Title:
【発明の名称】改良された分散剤及び方法
Document Type and Number:
Japanese Patent JP2000504361
Kind Code:
A
Abstract:
The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
Inventors:
Diana, William Daniel
Kusmano, Joseph Victor
Gouda, Keith Raymond
Emmaart, Jacob Isaac
Extro, William Bernard
Dunkworth, David Charles
Stannat, John Edmond
Stokes, James Peter
Kusmano, Joseph Victor
Gouda, Keith Raymond
Emmaart, Jacob Isaac
Extro, William Bernard
Dunkworth, David Charles
Stannat, John Edmond
Stokes, James Peter
Application Number:
JP52438197A
Publication Date:
April 11, 2000
Filing Date:
December 18, 1996
Export Citation:
Assignee:
Exxon Chemical Patents Incorporated
International Classes:
C10M159/12; C08F6/04; C08F6/10; C08F8/00; C08F8/10; C10L1/198; C10L1/238; C10L1/24; C10L1/30; C10M133/52; C10M159/16; (IPC1-7): C08F6/10; C08F8/10; C10M159/12
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)