Insulating paper for oil-immersed motors
US9931812B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2012 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31562
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is provided insulating paper for oil-immersed motors used in an oil-immersed motor in a state where folding is applied to the paper, the motor operating in a state where it is immersed in a cooling oil, the paper including a polyester film and heat resistant sheets made from aromatic polyamide laminated to both front and back surfaces of the polyester film, the polyester film and the heat resistant sheets being bonded with an acrylic adhesive, wherein the acrylic adhesive contains polyisocyanate and a polybutyl acrylate having a weight average molecular weight of 400,000 or more in a proportion of the polyisocyanate of more than 3 parts by weight and 20 parts by weight or less based on 100 parts by weight of the polybutyl acrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.