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US 11,981,790 B2Granted
Carbon black and method for producing carbon black
AssigneeTokai Carbon Co., Ltd.
InventorsAkihiro Sakakibara, Yuki Kubota, Keisuke Osamura
Life of this patent
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Abstract
A carbon black wherein a nitrogen adsorption specific surface area (N2SA) is 25 to 60 m2/g, a DBP absorption number 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) is 1.10×103 to 1.50×103 m2/g, a hydrogen content by NMR is 150 to 250 /g, and ΔD is 260 to 290 cm−1.
Claims5
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.
2 more elements
Dependencies are inferred from the claim text.