Inventors:
Theodorus Lambertus Hoeks - Bergen op Zoom, NL
Jan Henk Kamps - VR Bergen op Zoom, NL
Dennis Karlik - Bergen op zoom, NL
Edward Kung - West Chester PA, US
Michael Teruki Takemori - Rexford NY, US
Assignee:
Sabic Innovative Plastics IP B.V.
International Classification:
G02B 3/00
G02B 7/00
US Classification:
359642, 524502, 524599, 525410, 525418, 525474, 528196, 528198, 528271, 528272
Abstract:
An optical grade article comprises a thermoplastic composition comprising a poly(aliphatic ester)-polycarbonate copolymer comprising 10 to 25 wt % of a soft block ester unit derived from a Caliphatic dicarboxylic acid or derivative thereof, 34 to 77 wt % of a carbonate unit derived from 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, 0 to 76 wt % of a carbonate unit derived from a dihydroxyaromatic compound not identical to the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the weight percentages of soft block ester units, 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine units, and dihydroxyaromatic compound units is 100 weight percent of the monomeric units of the poly(aliphatic ester)-polycarbonate, the refractive index of the thermoplastic composition is greater than 1. 590, and the glass transition temperature of the poly(aliphatic ester)-polycarbonate is from 120 to 155 C. A camera lens also comprises the poly(aliphatic ester)-polycarbonate.