The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2012
Filed:
Jan. 24, 2004
Alexander Dardin, Laudenbach, DE;
Michael Mueller, Bensheim, DE;
Boris Eisenberg, Darmstadt, DE;
Evonik Rohmax Additives GmbH, Darmstadt, DE;
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, Rrepresents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and Rand Rindependently represent hydrogen or a group of formula —COOR', in which R′ represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.