C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 11/18 (2006.01)
Patent
CA 2583816
Aqueous suspension of particles of precipitated calcium carbonate meeting the following requirements: dp <= D50 <= q.dp where dp is the mean diameter of the particles (nm), measured by the Lea-Nurse method, D50 is the diameter of the particles (nm) for which 50 % of the distribution (measured by the sedimentation technique) is smaller and 50 % of the distribution is greater, q is a number between 1.0 and 20.0, and comprising an additive chosen from nonionic compounds comprising more than one carbon atom, the content of which, with respect to the calcium carbonate, is greater than 0.4 % by weight.
L'invention concerne une suspension aqueuse de particules de carbonate de calcium précipité satisfaisant aux exigences suivantes: dp = D50 = q.dp, formule dans laquelle dp est le diamètre moyen des particules (nm), tel que mesuré au moyen du procédé Léa-Nurse, D50 est le diamètre des particules (nm) pour lequel une proportion de 50 % de la distribution (mesurée au moyen de la technique de sédimentation) est plus petite et une proportion de 50 % de la distribution est plus grande, et q est un nombre compris entre 1,0 et 20,0. Cette suspension comprend un additif choisi parmi des composés non ioniques renfermant plus d'un atome de carbone, dont la proportion, par rapport au carbonate de calcium, est supérieure à 0,4 % en poids.
Cavalier Karine
Larche Francis
Ricaud Myriam
Rosa Roberto
Robic
Solvay (societe Anonyme)
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