Byk-chemie Gmbh

United Catalysts Inc.

Sud-chemie Ag

Southern Clay Products, Inc.

Alan Lawrence Steinmetz

René Nagelsdiek

George Mark Zody

Dominika Bernert

Charles W Glancy

Justin Adams

Norbert Schall

Daniela Leutfeld

Helmut Coutelle

Klaus Dziwok

Wesley A Huff

Inge Krämer

Stefan Dick

Thadeus Schauer

Heinz Greisiger

Shakti L Mukerjee

Jasmin Rudner

Hubert Schiessling

Mark Entenmann

Sabine Huth

Wolfgang Simon

The invention relates to polymer comprising structural units according to formula (I), R&#x2014;X&#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R&#x2014;NH&#x2014;(C&#x2550;O)&#x2014;O&#x2014;POA-R&#x2014;(O&#x2014;POA-R)wherein Rrepresents an organic group terminated by a hydrocarbyl group having 6 to 50 carbon atoms, X represents O or N&#x2014;R, wherein R5 represents a hydrogen atom or a hydrocarbyl group having 1 to 30 carbon atoms, Rrepresents an aliphatic hydrocarbyl group having 4 to 40 carbon atoms, POA represents a polyoxyalkylene group, R3 represents an organic group having 2 to 40 carbon atoms, n is an integer from 1 to 6, Ris independently selected from &#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R&#x2014;NH&#x2014;(C&#x2550;O)&#x2014;X&#x2014;R, &#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R, &#x2014;R, wherein Rrepresents a hydrogen atom or an aliphatic or aromatic group having 1 to 24 carbon atoms, and wherein the polymer has an average of at least 1.8 end groups Rper molecule, a number average molecular weight in the range of 2000 to 100000 Daltons, a polydispersity in the range of 1.0 to 5.0, wherein the quotient of the polydispersity divided by (n+1) is less than 1.0, with the proviso that the polymer is not the reaction product of a) the mono-adduct of isophorone diisocyanate with 1-dodecanol and b) a polyether based on glycerol and a mixture of ethylene oxide and propylene oxide with an OH number of 18 mg KOH/g.

Polymer suitable as a thickener

The invention relates to polymer comprising structural units according to formula (I), R&#x2014;X&#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R&#x2014;NH&#x2014;(C&#x2550;O)&#x2014;O&#x2014;POA-R&#x2014;(O&#x2014;POA-R)wherein Rrepresents an organic group terminated by a hydrocarbyl group having 6 to 50 carbon atoms, X represents O or N&#x2014;R, wherein Rrepresents a hydrogen atom or a hydrocarbyl group having 1 to 30 carbon atoms, Rrepresents a hydrocarbyl group comprising an aromatic group and having 6 to 40 carbon atoms, POA represents a polyoxyalkylene group, Rrepresents an organic group having 2 to 40 carbon atoms, n is an integer from 1 to 6, Ris independently selected from &#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R&#x2014;NH&#x2014;(C&#x2550;O)&#x2014;NH&#x2014;R, &#x2014;R, wherein Rrepresents a hydrogen atom or an aliphatic or aromatic group having 1 to 24 carbon atoms, and wherein the polymer has an average of at least 1.8 end groups Rper molecule, a number average molecular weight in the range of 2000 to 100000 Daltons, and a polydispersity in the range of 1.0 to 5.0, wherein the quotient of the polydispersity divided by (n+1) is less than 1.0.

The invention relates to a drilling fluid in the form of a water-in-oil (W/O) emulsion comprising at least components (A) to (D), wherein component (D) is at least one (meth)acrylic copolymer, which contains at least one of structural units (D1), (D2) and (D3) to introduce at least one hydroxyl and/or amino functionality into the copolymer and which further contains at least one structural unit (D4), a use of said (meth)acrylic copolymer as rheological agent in drilling fluids, which are water-in-oil (W/O) emulsions, as well as to a method of producing oil and/or natural gas or of preparing the production thereof comprising the step of using the inventive drilling fluid for generating and/or operating a drill hole.

(Meth)acrylic copolymers as rheological additives in drilling fluids and drilling fluids comprising such copolymers

Compositions and methods of making urethane based nonionic associative thickeners are described herein. Uses of the nonionic associative thickeners are also described.

Tint-viscosity stabilization polymeric thickeners

A description is given of water-soluble aminoplast ether copolymers of the following structural type: wherein Z is a glycoluril central unit, B is a radical of an essentially water-insoluble polymer and R1 is a radical of a hydrophilic organic compound. The ratio R1:B is selected within a range of about 1.5 to 4:1 and the overall mass of the water-soluble aminoplast ether copolymer is from about 2000 to 50 000 g/mol such that the copolymer is soluble in water and may be used as a dispersant for e.g. pigments in polar solvents, e.g. water.

Copolymers containing aminoplast units and use thereof as a dispersing agent or stabilizers

Surface-modified fillers are described characterized by the fact that the fillers represent reactive inorganic fillers and the modifying agent represents an amphiphilic aminoplastic-ether polymer or copolymer of the structural typein which:

Use of amphiphilic polymers or copolymers for surface modification of reactive inorganic fillers

A linear aminoplast-ether copolymer of the formula: ##STR1## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, and acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, and a is a number greater than 1. The method for making the copolymer is described.

Water soluble aminoplast-ether copolymers

A coating composition containing a linear aminoplast-ether copolymer of the formula: ##STR1## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, and acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, and a is a number greater than 1.

Water based coating composition containing an aminoplast-ether copolymer

A water-containing composition containing a linear aminoplast-ether copolymer of the formula: ##STR1## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, and acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, and a is a number greater than 1.

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Louisville, KY, United States of America

Alan Lawrence Steinmetz