| (19) |
 |
|
(11) |
EP 0 157 583 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.08.1987 Bulletin 1987/32 |
| (43) |
Date of publication A2: |
|
09.10.1985 Bulletin 1985/41 |
| (22) |
Date of filing: 26.03.1985 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT NL SE |
| (30) |
Priority: |
28.03.1984 GB 8408017
|
| (71) |
Applicant: BP Chemicals Limited |
|
() |
|
| (72) |
Inventors: |
|
- Currie, Andrew Christopher
()
- Wilson, Alan Stuart
()
|
|
| |
|
| (54) |
Oil based lubricant compostions |
(57) This invention relates to oil-based lubricant compositions containing mixed esters
of trimellitic acid. The ester mixture may be produced either by mixing individual
esters of linear alcohols with those of branched chain alcohols, or by forming a mixed
ester by reacting trimellitic acid with a mixture of linear and branched chain alcohols.
The product ester mixture reduces the viscosity ratio and imparts acceptable low temperature
hydrocarbon compatibility to the lubricants.