Pigment composition

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United States of America Patent

PATENT NO 11549018
APP PUB NO 20190264030A1
SERIAL NO

16204873

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Abstract

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A pigment composition contains: an azo pigment that is a reaction product between a coupler and a base; and a pigment derivative, and a content of o-anisidine derived from the coupler is less than or equal to 20 mg/kg in the entire pigment composition. A method for producing the pigment composition includes, after reaction between a coupler and a base to generate an azo pigment, or during the reaction between the coupler and the base, adding a remover for o-anisidine derived from the coupler.

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Patent Owner(s)

Patent OwnerAddress
SANYO COLOR WORKS LTD81 NOBUSUE HIMEJI-SHI HYOGO 6700966

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nishikawa, Takeshi Hyogo, JP 63 477
Sato, Junichiro Hyogo, JP 8 21

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