Construction Research & Technology Gmbh

Siegfried Zuern

Gerhard Albrecht

Klaus Lorenz

Christoph Hesse

Luc Nicoleau

Mario Vierle

Michael Kutschera

Hubert Leitner

Sabrina Montero Pancera

Reinhard Dorfner

Dirk Schmitt

Thomas Wohlhaupter

Eva Jetzlsperger

Daniel Fridrich

Michael Braeu

Werner Stohr

Steffen Wache

Wolfgang Seidl

Klaus-Dieter Hötzl

Klaus-Dieter Hoetzl

Michael Bräu

Eva Scholz

The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound and by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, in both cases the reaction being carried out in the presence of a polycondensate containing at least one structural unit consisting of an aromatic or heteroaromatic moiety bearing a polyether side chain and at least one structural unit consisting of an aromatic or heteroaromatic moiety bearing at least one phosphoric acid ester group and/or its salt. The invention concerns a composition of calcium silicate hydrate and the polycondensate, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.

Hardening accelerator composition containing phosphated polycondensates

The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound and a process for the preparation of a hardening accelerator composition by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders. The invention concerns also a composition of calcium silicate hydrate and comb polymer, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.

Plasticizer-containing hardening accelerator composition

The invention relates to a pulverulent building material composition, preferably a factory dry mortar and in particular a tile adhesive, joint grout, knifing filler, sealing slurry, repair mortar, equalization mortar, basecoat adhesive, adhesive for composite thermal insulation systems (CTISs), mineral plaster or render, fine knifing filler or screed system, containing an ester of A) at least one compound selected from the group consisting of neopentyl glycol, 2-methyl-2-(hydroxymethyl)-1,3-propanediol and pentaerythritol with B) a carboxylic acid component.

Dust free powdery building material composition

Growing community of inventors

Eurasburg, Germany

Siegfried Zuern