Title:
スタンプ用熱変色性インキ組成物及びそれを用いたスタンプ
Document Type and Number:
Japanese Patent JP7328817
Kind Code:
B2
Abstract:
To provide a thermochromic ink composition for a stamp high in stability of a microcapsule pigment in an aqueous medium, and capable of heightening a decoloring temperature within a range where decoloring is possible with frictional heat even when using a constituent having a high melting point, and a stamp using the same.SOLUTION: The thermochromic ink composition for a stamp is an aqueous ink composition using a reversible thermochromic pigment encapsulated with a reversible thermochromic composition composed of (A) an electron-donating coloration-natured organic compound, (B) an electron-accepting compound, and (C) a reaction medium for controlling a coloring reaction of (A) and (B) in a microcapsule as a coloring agent, where the constituent (C) has a melting point of a range 80°C-130°C, and a content of 60-90 mass% in a total amount of the reversible thermochromic composition. The stamp 1 is housed with the ink composition.SELECTED DRAWING: Figure 7
Inventors:
Akio Nakajima
Hiroshi Umemoto
Hiroshi Umemoto
Application Number:
JP2019137824A
Publication Date:
August 17, 2023
Filing Date:
July 26, 2019
Export Citation:
Assignee:
Pilot Corporation Co., Ltd.
International Classes:
C09D11/50; B41K1/50; C09D11/037
Domestic Patent References:
| JP2016010958A | ||||
| JP2019112549A | ||||
| JP2008280523A | ||||
| JP2018141059A | ||||
| JP2011156832A |