| (19) |
 |
|
(11) |
EP 0 391 653 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.12.1990 Bulletin 1990/52 |
| (43) |
Date of publication A2: |
|
10.10.1990 Bulletin 1990/41 |
| (22) |
Date of filing: 02.04.1990 |
|
| (51) |
International Patent Classification (IPC)5: C10M 141/08, C10M 141/10, C10M 141/12, C10M 167/00
// (C10M141/08, 125:06, 129:28, 133:04, 135:02, 135:04, 135:06),(C10M141/10, 129:28,
133:04, 137:02, 137:04, 137:08, 137:10),(C10M141/12, 125:06, 125:06, 129:28, 133:04,
135:02) |
|
| (84) |
Designated Contracting States: |
|
BE DE ES FR GB IT |
| (30) |
Priority: |
03.04.1989 GB 8907474
|
| (71) |
Applicant: ETHYL PETROLEUM ADDITIVES LIMITED |
|
Bracknell,
Berkshire RG12 2UW (GB) |
|
| (72) |
Inventors: |
|
- Thomas, Arthur Samuel
Swansea, SA3 3DN,
Wales (GB)
- Macpherson, Ian
Windsor,
Berkshire SL4 4PE (GB)
- Richardson, Clive Ralph
Wokingham,
Berkshire RG11 1TE (GB)
|
| (74) |
Representative: Collier, Jeremy Austin Grey (GB) et al |
|
J.A. Kemp & Co.
14 South Square, Gray's Inn
GB-London WC1R 5EU
GB-London WC1R 5EU (GB) |
|
| |
|
| (54) |
Lubricant compositions |
(57) Lubricant compositions, especially suitable as gear oils, containing sulphur-containing
extreme pressure or anti-wear agents, are improved by incorporation of an oil-soluble
salt of an amine and a weak acid or amino acid. The resulting compositions confer
extended life on gears operated in them.