Photochromic compositions, preparation thereof and articles made therefrom or coated therewith
AssigneeCorning Incorporated
InventorsDavid Henry, Cecile Lecrivain
Life of this patent
Estimating the term…
Abstract
The present invention relates to novel cross-linkable or crosslinked photochromic compositions, articles made from or coated with the compositions and method of making the compositions. The compositions contain (i) at least one segmented or non-segmented polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group; and (ii) an effective amount of at least one photochromic organic compound, advantageously selected from spiroxazines, chromenes, spiropyrans fulgides and fulgimides.
Claims19
A cross-linkable photochromic composition, comprising:
- at least one segmented or non-segmented polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group;
- and
- an effective amount of at least one photochromic organic compound.
A method of preparing a photochromic composition comprising mixing the following:
- at least one polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group;
- an effective amount of at least one photochromic organic compound;
- optionally, at least one additional unsaturated monomer;
- optionally, an effective amount of at least one radical polymerisation initiator;
- and
- optionally, an effective amount of an inert solvent.
Dependencies are inferred from the claim text.