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Rhodia Chimie

Centre National De La Recherche Scientifique

Total Research & Technology Feluy

Corine Gerardin

Jean-Pierre Dath

Delphine Minoux

Sander Van Donk

Mathias Destarac

Jean-Yves Chane-Ching

Marie-Pierre Labeau

Xiaowei Cheng

Olivier Anthony

François Fajula

Martin In

Nathalie Cadena

Laura Vaugon

A subject matter of the invention is a process for the preparation of particles comprising at least one metal ion, which comprises the stage of bringing into contact a precursor a metal cation, optionally partially hydrolyzed, with at least one water-soluble comb copolymer. Likewise, a subject matter of the invention is particles capable of being prepared according to the process of the invention, said particles exhibiting a mean size of between 2 and 500 nm and preferably between 2 and 300 nm. Finally, it relates to the use of such particles in the mechanical polishing of hard objects, in the preparation of pigments or mixed ceramics for the electronic industry, in the reinforcing of polymeric matrices, in fungicidal or biocidal dispersions, in the scavenging of sulfur derivatives or the scavenging of unpleasant smells.

Preparation of particles by hydrolysis of a metal cation in the presence of a polymer

Process for preparing mineral particles in the form of colloids in aqueous dispersion of controlled size from a precursor, comprising: a) the step of putting the said precursor, which is a mineral salt of a metal cation, into aqueous solution; b) the complexation of the product obtained in a) with at least one water-soluble block copolymer having at least one complexing anionic hydrophilic block and at least one stabilizing nonionic hydrophilic block; and c) the partial or complete hydrolysis of the said precursor in order to obtain controlled growth of the mineral particles in the form of an aqueous dispersion. Use of said colloids, especially as reinforcing fillers for a polymer.

Process for preparing colloids of particles coming from the hydrolysis of a salt of a metal cation

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Saint Georges d'Orques, France

Corine Gerardin