| (19) |
 |
|
(11) |
EP 1 231 256 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
14.05.2003 Bulletin 2003/20 |
| (43) |
Date of publication A2: |
|
14.08.2002 Bulletin 2002/33 |
| (22) |
Date of filing: 08.02.2002 |
|
| (51) |
International Patent Classification (IPC)7: C10M 141/08
// (C10M141/08, 129:10, 135:02, 135:06, 135:06, 135:10, 135:30, 135:36),(C10N10/04,
30:06, 40:04) |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
09.02.2001 US 780998
|
| (71) |
Applicant: ETHYL CORPORATION |
|
Richmond, Virginia 23219-4304 (US) |
|
| (72) |
Inventor: |
|
- Srinivasan, Sanjay
Midlothian, Virginia 23113 (US)
|
| (74) |
Representative: Colmer, Stephen Gary et al |
|
Mathys & Squire 100 Gray's Inn Road
London WC1X 8AL
London WC1X 8AL (GB) |
|
| |
|
| (54) |
Automatic transmission lubricant composition with improved anti-wear properties |
(57) Automatic transmission fluids are described which contain at least 0.05 weight percent
of a dialkyl thiadiazole and sulfurized fat, sulfurized fatty acid, sulfurized fatty
acid ester, up to about 0.15 weight % of a metal-containing detergent, and/or a mixture
thereof. The transmission fluids according to the present invention exhibit improved
anti-wear and extreme pressure performance.