Construction Research & Technology Gmbh

Basf Se Corporation

Goldschmidt Gmbh

Clap Co., Ltd.

Basf Construction Polymers Gmbh

Alexander Kraus

Bernd Bruchmann

Frank Rosowski

Gerhard Albrecht

Christian Scholz

Martin Winklbauer

Petra Wagner

Manfred Bichler

Joachim Dengler

Helmut Mack

Yuzhuo Li

Harald Grassl

Klaus Lorenz

Luc Nicoleau

Hans-Joachim Haehnle

Thomas M Vickers, Jr

Alfred Kern

Michael Lauter

Volodymyr Boyko

Sirus Zarbakhsh

Yongqing Lan

Torben Gädt

Jochen Mezger

Christoph Hesse

Anna Cristadoro

Daniel Schoenfelder

Hans-Joachim Hähnle

Max Siebert

Robert Reichardt

Bastian Marten Noller

Angelika Hartl

Barbara Wimmer

Frank Dierschke

Silke Flakus

Maxim Pulkin

Tatiana Mitkina

Bastiaan Bram Pieter Staal

Thomas Weitz

Matthias Georg Schwab

Viswanath Mahadevan

Sheik Ansar Usman Ibrahim

Rabie Al-Hellani

Robert Feuerhake

Madalina Andreea Stefan

Joachim Von Seyerl

Philipp Wieland

Jules Mikhael

Peter Schwesig

Frank Müller

Kristine Hartnagel

Kerstin Becher

Lars Einfeldt

Christian Renner

Christian Hübsch

Martina Brandl

Nicoletta Zeminian

Fabian Becker

Torben Gadt

Klaus K Lorenz

Paola Uribe Arocha

Ralph Baumgaertner

Sandro Moro

Roland Lange

Thomas Schuhbeck

Christian Huebsch

Stefanie Scheul

Suzanne Lianopoulos

Annmarie Kuehn

Stefanie Kuenzner

Juergen Bokern

Anil Bendale

Nicolas Moins

Wieland Reis

Michael Kaiser

Karin Groess

Michel Kettner

Ida Ros

Michael Maier

Jörg Habicht

Andrey Karpov

Daniel Schönfelder

Antonia Berres

Thomas M Vickers

Silke Flakus-Taube

Anna Mueller-Cristadoro

Torben Gaedt

Zeljko Tomovic

Annemarie Kuehn

Nina Susanne Hilesheim

Mahadevan Viswanath

Thomas Vickers

Anna Mueller- Cristadoro

The present invention relates to polycondensates containing at least a structural unit, which is an aromatic moiety bearing a polyether side chain, at least a structural unit, which is an aromatic moiety bearing at least one phosphoric acid monoester group, at least a structural unit, which is an aromatic moiety, bearing at least one hydroxy group and at least a methylene unit (&#x2014;CH&#x2014;), which is attached to two aromatic structural units. The invention also concerns a process for the production of the polycondensates, their use for the dispersion of inorganic binders, for increasing the strength development of concrete and for improving the slump-retention of concrete. The invention relates also to building material mixtures comprising the polycondensates and inorganic binders.

Polycondensate based water-reducer

Copolymers that comprise salicylic acid derivative structural units and structural units having free polyether side chains. The copolymers are suitable to plasticize inorganic binder systems, construction chemical compositions comprising the copolymers and the use of the copolymers as a plasticizer for inorganic binder systems. Binder systems with a reduced amount of Portland cement comprising at least one copolymer of the invention provide a better liquefaction and processability as compared to the binder systems without a copolymer of the invention.

Copolymers suitable for plasticizing inorganic binder systems

The present invention relates to a method for separating semi-conducting and metallic single-walled carbon nanotubes from each other and, if present, from other carbonaceous material, or for separating semi-conducting or metallic single-walled carbon nanotubes from other carbonaceous material via density separation using a solution of a polytungstate; to semi-conducting or metallic single-walled carbon nanotubes obtained by this method; and to the use of these semi-conducting or metallic single-walled carbon nanotubes. The invention further relates to the use of a polytungstate, particularly sodium polytungstate, for separating semi-conducting single-walled carbon nanotubes from metallic single-walled carbon nanotubes, or for separating semi-conducting single-walled carbon nanotubes from undesired carbonaceous material, particularly from metallic single-walled carbon nanotubes, or for separating metallic single-walled carbon nanotubes from undesired carbonaceous material, particularly from semi-conducting single-walled carbon nanotubes. The invention also relates to specific polyarylethers containing phosphate groups and their use as surface-active compounds.

Separation of semi-conducting and metallic single-walled carbon nanotubes using a polytungstate

The present invention relates to cationic copolymers, a process for the production of these cationic copolymers and the use of these cationic copolymers as dispersants for geopolymer binder systems. These cationic copolymers where the cationic charge is due to the presence of certain cyclic and/or polycationic groups are stable towards Hoffmann elimination that would otherwise occur at very high pH values. Moreover, the dispersing effect of cationic polymers can be further enhanced through the addition of polyvalent anions.

Cationic copolymers

The invention relates to dispersants for inorganic particles, preferably for hydraulic binders, which comprises the following structural units: The invention also relates to a process for preparing the dispersants, to building material mixtures comprising one or more dispersants and one or more inorganic binders. The invention relates to the use of the dispersants as a water reducing agent, as a means for reducing the viscosity and for enhancing the early strengths of aqueous inorganic binders, and also to the use as a grinding aid in the production of cement.

Dispersant for inorganic particles

The invention relates to an additive which can be used as a hardening accelerator for hydraulically setting compositions, comprising a) at least one polymeric dispersant comprising structural units having anionic or anionogenic groups and structural units having polyether side chains, b) at least one sulfonic acid compound of the formula (I) in which Ais NH, NHMe, NMe, N(CH&#x2014;CH&#x2014;OH), CH, CH, CH&#x2014;CH&#x2014;OH, phenyl, or p-CH-phenyl and Kis an alkali metal cation, or one equivalent of a cation selected from Ca, Mg, Sr, Ba, Zn, Fe, Fe, Al, Mn, or Cu, and c) calcium silicate hydrate particles.

Additive for masses that set hydraulically

The invention concerns a polycondensate containing (I) at least a structural unit, which is an aromatic moiety bearing a polyether side chain comprising 9 to 41 alkylene glycol units, (II) at least a structural unit, which is an aromatic moiety bearing at least one phosphoric acid ester group and (III) at least a methylene unit (&#x2014;CH&#x2014;), the polycondensate having a polycondensation degree of 10 to 75. Also concerned are building material mixtures containing said polycondensates and the use as dispersant for inorganic binders.

Additive for rheology improvement of inorganic binders

The present invention relates to an additive for hydraulically setting compositions, comprising a colloidally disperse preparation of at least one water-soluble salt of a polyvalent metal cation, at least one compound capable of releasing an anion which forms a sparingly soluble salt with the polyvalent metal cation, and at least one polymeric dispersant which comprises anionic and/or anionogenic groups and polyether side chains.

Additive for hydraulically setting compounds

The present invention relates to an additive for hydraulically setting compositions, comprising an aqueous, colloidally disperse preparation of at least one salt of a polyvalent metal cation and of at least one polymeric dispersant which comprises anionic and/or anionogenic groups and polyether side chains. The additive is suitable particularly as a slump retainer.

Additive for hydraulically setting compositions

The invention relates to a process for the preparation of a phosphated polycondensate, at least one sulphonic acid being used as catalyst, and to the use of the phosphated polycondensate obtained as an admixture for aqueous suspensions of hydraulic and/or latently hydraulic binders.

Method for producing phosphated polycondensation products and the use thereof

A method of utilizing a copolymer for dispersing inorganic binders, the copolymer comprising as comonomers in copolymerized form at least one ethylenically unsaturated acid monomer and at least one ethylenically unsaturated, branched polyether macromonomer. Further disclosed are dispersants for inorganic binders, comprising the subject copolymer, and building material mixtures comprising inorganic binders and the subject dispersant.

Polycarboxylate ethers with branched side chains

A polycondensation product based on aromatics and/or heteroaromatics and aldehydes, the polycondensate containing at least one structural unit (I) having a polyisobutylene side chain and an aromatic or heteroaromatic and at least one structural unit (II) having an ionizable functional group and an aromatic or heteroaromatic, structural unit (I) not being the same as structural unit (II) and the aldehyde used having no acid or ester functions. A process for the preparation and the use as an additive for hydraulic binders are disclosed.

Polycondensates having isobutylene side chain

A non-ionic polyether-polyester copolymer for extending workability to a cementitious mixture containing hydraulic cement and water, wherein the copolymer includes residues of at least the following monomers: Component A including an ethylenically unsaturated carboxylic acid ester monomer having a moiety hydrolysable in the cementitious mixture, wherein the hydrolyzed monomer residue has an active binding site for a component of the cementitious mixture; and, at least one of: Component B including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one Coxyalkylene side group of about 1 to 30 units; or, Component C including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one Coxyalkylene side group of 31 to about 350 units; wherein the molar ratio of Component A to the sum of the molar ratios of Component B and Component C is about 1:1 to about 10:1.

Copolymer admixture system for workability retention of cementitious compositions

The invention relates to a copolymer which is suitable as a superplasticizer for hydraulic binders and comprises 5 to 55 mol % of an isoprenol polyether derivative structural unit, 2 to 90 mol % of an acrylic acid derivative structural unit and 2 to 90 mol % of a hydroxyalkyl acrylate structural unit.

Copolymer comprising polyether side chains and hydroxyalkyl and acid structural units

The invention relates to a process for the preparation of polymers by free radical polymerization of monomers in the presence of water, electrochemically produced free radicals being used for initiating the free radical polymerization.

Method for initiating radical polymerizations

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Evenhausen, Germany

Alexander Kraus