Gear oil compositions
The invention provides gear oil compositions comprising a base oil and a hydrogenated star polymer comprising at least four arms, each arm comprising, before hydrogenation, polymerised conjugated diene monomer units and having a weight average molecular weight in the range of from 3,000 to 15,000; a...
Saved in:
Main Authors | , , |
---|---|
Format | Patent |
Language | English |
Published |
23.08.1995
|
Edition | 5 |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The invention provides gear oil compositions comprising a base oil and a hydrogenated star polymer comprising at least four arms, each arm comprising, before hydrogenation, polymerised conjugated diene monomer units and having a weight average molecular weight in the range of from 3,000 to 15,000; a method of preparing said compositions; and the use of said hydrogenated star polymers as viscosity index improver additives in gear oil compositions. |
---|---|
Bibliography: | Application Number: CN1991109204 |