9
Attorney, Agent or Firm:
MIGITA, Shunsuke et al. (JP)
Download PDF: