Title:
VARIABLE-COLOR ADHESIVE SHEET AND COLORING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/042676
Kind Code:
A1
Abstract:
An adhesive sheet (X) serving as a variable-color adhesive sheet of the present invention includes: a base polymer; a chromogenic compound which can reversibly change between a colored state created through a reaction with acid and a non-colored state; a thermal acid generator; and a photoacid generator or a photobase generator. The method for coloring the adhesive sheet (X) includes a step for joining members (21, 22) by using the adhesive sheet (X), a step for heating and coloring the adhesive sheet (X), and a step for changing the color of a portion of the adhesive sheet (X) by using light irradiation. The adhesive sheet (X) serving as the variable color adhesive sheet of the present invention may alternately include a base polymer, a chromogenic compound, a thermal acid generator residue, and a photoacid generator or a photobase generator. The method for coloring this adhesive sheet (X) includes a step for joining members (21, 22) by using the adhesive sheet (X), and a step for changing the color of a portion of the adhesive sheet (X) by using light irradiation.
Inventors:
MIZUNO DAISUKE (JP)
NAKANO TAKESHI (JP)
NAKANO TAKESHI (JP)
Application Number:
PCT/JP2022/032983
Publication Date:
March 23, 2023
Filing Date:
September 01, 2022
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J7/38; C09J11/06; C09J201/00
Domestic Patent References:
| WO2020262048A1 | 2020-12-30 | |||
| WO2020188984A1 | 2020-09-24 | |||
| WO2020189390A1 | 2020-09-24 |
Attorney, Agent or Firm:
OKAMOTO, Hiroyuki et al. (JP)
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