Title:
PRESSURE-SENSITIVE ADHESIVE SHEET CHANGEABLE IN COLOR
Document Type and Number:
WIPO Patent Application WO/2022/230222
Kind Code:
A1
Abstract:
A pressure-sensitive adhesive sheet (S) as this pressure-sensitive adhesive sheet changeable in color includes a pressure-sensitive adhesive layer (10). The pressure-sensitive adhesive layer (10) comprises: a polymer component having a microphase separation structure including a first phase and a second phase; and a colorant which can be colored by an external stimulus. The colorant is compatible with the first phase but incompatible with the second phase. The polymer component includes a polymer having, in the molecule, a first segment, which forms the first phase, and a second segment, which forms the second phase. The first segment has a first glass transition temperature of 10-120°C, and the second segment has a second glass transition temperature, which is lower than the first glass transition temperature.
Inventors:
YAMAMOTO ATSUSHI (JP)
MIZUNO DAISUKE (JP)
NAKANO TAKESHI (JP)
MIZUNO DAISUKE (JP)
NAKANO TAKESHI (JP)
Application Number:
PCT/JP2021/041689
Publication Date:
November 03, 2022
Filing Date:
November 12, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J7/38; C09B11/28; C09B57/00; C09J11/06; C09J133/00; C09J151/00; C09J153/00; C09J201/00; C09K9/02; G02B5/23
Domestic Patent References:
| WO2019111611A1 | 2019-06-13 |
Foreign References:
| JPH09227845A | 1997-09-02 | |||
| US5342861A | 1994-08-30 | |||
| CN111303779A | 2020-06-19 | |||
| JPS59168080A | 1984-09-21 |
Attorney, Agent or Firm:
OKAMOTO, Hiroyuki et al. (JP)
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