Title:
REVERSIBLY THERMOCHROMIC MICROCAPSULE PIGMENT
Document Type and Number:
WIPO Patent Application WO/2023/100627
Kind Code:
A1
Abstract:
The present invention provides a reversibly thermochromic microcapsule pigment which easily changes, upon heating, from a decolored state to a colored state and sharply returns again to the decolored state, at a temperature in the range of living environmental temperatures or at a temperature around daily-living temperatures. This reversibly thermochromic microcapsule pigment is one obtained by microencapsulating a reversibly thermochromic composition comprising (A) an electron-donating color-assuming organic compound, (B) a 4-hydroxybenzoic acid ester compound represented by general formula (1) as an electron-accepting compound, (C) a compound, e.g., a chain hydrocarbon, as a reaction medium for reversibly causing electron transfer reactions between the (A) and the (B), (D) a linear dibasic acid compound having 3-22 carbon atoms, and (E) a compound, e.g., an aromatic hydrocarbon, having a melting point of 50°C or higher. (In formula (1), R represents a C12-C22, linear or branched alkyl group.)
Inventors:
FUJITA KATSUYUKI (JP)
Application Number:
PCT/JP2022/042197
Publication Date:
June 08, 2023
Filing Date:
November 14, 2022
Export Citation:
Assignee:
KK PILOT CORPORATION ALSO TRADING AS PILOT CORPORATION (JP)
PILOT INK CO LTD (JP)
PILOT INK CO LTD (JP)
International Classes:
C09K9/02; C09B57/00; C09B67/08
Domestic Patent References:
| WO2020196073A1 | 2020-10-01 |
Foreign References:
| JP2013159706A | 2013-08-19 | |||
| JP2013231138A | 2013-11-14 | |||
| JP2014084454A | 2014-05-12 | |||
| JP2001261863A | 2001-09-26 | |||
| JPS53102284A | 1978-09-06 | |||
| JP2002036729A | 2002-02-06 |
Attorney, Agent or Firm:
MIYAJIMA Manabu et al. (JP)
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