| (19) |
 |
|
(11) |
EP 0 041 851 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
03.02.1982 Bulletin 1982/05 |
| (43) |
Date of publication A2: |
|
16.12.1981 Bulletin 1981/50 |
| (22) |
Date of filing: 05.06.1981 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT NL |
| (30) |
Priority: |
09.06.1980 US 157225
|
| (71) |
Applicant: EXXON RESEARCH AND ENGINEERING COMPANY |
|
() |
|
|
| |
|
| (54) |
Lubricant composition with stabilized metal detergent additive and friction reducing
ester component |
(57) Oils with metal sulfonate or sulfurized phenate detergents and friction reducing
dicarboxylic esters are stabilized against haze or sediment formation by treatment
of this oil solution of metal additive, prior to ester incorporation, with a phosphosulfurized
polyisobutylene or a polyisobutenyl succinic anhydride at 55° to 225°C for 2-30 hours.