Near infrared absorbing compound
AssigneeNisshinbo Industries, Inc.
InventorsShun Hasegawa, Gen Masuda
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Abstract
By forming a copper salt of phytic acid at a molar ratio of copper ion (Cu2+) to phytic acid of 2:1 or higher, there is provided a compound absorbing near infrared rays, which does not substantially absorb lights of visible light wavelength range, but strongly absorb lights of near infrared wavelength range, and shows extremely good water solubility.
Claims3
A near infrared absorber comprising a copper salt of phytic acid as a near infrared absorbing compound and resin so as to provide the near infrared absorber in the form of film for absorbing near infrared wavelength range, wherein the copper salt of phytic acid consists of Cu2+ and phytic acid at a molar ratio of Cu2+ to phytic acid being 2:1 or higher.
Dependencies are inferred from the claim text.