Patent ID: 8048217

Claim:
Powdery composition which includes as a first component a calcic compound complying with formula I x CaA.(1 −x )[ y MgA+(1 −y )MgO], (I) in which A is a ═(OH) 2 or ═CO 3 group, and x and y are molar fractions where 0<x<1 and 0<y<1, and which includes as a second component in the powdery composition a quantity of a mineral solid flow agent in the form of particles having a size greater than 90 μm, said quantity of mineral solid flow agent being greater than zero and less than 5% by weight of the powdery composition; wherein the calcic compound which is included as the first component of the powdery composition has a particle size less than 250 μm; and characterized in that the mineral solid flow agent is attapulgite.