| (19) |
 |
|
(11) |
EP 1 925 657 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
31.03.2010 Bulletin 2010/13 |
| (43) |
Date of publication A2: |
|
28.05.2008 Bulletin 2008/22 |
| (22) |
Date of filing: 19.09.2007 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO
SE SI SK TR |
|
Designated Extension States: |
|
AL BA HR MK RS |
| (30) |
Priority: |
10.10.2006 US 545703
|
| (71) |
Applicant: Infineum International Limited |
|
Abingdon
Oxfordshire OX13 6BB (GB) |
|
| (72) |
Inventors: |
|
- Tse, Kwok-Leung,c/o Infineum USA L.P.
Linden, NJ 07036 (US)
- Emert, Jacob, c/o Infineum USA L.P.
Linden, NJ 07036 (US)
- Bansai, Jai, c/o Infineum USA L.P.
Linden, NJ 07036 (US)
|
| (74) |
Representative: Goddard, Frances Anna et al |
|
Infineum UK Limited,
PO Box 1,
Milton Hill
Abingdon,
Oxfordshire OX13 6BB
Abingdon,
Oxfordshire OX13 6BB (GB) |
|
| |
|
| (54) |
Lubricating oil compositions |
(57) Lubricating oil compositions and viscosity index (VI) improver concentrates containing
combinations of first polymers that arc amorphous ethylene α-olefin copolymers; and
second polymers that are star polymers, the arms of which are derived from diene,
and optionally vinyl aromatic hydrocarbon monomer, wherein the star polymers have
a Shear Stability Index (SSI) of from about 1% to about 35% (30 cycle).