| (19) |
 |
|
(11) |
EP 0 913 455 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
17.05.2000 Bulletin 2000/20 |
| (43) |
Date of publication A2: |
|
06.05.1999 Bulletin 1999/18 |
| (22) |
Date of filing: 29.10.1998 |
|
| (51) |
International Patent Classification (IPC)7: C10M 163/00, C10M 159/12
// (C10M159/12, 135:18, 135:20, 135:22, 135:30, 159:08, 159:22),(C10M163/00, 135:18,
135:20, 135:22, 135:30, 159:08, 159:22), C10N30:12 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
30.10.1997 JP 29894097
25.02.1998 US 30381
|
| (71) |
Applicant: The Lubrizol Corporation |
|
Wickliffe, Ohio 44092 (US) |
|
| (72) |
Inventor: |
|
- Haruna, Junsuke
Tokai-City, Aichi (JP)
|
| (74) |
Representative: Crisp, David Norman et al |
|
D. YOUNG & CO. 21 New Fetter Lane
London EC4A 1DA
London EC4A 1DA (GB) |
|
| |
|
| (54) |
Method to improve copper corrosion performance of molybdenum dithiocarbamate active
sulfur by adding sunflower oil |
(57) Lubricating compositions are described which contain organomolybdenum compounds and
sulfur compounds (donors). The copper corrosion of said compositions is reduced by
reacting the sulfur donors with plant oils to reduce sulfur activity and thus copper
corrosion prior to the sulfur donors being added to the majority of oil to form a
lubricating composition.