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:
Apr. 25, 2006
Filed:
Jul. 25, 2001
Kitayama Hirokazu, Saitama, JP;
Shinichi Namba, Tokyo, JP;
Takafumi Fujii, Saitama, JP;
Junji Otani, Saitama, JP;
Junko Yoshioka, Tokyo, JP;
Yasuo Shirasaki, Saitama, JP;
Kitayama Hirokazu, Saitama, JP;
Shinichi Namba, Tokyo, JP;
Takafumi Fujii, Saitama, JP;
Junji Otani, Saitama, JP;
Junko Yoshioka, Tokyo, JP;
Yasuo Shirasaki, Saitama, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a cyan dye mixture, an ink composition containing the mixture and a method of ink-jet recording with the ink composition. The print obtained by the method is characterized by discoloring or fading little even when allowed to stand in a well ventilated shade or in an ozone gas. The cyan dye mixture comprises compounds which are obtained by chlorosulfonating, as a starting material, copper phthalocyanine or a sulfonated copper phthalocyanine and then aminating the chlorosulfonation product with an aminating agent used in an amount of at least 2.5 mol per mol of the starting material, and which are represented by the following formula (1):wherein M represents a proton, alkali metal ion, alkaline earth metal ion, onium ion of an organic amine, or ammonium ion; m is an integer of 1 to 4; and n is an integer of 0 to 3; provided that m+n is an integer of 1 to 4.