ALKYL ACRYLATE COPOLYMER DISPERSANTS AND USES THEREOF

Japanese Patent JP2012052142

A

To provide alkyl acrylate copolymer dispersants and uses thereof.

The novel a polymer dispersant comprises an additive reaction product obtained by reacting a first monomer comprising a mixture of alkylacrylates of varying chain lengths with a second monomer comprising an olefinic carboxylic acylating agent under conditions effective for free radical polymerization of the first and second monomers to provide a base polymer comprising an acylated alkylacrylate copolymer, and wherein the base polymer is further reacted with a hydrocarbyl amine to provide an amine-functionalized polyalkylacrylate copolymer dispersant. The base polymer intermediate has a number average molecular weight between about 5,000 to about 50,000. The polyalkylacrylate copolymer dispersant has good dispersancy, low temperature properties, thickening efficiency, and antioxidancy properties. They also can improve fuel economy when used in engine lubricating compositions. They also are precipitation- or sedimentation-resistant, and do not cause or encourage such formations in finished fluids incorporating them.

LOPER JOHN T
NARESH C MATHUR
SRINIVASAN SANJAY

JP2011271057A

March 15, 2012

December 12, 2011

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AFTON CHEMICAL CORP

C10M177/00; C10M133/08; C10M145/14; C10M145/16; C10M149/22; C10M159/12; C10N20/04; C10N30/04; C10N40/04; C10N40/13; C10N40/25; C10N70/00

JPS5692904A	1981-07-28
JPS6470595A	1989-03-16
JPH10298576A	1998-11-10
JP2001164280A	2001-06-19
JPH02225596A	1990-09-07
JP4929085B2	2012-05-09

WO1997017417A1

1997-05-15

Patent business corporation Odashima patent office

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