Basf Se Corporation

Construction Research & Technology Gmbh

Basf Construction Solutions Gmbh

Basf Construction Additives Gmbh

Christoph Hesse

Manfred Bichler

Luc Nicoleau

Joachim Dengler

Torben Gaedt

Gerhard Albrecht

Torben Gädt

Mario Vierle

Michael Kutschera

Oliver Mazanec

Alexander Kraus

Michael Schinabeck

Klaus Lorenz

Martin Winklbauer

Hubert Leitner

Sabrina Montero Pancera

Eva Jetzlsperger

Niklas Loges

Thomas Wohlhaupter

Reinhard Dorfner

Dirk Schmitt

Siegfried Zuern

Sebastian Seufert

Daniel Fridrich

Michael Braeu

Stefan Friedrich

Christian Scholz

Bernhard Feichtenschlager

Radoslaw Kierat

Klaus Seip

Alexander Assmann

Michael Dietzsch

Jutta Karin Langlotz

Nina Susanne Hillesheim

Maria Becker

Attila Dal

Siegfried Zürn

Christian Biro

Dunja Hirsemann

Bernhard Mayr

Michael Bräu

Michael BRÄU

Eva Scholz

The present invention relates to a process for producing calcium silicate hydrate under hydrothermal conditions, wherein an organic compound is added in at least one of the process steps and wherein the organic compound has a molecular weight of 100 to 600 g/mol and from 0.02 to 0.035 functional groups per gram of the organic compound, wherein the functional groups being selected from —OH, —COOH, —COOM, —SOH or —SOM, or —C(═O)H, wherein M is hydrogen, a mono-, di- or trivalent metal cation, ammonium ion or an organic amine radical and a is ⅓, ½ or 1. Further the invention is directed to the calcium silicate hydrate produceable according to the process of the present invention and its use as curing accelerator for hydraulic binders.

Process for producing calcium silicate hydrate

A curing accelerator composition for building chemical mixtures comprises a mineral constituent and a polymeric water-soluble dispersant. The mineral constituent comprises a semi-ordered calcium silicate hydrate having an apparent crystallite size of 15 nm or less and less than 35% by weight of crystalline phases other than the semi-ordered calcium silicate hydrate. The composition displays a more pronounced accelerating effect than comparative compositions in which the mineral component comprises a calcium silicate hydrate having a higher degree of crystallinity.

Composition containing a semi-ordered calcium silicate hydrate

The present invention relates to a mixture comprising at least one compound comprising an &#x3b1;-hydroxy-carboxylic unit, &#x3b1;-hydroxy-sulfonic acid unit or &#x3b1;-carbonyl-carboxylic unit and at least one water-soluble organic carbonate. The mixture is useful as a hydration control agent in construction chemical compositions comprising an inorganic binder.

Hydration control mixture for mortar and cement compositions

The present invention relates to construction chemical compositions comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder. The composition is useful as a hydration control agent of the inorganic binder.

Construction chemical compositions comprising a bisulfite adduct of glyoxylic acid

The invention relates to a process for producing a composition suitable as accelerator for the curing of cement, by contacting the components aa) at least one component selected from the series of hydraulic binders and/or latent hydraulic binders, and bb) at least one dispersant suitable for the dispersing of inorganic particles in water, and cc) water, the weight ratio of components aa) to cc) being between 1.5:1 and 1:70, wherein the rate ratio of components aa) to bb) is between 20:1 and 1:2. In addition, the use of the composition obtained as hardening acceleration for chemical mixtures in construction is disclosed.

Accelerator composition

The invention relates to a method for producing a calcium silicate hydrate-comprising hardening accelerator in powder form, which comprises the steps of The invention also relates to the hardening accelerator obtainable by this method, to the use thereof, and to building material mixtures which comprise the hardening accelerator.

Method for producing a calcium silicate hydrate-comprising hardening accelerator in powder form

Fibers with crystallization seeds attached to its surface, method of making such composite fibers by surface treatment of fibers followed by either treating such fibers with premade crystallization seeds or by precipitation and direct crystallization of seeds onto pretreated fibers. Controlling and tuning the properties of inorganic binder compositions with fiber-bound crystallization seeds and thereby generating inorganic binder compositions with tailor-made characteristics.

Fibers, methods for their preparation and use in the manufacture of reinforced elements

The invention relates to a composition comprising 5-50 wt % of calcium silicate hydrate, 10-60 wt % of at least one water-soluble, acid group-containing polymer comprising polyether groups, and 5-40 wt % of at least one polyalkylene glycol ether. Further disclosed is a process for preparing this composition, and cementitious mixtures comprising the composition. A further aspect of the present invention is the use of the composition of the invention in cementitious mixtures for accelerating the development over time of the dispersing action of the acid group-containing polymer after addition of the mixing water and a subsequently accelerated curing of the mixture.

Composition based on calcium silicate hydrate

The present invention relates to a construction chemical composition comprising Portland cement, a water retention agent, a dispersing agent, and a hardening accelerator comprising calcium-silicate-hydrate, as well as a mortar composition containing said construction chemical composition. Although the composition is based on Portland cement it has a pull-off strength after 6 h meeting the DIN requirements and can therefore be used as a fast setting tile mortar.

Construction chemical composition for tile mortar

The invention relates to an additive which can be used as a hardening accelerator for hydraulically setting compositions, comprising a) at least one polymeric dispersant comprising structural units having anionic or anionogenic groups and structural units having polyether side chains, b) at least one sulfonic acid compound of the formula (I) in which Ais NH, NHMe, NMe, N(CH&#x2014;CH&#x2014;OH), CH, CH, CH&#x2014;CH&#x2014;OH, phenyl, or p-CH-phenyl and Kis an alkali metal cation, or one equivalent of a cation selected from Ca, Mg, Sr, Ba, Zn, Fe, Fe, Al, Mn, or Cu, and c) calcium silicate hydrate particles.

Additive for masses that set hydraulically

The invention concerns a process for the preparation of a calcium silicate hydrate and ettringite containing hardening accelerator composition by reaction of a water-soluble calcium compound, silicate compound, aluminum compound and a sulfate compound, wherein the molar ratio of silicon to sulfate is from 2/1 to 30/1 and the reaction of the four compounds being carried out in the presence of an aqueous solution which contains a comb polymer suitable as a plasticizer for hydraulic binders. Also concerned are the use of said accelerators in building material mixtures, the building material mixtures containing said accelerators and a process for the preparation of a sprayable binder composition in which said accelerators are used.

Hardening accelerator containing ettringite and calcium silicate hydrate

The invention relates to a process for the preparation of a hardening accelerator composition by reacting a calcium source selected from calcium hydroxide, calcium oxide with a water-soluble silicate compound in the presence of at least one water-soluble polymeric dispersing agent and the hardening accelerator composition obtainable by said process. The composition has a low content of anions and of alkali cations and is therefore broadly applicable in building material mixtures.

Hardening accelerator composition

A process for producing solid compositions containing calcium silicate hydrate (C&#x2014;S&#x2014;H) and a water-soluble comb polymer which is suitable as plasticizer for hydraulic binders, wherein the following process steps are carried out: a) contacting of an aqueous C&#x2014;S&#x2014;H-containing suspension with at least one comb polymer, b) optionally setting a suitable solids content of the product from step a) by dilution with water and c) drying of the product from step a) or b). The process products which can be obtained, the use thereof in building material mixtures, in particular, containing cement, the use as grinding aid in the production of cement and corresponding building material mixtures are likewise provided.

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 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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Ebersberg, Germany

Christoph Hesse