Other

Akzo Nobel N.v.

Akzo Nobel Chemicals International B.v.

Franck Vallée

Hongli Willimann

Thomas Aberle

Paul Emmenegger

(Andrei) Andrey P Pustovgar

Dominique Schaub

Charles Zhang

Andrei P Pustovgar

The present invention relates to the use of a solid comprising at least one organosilane and a carrier material to hydrophobise mortars, wherein the organosilane has the formula RSi(OR')or RRSi(OR&#x2032;)wherein Rand Rare the same or different and are a linear or branched C- to C-alkyl and/or alkenyl group, OR&#x2032; is an acetoxy, a C- to C-alkoxy and/or a C- to C-methoxyalkoxy and/or ethoxyalkoxy group, and the carrier material is a solid at room temperature. The amount of cement in the final formulation is zero or less than 5 wt.-%, based on the total weight of the final formulation in the dry and uncured form. Claimed are also a powder comprising the silane and a carrier with the carrier being a water-soluble polymer, dry mortar formulations containing no or less than 5 wt.-% cement, based on the dry weight of the uncured mortar formulation, as well as processes to manufacture the formulations and/or compounds.

Powder to hydrophobise and its use

The present invention pertains to a dry cement formulation for cementing earth boreholes, in particular oil, gas and/or terrestrial heat boreholes, containing a) about 20 to 99.9 wt. % cement, b) about 0 to 65 wt. % powdered quartz/or quartz dust, c) about 0.1 to 30 wt. % water-redispersible dispersion powder, and d) about 0 to 20 wt. % further additives. Furthermore, the invention pertains to the use of the dry cement formulation for preparing a cement slurry as well as to the use of water-redispersible dispersion powders in a cement slurry for cementing earth boreholes, wherein the cement slurries can be used for reducing the water loss of the cement slurry, for reducing the gas and/or water penetration and/or for sealing off the gas and/or water channels by means of the cement slurry which has been introduced into the borehole and has set.

Dry cement formulation for cementing holes in the earth

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Huningue, France

Franck Vallée