Patent ID: 8129471

Claim:
A composition comprising: a polycarbonate comprising units derived from a bisphenol cyclohexylidene of the formula: wherein R c1 and R d1 are each independently C 1-12 alkyl, R c2 and R d2 are each independently hydrogen or C 1-12 alkyl, R g is C 1-12 alkyl or halogen, and t is 0 to 10; a poly(ether-ester) copolymer comprising 40 to 60 wt % of polyester hard block units derived from a C 6 -C 24 aromatic dicarboxylic acid or a C 6 -C 24 alicyclic dicarboxylic acid and at least one glycol component, wherein when the C 6 -C 24 aromatic dicarboxylic acid comprises terephthalic acid, isophthalic acid groups are present in an amount from 0 to 30 mole %, based on the total moles of isophthalic acid groups and terephthalic acid groups in the hard block units, and 40 to 60 wt % of polyether soft block units derived from poly(oxytetramethylene) glycol, wherein the molecular weight of the poly(oxytetramethylene) glycol groups is from 300 to 1800 Daltons; and a photochromic dye: wherein the composition has at least 20% ductility as determined using molded 3.2 mm thick bars according to ASTM D256-02 and measured at 23° C.; and the composition has less than or equal to 20% haze as determined using a molded sample having a thickness of 3.18±0.12 mm according to ASTM D1003-00.