Anthrapyridone compound or salt thereof, magenta ink composition containing anthrapyridone compound, and colored body

Abstract

Disclosed is an anthrapyridone compound represented by formula (1) or a salt thereof. The compound or a salt thereof enables formation of a magenta dye having a hue with high definition suitable for inkjet recording and excellent storage stability. A matter recorded with such a magenta dye has high fastness. [In the formula, R1 represents a hydrogen atom, an alkyl group or the like; R2 represents a hydrogen atom or a methoxy group; R3 represents an unsubstituted or substituted C5-C12 alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group; and one of the substitution positions of -SO2R3 and -SO3H on a benzene ring, which positions are not specified, is para, and the other is ortho, respectively to the substitution position of a nitrogen atom on the benzene ring.

Description

technical field The present invention relates to a novel anthrapyridone compound, a magenta ink composition containing the anthrapyridone compound as a pigment, and a colored body colored by the ink composition. Background technique Among various color recording methods, as one of the representative methods, a recording method using an inkjet printer, various ink discharge methods have been developed. In each method, small ink droplets are generated and attached to various recording materials (paper, film, cloth, etc.) to perform recording. In this method, since the recording head is not in contact with the recording material, there is almost no sound and it is very quiet. In addition, because it is easy to miniaturize, speed up, and colorize, it has been rapidly popularized in recent years, and it will also be possible in the future. Looking forward to great development. Conventionally, water-based inks obtained by dissolving water-soluble dyes in aqueous media have been...

AI Technical Summary

Problems solved by technology

However, although xanthenes are excellent in color tone and vividness, they are very poor in light fastness

In addition, although azo dyes using H acid are good in color tone and water resistance, most of them are poor in light resistance, gas resistance and vividness.

In this category, although magenta dyes with excellent vividness and light fastness have been developed, their light fastness is still inferior compared with dyes of other hues such as cyan dyes and yellow dyes represented by copper phthalocyanine pigments. s level

As magenta pigments excellent in vividness and light resistance, there are anthrapyridone-based pigments (for example, refer to Patent Documents 1 to 11), but all the color tone, vividness, light resistance, water resistance, gas resistance, and dissolution stability have not yet been achieved. Satisfactory pigment

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