公开(公告)号：US20190031946A1

公开(公告)日：2019-01-31

申请号：US16069646

申请日：2017-01-04

Applicant: BASF SE

Inventor： ROLAND RECHENBACH-KLINKE ,  Christian BITTNER ,  Tobias ZIMMERMANN ,  Arne STAVLAND

IPC: C09K8/588 ,  C08F220/56

Abstract: A method of tertiary production of mineral oil from underground deposits having a deposit temperature of ≤70° C., in which a copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and an associative monomer is used, wherein the amount of the associative monomer is 0.1% to 0.9% by weight. A water-soluble copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and 0.1% to 0.9% by weight of an associative monomer.