Patent · US Active

Lubricating oil composition with good frictional properties

US8288327B2 · kind B2 · utility

3Cited by

9References

17Claims

0Family size

Assignee

Evonik RohMax Additives GmbH · DE

Inventors

Alexander Dardin · Hemsbach, DE
Michael Mueller · Bensheim, DE
Boris Eisenberg · Heppenheim, DE

Key dates

Filing date	Jan 24, 2004
Grant date	Oct 16, 2012
Priority date	—
Expiry date	Jan 19, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2070/00
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR′, in which R′ represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.