Invention Grant
- Patent Title: Pigment composition
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Application No.: US16204873Application Date: 2018-11-29
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Publication No.: US11549018B2Publication Date: 2023-01-10
- Inventor: Junichiro Sato , Takeshi Nishikawa
- Applicant: Sanyo Color Works, Ltd.
- Applicant Address: JP Hyogo
- Assignee: Sanyo Color Works, Ltd.
- Current Assignee: Sanyo Color Works, Ltd.
- Current Assignee Address: JP Hyogo
- Agency: Fitch, Even, Tabin & Flannery LLP
- Priority: JPJP2017-231733 20171201
- Main IPC: C09D11/00
- IPC: C09D11/00 ; C09B29/033 ; C09B29/34 ; C09D11/328 ; G03G9/09 ; C09B29/33 ; C09B41/00 ; C09B67/22 ; C09D11/322 ; C08K5/3492 ; C09D1/00 ; C09D4/00 ; C09D5/00 ; C09K3/00

Abstract:
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.
Public/Granted literature
- US20190264030A1 PIGMENT COMPOSITION Public/Granted day:2019-08-29
Information query
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