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.