COPOLYCARBONATE LENSES, METHODS OF MANUFACTURE, AND APPLICATIONS THEREOF

COPOLYCARBONATE LENSES, METHODS OF MANUFACTURE, AND APPLICATIONS THEREOF

A copolycarbonate lens formed from a polycarbonate composition comprising: a copolycarbonate comprising bisphenol A carbonate units and of phthalimide carbonate and optionally, a bisphenol A homopolycarbonate; wherein the second carbonate units are present in an amount of 18 to 35 mol % based on the...

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Bibliographische Detailangaben
Hauptverfasser: VAN HEERBEEK, Hendrikus Petrus Cornelis, EGGENHUISEN, Tamara Marijke, VAN DE GRAMPEL, Robert Dirk, ASSINK, Roland Sebastian, VAN DER MEE, Mark Adrianus Johannes, GONZALEZ VIDAL, Nathalie, SHAFAEI, Shahram, MICCICHE, Fabrizio, MITSUI, Kazuhiko, DE BROUWER, Johannes
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC MACROMOLECULAR COMPOUNDS
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Zusammenfassung:A copolycarbonate lens formed from a polycarbonate composition comprising: a copolycarbonate comprising bisphenol A carbonate units and of phthalimide carbonate and optionally, a bisphenol A homopolycarbonate; wherein the second carbonate units are present in an amount of 18 to 35 mol % based on the sum of the moles of the copolycarbonate and the bisphenol A homopolycarbonate, the copolycarbonate comprises less than 2 ppm by weight of each of an ion of lithium, sodium, potassium, calcium, magnesium, ammonium, chlorine, bromine, fluorine, nitrite, nitrate, phosphite, phosphate, sulfate, formate, acetate, citrate, oxalate, trimethylammonium, and triethylammonium, as measured by ion chromatography, and the polycarbonate composition has a bisphenol A purity of at least 99.7% as determined by high performance liquid chromatography. The polycarbonate composition has: a Vicat B120 of 155° C. or higher; and an increase in yellowness index of less than 10 during 1000 hours of heat aging at 155° C.