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Title:
REVERSIBLE THERMOCHROMIC COMPOSITION AND REVERSIBLE THERMOCHROMIC MICROCAPSULE PIGMENT ENCAPSULATING SAME
Document Type and Number:
WIPO Patent Application WO/2022/065229
Kind Code:
A1
Abstract:
[Problem] To provide: a reversible thermochromic composition that has excellent contrast between a colored state and a colorless state and also has excellent lightfastness; and a reversible thermochromic microcapsule pigment that encapsulates the reversible thermochromic composition. [Solution] A reversible thermochromic composition that includes (a) an organic electron-donating coloring compound, (b) a combination of compounds that have a specific structure and serve as electron-accepting compounds, and (c) a reaction medium that reversibly allows an electron transfer reaction to occur between component (a) and component (b) in a specific temperature range; and a reversible thermochromic microcapsule pigment that encapsulates the reversible thermochromic composition.

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Inventors:
UMEMOTO HIROSHI (JP)
MAEHASHI KAORI (JP)
MASUSHIGE NAOTO (JP)
MORIGAKI YUI (JP)
Application Number:
PCT/JP2021/034302
Publication Date:
March 31, 2022
Filing Date:
September 17, 2021
Export Citation:
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Assignee:
PILOT INK CO LTD (JP)
KK PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION (JP)
International Classes:
C09K9/02; B43K5/00; B43K7/00; B43K8/02; B43K29/02; C09B11/28; C09B67/08; C09B67/20; C09D7/41; C09D11/037; C09D11/17; C09D11/326; C09D201/00
Foreign References:
JP2010126549A2010-06-10
JP2006137886A2006-06-01
JP2018531990A2018-11-01
JP2000297277A2000-10-24
JPS5144706B21976-11-30
JPS5144707B21976-11-30
JPH0129398B21989-06-09
JPH0417154B21992-03-25
JPH07179777A1995-07-18
JPH0733997A1995-02-03
JPH0839936A1996-02-13
JP2005001369A2005-01-06
JPH0417154B21992-03-25
JP2020100710A2020-07-02
JPS5144706A1976-04-16
JP2003253149A2003-09-10
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
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