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:
Sep. 01, 1992
Filed:
Aug. 08, 1990
Toyo Ink Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A monoazo lake which comprises a monoazo dye, a lake-forming metal and a water-insoluble metal salt of a rosin, and which is coated with the water-insoluble water salt of the rosin, the lake-forming metal being at least one metal selected from calcium, barium and strontium, the metal of the water-insoluble metal salt being at least one metal selected from zinc, aluminum, copper and manganese, and a process for the production of a monoazo lake coated with a water-insoluble metal salt of a rosin, which comprises carrying out the following steps (1) and (2) in the order of (1) to (2) or (2) to (1): (1) a step of forming a monoazo lake by forming a lake of a monoazo dye with a metal salt of at least one metal for formation of a lake of the monoazo dye selected from calcium, barium and strontium, and (2) a step of forming the water-insoluble metal salt of the rosin by insolubilizing the rosin with a metal salt of at least one metal for insolubilization of the rosin selected from zinc, aluminum, copper and manganese.