DURCH AKTINISCHES LICHT POLYMERISIERBARE ZUSAMMENSETZUNG

摘要

An aromatic ketone photopolymerization activator is present in an actinic light curable composition containing organic polymerizable material containing a plurality of sites of ethylenic unsaturation. The composition is polymerized by exposing it to actinic light. Another aromatic ketone photopolymerization activator having a triplet energy in the range of from about 54 kilocalories per mole to about 72 kilocalories per mole and phenanthrenequinone are present in a second actinic light polymerizable coating composition containing organic polymerizable material containing a plurality of sites of ethylenic unsaturation and ultraviolet light absorbing hiding pigment. Coatings of the second coating composition are polymerized by exposing them to actinic light of a wavelength where absorption by the pigment is substantial and to actinic light of a wavelength where absorption by the pigment is insubstantial.