Associative copolymers with hydrophobic quaternized (meth)acrylamide and (meth)acrylic acid derivatives

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United States of America Patent

PATENT NO 11613686
APP PUB NO 20210230331A1
SERIAL NO

15734557

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Abstract

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The present invention relates to a process for the preparation of a water-soluble copolymer comprising the step of reacting a monomer (a) of formula (I), (1) wherein Q1, Q2, R1 to R7 and X have the meaning as indicated in the description and claims with at least one monoethylenically unsaturated, anionic monomer (b), preferably representing a monoethylenically unsaturated monomer comprising at least one carboxy, phosphonate or sulfonate group and salts thereof, preferably their ammonium salts or alkaline-earth metal salts or alkali metal salts; and at least one monoethylenically unsaturated, non-ionic monomer (c). The present invention further relates to a copolymer obtainable by said process and its use in enhanced oil recovery (EOR), a formulation comprising said copolymer and a method of oil production uses said formulation.

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Patent Owner(s)

Patent OwnerAddress
BASF SEGERMANY'S RHINE RIVER IN LUDWIGSHAFEN LUDWIGSHAFEN RHINELAND-PALATINATE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bittner, Christian Ludwigshafen am Rhein, DE 82 661
Langlotz, Bjoern Ludwigshafen am Rhein, DE 11 23
Stein, Stefan Ludwigshafen am Rhein, DE 30 156

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