HOLLOW PARTICLE FOR WHITE INK FOR INKJET, METHOD FOR PRODUCING THE SAME AND WHITE INK FOR INKJET

PROBLEM TO BE SOLVED: To provide hollow particles for white ink for inkjet having excellent characteristics from viewpoints of L*value, adhesiveness, viscosity and sedimentation property, to provide a method for producing the particles and to provide a white ink for inkjet excellent in ink character...

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Hauptverfasser: SAKIYAMA HIROSHI, BESSHO KEIICHI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide hollow particles for white ink for inkjet having excellent characteristics from viewpoints of L*value, adhesiveness, viscosity and sedimentation property, to provide a method for producing the particles and to provide a white ink for inkjet excellent in ink characteristics. SOLUTION: The hollow particles for white ink for inkjet comprises hollow coated particles having 0.1-5.0 μm number-average particle diameter and 13-61% hollow ratio and obtained by forming coat of a copolymer composed of a monomer mixture (B) consisting of 0.5-80 mass% unsaturated carboxylic acid monomer and 20-99.5 mass% other monomers which are copolymerizable therewith onto the surface of hollow substrate particles (A) composed of a highly crosslinked polymer in which a number-average particle diameter is within a range of 0.05-3.0 μm. The hollow coated particles form coat of the copolymer by polymerizing the monomer mixture (B) in the presence of the hollow substrate particles (A) and an emulsifying agent. COPYRIGHT: (C)2009,JPO&INPIT