Basf Se Corporation

Construction Research & Technology Gmbh

Torben Gaedt

Joachim Dengler

Martin Winklbauer

Manfred Bichler

Christoph Hesse

Oliver Mazanec

Harald Grassl

Sebastian Seufert

Iris Loescher

Ekkehard Jahns

Gerhard Albrecht

Roland Ettl

Juergen Detering

Alexander Kraus

Thorsten Bastigkeit

Heike Weber

Michael Schinabeck

Thomas Eiting

Luc Nicoleau

Bolette Urtel

Mario Vierle

Sophie Putzien

Uwe Gehrig

Frank Dierschke

Konrad Wutz

Maxim Pulkin

Madalina Andreea Stefan

Tatiana Mitkina

Klaus Seip

Alexander Assmann

Peter Schwesig

Nina Susanne Hillesheim

Michael Dietzsch

Ewald Heintz

Dorota Sendor-Mueller

Michael Melchart

Antonia Grafetstetter

Bernhard Mayr

Klaus Hartl

Adolf Faerberboeck

Christian Schmidtke

The invention relates to a process for producing a pulverulent composition comprising at least one polymeric dispersant (PD) which comprises structural units having anionic and/or anionogenic groups and structural units having polyether side chains, and at least one polysaccharide (PS). The process here comprises the process steps: a) production of an aqueous dispersion having a viscosity of the dispersion of less than 10 000 mPa·s, comprising the at least one polymeric dispersant (PD) and the at least one polysaccharide (PS) and b) spray drying of the aqueous dispersion produced in process step a). Furthermore, the use of the pulverulent composition according to the invention in inorganic binder compositions, especially as a rheological additive, is disclosed.

Spray drying method

The present invention relates to a process for producing a redispersible dispersion powder, to the redispersible dispersion powder obtainable by this process, to an aqueous dispersion obtainable by step (1) of this process, and to a building material composition comprising the redispersible dispersion powder and/or the aqueous dispersion, to the use of the redispersible dispersion powder in a building material composition and to the use of the aqueous dispersion for production of a redispersible dispersion powder.

Process for producing an aqueous dispersion and redispersible dispersion powder produced therefrom

A composition may be suitable for flowable refractory materials and include calcium aluminate cement, a filler, a plasticizer in the form of a copolymer comprising polyether side chains, and a retarder having at least one acid. An article may include such a composition.

Composition for flowable fire-resistant materials

The invention relates to a process for modifying polymer particles of an aqueous polymer dispersion in which positively or negatively charged polymer particles are provided with an inorganic salt shell. The inorganic shell leads to an improved drying ability and storage stability of the latex and improves the storage stability of the resulting polymer powder. The obtained polymer powder exhibits an improved viscosity and faster skin-forming time in the final application and is therefore particularly useful in a building material composition.

Process for modifying polymer particles of an aqueous polymer dispersion, an aqueous polymer dispersion obtainable by said process, a redispersible polymer powder, and a composition comprising the redispersible polymer powder

The invention relates to a method for producing a dispersant, comprising the steps of

Method for producing a dispersant

The present invention relates to construction chemical compositions comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder. The composition is useful as a hydration control agent of the inorganic binder.

Construction chemical compositions comprising a bisulfite adduct of glyoxylic acid

The invention relates to a process for producing a composition suitable as accelerator for the curing of cement, by contacting the components aa) at least one component selected from the series of hydraulic binders and/or latent hydraulic binders, and bb) at least one dispersant suitable for the dispersing of inorganic particles in water, and cc) water, the weight ratio of components aa) to cc) being between 1.5:1 and 1:70, wherein the rate ratio of components aa) to bb) is between 20:1 and 1:2. In addition, the use of the composition obtained as hardening acceleration for chemical mixtures in construction is disclosed.

Accelerator composition

The invention relates to a method for producing a calcium silicate hydrate-comprising hardening accelerator in powder form, which comprises the steps of The invention also relates to the hardening accelerator obtainable by this method, to the use thereof, and to building material mixtures which comprise the hardening accelerator.

Method for producing a calcium silicate hydrate-comprising hardening accelerator in powder form

The invention relates to a dispersant comprising a polymer obtainable by copolymerization of monomers including 5 to 80 mol % of a hydroxyalkyl acrylate phosphate and/or hydroxyalkylacrylamide phosphate (monomer 1), 0 to 20 mol % of a di(hydroxyalkyl acrylate) phosphate and/or di(hydroxyalkylacrylamide) phosphate (monomer 2) and 1 to 80 mol % of a polyalkylene glycol-containing macromonomer comprising an alkene group (monomer 3). Further disclosed is a process for preparing the polymers of the invention and the use thereof as dispersants in calcium sulphate-containing compositions. A further aspect of the invention is a process for producing shaped gypsum bodies, and also shaped gypsum bodies, more particularly gypsum plasterboards and self-levelling screeds, comprising the dispersant of the invention.

Polymeric dispersant

The invention concerns a composition containing a) 2 to 80 weight % of Ordinary Portland Cement with respect to the total weight of the composition b) 2 to 80 weight % of a calcium sulfate based binder with respect to the total weight of the composition, with the proviso that the weight ratio of a) Ordinary Portland Cement to b) calcium sulfate based binder is from 95/5 to 5/95 and c) at least one retarder for calcium sulfate based binders, the retarder being a chemical structure, which comprises from 3 to 70 amino acids. Also concerned is the use of the compositions for self-levelling underlayments, tile adhesives, non-shrink grouts, floor screeds and repair mortars.

Cement and calcium sulfate based binder composition

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Traunstein, Germany

Torben Gaedt