HIGH REFLECTANCE POLYCARBONATE

In an embodiment, a polycarbonate composition comprises: polycarbonate; 7 to 20 wt% titanium dioxide, based upon a total weight of the polycarbonate composition; an optional flame retardant; and an optional UV stabilizer. A plaque formed from the polycarbonate composition has a reflectance of greate...

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Bibliographic Details
Main Author PAI-PARANJAPE, Vandita
Format Patent
LanguageEnglish
French
German
Published 09.01.2019
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC MACROMOLECULAR COMPOUNDS
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Summary:In an embodiment, a polycarbonate composition comprises: polycarbonate; 7 to 20 wt% titanium dioxide, based upon a total weight of the polycarbonate composition; an optional flame retardant; and an optional UV stabilizer. A plaque formed from the polycarbonate composition has a reflectance of greater than or equal to 95%, as determined by reflectance measurements using a Gretag Macbeth Coloreye spectrophotometer (D65 light source, 10 degree observer, UV included) made at a wavelength of 680 nm. In an embodiment, a polycarbonate composition comprises: a polycarbonate; 7 to 20 wt% titanium dioxide; a flame retardant; and an optional UV stabilizer; wherein the polycarbonate composition has a maximum reflectance of greater than or equal to 95%. The melt volume rate as determined at 300°C using a 1.2 kilogram weight, in accordance with ASTM D1238-04 is from 5 to 30 grams per 10 minutes.
Bibliography:Application Number: EP20130717668