Black azo pigment and colorant
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United States of America Patent
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Jul 9, 2019
Grant Date -
Feb 14, 2019
app pub date -
Apr 14, 2017
filing date -
Apr 22, 2016
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Abstract
There are provided: a near-infrared non-absorbing black azo pigment having a sufficient blackness, having an excellent durability such as solvent resistance, and having a novel skeleton; and a colorant that uses the black azo pigment and is useful for forming a black matrix or a light-shielding film. The black azo pigment is represented by the following formula (1), wherein R1 represents an aryl group optionally having a substituent. In addition, the colorant contains the black azo pigment and is suitable as a material or the like for forming a black matrix for a color filter or for forming a light-shielding film.
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