Sulphur compounds coated with a zinc compound for use as...

C - Chemistry – Metallurgy – 09 – C

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C09C 3/06 (2006.01) C08K 9/02 (2006.01) C09C 1/00 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2235717

A composition containing a sulphur compound, zinc and optionally a transparent oxide, a preparation method therefor, and the use thereof as a pigment, are disclosed. The composition includes a carrier consisting of at least one sulphur compound, and a zinc compound deposited on the carrier and produced by reacting a zinc precursor with ammonia and/or an ammonium salt. The composition may further include a layer consisting of at least one transparent oxide deposited on the surface of the carrier and/or fluorine atoms. In particular, said composition may be prepared by means of a method in which the carrier is contacted with a zinc precursor, ammonia and/or an ammonium salt and optionally a precursor of the transparent oxide and a fluorinating agent, the zinc compound is deposited on the carrier, and the transparent oxide is optionally deposited on said carrier.

La présente invention concerne une composition à base d'un composé soufré, de zinc et éventuellement d'un oxyde transparent, son procédé de préparation et son utilisation comme pigment colorant. La composition de l'invention est caractérisée en ce qu'elle comprend un support à base d'au moins un composé soufré et un composé du zinc déposé sur le support et obtenu par réaction d'un précurseur du zinc avec de l'ammoniaque et/ou un sel d'ammonium. Elle peut comprendre en outre une couche à base d'au moins un oxyde transparent déposée à la surface du support et/ou des atomes de fluor. Elle peut être préparée notamment par un procédé dans lequel on met en contact le support, un précurseur du zinc, de l'ammoniaque et/ou un sel d'ammonium et, le cas échéant, un précurseur de l'oxyde transparent et un agent fluorant, et on dépose le composé de zinc sur le support et, le cas échéant, on précipite l'oxyde transparent sur ledit support.

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