Basf Se Corporation

Construction Research & Technology Gmbh

Basf Construction Polymers Gmbh

Basf Construction Solutions Gmbh

Stefan Friedrich

Michael Schinabeck

Manfred Schuhbeck

Thomas Pfeuffer

Marcus Guzmann

Roland Reichenbach-Klinke

Gregor Herth

Peter Gaeberlein

Reinhold J Leyrer

Thomas Ostrowski

Kati Schmidt

Uwe Holland

Yulia Fogel

Andrea Orleans

Michael Eberwein

Björn Langlotz

Jutta Karin Langlotz

Marcus Rösch

Gerhard Albrecht

Alfred Kern

Manfred Bichler

Torben Gädt

Christoph Hesse

Markus Rösch

Frank Dierschke

Silke Flakus

Steffen Wache

Werner Stohr

Dawid Marczewski

Bjoern Langlotz

Oliver Mazanec

Wolfgang Seidl

Volker Schwarz

Holger Misslitz

Peter Leidinger

Christian Trieflinger

Sascha Raspl

Maik Schlesinger

Thomas Gastner

Thomas Schuhbeck

Patrick Weiss

Irene Gattinger

Peter Gâberlein

Andreas Tselibidis

Pierre-Eric Millard

Michael Nachreiner

Andreas Tselebidis

Astrid Kramer

Markus Streicher

Kornelia Kratzer

Alexander Ehle

Peter Gäberlein

Silke Flakus-Taube

Diana Eissmann

Piotr Antoni Bazula

Markus Roesch

The present invention relates to coated polymer particles comprising a water-swellable polymer core and an essentially continuous coating encapsulating the core. The coating comprises an oxide, hydroxide or oxide hydrate of silicon, aluminum, zirconium, tin or titanium. The polymer particles do not show instantaneous swelling, when contacted with water or a water-containing liquid, but show delayed water absorption after an appropriate period of time. The coated polymer particles may be used in oil fields, in mining, for construction chemical compositions or as carrier for active substances. The coated polymer particles are prepared by a suspension coating process or a fluidized bed coating process.

Coated polymer particles comprising a water-swellable polymer core and a sol-gel coating

The present invention relates to a composition comprising (&#x3b1;) at least one inorganic binder and (&#x3b2;) at least one water-soluble copolymer based on (a) 0.1 to 20 wt % of at least one monomer of the formula (I) and (b) 25 to 99.9 wt % of at least one hydrophilic monomer (b) which is different from monomer (a), where the at least one copolymer has a molar mass average M of 1 500 000 to 30 000 000 g/mol. Furthermore, a process for producing this composition is disclosed. A further aspect of the present invention is the use of the copolymer of component (&#x3b2;) as rheological additive in a composition of the invention.

Inorganic binder composition comprising a copolymer

Suggested is a novel coated particle of active ingredients with controlled release properties at pH-values from 10 to 14, wherein the active ingredient is selected from one or more construction chemical additives for the control of inorganic binders, characterized in that the coating comprises shellac, a process for its manufacture and the use thereof as an additive for mortars, dry mortars, cement slurries and/or concretes.

Shellac-coated particles of active ingredients with controlled release properties at high pH-values, process for their manufacture and use thereof

A dry mortar mixture based on at least one hydraulic and/or latently hydraulic binder which in the made-up and not yet cured state has firm properties is claimed. The novel dry mortar mixture is characterized in that it contains at least one representative of a dispersant and at least one compound having superabsorbent properties. This mixture makes it possible to carry over the advantages of known tile adhesives for horizontal application to vertical application possibilities.

Dry mortar mixture

New water soluble cationic copolymers derived from N-vinyl amide monomers and ethylenically unsaturated compounds bearing cationic groups.

Cationic polymers

Water-soluble, hydrophobically associating copolymer comprising a monoethylenically unsaturated, water-soluble, surface-active monomer (a), and a monoethylenically unsaturated, hydrophilic monomer (b) different from monomer (a). The copolymer is prepared in the presence of a nonpolymerizable surfactant and has marked thickening properties in aqueous systems.

Water-soluble, hydrophobic associating copolymers

Water-soluble, hydrophobically associating copolymers which comprise new types of hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether group with block structure comprising a hydrophilic polyalkylene oxide block which consists essentially of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block which consists of alkylene oxides with at least 4, preferably at least 5 carbon atoms.

Hydrophobically associating copolymers

The present invention relates to a solid composition containing calcium silicate hydrate and at least one water-swellable polymer which can form a hydrogel, and also to a process for preparing the composition, to the use thereof as a setting accelerator, and as a grinding aid in cement production. It also relates to building material mixtures which comprise the compositions.

Powdered accelerator

Claimed is a cationic copolymer and also its use as an admixture agent for building product systems, especially based on calcium sulfate. The copolymers of the invention effectuate accelerated setting behavior in clay-containing as well as non-clay-containing gypsums and they enable uncurtailed water reduction performance by dispersant agents used at the same time with the copolymers. The clay fractions in the gypsum system are masked by the cationic copolymer, and so the building product mixture exhibits properties of a building product mixture not containing clay. The copolymers are used as a formulation and also together with retarders.

Additive for building product mixtures containing flow agents

Additives for application in construction chemistry are proposed comprising an organic and/or inorganic core component A) with rheology-enhancing properties and a shell component B) applied to the same by virtue of physical and/or chemical interactions which acts as a coating. Component A) should be a of water-soluble and/or water-swellable and/or water-absorbable compound of the non-cellulose type with viscosity-enhancing properties in the final application. The shell component B) should preferably be a film-forming polymer which is able to release component A) during the application in construction chemistry in a retarded manner such as for example polyvinyl alcohol, polyvinyl acetate and polyethylene glycol. Component B) can be composed of several layers and comprises at least one reactive layer. The new additive is used as an additive with a time-delayed action in paints and also for timed control of the increase in viscosity or development of rheology in building material systems based on inorganic binders.

Additive with applications in construction chemistry

The invention relates to polymer-modified cement-containing building material dry mixes which contain a redispersible polymer powder, water retention agents based on polysaccharide structures, a calcium-containing setting accelerator and a superabsorbent copolymer.

Polymer-modified building material dry-mixes

A polymeric composition consisting of water-soluble or water-swellable copolymers containing sulfo groups and nonionic polysaccharide derivatives, such as methylcellulose (MC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), methylhydroxyethylcellulose (MHEC), methylhydroxypropylcellulose (MHPC) and welan gum or diutan gum, and the use thereof as an additive in aqueous construction systems based on hydraulic binders, such as cement, lime, gypsum or anhydrite, is described. The composition can also be used in water-based paint and coating systems. The composition according to the invention exhibits a synergistic improvement of the properties and, when used in relatively small amounts, constitutes highly effective water retention agents in such construction and paint systems, which also achieve outstanding air pore stability and tack.

Polymer composition and use of the same as an additive in aqueous construction systems and water-based paint and coating systems

Water-soluble copolymers and terpolymers as stabilizers for aqueous building material systems and water-based paint and coating systems are described. Advantages of the copolymers and terpolymers used according to the invention compared to conventional products are firstly the very good stabilizing properties of the building material systems or water-based paint and coating systems produced correspondingly and secondly the fact that the viscosity of the systems is barely increased, so that these have excellent processability.

Water-soluble sulfonic group-containing copolymers and terpolymers the production thereof and water-based painting and coating systems

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Garching, Germany

Stefan Friedrich