Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
US5705668A · kind A · utility
3Cited by
16References
8Claims
0Family size
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Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New phosphazene derivatives, fully substituted by aromatic groups and perfluoropolyethereal chains, are utilized as stabilizers for oils and greases based on perfluoropolyethers. Such derivatives inhibit the degradation process affecting the perfluoropolyethereal chains when these are subjected to high temperatures in an oxidizing atmosphere and in the presence of metals, such as for example aluminium, titanium, vanadium and their alloys, or steels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.