| (19) |
 |
|
(11) |
EP 2 194 114 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.10.2010 Bulletin 2010/43 |
| (43) |
Date of publication A2: |
|
09.06.2010 Bulletin 2010/23 |
| (22) |
Date of filing: 19.03.2010 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO SE SI SK SM TR |
| (71) |
Applicant: Shell Internationale Research Maatschappij B.V. |
|
2596 HR The Hague (NL) |
|
| (72) |
Inventors: |
|
- Paddon, Christopher Andrew
Chester, Cheshire CH2 4NU (GB)
- Wedlock, David John
Chester, Cheshire CH2 4NU (GB)
- De Laguno Gorria, Laura
Chester, Cheshire CH2 4NU (GB)
|
|
| |
|
| (54) |
Lubricating composition |
(57) The present invention provides a lubricating composition comprising a base oil selected
from the group consisting of a Fischer-Tropsch derived base oil and a poly-alpha olefin
(PAO) base oil or a combination thereof,
wherein the composition has a TBN (Total Base Number) value of from 3.5 to 70 mg KOH/g
as determined according to ASTM D 2896, and wherein the composition has a soap content
of from 15 to 30 mM.