DYE PRECURSOR-CONTAINING RESIN COMPOSITE FINE PARTICLES AND THERMAL RECORDING MATERIAL CONTAINING THE SAME

Japanese Patent JP3085187

B2

PROBLEM TO BE SOLVED: To provide dye precursor-containing resin composite particles not substantially containing a solvent and hardly destructed by pressure from the outside and high in the isolation properties from the outside at a time of non- heating and a thermal recording material excellent in pressure resistance, friction resistance, raw preservability and image stability after printing and reduced in blank paper fog.
SOLUTION: A soln. prepared by dissolving a dye precursor-containing solute in a solvent comprising a polyvalent isocyanate-containing polymerizable component is emulsified with and dispersed in a hydrophilic protective colloid aq. soln. and the obtained emulsion is subjected to the polymerization of the polymerizable component to prepare composite fine particles and, further, a thermal color forming layer containing the dye precursor-containing resin composite fine particles and a coupling compd. reacting with the dye precursor under heating to develop a color is formed on a support to produce a thermal recording material. The above mentioned solute contains the dye precursor and at least one kind of an org. compd. an m.p. of 40-150°C and a b.p. of 200°C or higher.

Yasuyuki Aoki
Tomoji Takahashi
Haruo Omura
Satoshi Fukui

JP9587396A

September 04, 2000

March 27, 1996

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Oji Paper Co.,Ltd.

B41M5/28; B01J13/16; B41M5/26; B41M5/30; B41M5/327; B41M5/337; C09B67/08; (IPC1-7): B41M5/28; B01J13/16; B41M5/30; C09B67/08

JP9142025A
JP9262457A
JP4101885A

Takashi Ishida (3 others)

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