Title:
REVERSIBLE THERMOCHROMIC COMPOSITION AND REVERSIBLE THERMOCHROMIC MICROCAPSULE PIGMENT ENCAPSULATING SAME
Document Type and Number:
WIPO Patent Application WO/2022/065230
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 when in the colored state; 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 causes 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:
FUJITA KATSUYUKI (JP)
UMEMOTO HIROSHI (JP)
UMEMOTO HIROSHI (JP)
Application Number:
PCT/JP2021/034303
Publication Date:
March 31, 2022
Filing Date:
September 17, 2021
Export Citation:
Assignee:
PILOT INK CO LTD (JP)
KK PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION (JP)
KK PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION (JP)
International Classes:
C09K9/02; B41M5/00; B41M5/28; B43K29/02; C09B67/08; C09D11/037; C09D11/17; C09D11/322; C09D201/00
Foreign References:
| JP2010126549A | 2010-06-10 | |||
| JP2010127634A | 2010-06-10 | |||
| JPH08127768A | 1996-05-21 | |||
| JP2007510781A | 2007-04-26 | |||
| JPH11334208A | 1999-12-07 | |||
| JP2019112549A | 2019-07-11 |
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
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