The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2024
Filed:
Nov. 16, 2018
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Kohhei Aida, Tokyo, JP;
Shunsuke Mori, Tokyo, JP;
Kotaro Araya, Tokyo, JP;
Shigetaka Tsubouchi, Tokyo, JP;
Masahiro Kawasaki, Tokyo, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
It is possible to provide a temperature detection ink, which allows color initialization by a simple method and discolors with addition of time and temperature at a reaction temperature or higher. To solve the problem, the temperature detection ink according to the present invention includes a temperature detection material and a solvent. The temperature detection material has a structure in which a thermosensitive material containing a leuco dye, a color-developing agent, and a decolorant is contained in a microcapsule, or a structure in which a phase containing the thermosensitive material is phase-separated from a matrix material. The thermosensitive material is solidified while being decolored by cooling from a molten state to a glass transition temperature or lower at a predetermined rate or higher. The thermosensitive material has a glass transition temperature of −20 to 60° C., and a melting point that is 60 to 250° C. and lower than the boiling point of the solvent.