The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1994
Filed:
Sep. 09, 1992
Applicant:
Inventors:
Yuuji Hirasawa, Tokyo, JP;
Akimitsu Mochizuki, Tokyo, JP;
Assignee:
Toyo Ink Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; C09D / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
106 / ; 106 / ; 106 / ; 106 / ; 106493 ; 106494 ; 534563 ; 534564 ; 534565 ; 534863 ;
Abstract
A monoazo lake pigment and a process for its production; the monoazo lake pigment excellent in clearness, transparency, gloss and tinting strength is obtained by coupling a diazo component which is an aromatic amine having a sulfonic acid group with a coupler component which contains .beta.-naphthol or .beta.-oxynaphthoic acid and adding a laking agent during or after the coupling reaction, the coupler component further containing 0.1 to 30 mol %, based the coupler component, of a compound of the following formula, ##STR1## wherein n=1 or 2.