Clariant Corporation

Clariant Produkte (deutschland) Gmbh

Clariant UK Ltd.

Clariant Produkte Gmbh

Aranka Tardi

Christoph Kayser

Karl Heinz Heier

Gernold Botthof

Roman Morschhäuser

Matthias Löffler

Roman Morschh&auml;user

Michael Schaefer

Juergen Tonhauser

Reinhard J Oswald

Matthias Krull

Roman Morschhaeuser

Florence L'Alloret

Pierre Maroy

Volker Frenz

James Charles Morgan

Jan Glauder

Alistair Manson Gunn

Manfred Schade

Dan Patterson

Susanne Weber

Michael Schäfer

The invention relates to a copolymer containing: i) 80-90% by weight of one or more structural units of the formula A, where Ris hydrogen or methyl, Ris C-C-alkylene, and Meis an ammonium or an alkali metal ion; ii) from 1 to 10% by weight of one or more structural units of the formula B where Rand Rare each independently hydrogen, methyl or ethyl; iii) from 1 to 10% by weight of one or more structural units of the formula C, where n is a number from 1 to 6; iv) from 0.1 to 5% by weight of structural units of the formula D where X is hydrogen, an ammonium ion or an alkali metal ion; and optionally, v) from 0 to 10% by weight of one or more structural units of the formula E, where Ris hydrogen, methyl and/or ethyl, with the proviso that the content in the copolymers of structural units B) and C) is from 6 to 15% by weight.     

Thermally stable water-soluble polymer which is crosslinkable at high temperatures

A method for reducing or completely eliminating water influx in an oil or natural gas borehole includes introducing in the borehole an aqueous solution of a copolymer comprising: A) 40&#x2013;98 wt. % of structural units of formula (I), wherein: Ris hydrogen or methyl; Rrepresents C&#x2013;Calkylene; and Merepresents an ammonium metal ion and an alkali metal ion; B) 0.1 to 58 wt. % of structural units of formula (II); C) 0.1 to 10 wt. % of structural units of formula (III), wherein: Rand Rindependently of each other represent hydrogen, methyl or ethyl, or Rand Rrepresent together a propylene group, which, with inclusion of a radical (A), form a pyrrolidon radical or, with inclusion of a pentamethylene group, forms a caprolactam radical; D) 0.10 to 10 wt % of structural units of formula (IV). The method also includes introducing in the ground or deposit, simultaneously with the copolymer or subsequently, an agent for crosslinking the copolymer.

Method for reducing or completely eliminating water influx in an underground formation, and crosslinkable copolymers for implementing said method

The invention relates to compositions comprising copolymers based on acryloyldimethyltaurine and also synergistic additives selected from anionic, cationic, nonionic, and betaine surfactants. The compositions exhibit a pronounced thermoassociative behavior and are outstandingly suitable as thickeners. The copolymers of the present invention are useful in formulating cosmetics, pharmaceuticals, and oil field chemicals.

Compositions containing copolymers based on acryloyldimethyl aminoethylsulfonic acid and synergistic additives

The invention provides water-soluble or water-swellable copolymers obtained by free-radical copolymerization of The water-soluble or water-swellable copolymers of the present invention are useful in formulating cosmetics.

Comb-shaped copolymers based on acryloyldimethyltaurine acid

Water-soluble copolymers and their use for exploration and production of petroleum and natural gas

Copolymers and their use as drilling aids

Well cementing aids

Growing community of inventors

Neuberg, Germany

Aranka Tardi