Title:
REVERSIBLE THERMOCHROMIC MICROCAPSULE PIGMENT FOR INK AND REVERSIBLE THERMOCHROMIC AQUEOUS INK COMPOSITION USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/085358
Kind Code:
A1
Abstract:
[Problem] To provide a reversible thermochromic microcapsule pigment for ink that is rich in color forming properties and is capable of forming a high-definition reversible thermochromic image, a reversible thermochromic aqueous ink composition using the same, and an ink container accommodating the aqueous ink composition. [Solution] A reversible thermochromic microcapsule pigment for ink in which a reversible thermochromic composition including (a) an electron-donating color-forming organic compound, (b) an electron-accepting compound, and (c) a reaction medium for determining a temperature at which a color reaction of the components (a) and (b) occurs is enclosed in microcapsules, and the microcapsules are characterized by having a zeta potential of a positive or negative value in a microcapsule dispersion composed of only water and the microcapsules.
Inventors:
MITA MASAYUKI (JP)
WAKAGI ITARU (JP)
WAKAGI ITARU (JP)
Application Number:
PCT/JP2019/041460
Publication Date:
April 30, 2020
Filing Date:
October 23, 2019
Export Citation:
Assignee:
KK PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION (JP)
PILOT INK CO LTD (JP)
PILOT INK CO LTD (JP)
International Classes:
C09B67/08; B41J2/01; B41J2/175; B41M5/00; C09D11/037; C09D11/322
Domestic Patent References:
| WO2015129616A1 | 2015-09-03 |
Foreign References:
| JP2013132835A | 2013-07-08 | |||
| JP2014094554A | 2014-05-22 | |||
| JP2002363456A | 2002-12-18 | |||
| JP2012177098A | 2012-09-13 |
Attorney, Agent or Firm:
NAGAI Hiroshi et al. (JP)
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