David Hews - Belchertown MA, John Delude - Belchertown MA, Leo Moreau - Broad Brook CT, Dzu Luong - West Hartford CT, Edward D. Phillips - Oakville CT,
A radiation-cured, elastomeric, urethane acrylate polymer has an elongation at break of between 100% (50) and 400% and a film break strength of between 200 and 2,600 psi at a thickness between about 0.002 inches and 0.010 inches.
Benzanthrone Polymerization Gate In Photopolymerizable Compositions
Maria T. Sypek - Belchertown MA John R. Delude - Belchertown MA Paul A. Perron - Springfield MA
International Paper Company - Purchase NY
G03F 7016 G03F 709 G03F 730
A light sensitive composition which is capable of photopolymerization which includes a photopolymerizable compound a free radical generating component and a benzanthrone or substituted benzanthrone which substantially prevents photopolymerization when the light sensitive composition is exposed to actinic radiation below a threshold amount but permits photopolymerization when the light sensitive composition is exposed to actinic radiation above a threshold amount. This achieves a gate effect which eliminates or decreases unwanted partial exposure in the nonimage areas and hence improves reproduction quality.