B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 13/00 (2006.01) A61K 8/04 (2006.01) B01F 17/00 (2006.01)
Patent
CA 2396057
The invention concerns an aqueous colloidal dispersion of the aqueous colloidal nanometric type wherein the mean colloidal particle diameter is not more than 6 nm, said dispersion comprising: (1) at least a metal M compound, said metal M being a majority metal in the dispersion, selected among the group consisting of aluminium, zirconium and metals or the periodic table whereof the atomic number is between 22 and 31; and (2) at least a complexing agent having a pKs(M) (cologarithm of the dissociation constant of the complex formed by the complexing agent and the cation of said metal M) more than 2. The invention also concerns the method for preparing said dispersion. The resulting dispersion can in particular be used for preparing anti-UV filters, in catalysis, or as reinforcement of polymeric or mineral matrices.
L'invention concerne une dispersion colloïdale aqueuse de type nanométrique colloïdale aqueuse au sein de laquelle le diamètre moyen des particules colloïdales est au plus de 6nm, ladite dispersion comprenant: (1) au moins un composé d'un métal M, ledit métal M étant un métal majoritaire au sein de la dispersion, choisi dans le groupe constitué de l'aluminium, du zirconium et des métaux de la classification périodique dont le numéro atomique est compris entre 22 et 31; et (2) au moins un complexant présentant un pK s(M)(cologarithme de la constante de dissociation du complexe formé par le complexant et le cation dudit métal M) supérieur à 2. L'invention concerne également le procédé de préparation de cette dispersion. La dispersion ainsi obtenue peut notamment être utilisée dans la préparation de filtres anti-UV, en catalyse, ou encore comme renfort de matrices polymères ou minérales.
Rhodia Chimie
Robic
LandOfFree
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