Colloidal particle sols, methods for preparing and curable...

B - Operations – Transporting – 01 – J

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B01J 13/00 (2006.01)

Patent

CA 2610882

Methods of preparing an organic sol of particles are provided. Steps include providing a suspension of particles in an aqueous medium; adding a first organic liquid compatible with the aqueous medium to form an admixture; reacting the particles with a first and a second modifying compound; adding a second organic liquid compatible with the liquid portion of the admixture wherein the second organic liquid is different from the first organic liquid; and maintaining the admixture at a temperature and pressure and for a time sufficient to substantially remove the water and the first organic liquid. Also provided are curable film-forming compositions containing sols of particles prepared by the methods of the present invention.

L'invention porte sur des procédés de préparation d'un sol organique de particules. Lesdits procédés consistent à former une suspension de particules dans un milieu aqueux; à ajouter un premier liquide organique compatible avec le milieu aqueux pour obtenir un mélange; à faire réagir les particules avec un premier et un deuxième composé de modification; à ajouter un deuxième liquide organique compatible avec la partie liquide du mélange, le deuxième liquide organique étant différent du premier liquide organique; et à maintenir le mélange à une température et à une pression pendant un laps de temps suffisant pour éliminer sensiblement l'eau et le premier liquide organique. L'invention concerne également des compositions filmogènes durcissables contenant des sols de particules préparés au moyen des procédés de l'invention.

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