公开(公告)号：US10465027B2

公开(公告)日：2019-11-05

申请号：US15537180

申请日：2015-12-16

申请人： Evonik Oil Additives GmbH

发明人： Rhishikesh Gokhale ,  Sandra Muehling ,  Miriam Kathrin Stihulka ,  Klaus Schimossek ,  Frank-Olaf Maehling

IPC分类号： C08F220/18 ,  C08F2/10 ,  C08F222/06 ,  C10M145/16 ,  C10M145/14

摘要： 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：US10472444B2

公开(公告)日：2019-11-12

申请号：US16035232

申请日：2018-07-13

申请人： Evonik Oil Additives GmbH

发明人： Rhishikesh Gokhale ,  Sandra Gebhardt ,  Miriam Kathrin Stihulka ,  Klaus Schimossek ,  Frank-Olaf Maehling

IPC分类号： C08F222/06 ,  C08F222/08 ,  C08F2/10 ,  C08F220/18 ,  C10M145/16 ,  C10M145/14 ,  C08F22/06

摘要： The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.

公开(公告)号：US09957342B2

公开(公告)日：2018-05-01

申请号：US14440232

申请日：2013-10-08

申请人： EVONIK OIL ADDITIVES GMBH

发明人： Justin August Langston ,  Barbara Voltz ,  Frank-Olaf Maehling ,  Michael G Duckworth ,  Brian Hess ,  Rhishikesh Gokhale

IPC分类号： C08F265/04 ,  C10L1/18 ,  C10L10/14 ,  C10L1/14 ,  C10L1/16 ,  C08L51/00 ,  C10L1/22 ,  C08F265/06 ,  C10L1/196 ,  C10L1/236 ,  C10L10/00

CPC分类号： C08F265/04 ,  C08F265/06 ,  C08L51/003 ,  C08L2203/40 ,  C10L1/143 ,  C10L1/16 ,  C10L1/1616 ,  C10L1/18 ,  C10L1/1963 ,  C10L1/1966 ,  C10L1/22 ,  C10L1/236 ,  C10L1/2364 ,  C10L1/2366 ,  C10L1/2368 ,  C10L10/00 ,  C10L10/14 ,  C10L2200/0259 ,  C10L2200/0438 ,  C10L2200/0446 ,  C10L2200/0469 ,  C10L2200/0476 ,  C10L2230/14 ,  C08F226/10

摘要： The present invention relates to a process for preparing grafted polyalkyl(meth)acrylates (PAMAs) containing dispersant repeating units in the polymer backbone as well as in the grafted layer, which polymers are characterized by a low sulfur content, the products available by this process and their use as an additive to fuels, especially to middle distillates and blends thereof. The present invention further relates to a composition comprising the grafted polyalkyl(meth)acrylates prepared by the process according to the present invention and the use of said composition as an additive component to fuels, especially to middle distillates and blends thereof, and for improving the cold flow properties of fuel oil and fuel oil compositions, especially to middle distillate fuels and blends thereof.