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US 9,732,226 B2Granted
Azo compound, ink containing azo compound, and display and electronic paper containing the ink
AssigneeMitsubishi Chemical Corporation
InventorsYasushi Shiga, Mitsuya Aoba, Yuki Tanaka, Mio Ishida
Life of this patent
Estimating the term…
Abstract
An azo compound excellent in solubility in solvent and having a high absorbance coefficient is disclosed, as well as an ink containing the azo compound. Such an ink contains a solvent having a relative permittivity at 22° C. and at a measurement frequency of 1 kHz of 3 or less and having a solubility in water at 25° C. of 20 mg/L or less, and an azo compound.
Claims15
An ink, comprising:
- a solvent having a relative permittivity at 22° C. and at a measurement frequency of 1 kHz of 3 or less and having a solubility in water at 25° C. of 20 mg/L or less;
- and
- an azo compound represented by formula (1):
- wherein:
- R1 and R2 each independently represent a hydrocarbon group optionally having a substituent, wherein at least one of R1 and R2 is a branched alkyl group having from 6 to 20 carbon atoms;
- and
- X1, X11 and A1 each independently represent a hydrogen atom or a substituent.
4 more elements
An azo compound represented by formula (8):
- wherein:
- R3 and R4 each independently represent an alkyl group having a carbon number of from 1 to 20 and optionally having a substituent, wherein at least one of R3 and R4 is a branched alkyl group having from 6 to 20 carbon atoms;
- R5 represents an alkyl group having a branched chain and having a carbon number of from 4 to 20 and optionally having a substituent;
- X2 and X12 each independently represent a hydrogen atom or a substituent.
1 more element
Dependencies are inferred from the claim text.