Title:
【発明の名称】ギアオイル添加剤濃厚物およびそれらを含有している潤滑剤
Document Type and Number:
Japanese Patent JPH08509016
Kind Code:
A
Abstract:
The concentrates comprise specified proportions of diluent oil, an organic sulfur-containing antiwear and/or extreme pressure agent, an ashless dispersant, a dimethyl ester of an aliphatic phosphonic acid in which the aliphatic group has an average in the range of about 12 to about 24 carbon atoms, and a 3-hydrocarbyl-2,5-diketopyrrolidine in which the hydrocarbyl group is an alkyl or alkenyl group having an average in the range of about 12 to about 30 carbon atoms. By using weight ratios of diketopyrrolidine to the dimethyl phosphonate of at least 3:1, the concentrate remains homogeneous at temperatures at least as low as 12 DEG C. When utilized as a top treat in gear oils formulated with conventional GL-4 and GL-5 gear additive packages substantial improvements in limited slip axle performance can be realized.
Inventors:
Connery, Gregory Es
Hartley, Rolf Jei
Hartley, Rolf Jei
Application Number:
JP52327594A
Publication Date:
September 24, 1996
Filing Date:
April 05, 1994
Export Citation:
Assignee:
ETHYL CORPORATION
International Classes:
C10M169/04; C10M141/10; C10M141/12; C10M167/00; C10N30/00; C10N30/08; C10N40/04; C10N60/14; (IPC1-7): C10M169/04
Attorney, Agent or Firm:
Heiyoshi Odashima