Construction Research & Technology Gmbh

Skw Polymers Gmbh

Uwe Holland

Michael Schinabeck

Stefan Friedrich

Manfred Schuhbeck

Michael Eberwein

Johann Plank

Werner Stohr

Thomas Pfeuffer

Joachim Riedmiller

Patrick Weiss

Martin Matzinger

Thomas Schuhbeck

Andreas Eisenreich

Sergi Vilches

Andres Fernandez

Josep Gatell

Peter Gäberlein

Peter Gâberlein

Christian Huber

Matthias Degenkolb

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

A formwork release composition containing formwork release oil, which contains a hydrophobic metal oxide and/or metal sulphide component is disclosed. Photocatalytically active compounds, such as particular semiconductors and in particular TiO, are particularly suitable. The invention also concerns the use of the formwork release composition for producing exposed concrete. The concrete and mortar products thus produced are characterized by a homogeneous surface with self-cleaning properties that gives an enhanced resistance against weathering and a much longer lasting brilliance and whiteness.

Formwork release composition and use thereof

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

The invention relates to water-soluble copolymers used as water retention agents, stabilizers and rheology modifiers in aqueous building material systems based on hydraulic binders such as cement, lime, plaster, anhydrite etc. and in water-based paint and coating systems. The inventive copolymers are highly effective water retention agents even when used in relatively small amounts. They also exhibit excellent air pore stability and adhesiveness. They can also be used as stabilizers in building material and paint systems.

Water-soluble copolymers containing sulfo groups, method for the production and use thereof

Sulfonated condensation products that are stable in storage and have increased thermal stability are based on aminoplastic formers having at least two amino groups or naphthalene and formaldehyde and, optionally include organic nitrogen bases which additionally contain, as nitrogenous formulation auxiliary agents, compounds of general formula (I) R&#x2014;NH&#x2014;X&#x2014;Y&#x2014;R, wherein Rand Rindependently represent H, &#x2014;CH, &#x2014;CH, &#x2014;CH, &#x2014;(CH)&#x2014;CH&#x2014;; X&#x2550;&#x2014;CH, CO, CS; Y&#x2550;S, NH, &#x2014;(CH)&#x2014;; n=0 to 9; m=1 to 4; and/or compounds of general formula (II),

Sulfonated condensation products which are stabile in storage, method for the production thereof, and their use

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Wehringen, Germany

Uwe Holland