US 11,981,790 B2
Carbon black and method for producing carbon black
Akihiro Sakakibara, Tokyo (JP); Yuki Kubota, Tokyo (JP); and Keisuke Osamura, Tokyo (JP)
Assigned to Tokai Carbon Co. Ltd., Tokyo (JP)
Appl. No. 17/907,765
Filed by TOKAI CARBON CO., LTD., Tokyo (JP)
PCT Filed Aug. 13, 2021, PCT No. PCT/JP2021/029822
§ 371(c)(1), (2) Date Aug. 29, 2022,
PCT Pub. No. WO2022/208924, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-063300 (JP), filed on Apr. 2, 2021.
Prior Publication US 2023/0323073 A1, Oct. 12, 2023
Int. Cl. C08K 3/04 (2006.01); C09C 1/50 (2006.01); C09C 1/58 (2006.01)
CPC C08K 3/04 (2013.01) [C09C 1/50 (2013.01); C09C 1/58 (2013.01); C01P 2002/82 (2013.01); C01P 2002/86 (2013.01); C01P 2006/12 (2013.01); C01P 2006/19 (2013.01); C08K 2201/006 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A carbon black wherein
a nitrogen adsorption specific surface area (N2SA) of the carbon black is 25 to 60 m2/g,
a DBP absorption number of the carbon black is 90 to 180 cm3/100 g,
a ratio of the nitrogen adsorption specific surface area (N2SA) to an iodine adsorption number (IA) (N2SA/IA) of the carbon black is 1.10×103 to 1.50×103 m2/g,
when a nuclear magnetic resonance signal of a spin-spin relaxation process observed by a solid echo method is represented by a sum of a first signal and a second signal having a larger time constant than that of the first signal, a hydrogen content of the carbon black represented by a signal intensity per unit mass at time 0 of the first signal is 150 to 250/g, and
when an excitation wavelength of the carbon black is set at 532 nm, a full width at half maximum ΔD of a Raman scattering peak appearing within a range of 1340 to 1360 cm−1 is 260 to 290 cm−1.