Title:
ポリエステル分散剤を含む潤滑剤組成物
Document Type and Number:
Japanese Patent JP2008520795
Kind Code:
A
Abstract:
An automotive lubricant composition comprising a base fluid and an ashless polymeric dispersant is claimed. The ashless polymeric dispersant has a number average molecular weight of between 500 and 10,000 and comprises a polar tall group which itself comprises a polymeric backbone of 2 to 30 monomeric repeat units, each repeat unit comprising a hydrocarbon chain functionalised by the presence of at least one electronegative element or moiety, the tail group being linked to a polar head group which comprises a polar moiety selected from at least one of acid, ester, amide or alcohol moieties. The dispersant has good dispersancy properties, when used as a sole dispersant or in combination with other dispersants. It provides enhanced seal resistance and has good oxidative stability in automotive applications as compared to current commercial products. Furthermore the low temperature viscosity of the automotive lubricant composition with the designed dispersant is superior to that of a composition with current commercial dispersants and the designed dispersant does not react with ZDDP and reduce the antiwear capabilities of ZDDP.
Inventors:
Oldfield, Andrew Simon
Application Number:
JP2007542080A
Publication Date:
June 19, 2008
Filing Date:
November 07, 2005
Export Citation:
Assignee:
Croda International Public Limited Company
International Classes:
C10M145/22; C10L1/196; C10L1/198; C10L1/234; C10L10/06; C10L10/18; C10M101/02; C10M107/02; C10M129/74; C10M129/76; C10M161/00; F16H57/02; F16H57/04; C10N20/04; C10N30/06; C10N30/08; C10N40/04; C10N40/25
Domestic Patent References:
| JPS61213295A | 1986-09-22 | |||
| JPH08176583A | 1996-07-09 | |||
| JPH08283764A | 1996-10-29 | |||
| JP2002531684A | 2002-09-24 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu
Takashi Ishida
Tetsuji Koga
Nagasaka Tomoyasu