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AssigneeKorea Research Institude of Chemical Technology
InventorsEun Kyoung Kim, Young Soon Kim, Soo Kyung Kim
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The present invention relates to a nanocapsule composition and its toner composition for thermosensitive rewritable recording media, more particularly to a core/shell-type nanocapsule composition for thermosensitive rewritable recording media, which has fine capsule of a few nanometers in size and superior recording property and heat stability, a preparation method thereof and its toner composition for thermosensitive rewritable recording media. The toner composition according to the present invention is suitable for high-resolution electrostatic image toner, paper and film. Also, it enables reuse of recording media because the recording is erased when the media (e.g.: paper and OHP film) is heated to a high temperature.
A capsule composition comprising 0.1-30 parts by weight of coloring compounds, 0.1-60 parts by weight of developer(s), 15-80 parts by weight of radical-polymerizable monomer(s), 0.1-10 parts by weight of radical polymerization initiator(s) and 20-80 parts by weight of solvent(s), wherein said radical-polymerizable monomer(s) surrounds said coloring compounds and developer(s) in a core/shell structure.
A method for preparing a capsule compositon comprising steps of:
A toner composition comprising 3-97 parts by weight of dry capsule particles obtained by drying a capsule composition according to any one of claims 1-7 and 0.01-50 parts by weight of a charge controlling agent, which is prepared by melting at 80-150° C.
Dependencies are inferred from the claim text.