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AssigneeNippon Kayaku Kabushiki Kaisha
InventorsTakahiko Matsui, Hiroaki Ohno, Takashi Yoneda, Yasuo Shirasaki
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A novel azo compound represented by the following Formula (1) wherein A represents the following Formula (2) and is located preferably in a position meta or para to the azo group; R1 and R2 each independently represents hydrogen, carboxy, sulfo, nitro, C1-4 alkoxy, etc.; R3 and R4 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, hydroxy, or C1-4 alkoxy; and n is 0 or 1. [In the Formula (2), R5 represents cyano, carboxy, C1-4 alky, C1-4 alkoxycarbonyl, or phenyl; and R6, R7, and R8 each independently represents hydrogen, halogeno, cyano, carboxy, sulfo, nitro, C1-4 alkyl, C1-4 alkoxy, or acylamino.] The compound is useful as a black dye, especially one for ink compositions for, e.g., inkjet prints. Also provided are: an ink composition which contains the compound and has excellent storage stability; and a print obtained through recording with the ink. The print is excellent in light resistance, ozone resistance, fastness to moisture, etc.
An azo compound represented by Formula (1) as shown below or a salt thereof:
The azo compound or the salt thereof according to, wherein in Formula (1) R2 is a hydrogen atom and R1 is a carboxyl group or a sulfo group.
An azo compound or a salt thereof according to, wherein the azo compound is represented by Formula (5) as shown below:
The salt of the azo compound according to, wherein the salt is a lithium salt, a sodium salt, a potassium salt, an ammonium salt, or an ammonium salt represented by the general Formula (6):
The azo compound or the salt thereof according to, wherein in Formula (1), A's substitution position is the meta-position or the para-position to an azo group:
Dependencies are inferred from the claim text.