Compositions and methods incorporating photocatalysts

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/34 (2006.01) A61K 8/36 (2006.01) A61K 8/40 (2006.01) A61K 8/49 (2006.01) A61K 8/73 (2006.01) A61K 8/81 (2006.01) A61Q 3/00 (2006.01) A61Q 5/00 (2006.01) A61Q 19/00 (2006.01)

Patent

CA 2724264

The various embodiments provide a composition including an active material having functional groups capable of covalent attachment to a substrate in the presence of an acid or a base, a photocatalyst capable of generating an acid or a base upon exposure to light, and a vehicle. The compositions may also include surfactants, emulsifiers, oxidants, and other components. A method for treating a substrate is also disclosed. The method includes the steps of applying at least one active material having functional groups to the substrate, applying a photocatalyst to the substrate, and exposing the photocatalyst and the at least one active material to light for forming covalent attachments between the functional groups and constituent groups on the substrate. The compositions and methods described herein are useful in personal care product and consumer care product applications, for example.

Les divers modes de réalisation portent sur une composition comprenant une matière active ayant des groupes fonctionnels capables d'une liaison covalente à un substrat en présence d'un acide ou d'une base, un photocatalyseur capable de générer un acide ou une base lors de l'exposition à la lumière et un véhicule. Les compositions peuvent également comprendre des agents tensioactifs, des émulsifiants, des oxydants et autres composants. L'invention porte également sur un procédé pour traiter un substrat. Le procédé comprend les étapes consistant à appliquer au moins une matière active ayant des groupes fonctionnels au substrat, appliquer un photocatalyseur au substrat et exposer le photocatalyseur et la au moins une matière active à la lumière pour former des liaisons covalentes entre les groupes fonctionnels et des groupes constituants sur le substrat. Les compositions et les procédés décrits ici sont utiles dans des applications de produits de soins personnels et de produits de soins de consommateur, par exemple.

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