Basf Se Corporation

Construction Research & Technology Gmbh

Basf Construction Polymers Gmbh

Basf Construction Solutions Gmbh

Jutta Karin Langlotz

Stefan Friedrich

Michael Schinabeck

Roland Reichenbach-Klinke

Christoph Hesse

Gregor Herth

Andrea Assmann

Michael Eberwein

Christian Trieflinger

The use of gelatin-based copolymers containing at least one grafted side chain formed from ethylenically unsaturated compounds as an anti-accretion additive is proposed for water-based drilling fluids in the development, exploitation and completion of underground mineral oil and natural gas deposits and in deep wells. These copolymers are water-soluble and have good biodegradability.

Biodegradable anti-accretion additive for water-based drilling fluids

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

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

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Trostberg, Germany

Jutta Karin Langlotz