Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
US5602270A · kind A · utility
2Cited by
16References
10Claims
0Family size
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Key dates
| Filing date | May 19, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | May 19, 2015 |
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 perfluoropoyethers. 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.