US 12,221,746 B2
Treatment agent for carbon fiber precursors, and carbon fiber precursor
Jun Ito, Gamagori (JP); Keiichiro Oshima, Gamagori (JP); and Yohei Suzuki, Gamagori (JP)
Assigned to TAKEMOTO YUSHI KABUSHIKI KAISHA, Aichi-ken (JP)
Appl. No. 18/563,646
Filed by TAKEMOTO YUSHI KABUSHIKI KAISHA, Aichi-ken (JP)
PCT Filed Jun. 2, 2022, PCT No. PCT/JP2022/022416
§ 371(c)(1), (2) Date Nov. 22, 2023,
PCT Pub. No. WO2022/255434, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2021-094515 (JP), filed on Jun. 4, 2021.
Prior Publication US 2024/0240389 A1, Jul. 18, 2024
Int. Cl. D06M 15/53 (2006.01); D06M 15/643 (2006.01); D06M 15/647 (2006.01); D06M 101/26 (2006.01)
CPC D06M 15/53 (2013.01) [D06M 15/6436 (2013.01); D06M 15/647 (2013.01); D06M 2101/26 (2013.01); D06M 2200/40 (2013.01)] 7 Claims
 
1. A carbon fiber precursor treatment agent comprising a (poly)oxyalkylene derivative (A) and a smoothing agent (B), wherein
the smoothing agent (B) contains at least one selected from the group consisting of an amino-modified silicone, a polyether-modified silicone, a dimethyl silicone, and an ester compound,
assuming that the sum of the content ratios of the (poly)oxyalkylene derivative (A) and the smoothing agent (B) in the carbon fiber precursor treatment agent is 100% by mass, the carbon fiber precursor treatment agent contains the (poly)oxyalkylene derivative (A) at a ratio of 5% by mass or more and 80% by mass or less and the smoothing agent (B) at a ratio of 20% by mass or more and 95% by mass or less, and
the (poly)oxyalkylene derivative is represented by the following chemical formula:

OG Complex Work Unit Chemistry
wherein R1 is an aliphatic hydrocarbon group having 3 or more methyl groups and 4 or more and 24 or less carbon atoms,
AO is an alkyleneoxy group having 2 or more and 4 or less carbon atoms, provided that when the number of alkyleneoxy groups is two or more, all of them may be of the same alkyleneoxy type or of different alkyleneoxy types, and
n is an integer of 1 or more and 30 or less.