High voltage insulating compositions containing phosphorus compounds
US4219607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Jan 13, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/2813
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
New high voltage insulating compositions are disclosed. The compositions comprise a polymer (e.g. a polysiloxane, epoxide resin or a polymer of one or more olefins or substituted olefins), an antitracking additive (e.g. an alumina hydrate), and certain phosphorus-containing compounds which have been found to provide the compositions with greatly improved resistance to erosion by high voltage stress. The phosphorus-containing compounds include phosphonates, phosphates, phosphites, phosphinates, phosphonites, phosphinites, phosphine oxides and sulfides, and phosphines, and salts and complexes thereof. The phosphorus-containing compound can react in situ with the polymer or other ingredients of the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.