| (19) |
 |
|
(11) |
EP 1 568 758 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
19.07.2006 Bulletin 2006/29 |
| (43) |
Date of publication A2: |
|
31.08.2005 Bulletin 2005/35 |
| (22) |
Date of filing: 24.02.2005 |
|
| (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 MC NL PL PT RO SE SI
SK TR |
|
Designated Extension States: |
|
AL BA HR LV MK YU |
| (30) |
Priority: |
27.02.2004 US 788734
|
| (71) |
Applicant: Afton Chemical Corporation |
|
Richmond,
VA 23219 (US) |
|
| (72) |
Inventors: |
|
- Iyer, Ramnath N.
Glen Allen, VA 23059 (US)
- Tersigni, Samuel H.
Glen Allen, VA 23060 (US)
|
| (74) |
Representative: Dunleavy, Kevin James |
|
Knoble & Yoshida LLC,
p/o De Vries & Metman,
Overschiestraat 180
1062 XK Amsterdam
1062 XK Amsterdam (NL) |
|
| |
|
| (54) |
Lubricant compositons for automatic transmissions |
(57) Compositions and methods are disclosed for providing anti-shudder performance in
power transmission fluids through the incorporation of a non-dispersant viscosity
index improver. Further, the disclosed compositions achieve improved compatibility
of an elastomeric component with a lubricating fluid through the incorporation of
a non-dispersant viscosity index improver.