INK COMPOSITION FOR INK JET PRINTING AND METHOD FOR INK JET PRINTING

• Main Authors: YAMANOUCHI JUNICHI, YAMADA MASATO
• Format: Patent
• Language: English
• Published: 19.03.2002
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LAKES; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide an ink composition for ink jet printing, excellent in handleability, odor, safety or the like, having high issue stability after the lapse of long period of time under severe conditions, giving images of good hue, light stability and water resistance, having no image defect such as fine line blotting and improved in image preservability under severe conditions. SOLUTION: This ink composition for ink jet printing is obtained by including a water-soluble azo dye of general formula I [X is an electron-withdrawing group having >=0.20 Hammett's substituent constant σp; R1 to R6, Y, Z1 and Z2 are each independently H, a halogen or a (substituted) organic group; A is a group of nonmetal atoms required for forming a five to eight-membered ring and the ring may be a saturated ring or may have unsaturated bond] and a water-miscible organic solvent, and the ink composition for ink jet printing also contains dispersed polymeric microparticles.