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:
Apr. 24, 2012
Filed:
Aug. 04, 2006
Torsten Stoehr, Frankfurt, DE;
Michael Mueller, Bensheim, DE;
Boris Eisenberg, Heppenheim, DE;
Harald Becker, Bayreuth, DE;
Axel Mueller, Wiesbaden, DE;
Torsten Stoehr, Frankfurt, DE;
Michael Mueller, Bensheim, DE;
Boris Eisenberg, Heppenheim, DE;
Harald Becker, Bayreuth, DE;
Axel Mueller, Wiesbaden, DE;
Evonik Rohmax Additives GmbH, Darmstadt, DE;
Abstract
(EN) The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; Rrepresents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; Rand Rindependently represent hydrogen or a group of formula —COOR', wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which Rrepresents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; Rand Rindependently represent hydrogen or a group of formula —COOR′, wherein R′ represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The invention also relates to oil formulations comprising the inventive polymers. The inventive polymers having a high thickening action can be used, in particular, as viscosity modifiers, pour point depressants, dispersing agents and/or friction modifiers.