Basf Aktiengesellschaft

Basf Se Corporation

Construction Research & Technology Gmbh

Rolf Gulden

Joachim Pakusch

Stefan Becker

Hans-J&uuml;rgen Denu

Thomas Goetz

Mario Sandor

Maximilian Angel

Rainer Dyllick-Brenzinger

Andree Dragon

Heinrich Sack

Wolfgang H&uuml;mmer

Markus Klumpe

Christian Knoll

Markus Koppers

Thomas GÖTZ

The present invention relates to the use of comb polymers which have a carbon backbone which bears polyether groups of the formula A*&#x2014;U&#x2014;(C(O))&#x2014;X-(Alk-O)&#x2014;W&#x2003;&#x2003;Awherein

Use of comb polymers as a grinding agent for preparations containing cement

The present invention relates to novel comb polymers which bear poly-C-C-alkylene ether side chains A and functional groups B which at a pH of &#x3e;12 are present in the form of anionic groups on a carbon backbone and also the salts of such comb polymers. The invention also relates to the use of these comb polymers as additives in preparations comprising a mineral binder. The polyalkylene ether side chains A have the following formula:*&#x2014;U&#x2014;(C(O))&#x2014;X-(Alk-O)&#x2014;Y&#x2014;Z&#x2003;&#x2003;A.

Comb polymers and their use as additives for preparations of mineral binders

An aqueous polymer dispersion, wherein the dispersion contains from 0.0001 to 1 mol of a hydrolyzable silicon group and from 0.0001 to 1 mol of a urea or thiourea group, based, in each case, on 100 g of the polymer present in the dispersion.

Silane-containing polymer dispersions for tile cements

The present invention provides a process for preparing polymer powders by evaporating the volatile constituents from aqueous dispersions of film-forming polymers P in the presence of drying assistants T selected from the salts of oligomeric arylsulfonic acid-formaldehyde condensates wherein prior to the evaporation of the volatile constituents the aqueous polymer dispersion comprises at least 1.5% by weight, preferably at least 1.7% by weight, based on the polymer in the dispersion, of at least one anionic surface-active compound AO having at least one C -C alkyl group; the polymer powders obtainable by the process; and their use in binding mineral building materials.

Preparation of polymer powders

Aqueous polymer dispersions whose polymer is composed of up to &lt;5% by weight of (meth)acrylic acid, up to &lt;5% by weight of (meth)acrylamide and from 90 to 97.5% by weight of other nonionic unsaturated monomers and is present as dispersed polymer particles having a weight average diameter of from 100 to 300 nm are used for modifying mineral building materials.

Use of aqueous polymer dispersions for modifying mineral building

Growing community of inventors

Frankenthal, Germany

Rolf Gulden