ARYL BENZOFURANONE- STABILIZED POLYCARBONATE COMPOSITIONS, METHODS OF MAKING, AND ARTICLES FORMED THEREFROM

A polycarbonate composition comprising: a high heat copolycarbonate comprising high heat carbonate units, wherein a homopolycarbonate of the high heat carbonate units has a glass transition temperature (Tg) of 155-250 °C; and optionally low heat carbonate units, wherein a homopolycarbonate of the lo...

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Bibliographische Detailangaben
Hauptverfasser:	GALLUCCI, Robert Russell, SYBERT, Paul Dean, GINDT, Brandon Philippe
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	A polycarbonate composition comprising: a high heat copolycarbonate comprising high heat carbonate units, wherein a homopolycarbonate of the high heat carbonate units has a glass transition temperature (Tg) of 155-250 °C; and optionally low heat carbonate units, wherein a homopolycarbonate of the low heat carbonate units has a Tg of up to 150 °C, each as determined by differential scanning calorimetry as per ASTM D3418 with heating rate of 20 °C/min; greater than 200-5000 ppm of an aryl benzofuranone stabilizer, based on the total parts by weight of the composition, wherein a 3.2 millimeter-thick molded sample aged for 250 hours at 150 °C has a change in a yellowness index value of less than 6.0, or less than 5.0, or less than 3.0 as compared with an initial yellowness index value of the molded sample, as measured in accordance with ASTM D1925.