Chryso

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Chryso S.a.s.

Chryso (s.a.)

Martin Mosquet

Olivier Malbault

Pierre Le Perchec

Emmanuel Villard

Isabelle Dubois-Brugger

Philippe Maitrasse

Horacio Naranjo

Yves Chevalier

Jean-Pierre Guicquero

David Rinaldi

Alexandre Desseroir

Rémi Barbarulo

Marcel Rayane

Christine Chaumilliat

Isabelle Dubois

Jean-Philippe Perez

Jean-Michel Laye

Emmanuel Faure

Mathieu Gratas

A method includes using a composition in the production of cement, the composition including at least one dispersing agent and at least one sacrificial molecule to partially or totally retain the properties of the dispersing agent; being either in the form of a liquid solution, or an emulsion or a suspension; the quantity of the sacrificial molecule in the composition representing at least 5% by mass of the mass of dispersing agent; and being introduced before or during the grinding of the clinker.

Protection of a dispersing agent during a grinding operation

The invention mainly relates to the use of a (co)polymer having a main chain essentially consisting of (meth)acrylic units and polyoxyalkylated side-chains containing statistically-distributed hydrophobic units as an adjuvant for lowering the viscosity of hydraulic compositions.

Viscosity-reducing super-plasticising copolymers

The invention relates to compositions intended to be applied to the surfaces of freshly poured mortars and/or concretes, before the beginning of the setting, in order simultaneously to prevent the evaporation of the water present in said mortars and/or concretes, which is necessary for their setting and then for their hardening, and in order to create, on said treated surfaces, high adhesiveness for the finishing materials intended to cover them, these compositions being provided in the form of aqueous emulsions comprising at least one paraffin wax (a), alone or in combination with at least one hydrocarbon compound (b) and/or with at least one other hydrocarbon compound (c) different from the hydrocarbon compound (b), and also comprising at least one latex (d) formed of a colloidal aqueous emulsion of at least one polymer, and at least one pulverulent inorganic or organic filler (e).

Treatment compositions for fresh concrete or mortar surfaces which offer improved adhesion capacity and water retention power

The invention relates to compositions intended to be applied to surfaces of freshly poured mortar and/or concrete mixes, before the start of setting, in order to prevent the evaporation of water needed for them to set and harden, which are distinguished by the fact that, for the purpose of making them synergistic with regard to water retention, they are composed, in the form of aqueous emulsions, of:

Compositions for curing mortar or concrete mixtures, ensuring water retention (during setting), and method therefor

The invention concerns the use of a selected polycarboxylic type dispersant for aqueous calcium sulfate hemihydrate compositions that, simultaneously with its dispersing action, can control the initial setting and/or final setting times for these compositions. The invention also concerns aqueous calcium sulfate hemihydrate compositions comprising a polycarboxylic type dispersant or a mixture of polycarboxylic type dispersants.

Use of dispersant for aqueous compositions of calcium sulphate hemihydrate

The invention relates to a hydroxide aqueous suspension of at least one selected transition element of which the potential oxidation reduction is less than that of the pair CrO/CrO(&#x2212;0.12 V) having a pH between 2 and 11, limits excluded, for reducing the content of chrome VI of cement to a value no greater than 2 ppm. The suspension is characterized in that it contains 0.5 to 80% by wt. of dry material of hydroxide of at least one transition element with regard to the quantity of water and in that it is stabilized by a hydrosoluble stabilizer. This suspension makes it possible to reduce the content of chrome VI of cements to a value no greater than 2 ppm.

Colloidal hydroxide aqueous suspension of at least one transition element serving to reduce chrome in cement

Thinners for aqueous suspensions of mineral particles and hydraulic

Process for the preparation of polyoxyalkylated amines

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Bourgoin-Jallieu, France

Martin Mosquet