Title:
COLOR VARIABLE ADHESIVE SHEET
Document Type and Number:
Japanese Patent JP2022126585
Kind Code:
A
Abstract:
To provide a color variable adhesive sheet which, after being stuck to an adherend, is suitable for efficiently changing a color of at least a portion of an adhesive layer.SOLUTION: An adhesive sheet X (color variable adhesive sheet) of the present invention comprises an adhesive layer 10. The adhesive layer 10 comprises a base polymer, a color developing compound which develops color by a reaction with an acid, a photo acid generator, and a photosensitizer. The photo acid generator has an absorption in a first wavelength range of 330 nm or less and, in the first wavelength range, an acetonitrile solution having a sample concentration of 1.0×10-5 mass% has a first absorption wavelength as the longest wavelength among absorption wavelengths having an absorbance of 0.1 or more as measured under a condition of an optical path of 10 mm. The photosensitizer has an absorption in a second wavelength range which is on a longer wavelength side than the first absorption wavelength and, in the second wavelength range, has a second absorption wavelength as the shortest wavelength among absorption wavelengths having an absorbance of 0.1 or more as measured under the above condition. A difference between the first absorption wavelength and the second absorption wavelength is 30 nm or more.SELECTED DRAWING: Figure 1
Inventors:
MIZUNO DAISUKE
NAKANO TAKESHI
OZAKI MAYU
NAKANO TAKESHI
OZAKI MAYU
Application Number:
JP2021197644A
Publication Date:
August 30, 2022
Filing Date:
December 06, 2021
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
C09J7/38; C09J11/06; G02B5/22; H01L51/50
Attorney, Agent or Firm:
Hiroyuki Okamoto
Shinichi Uda
Shinichi Uda