| (19) |
 |
|
(11) |
EP 0 280 579 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
15.03.1989 Bulletin 1989/11 |
| (43) |
Date of publication A2: |
|
31.08.1988 Bulletin 1988/35 |
| (22) |
Date of filing: 26.02.1988 |
|
| (51) |
International Patent Classification (IPC)4: C10M 141/08, C10M 141/12, C10M 161/00, C10M 167/00, C10M 135/00
// (C10M135/00, 135:00),(C10M141/08, 129:26, 129:10, 135:00, 133:52),(C10M141/12,
135:10, 135:18, 135:00, 139:00, 133:52),(C10M161/00, 129:26, 129:10, 135:00, 135:10,
135:18, 139:00) |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
27.02.1987 GB 8704683
|
| (71) |
Applicant: EXXON CHEMICAL PATENTS INC. |
|
Florham Park
New Jersey 07932 (US) |
|
| (72) |
Inventors: |
|
- Colclough, Terence
Abingdon
Oxfordshire OX14 1QB (GB)
- Marsh, John Frederick
Abingdon
Oxfordshire (GB)
- Gibson, Frederick Alastair
Burghclere
Newbury
Berkshire (GB)
|
| (74) |
Representative: Northover, Robert Frank et al |
|
Exxon Chemical Limited
Exxon Chemical Technology Centre
PO Box 1
Abingdon
Oxfordshire, OX13 6BB
Abingdon
Oxfordshire, OX13 6BB (GB) |
|
| |
|
| (54) |
Low phosphorus/low zinc lubricants |
(57) Lubricants having antiwear, corrosion inhibition and antioxidant performance appropriate
to modern oil requirements with reduced or zero amounts of zinc and phosphorous and
without the need for large amounts and/or expensive forms of antioxidant comprise
5 to 500 parts per million by weight (ppm) of added copper present in oil-soluble
form, one or more added oil-soluble sulphur-containing compounds and a bearing corrosion
inhibitor.