公开(公告)号：US20190062559A1

公开(公告)日：2019-02-28

申请号：US15767280

申请日：2016-10-04

Applicant: KAO CORPORATION

Inventor： Shuichi ABE ,  Tsuyoshi ODA ,  Toshiya IWASAKI ,  Masayuki NARITA

IPC: C09B29/33 ,  C09D11/322 ,  C09D11/037 ,  C09D11/107 ,  C09B67/20 ,  C09B67/46

Abstract: The present invention relates to [1] a process for producing a pigment composition, including the step of subjecting a raw material pigment composition containing PY74 and a specific by-product to a treatment with an oxidizing agent, in which a content of the specific by-product in the pigment composition after the treatment on the basis of a content of PY74 in the pigment composition after the treatment is not more than 1,200 mg/kg; [2] a process for producing a pigment composition, including the step of subjecting a raw material pigment composition containing PY74, a specific by-product and water to a treatment with hydrogen peroxide; [3] a method of reducing a content of a specific by-product in a raw material pigment composition containing PY74 and the specific by-product, said method including the step of subjecting the raw material pigment composition to a treatment with an oxidizing agent; and [4] a method of preventing an ink for ink-jet printing from suffering from ejection defects, including the step of compounding the pigment composition produced by any of the aforementioned processes in the ink for ink-jet printing.

公开(公告)号：US20180305553A1

公开(公告)日：2018-10-25

申请号：US15767929

申请日：2016-10-04

Applicant: KAO CORPORATION

Inventor： Shuichi ABE ,  Tsuyoshi ODA ,  Toshiya IWASAKI

IPC: C09B29/33 ,  C09D17/00

CPC classification number: C09B29/33 ,  C09B67/0009 ,  C09B67/0046 ,  C09B67/0066 ,  C09B67/009 ,  C09B67/0091 ,  C09D11/322 ,  C09D17/003

Abstract: The present invention relates to [1] a process for producing a pigment composition, including the step of subjecting a raw material pigment composition containing C.I. Pigment Yellow 74, a specific by-product and water to heat treatment at a temperature of from 160 to 210° C.; and [2] a method of reducing a content of a by-product in a raw material pigment composition containing C.I. Pigment Yellow 74, the specific by-product and water, said method including the step of subjecting the raw material pigment composition to heat treatment at a temperature of from 160 to 210° C.