Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
US5441655A · kind A · utility
11Cited by
16References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
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 aluminum, titanium, vanadium and their alloys, or steels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.