POLYCARBONATE COMPOSITIONS INCLUDING CARBON NANOTUBES (CNTS) AS MICROWAVE ABSORBERS IN AUTOMOTIVE RADAR SENSOR APPLICATIONS

Thermoplastic compositions include: (a) a polycarbonate resin; (b) a poly(carbonate-siloxane) copolymer having a siloxane content of at least about 5 wt%; and (c) from about 0.15 wt% to about 4.5 wt% of a carbon nanotube filler. The composition has a volume electrical resistivity of at least about 1...

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Bibliographische Detailangaben
1. Verfasser:	SILVI, Norberto
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Zusammenfassung:	Thermoplastic compositions include: (a) a polycarbonate resin; (b) a poly(carbonate-siloxane) copolymer having a siloxane content of at least about 5 wt%; and (c) from about 0.15 wt% to about 4.5 wt% of a carbon nanotube filler. The composition has a volume electrical resistivity of at least about 1.0E+06 Ohm.cm as determined in accordance with ASTM D257. A molded sample of the composition has a percent absorbed power measured in Transmission mode of at least about 60% when observed according to a Free Space method at frequencies from about 75 GHz to 110 GHz.