Title:
【発明の名称】ギヤ油組成物
Document Type and Number:
Japanese Patent JP3000567
Kind Code:
B2
Abstract:
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.
Inventors:
Robert Barnett Rhodes
Rudolph Joseph Eckert
Donald Edward Loeffler
Rudolph Joseph Eckert
Donald Edward Loeffler
Application Number:
JP24793891A
Publication Date:
January 17, 2000
Filing Date:
September 26, 1991
Export Citation:
Assignee:
Ciel International Research Mart Shats Pay BV
International Classes:
C10M143/12; C10N20/04; C10N30/02; C10N40/04; C10N60/02; (IPC1-7): C10M143/12
Domestic Patent References:
| JP5296695A | ||||
| JP58109515A | ||||
| JP3167207A |
Attorney, Agent or Firm:
Yoshio Kawaguchi (3 outside)