BRANCHED URETHANE RESIN DISPERSING AGENT, METHOD FOR PRODUCING THE SAME AND PIGMENT COMPOSITION PRODUCED BY USING THE AGENT

• Main Authors: NAKAZATO MUTSUMI, HIROSHIMA TSUTOMU
• Format: Patent
• Language: English
• Published: 18.10.2007
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; 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 MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a branched urethane resin dispersing agent having dispersing property and stability with excellent agglomeration resistance and fluidity, and suitable for offset ink, gravure printing ink, resist ink for color filter, inkjet ink, paint, colored resin composition, etc. SOLUTION: The branched urethane resin dispersing agent is produced by polymerizing a terminal isocyanate compound obtained by reacting a polyisocyanate having ≥3 isocyanate groups with a monoalcohol at an NCO/OH molar ratio of 3/(2-0.5), and a polyol compound containing a compound having one or more acidic groups and two or more hydroxy groups and an acrylic resin and/or siloxane resin having two or more hydroxy groups interposing 1-30 atoms between the groups under a hydroxy group excess condition. The ratio of nonvolatile component derived from polyisocyanate in the total nonvolatile components of the branched urethane resin dispersing agent is 25-60 wt.%. COPYRIGHT: (C)2008,JPO&INPIT