Substrate having an adherent photo-product coating on its surfac

Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...

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134 26, 20415775, 427 531, 428426, 428432, 428469, 428524, 522173, 522178, 528126, 528128, B08B 300, C08F 248, C08G 216

Patent

active

047938641

ABSTRACT:
This invention relates to a natural or synthetic gemstone or mineral substrate having on its surface an adherent photo-product coating, and a method for coating that substrate, which coating is formed by exposing to light in the presence of an oxygen source, a reactant mixture comprising: 2,2'4,4'-tetrahydroxybenzophenone, with (1) ammonium hydroxide and optionally a trace amount of at least one reactive metal, or (2) ammonium hydroxide and at least one metal salt, or (3) at least one metal salt and at least one amine, or (4) ammonium hydroxide, at least one metal salt and at least one amine; in a suitable solvent.

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BASF Wyandotte Corporation Technical Data, "UNIMAL UV Absorbers, for Cosmetics, Plastics, Coatings, Textiles".

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