Molecular level coating of metal oxide particles

C - Chemistry – Metallurgy – 09 – C

Patent

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C09C 3/10 (2006.01) A61K 8/11 (2006.01) A61K 8/25 (2006.01) A61K 8/28 (2006.01) A61K 8/29 (2006.01) A61K 8/34 (2006.01) A61K 8/88 (2006.01) A61K 8/92 (2006.01) A61Q 19/00 (2006.01) C08J 3/21 (2006.01) C08K 9/08 (2006.01) C08K 9/10 (2006.01) C08L 79/08 (2006.01) C09C 1/00 (2006.01) C09C 1/30 (2006.01) C09C 1/36 (2006.01) C09D 7/12 (2006.01) C09D 11/02 (2006.01) D01F 1/10 (2006.01) D01F 6/74 (2006.01) D21H 17/67 (2006.01) D21H 17/69 (2006.01) D21H 17/55 (2006.01)

Patent

CA 2270518

Polymer (24) encapsulated metal oxide particles (22) are prepared by combining a polyamide acid in a polar aprotic solvent with a metal alkoxide solution. The polymer was imidized and the metal oxide formed simultaneously in a refluxing organic solvent. The resulting polymer-metal oxide is an intimately mixed commingled blend, possessing synergistic properties of both the polymer and preceramic metal oxide. The encapsulated metal oxide particles have multiple uses including being useful in the production of skin lubricating creams, weather resistant paints, as a filler for paper, making ultraviolet light stable filled printing ink, being extruded into fibers or ribbons, and coatings for fibers used in the production of composite structural panels.

On prépare des particules (22) d'oxyde métallique, enrobées de polymère (24), en combinant un acide de polyamide placé dans un solvant polaire aprotique, avec une solution d'alcoxyde métallique. On a imidifié le polymère et on a formé simultanément l'oxyde métallique, dans un solvant organique porté à reflux. L'oxyde polymère-métal résultant est un mélange, intimement amalgamé et mélangé, possédant les propriétés synergiques à la fois du polymère et de l'oxyde métallique pré-céramique. Ces particules d'oxyde métallique enrobées sont utiles dans de multiples applications, notamment dans la production de crèmes hydratantes pour la peau et de peintures résistantes aux intempéries, en tant que charge pour papier, dans la fabrication d'encre d'impression comportant une charge et stable à la lumière ultraviolette, ces particules étant extrudées sous forme de fibres ou de rubans et les revêtements destinés à ces fibres pouvant être utilisés dans la production de panneaux structuraux composites.

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