G - Physics – 03 – F
Patent
G - Physics
03
F
402/3, 400/5150,
G03F 7/031 (2006.01) B05D 3/06 (2006.01) C08F 2/50 (2006.01) C08F 299/04 (2006.01)
Patent
CA 1204016
ABSTRACT OF THE DISCLOSURE 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 wave- length where absorption by the pigment is insubstantial.
270745
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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