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公开(公告)号：WO2022195511A1
公开(公告)日：2022-09-22
申请号：PCT/IB2022/052395
申请日：2022-03-16
摘要： Aspects of the disclosure relate to a composition including: from about 35 wt% to about 70 wt% of at least one polyethylene polymer; from about 25 wt% to about 55 wt% of at least one graphite filler; and from about 2 wt% to about 15 wt% of a carbon powder filler having a BET surface area of at least 50 square meters per gram (m2/g). The polyethylene polymer has a density of at least 0.94 gram per cubic centimeter (g/cm3), a melt flow rate (MFR) of at least 10g per 10 minutes (g/10min) measured at 190 °C and 21.6 kilogram (kg), and an Environmental Stress-Cracking Resistance (ESCR) of at least 500 hours. The composition has a volume electrical resistivity of less than 5 ohm.centimeter (ohm.cm) and a MFR of at least 4 g/10 min measured at 280 °C and 21.6 kg.
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2.发明申请
公开(公告)号：WO2023073582A1
公开(公告)日：2023-05-04
申请号：PCT/IB2022/060297
申请日：2022-10-26
发明人： SILVI, Norberto
摘要： 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 carbon nanotubes have an average diameter of from about 8-12 nanometers (nm), a length of about 5 micron (µm) or less, a surface area of about 220 square meters per gram (m2/gr) or higher, and a volume resistivity lower than about 10-2 Ohm.centimeters (Ohm.cm). 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.
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3.发明申请
公开(公告)号：WO2023281440A1
公开(公告)日：2023-01-12
申请号：PCT/IB2022/056288
申请日：2022-07-07
发明人： SILVI, Norberto
摘要： Thermoplastic compositions include: a thermoplastic polymer component including a polyester; and from greater than 0.10 wt% to about 1.95 wt% of a carbon nanotube (CNT) fdler. A 6 in x 8 in x 1/8 in molded sample of the composition has a percent Absorbed Power measured in Transmission mode of at least 60% when observed at a 77 GHz frequency according to a Free Space method. In some aspects the polyester includes polybutylene terephthalate (PBT). Further aspects include articles (e.g., a radar sensor, a camera, an electronic control unit, etc.) including a molded part including a microwave absorbing material (absorber). The article may have at least two openings to allow the transmission of microwave radiation between a transmitting antenna and a receiving antenna located in/on the printed circuit board of the sensor.
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公开(公告)号：WO2022144777A1
公开(公告)日：2022-07-07
申请号：PCT/IB2021/062397
申请日：2021-12-28
发明人： SILVI, Norberto
摘要： A thermoplastic composition includes: (a) from about 82 wt% to about 92 wt% of a thermoplastic resin including poly(phenylene ether) and polystyrene; and (b) from about 3 wt% to about 13 wt% of a carbon-based filler. The carbon-based filler has a specific surface area of at least 650 square meters per gram (m2/g) and an Oil Absorption Number of at least 250 milliliter per 100 gram (ml/100g). The composition has a dielectric constant ε' of between 3.5 and 10 and a dissipation loss ε" of between 0.25 and 5, as measured at a frequency of between about 75 gigahertz (GHz) and about 110 GHz. A 1/8-inch-thick molded sample of the composition exhibits a Percent Absorbed Power measured in Transmission mode of at least 50% when observed according to a Free Space method at frequencies from about 75 GHz to about 110 GHz.
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公开(公告)号：WO2022018639A1
公开(公告)日：2022-01-27
申请号：PCT/IB2021/056559
申请日：2021-07-20
摘要： Disclosed is a composite comprising from about 50 wt. % to about 97 wt. % of a thermoplastic resin, wherein the thermoplastic resin comprises a polyester; and from about 3 wt. % to about 15 wt. % of a carbon-based filler, wherein the carbon-based filler has a primary surface area of from about 500 to about 1000 m2/g, wherein the composite exhibits a dielectric constant ε' of between 5 and 30 and a dissipation loss ε" of between 0.5 and 45, measured at frequencies between about 10 and about 120 GHz. A molded sample of the composite exhibits a percent reflected power measured in transmission mode of at least 15% when observed according to a Free Space method at frequencies from about 75 GHz to 110 GHz.
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公开(公告)号：WO2022144854A1
公开(公告)日：2022-07-07
申请号：PCT/IB2021/062524
申请日：2021-12-31
发明人： SILVI, Norberto
IPC分类号： C08K7/06 , G01S13/931 , H05K9/00 , C08L67/02
摘要： Disclosed is a composite comprising: from about 50 wt. % to about 99 wt. % of a thermoplastic resin, wherein the thermoplastic resin comprises a polyester; and from about 0.1 wt. % to 15 wt. % of a carbon fiber filler, wherein the carbon fiber has a bulk density of at least 500 g/l and a volume electrical resistivity of less than 2,000 μΩꞏcm, with individual filaments that have a length-to-diameter ratio of at least 300, wherein a 3.175 mm thick molded sample of the composite exhibits a Transmission of less than 15% of incident microwave radiation when observed according to a Free Space method, measured at frequencies of 75 to 110 GHz, wherein the combined weight percent value of all components does not exceed 100 wt. %, and all weight percent values are based on the total weight of the composite.
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