公开(公告)号：US20180216023A1

公开(公告)日：2018-08-02

申请号：US15746533

申请日：2016-07-06

Applicant: Evonik Oil Additives GmbH

Inventor： Stefan MAIER ,  Oliver SPRINGER ,  Jennifer HOLTZINGER ,  Klaus SCHIMOSSEK ,  Thomas DAMASKE ,  Marcus STEPHAN ,  Jan Marian VON HOF

IPC: C10M129/78 ,  C10M105/42 ,  C10M169/04

CPC classification number: C10M129/78 ,  C10M105/42 ,  C10M169/04 ,  C10M169/044 ,  C10M2203/1025 ,  C10M2205/028 ,  C10M2205/0285 ,  C10M2207/281 ,  C10M2207/282 ,  C10M2207/283 ,  C10M2207/30 ,  C10N2220/02 ,  C10N2220/021 ,  C10N2230/02 ,  C10N2230/06 ,  C10N2240/10

Abstract: The present invention relates to a lubricating oil composition comprising polyglycerol partial esters of polyfunctional carboxylic acids and saturated or unsaturated, linear or branched fatty acids and/or poly(hydroxystearic acid) and the use thereof to lubricate an engine and reduce friction.

公开(公告)号：US20190071615A1

公开(公告)日：2019-03-07

申请号：US16119878

申请日：2018-08-31

Applicant: Evonik Oil Additives GmbH

Inventor： Katrin SCHÖLLER ,  Sarah LIPPERT ,  Wolfgang TSCHEPAT ,  Klaus SCHIMOSSEK

IPC: C10M145/14 ,  C08F220/18

Abstract: Polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700,000 g/mol or greater and number-average molecular weights of 130,000 g/mol or greater can be used to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions. These polymers can be obtained in a reaction mixture comprising monomers, a dilution oil, and an initiator. The resulting lubricant compositions can have improved kinematic viscosity and high temperature high shear performance.

公开(公告)号：US20170369615A1

公开(公告)日：2017-12-28

申请号：US15537180

申请日：2015-12-16

Applicant: Evonik Oil Additives GmbH

Inventor： Rhishikesh GOKHALE ,  Sandra MUEHLING ,  Miriam Kathrin STIHULKA ,  Klaus SCHIMOSSEK ,  Frank-Olaf MAEHLING

IPC: C08F220/18 ,  C08F222/06

Abstract: A method for the preparation of a sulfur-free copolymer proceeds by solution polymerization in the presence of a radical initiator, wherein the copolymer contains at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol.

公开(公告)号：US20190233757A1

公开(公告)日：2019-08-01

申请号：US16300639

申请日：2017-05-11

Applicant: Evonik Oil Additives GmbH ,  Regents of the University of Minnesota

Inventor： Klaus SCHIMOSSEK ,  Katrin SCHOELLER ,  Mohammad T. SAVOJI ,  Marc A. HILLMYER ,  Timothy P. LODGE

IPC: C10M145/14 ,  C08F277/00 ,  C10M169/04

CPC classification number: C10M145/14 ,  C08F8/04 ,  C08F255/08 ,  C08F277/00 ,  C08F283/14 ,  C08F293/005 ,  C08F2438/01 ,  C08G61/08 ,  C08G2261/136 ,  C08G2261/3322 ,  C08G2261/418 ,  C08G2261/74 ,  C10M159/005 ,  C10M169/041 ,  C10M2203/003 ,  C10M2203/1025 ,  C10M2205/022 ,  C10M2205/10 ,  C10M2209/084 ,  C10N2220/021 ,  C10N2220/022 ,  C10N2230/02 ,  C10N2230/68 ,  C10N2240/10 ,  C08F220/18 ,  C08F220/68 ,  C10M2205/024

Abstract: A graft copolymer can include, in its backbone, at least one segment having repeating units obtainable by ring-opening metathesis polymerization (ROMP) of an optionally substituted cycloalkene, and at least one segment comprising repeating units obtainable by atom transfer radical polymerization (ATRP) of a (meth)acrylate. The corresponding graft copolymer is highly suitable for use as an oil additive in internal combustion engines, in particular, in combustion engines which are operated for longer periods of time at substantially constant operating temperatures.

公开(公告)号：US20170362360A1

公开(公告)日：2017-12-21

申请号：US15536465

申请日：2015-12-16

Applicant: Evonik Oil Additives GmbH

Inventor： Rhishikesh GOKHALE ,  Sandra MUEHLING ,  Miriam Kathrin STIHULKA ,  Klaus SCHIMOSSEK ,  Frank-Olaf MAEHLING

IPC: C08F220/18 ,  C08F2/00 ,  C10L1/196 ,  C10L10/14 ,  C10M145/16 ,  C08F222/06

Abstract: A method for the preparation of a copolymer containing at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 4000 to 18000 g/mol proceeds by solution polymerization in the presence of a radical initiator.