US 11,912,584 B2
Alumina products and uses thereof in polymer compositions with high thermal conductivity
Bashar Diar Bakerly, Cologne (DE); Henning Hofius, Aachen (DE); Martijn Jacobus Marinus Mies, PJ Eindhoven (NL); and Monika Giesselbach, Frechen (DE)
Assigned to MARTINSWERK GMBH, Bergheim (DE)
Filed by MARTINSWERK GMBH, Bergheim (DE)
Filed on Feb. 24, 2021, as Appl. No. 17/183,434.
Application 17/183,434 is a division of application No. 16/095,405, granted, now 10,968,111, previously published as PCT/EP2017/061601, filed on May 15, 2017.
Claims priority of provisional application 62/336,781, filed on May 16, 2016.
Prior Publication US 2021/0179439 A1, Jun. 17, 2021
Int. Cl. C01F 7/02 (2022.01); C08K 9/06 (2006.01); C08L 23/08 (2006.01); C01F 7/023 (2022.01); C01F 7/021 (2022.01); C08K 3/22 (2006.01); C08L 23/06 (2006.01)
CPC C01F 7/023 (2013.01) [C01F 7/02 (2013.01); C01F 7/021 (2013.01); C08K 9/06 (2013.01); C08L 23/0846 (2013.01); C08L 23/0853 (2013.01); C01P 2004/51 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/90 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/80 (2013.01); C08K 2003/2227 (2013.01); C08K 2201/001 (2013.01); C08K 2201/005 (2013.01); C08K 2201/016 (2013.01); C08L 23/06 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A polymer composition comprising:
(a) a polymer; and
(b) an alumina product having a fine alumina particle size component and a coarse alumina particle size component, wherein:
the fine alumina particle size component has a d50 particle size in a range from 0.3 to 6 μm;
the coarse alumina particle size component has a d50 particle size in a range from 7 to 35 μm, and is characterized by an average aspect ratio in a range from 2.5 to 15; and
the amount of the fine alumina particle size component in the alumina product is from 10 to 90 wt. %, based on the total weight of the fine alumina particle size component and the coarse alumina particle size component.