Patent ID: 8741998

Claim:
A composition comprising: a. from 35 to 80 vol % of a thermoplastic polymer comprising an aliphatic polyamide, polyester, polyethylene and ethylene based copolymer, polypropylene, polyphenylene sulfide, polyetheretherketone, polycarbonate, or polyetherimide, or a combination thereof; b. from 5 to 45 vol % of a thermally insulative filler with an intrinsic thermal conductivity less than or equal to 10 W/mK comprising H 2 Mg 3 (SiO 3 ) 4 , Mg(OH) 2 , BaO, γ-AlO(OH) (Boehmite), γ-AlO(OH) (Diaspore), Al(OH) 3 , BaSO 4 , ZrO 2 , SiO 2 , MgO.xAl 2 O 3 , CaMg(CO 3 ) 2 , or a combination thereof; and c. from 5 to 15 vol % of a thermally conductive filler with an intrinsic thermal conductivity greater than or equal to 50 W/mK comprising AlN, BN, MgSiN 2 , SiC, graphite, ceramic-coated graphite, expanded graphite, or graphene, or a combination thereof, wherein the composition is characterized by: i. a thermal conductivity of at least 1.0 W/mK; ii. a thermal conductivity of at least 7 times the total filler volume fraction times the thermal conductivity of the pure thermoplastic polymer; and iii. a volume resistivity of at least 10 7 Ohm·cm.