Chryso

Other

Lafarge

Philippe Maitrasse

Alexandre Desseroir

Martin Mosquet

Marc Lemaire

Frédéric Leising

Bruno Pellerin

David Rinaldi

Pierre Labourt-Ibarre

Horacio Naranjo

Florence Popowycz

Nicolas Noiret

Loic Lemiegre

Nathanael Olivi

Isabelle Dubois

The invention chiefly concerns a method for preparing polyalkoxylated polycarboxylates in which the following are caused to react in the presence of water and a catalyst at a temperature of between 120 and 250&#xb0; C.:

Method for preparing a superplasticizer

The invention relates mainly to a polymer comprising a hydrocarbon-based main chain bearing carboxylic groups and polyalkoxylated chains and up to 4% by weight of anti-oxidant groups, relative to the weight of the final polymer, grafted to the main chain. It also relates to a method for preparing such a polymer and to an admixture which is of use as a plasticizer of suspensions of mineral particles comprising same. Finally, it is related to the use of such a polymer for fluidifying suspensions of mineral particles and reducing the water demand of hydraulic compositions.

Dispersing polymers with improved thermal stability

The invention relates to a compound of following formula (I): the preparation method thereof and the use of same.

Plasticizers for aqueous suspensions of mineral particles and hydraulic binder pastes

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 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

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Chilleurs aux Bois, France

Philippe Maitrasse