Bonding agent photosensitive

Hypericin from St. John s wort is another phenolic compound with multiple rings and multiple double bonds. This compound readily absorbs UV light and is a primary photosensitizing agent that will result in severe sunburn in species that either ingest the plant or come in contact with plant dust or leaf extracts. 

In cooxidation of alkenes and aldehydes, and in photosensitized epoxidations acyl peroxy radicals are the epoxidizing agents. The mechanism of the former oxidation, on the basis of kinetic measurements and the nonstereospecificity of the reaction, involves alkyl peroxy radicals formed through the cr-bonded radical 29 as the intermediate ... 

Much has already been published concerning the composition of energy-curable resin systems for use In coatings and Inks, and the basic approach to the development of such vehicles Is well known (Refs. 1, 2, 3). A typical formulation contains an oligomer, which may or may not contain reactive functional groups (e.g., double bonds), a cross-linking agent, a reactive diluent (for viscosity control), and a photosensitizer or photolnltlator. 

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