Title:
OPTICAL ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2023/074558
Kind Code:
A1
Abstract:
This adhesive sheet (10) contains a base polymer as a photopolymer and is photocurable. This adhesive sheet (10) has a gel fraction of at least 75% by mass after curing by a photocuring process under the condition of an irradiation integrated light quantity of 3000 mJ/cm2. The adhesive sheet (10) has an adhesive strength of 2.5 N/10 mm or higher in a peeling test for peeling the adhesive sheet (10) from an alkaline glass plate under the condition of 85°C, a peeling angle of 180°, and a tensile speed of 300 mm/minute, the peeling test being performed after: performing a photocuring process having a condition in which the irradiation integrated light quantity is 3000 mJ/cm2 with respect to the adhesive sheet (10); bonding the adhesive sheet (10) to the alkaline glass sheet, which is fabricated by a float method; and heating and pressurizing the adhesive sheet (10) which is on the alkaline glass sheet, under the condition of 50°C, 0.5 MPa and for 15 minutes.
Inventors:
MIZOBATA SHUN (JP)
SHIMOKURI TAIKI (JP)
OHARA HIROTAKA (JP)
SHIMOKURI TAIKI (JP)
OHARA HIROTAKA (JP)
Application Number:
PCT/JP2022/039269
Publication Date:
May 04, 2023
Filing Date:
October 21, 2022
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J4/00; C09J7/10; C09J7/38; C09J11/06; C09J201/00
Foreign References:
| JP2019143090A | 2019-08-29 | |||
| JP2021038365A | 2021-03-11 | |||
| JP2019116548A | 2019-07-18 | |||
| JP2020147739A | 2020-09-17 | |||
| JP2017095658A | 2017-06-01 | |||
| JP2022029725A | 2022-02-18 |
Attorney, Agent or Firm:
OKAMOTO, Hiroyuki et al. (JP)
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