Organic solvent-based printing ink

Patent Name Organic Solvent Based Printing Ink Patent Applicant Xiba Special Chemicals Holdings Co., Ltd. Principal Applicant Address Basel Inventor I. F. Fraser; S. C. Niven; J. Wilcox Application (Patent) No. 03817843.5 Date of Application 2003.07.17 Approval Date Approval Notice No. 1671809 Audit Notice Date 2005.09.21 Instruction CD-ROM D0538 Main Classification No. C09D11/02 Classification No. C09D11/02 Sub-division Original Application No. Priority Item 2002.7.26 EP 02405651.7 Abstract The present invention discloses a printing ink composition comprising a quinone cationic dye, an organic solvent, an organic acid-soluble resin acid, and optionally organic pigments. Cationic dyes are formed from their methanol precursors (in situ). The composition has, for example, high color strength and excellent rheological properties and can be used for publication or packaging gravure flexible graphics, lithographic or letterpress printing processes. Slavs 1. An organic solvent-based printing ink composition comprising (1) a cationic dye of formula (1), or mixtures thereof, wherein R1-R6 are independently of each other hydrogen, substituted or unsubstituted alkyl, alkyl Oxygen, cycloalkyl, aryl, heteroaryl or allyl, R2 and R3 may be joined together to form a ring, and R5 and R6 are independently of each other halogen, cyano, nitro, aryloxy, chain Alkenyl, alkenyloxy, alkoxycarbonyl, aryloxycarbonyl, acyloxy, acyl, alkylthio, arylthio, acylamino, alkylsulfonyl, arylsulfonyl or thiocyanato, any Two R5 or any two R6 may combine together to form a homocyclic or heterocyclic aromatic or non-aromatic ring, m is an integer from 1 to 5, n is an integer from 1 to 4, and X- is an organic anion, (2) organic solvents, (3) organic resin acids soluble in organic solvents, or salts thereof, and (4) dispensable pigments. International Application PCT/EP2003/007772 2003.7.17 International Publication WO2004/013237 English 2004.2.12 Date of entry into the country Patent agency China Patent Agency (Hong Kong) Co., Ltd. Agency address Agent Wei Xinhua; Zhao Sulin