Mica based electrical insulation
US3989875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Jul 15, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mica based electrical insulation for high temperature applications comprising reconstituted micaceous sheets impregnated with an impregnant of the family of poly (carborane siloxane) containing carborane moieties linked by siloxy groups at approximately 2-25% by weight of impregnant based on total weight of impregnated mica. The method for producing the mica based electrical insulation comprises the steps of solubilizing a poly (carborane siloxane) in a suitable solvent at a loading such as to produce a final insulation composite containing the desired weight of impregnant, placing a mica sheet of desired thickness on a suitable support, impregnating the supported mica sheet with the solution so as to achieve complete wetting, and curing the impregnated mica sheet for a time interval and at a temperature sufficient to effect cross-linking of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.