Byk-chemie Gmbh

Dentsply Detrey G.m.b.h.

Dentsply Detry Gmbh

Dominika Bernert

René Nagelsdiek

Daniela Leutfeld

Alan Lawrence Steinmetz

George Mark Zody

Justin Adams

Joachim E Klee

Helmut Ritter

Oliver Elsner

Sven Pohle

Wesley A Huff

Sylvia Bühne

Berthold Jacobs

Jasmin Rudner

Silke Gaul

Verena Karwath

Alan Steinmetz

Sylvia BÜHNE

Alan L Steinmetz

George M Zody

Joachim E Prof Klee

Helmut Prof Ritter

Rene Nagelsdiek

The invention relates to urea- and/or urethane-substituted amides of the general formula (I) The radicals R1, Z1, R2, and Z2 comprise a building block containing urea groups and/or containing urethane groups; the radicals R4, Z4, R5, and Z5 comprise a building block containing amide groups, and E is a carboxylic acid group or salt thereof. The invention also relates to rheology control agents which consist of or comprise the amides of the formula (I). A further subject of the invention is a method for producing the rheology control agents, and the use of the urea- and/or urethane-substituted amides, and also of the rheology control agents, as thickeners, especially in liquid compositions, and also the liquid compositions themselves.

Urea-group- and/or urethane-group-containing amides as and in rheology control agents, their preparation and their use

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

An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant groups, (c) optionally dispersed nanoparticles comprising grafted linear or branched polymer chains comprising acidic groups, and having a polymer backbone characterized in that a polymer backbone of the linear or branched polymer of component (b) and/or, if present, the grafted linear or branched polymer chains of component (c) are obtainable a process comprising (i) cyclopolymerizing or cyclocopolymerizing one or more compounds of the following formula (I): 

Dental composition

An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant groups, (c) optionally dispersed nanoparticles comprising grafted linear or branched polymer chains comprising acidic groups, and having a polymer backbone characterized in that a polymer backbone of the linear or branched polymer of component (b) and/or, if present, the grafted Sinear or branched polymer chains of component (c) are obtainable a process comprising (i) cyclopolymerizing or cyclocopolymerizing one or more compounds of the following formula (I). 

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Wesel, Germany

Dominika Bernert