Procedure for preparing a photochromic compound, the...

Details Procedure for preparing a photochromic compound, the... Procedure for preparing a photochromic compound, the...

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C09C 1/00 (2006.01)

Patent

CA 2233267

This invention involves a heat treatment procedure for preparing a photochromic compound in the presence of a metallic constituent such as an oxide or hydroxide of lithium, sodium and/or potassium. The invention also involves the photochromic compound containing the metal oxide, hydrated metal oxide or metal oxide complex and/or hydrated metal that can be formed by this process, and the cosmetic formulation containing it.

La présente invention concerne un procédé de préparation d'un composé photochrome par traitement thermique en présence d'un composant métallique tel qu'un oxyde ou hydroxyde de lithium, de sodium et/ou de potassium. L'invention concerne également le composé photocrome de type oxyde métallique, hydrate d'oxyde métallique ou complexe oxyde et/ou hydrate métallique, susceptible d'être obtenu par ce procédé, et la composition cosmétique le comprenant.

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