US 12,012,543 B2
Composite material
Sai Bom Park, Daejeon (KR); and Jin Kyu Lee, Daejeon (KR)
Assigned to LG Chem, LTD., Seoul (KR)
Appl. No. 16/651,109
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 26, 2018, PCT No. PCT/KR2018/012781
§ 371(c)(1), (2) Date Apr. 10, 2020,
PCT Pub. No. WO2019/083311, PCT Pub. Date May 2, 2019.
Claims priority of application No. 10-2017-0141254 (KR), filed on Oct. 27, 2017.
Prior Publication US 2020/0263070 A1, Aug. 20, 2020
Int. Cl. C09K 5/14 (2006.01); C08J 5/18 (2006.01); C08K 3/22 (2006.01); C08K 3/38 (2006.01); C08K 7/04 (2006.01); F28F 21/06 (2006.01)
CPC C09K 5/14 (2013.01) [C08J 5/18 (2013.01); C08K 3/22 (2013.01); C08K 3/38 (2013.01); C08K 7/04 (2013.01); F28F 21/067 (2013.01); C08J 2383/04 (2013.01); C08K 2003/2272 (2013.01); C08K 2003/385 (2013.01); C08K 2201/001 (2013.01); C08K 2201/005 (2013.01); C08K 2201/01 (2013.01); C08K 2201/011 (2013.01); F28F 2255/06 (2013.01)] 13 Claims
 
1. A composite material comprising a polymer matrix and a thermal conductor,
wherein the thermal conductor comprises a first anisotropic heat-conductive filler combined with a magnetic body and a second anisotropic heat-conductive filler not combined with the magnetic body,
wherein a volume of the thermal conductor in the composite material is 55 vol % or less of the composite material,
wherein a ratio of a volume of the first anisotropic heat-conductive filler to a volume of the second anisotropic heat-conductive filler is 1 or less,
wherein the first and second anisotropic heat-conductive fillers each independently have an aspect ratio of 35 or mnres,
wherein the first and second anisotropic heat-conductive fillers each independently have an average particle diameter of the cross section in a range of from about 6 μm to 100 μm,
wherein the first and second anisotropic heat-conductive fillers each independently are alumina, aluminum nitride (AIN), boron nitride (BN), silicon nitride or beryllium oxide (BeO) (BeO),
wherein the magnetic body is iron oxide, ferrite or alloy nanoparticles, and
wherein the first anisotropic heat conductive filler is oriented to form heat transfer paths and the second anisotropic heat-conductive filler connects the heat transfer paths.