Use of aluminate cements for controlling the rheology of...

Details Use of aluminate cements for controlling the rheology of... Use of aluminate cements for controlling the rheology of...

C - Chemistry, Metallurgy

09

K

C09K 8/16 (2006.01) C09K 8/26 (2006.01) C09K 8/32 (2006.01)

Patent

CA 2646950

The invention relates to the use of an aluminate cement component a) for controlling the rheology of liquid phases based on a clay component b). Preferably, the component a) is made of calcium-aluminate cements and b) clays of the smectite type. The use of component a), which should consist of at least one representative of calcium-aluminate cements in fractions of >= 50 wt.% and which is preferably used for controlling the rheology of water and/or oil based systems, permits a thixotropic thickened product, which is difficult to dilute, to be obtained whose end result can be compared to previously known additives based on, for example, mixed metal oxide/mixed metal hydroxide (MMO/MMH). The use of said invention enables an economical system, which uses a known compound class as an additive, to be produced and the desired effects can be obtained with reduced amounts of additives.

L'invention concerne l'utilisation d'un composant à base de ciments alumineux a) pour contrôler la rhéologie de phases liquides à base d'un composant argileux b). Le composant a) est constitué de préférence de ciments d'aluminates de calcium et le composant b) d'argiles de type smectique. L'utilisation du composant a), constitué dans une proportion supérieure ou égale à 50 % en poids d'au moins un représentant des ciments d'aluminates de calcium et utilisé de préférence pour contrôler la rhéologie de systèmes à base d'eau et/ou d'huile, permet d'obtenir un épaississement pseudoplastique et thixotrope pouvant être comparé à celui des additifs connus jusqu'à présent, tels que ceux à base d'oxyde métallique mixte/hydroxyde métallique mixte (MMO/MMH). L'utilisation selon l'invention permet de mettre à disposition un système économique qui s'utilise comme additif d'une classe connue de composés, les effets recherchés pouvant être déjà obtenus avec des quantités réduites d'additif.

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