Construction Research & Technology Gmbh

Hilti Aktiengesellschaft

Basf Aktiengesellschaft

Evonik Degussa Gmbh

Philipp Wieland

Harald Grassl

Kerstin Becher

Gerhard Albrecht

Alexander Kraus

Oskar Nuyken

Yvonne Heischkel

Beate Gnass

Thomas Bürgel

Jens Bunzen

Ulrich Fischer

Anna Sharmak

Sascha Dierker

Astrid Buder

Eva Jetzlsperger

Stefanie Scheul

Christian Hübsch

Christian Huebsch

Robert Dölle

Marcus Sch&auml;fer

Nicolas St&ouml;ckel

Robert DÖLLE

A method is useful for producing a urethane(meth)acrylate resin composition. The method improves storage stability and reduces the reactivity drift of the composition compared to compositions made by other means from the same starting materials. In particular, it reduces the degradation of TEMPOL in mixtures with branched urethane resins.

Method for producing a TEMPOL-containing urethane resin composition having an improved storage stability

Dispersion which is free of binders and which contains silica and at least one superplasticizer, the silica being a precipitated silica having a surface area greater than 50 m/g, the aggregates and/or agglomerates in the dispersion having a median diameter of less than 1 &#x3bc;m and the proportion of silica being from 5 to 50% by weight, based on the total amount of the dispersion, and a process for the preparation thereof and the use thereof as a concrete admixture in cement-containing preparations.

Aqueous dispersions of silica for increasing early strength in cementitious preparations

A two-component mortar compound including a curable resin component (A) that contains 30% to 45% by weight of at least one radically polymerizable resin, 30% to 45% by weight of fillers, 15% to 25% by weight of cement and 1% to 8% of a thickeners, and including a separately arranged so as to inhibit reaction curing component (B) that contains 1% to 20% by weight of a peroxide, 10% to 35% by weight of water, 40% to 80% by weight of fillers and 0.5% to 5% by weight of thickeners, with the proviso that the sum of the quantities of the constituents of the resin component or of the curing component is always 100% by weight, which is characterized in that the resin component (A) contains 0.01% to 5% by weight of an organic and/or inorganic acid and/or salts and esters thereof.

Two-component mortar compound and its use

Pulverulent polycondensation products are described, consisting of The pulverulent polycondensation products according to the invention are outstandingly suitable in construction material mixtures in an amount of from 0.1 to 5% by weight, based on the weight of the construction material. The pulverulent polycondensation products have a number of advantages here, such as, for example, excellent storage stability, good liquefying action at low dosage and industrially simple production.

Pulverulent polycondensation products

Disclosed is a polycondensation product that is a reaction product of A) an aromatic or heteroaromatic compound containing 5 to 10 C atoms or heteroatoms and is provided with an average of 1 to 300 oxyethylene groups and/or oxypropylene groups per molecule which are linked to the aromatic or heteroaromatic compound via an O atom or N atoms, and B) an aromatic compound and C) an aldehyde selected among the group of formaldehyde, glyoxylic acid, and benzaldehyde or mixtures thereof. Surprisingly, the inventive polycondensation product causes very good liquefaction of hydraulic binding agents, eg. Cement, resulting in substantially improved liquefaction of the construction material at a lower dose while pourability can be maintained over a longer period of time as opposed to naphthalene sulfonates or melamine sulfonates.

Polycondensation product based on aromatic or heteroaromatic compounds, method for the production thereof, and use thereof

Graft copolymers, their preparation and their use

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Munich, Germany

Philipp Wieland