Carbon black
AssigneeMitsubishi Chemical Corporation
InventorsKohei Okuyama, Mitsuo Suzuki
Life of this patent
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Abstract
A carbon black having a ratio of a maximum absorbance in a range of 1800 to 1670 cm.sup.-1 to a maximum absorbance in a range of 1670 to 1500 cm.sup.-1 of not less than 0.65 on condition that a straight line interconnecting the absorbances at 1805 cm.sup.-1 and 900 cm.sup.-1 is taken as a base line in an absorbance chart of infrared absorption spectrum.
Claims9
A carbon black treated by oxidation i with ozone having the ratio of a maximum absorbance in a range of 1800 to 1670) cm.sup.-1 to the maximum absorbance in a range of 1670 to 1500 cm.sup.-1 of not less than 0.65 when a straight line interconnecting absorbances at 1805 cm.sup.-1 and 900 cm.sup.-1 is taken as a base line in an absorbance chart of the infrared absorption spectrum.
A furnace black treated by oxidation with ozone having the ratio of the maximum absorbance in a range of 1800 to 1670 cm.sup.-1 to the maximum absorbance in a range of 1670 to 1500 cm.sup.-1 of not less than 0.5 when a straight line interconnecting absorbances at 1805 cm.sup.-1 and 900 cm.sup.-1 is taken as a base line in an absorbance chart of the infrared absorption spectrum.
A carbon black treated by oxidation with ozone having in the infrared absorbance spectrum a ratio of maximum absorbance in a range of 1800 to 1670 cm.sup.-1 to the maximum absorbances in a range ol 1670 to 1500 cm.sup.-1 of at least 0.65, wherein said absorbances are measured from a base line interconnecting the points at 1805 cm.sup.-1 and at 900 cm.sup.-1 at which two points there is no absorbance.
Dependencies are inferred from the claim text.