08064140 is referenced by 5 patents and cites 12 patents.

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 C20-44 aliphatic 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.

Title
Transparent articles prepared from thermoplastic compositions having low birefringence
Application Number
12/879494
Publication Number
8064140 (B2)
Application Date
September 10, 2010
Publication Date
November 22, 2011
Inventor
Michael Teruki Takemori
Rexford
NY, US
Edward Kung
West Chester
PA, US
Dennis Karlik
Bergen op zoom
NL
Jan Henk Kamps
VR Bergen op Zoom
NL
Theodorus Lambertus Hoeks
Bergen op Zoom
NL
Agent
Cantor Colburn
Assignee
Sabic Innovative Plastics IP
NL
IPC
G02B 7/00
G02B 3/00
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