Patent ID: 7247262

Claim:
A photochromic polymeric composition comprising a polymer matrix and a photochromic compound which is an adduct comprising a photochromic moiety and at least one pendent group comprising at least one oligomer selected from the group consisting of polyether oligomers, polyalkylene oligomers, polyfluoroalkylene oligomers, polyfluoroalkylenyloxy oligomers, polydi(C 1 to C 10 hydrocarbyl)siloxane oligomers, polysilicene acid oligomers and derivatives thereof, poly(ZSi(OH) 3 ) oligomers and derivatives thereof, poly (ZSiCl 3 ) oligomers and derivatives thereof, poly(ZSi(OMe) 3 ) and mixtures thereof wherein Z is an organic group, wherein the photochromic compound is not reactive with the matrix so that it does not become covalently tethered to the polymer matrix.