Compositions and methods incorporating photocatalysts

摘要

The present invention includes compositions comprising an active material having 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. Also included herein is a method for treating a substrate with these compositions. 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 consumer care and personal care product applications.

主权项

1. A consumer care composition for treating a substrate comprising:
(a) an active material that in the presence of an acid or a base has one or more functional groups forming covalent attachments to the substrate's complementary functional groups; (b) a photocatalyst capable of generating an acid or a base upon exposure to light, wherein the photocatalyst absorbs light within electromagnetic spectrum from infrared to visible and to ultraviolet light, from 1200 nm to 200 nm, and wherein the photocatalyst is a photoacid selected from the group consisting of aromatic hydroxyl compounds, sulfonated pyrene compounds, onium salts, diazomethane derivatives, bissulfone derivatives, disulfuno derivatives, nitrobenzyl sulfonate derivatives, sulfonic acid ester derivatives, sulfonic acid esters of N-hydroxyimides, and combinations thereof; and (c) a delivery vehicle for the combination of elements 1(a) and 1(b);wherein the substrate excludes physiological materials.