Lord Corporation

John R McDowell

Dennis D Howard

Vincent J Pascarella

Acyloin urethans can be employed to effect photopolymerization of free radical-polymerizable compositions in inert and oxygen-containing atmospheres.

Photoinitiation systems for free radical polymerization reactions

Acyloin urethanes can be employed to effect photopolymerization of free radical-polymerizable compositions in inert and oxygen-containing atmospheres.

Radiation curable compositions containing acyloin urethane compounds

The gloss of energy-curable coating and ink compositions is reduced by exposing such compositions to actinic radiation in an oxygen-rich atmosphere at differential intensity levels. The intensities are selected to effect at a first intensity range substantially complete cure of the composition except for the surface, with final cure of the surface being effected subsequently at a different and higher intensity range. Gradient Intensity Cure can be employed with substantially any composition which is curable by free radical-induced addition polymerization using a photosensitizer-photoinitiator photocatalyst system.

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Erie, PA, United States of America

John R McDowell