| (19) |
 |
|
(11) |
EP 0 700 986 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.04.1996 Bulletin 1996/15 |
| (43) |
Date of publication A2: |
|
13.03.1996 Bulletin 1996/11 |
| (22) |
Date of filing: 11.09.1995 |
|
| (51) |
International Patent Classification (IPC)6: C10M 119/02
// (C10M119/02, 119:02), C10N20:04, C10N50:10, C10N70:00 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB NL |
| (30) |
Priority: |
09.09.1994 EP 94202610
|
| (71) |
Applicant: SKF
Industrial Trading & Development Co, B.V. |
|
NL-3439 MT Nieuwegein (NL) |
|
| (72) |
Inventors: |
|
- Meijer, Dick
NL-3438 ET Nieuwegein (NL)
- Jacobson, Bo Olov
NL-3706 TG Zeist (NL)
- Lankamp, Herman
NL-3971 GX Bunnik (NL)
|
| (74) |
Representative: de Bruijn, Leendert C. |
|
Nederlandsch Octrooibureau
P.O. Box 29720
NL-2502 LS Den Haag
NL-2502 LS Den Haag (NL) |
|
| |
|
| (54) |
Polymer thickened lubricating grease |
(57) The present invention relates to a polymer thickener for lubricant grease compositions,
wherein the thickener comprises a mixture of (1) a high molecular weight (co- or homo-)polymer
of propylene with a weight average molecular weight ≧ 200,000 and (2) a low molecular
weight (co- or homo-)polymer of propylene with a weight average molecular weight ≦
100,000. The invention further relates to a lubricating grease composition comprising
a lubricating oil and the above polymeric thickener, as well as a method for preparing
said grease composition. Also, the invention relates to the use of such a polymer
thickener in the preparation of lubricating grease compositions with improved oil
bleeding characteristics at low temperature and improved noise characteristics and/or
improved mechanical stability.