Silicone polymer-coated hydrophobized metal oxides

C - Chemistry – Metallurgy – 09 – C

Patent

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C09C 3/12 (2006.01) C07F 7/08 (2006.01)

Patent

CA 2236593

A process for making metal oxide hydrophobic by coating the metal oxide with a silicone polymer is disclosed. The hydrophobic metal oxide is prepared by contacting the metal oxide with a reactive silicone compound and then in a subsequent step the coated metal oxide is heated to 40 to 100 °C for between 1 and 10 hours. The resulting metal oxide is hydrophobic, non-reactive, not affected by water and can be applied to the skin for protection from ultraviolet light of the sun.

Procédé permettant de rendre un oxyde métallique hydrophobe, qui consiste à recouvrir ledit oxyde métallique à l'aide d'un polymère de silicone. L'oxyde métallique hydrophobe est préparé par mise en contact de l'oxyde métallique avec un composé de silicone réactif, et dans une étape ultérieure, l'oxyde métallique pourvu d'un revêtement est chauffé à une température située entre 40 et 100 DEG C pendant une durée de 1 à 10 heures. L'oxyde métallique qui en résulte est hydrophobe, non réactif, n'est pas affecté par l'eau et peut être appliqué sur la peau à titre de protection contre les rayons solaires ultraviolets.

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