Articles having a photochromic polymeric coating
AssigneeTransitions Optical, Inc.
InventorsCletus N. Welch, Eric M. King, Lawrence G. Anderson, Randy E. Daughenbaugh, Kevin J. Stewart
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Abstract
Described is a photochromic article that includes a substrate and at least a partial coating of an at least partially cured polymerizable composition of a photochromic amount of at least one photochromic compound, at least one material having at least one carbonate group and at least one hydroxyl group, and at least one monoisocyanate containing material having at least one unsaturated group. Also described are photochromic optical elements such as ophthalmic lenses, prepared from an optical element substrate coated with the photochromic polymerizable composition.
Claims32
A photochromic article comprising a substrate and an at least partial coating of an at least partially cured polymerizable composition comprising a photochromic amount of at least one photochromic compound, at least one material comprising at least one carbonate group and at least one hydroxyl group and at least one monoisocyanate containing material having at least one unsaturated group, said photochromic article being adapted to provide a reduction in the percent fatigue of the photochromic compound in an Accelerated Weathering Photochromic Percent Photopic Fatigue Test.
A photochromic article comprising a substrate and an at least partial coating of an at least partially cured polymerizable composition comprising:
- a) a reaction product of a polyol comprising at least one carbonate group and an isocyanate comprising one reactive isocyanate group and at least one polymerizable double bond;
- and
- b) a photochromic amount of at least one photochromic compound.
Dependencies are inferred from the claim text.