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Patent Searching and Data


Title:
VISCOSITY INDEX IMPROVER
Document Type and Number:
Japanese Patent JPH0617077
Kind Code:
A
Abstract:

PURPOSE: To obtain a viscosity index improver which has a low viscosity and is oxidation-resistant by dispersing an olefin polymer in a high concn. in a medium comprising an alkyl-substd. phneol, etc., using a specific dispersant.

CONSTITUTION: An adduct (A) of an ethylenically unsatd. dicarboxylic acid with an olefin polymer is reacted with a compd. (B) having a group selected from the group consisting of amino, ketimine, hydroxyl, and isocyanate groups (e.g. ethylamine) to give a compd. comprising residues of components A and B bonded to each other through an amide group, an imide group, an ester group, etc. The resulting compd. is used as a dispersant for dispersing an olefin polymer in a high concn. in a medium which comprises an alkyl-substd. phenol and/or alkyl salycilate and does not dissolve or hardly dissolves the polymer, giving the objective improver.


Inventors:
SAKAI KOUZOU
YOSHIDA KOREYUKI
DAKURIGE MAKOTO
Application Number:
JP19257891A
Publication Date:
January 25, 1994
Filing Date:
July 05, 1991
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD
International Classes:
C09K3/00; C10M157/00; C10M161/00; C10N30/02; C10N30/10; C10N40/25; (IPC1-7): C10M161/00; C09K3/00