Humectant set which improves maintenance of pigment or dyepigment blend inks

• Main Authors: MONEY ELAINE YEAP, SUTHAR AJAY KANUBHAI
• Format: Patent
• Language: English
• Published: 05.06.2003
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention provides a novel humectant set for use in an ink having properties suited for use in all types of printers to meet the demanding requirements, said novel humectant set comprising (a) polyethylene glycol; and (b) a diol with adjacent -OH groups; in further embodiment, comprising at least two of the following: (a) polyethylene glycol; (b) a diol with adjacent -OH group; and (c) 2-pyrrolidone; and in further embodiment, comprising (a) polyethylene glycol; (b) an alkyl diol with adjacent -OH groups; and (c) 2-pyrrolidone. Ink compositions of the present invention comprise: the humectant set of the present invention, colorant and, optionally, a penetrant and/or a binder.