Title:
NOVEL VISCOSITY INDEX IMPROVER
Document Type and Number:
Japanese Patent JP2754342
Kind Code:
B2
Abstract:
PURPOSE: To lower the low-temp. viscosity of a high-viscosity-index mineral oil contg. an isomerized paraffin by mixing a specific methacrylate copolymer into the oil.
CONSTITUTION: A viscosity index inprover comprising a copolymer having a wt. average mol.wt. of 10,000-300,000 is obtd. by subjecting 5-30wt.% alkyl methacrylate (A) having a 1-4C alkyl group, an alkyl methacrylate (B) having a 12-13C alkyl group, an alkyl methacrylate (C) having a 14-15C alkyl group, and 0-20wt.% alkyl methacrylate (D) having a 16-18C alkyl group in a wt. ratio of component B to component C of (6/4)-(1/19) to free-radical polymn. in the presence of an azoic or peroxide polymn. catalyst in a mineral oil or other solvent.
Inventors:
SAKAI KOZO
TAKIGAWA SHOJI
TAKIGAWA SHOJI
Application Number:
JP21208794A
Publication Date:
May 20, 1998
Filing Date:
August 11, 1994
Export Citation:
Assignee:
SANYO KASEI KOGYO KK
International Classes:
C09K3/00; C08F220/10; C08F220/18; C08K5/01; C08L33/10; C10M169/04; C10N30/02; C10N40/08; C10N40/25; (IPC1-7): C10M169/04; C08F220/18; C08K5/01; C08L33/10
Domestic Patent References:
| JP5470305A | ||||
| JP4277597A |
Previous Patent: SIDE PANEL STRUCTURE OF EXTENDING/CONTRACTING TYPE STEPPED MOVING STAND
Next Patent: SELF-LEVELING FLOORING NONAQUEOUS COMPOSITION
Next Patent: SELF-LEVELING FLOORING NONAQUEOUS COMPOSITION