US 11,873,314 B2
Composition and preparation for hafnium carbide ceramic precursor
Howard Q. Shen, Albany, NY (US)
Assigned to STARFIRE SYSTEMS, INC., Glenville, NY (US)
Filed by Starfire Systems, Inc., Glenville, NY (US)
Filed on Oct. 29, 2021, as Appl. No. 17/514,163.
Claims priority of provisional application 63/107,615, filed on Oct. 30, 2020.
Prior Publication US 2022/0135600 A1, May 5, 2022
Int. Cl. C07F 7/00 (2006.01); C04B 35/56 (2006.01); C08G 79/00 (2006.01)
CPC C07F 7/00 (2013.01) [C04B 35/5622 (2013.01); C08G 79/00 (2013.01)] 12 Claims
 
1. A ceramic precursor polymer composition comprising at least one poly(carbometallocene) selected from the group consisting of:

OG Complex Work Unit Chemistry
wherein C5H5 is a cyclopentadienyl ligand, n, x and y are integers representing degrees of polymerization of the at least one poly(carbometallocene), and M is a metal selected from the group consisting of Hf, Zr, Ti, V, Nb, Ta, and combinations thereof.