Title:
TRANSPARENT ADHESIVE OPTICAL SHEET, LAMINATE AND BONDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/026577
Kind Code:
A1
Abstract:
The present invention provides a transparent adhesive optical sheet which has excellent flexibility, while being suppressed in the occurrence of delayed bubbles in a high-temperature high-humidity environment. A transparent adhesive optical sheet according to the present invention sequentially comprises a first surficial adhesive layer, an intermediate adhesive layer and a second surficial adhesive layer in this order. The storage elastic moduli of the first surficial adhesive layer and the second surficial adhesive layer at 85°C are higher than the storage elastic modulus of the intermediate adhesive layer at 85°C; the storage elastic moduli of the first surficial adhesive layer and the second surficial adhesive layer at 85°C are from 3.0 × 104 Pa to 30.0 × 104 Pa (inclusive); the storage elastic modulus of the intermediate adhesive layer at 85°C is from 1.0 × 104 Pa to 15.0 × 104 Pa (inclusive); and the intermediate adhesive layer contains a polyurethane.
Inventors:
NAITO HIROKI (JP)
TAKAGI DAISUKE (JP)
TAKAGI DAISUKE (JP)
Application Number:
PCT/JP2018/026156
Publication Date:
February 07, 2019
Filing Date:
July 11, 2018
Export Citation:
Assignee:
BANDO CHEMICAL IND (JP)
International Classes:
C09J7/38; B32B7/02; B32B27/00; B32B27/40; C09J133/00; C09J175/04; C09J201/00
Domestic Patent References:
| WO2011129200A1 | 2011-10-20 |
Foreign References:
| JP2017075281A | 2017-04-20 | |||
| JP2017082169A | 2017-05-18 | |||
| JP2013018832A | 2013-01-31 | |||
| JP2016108384A | 2016-06-20 | |||
| JP2016074750A | 2016-05-12 | |||
| JP2014214198A | 2014-11-17 | |||
| JP2012184390A | 2012-09-27 | |||
| US20170121564A1 | 2017-05-04 | |||
| JP2016160408A | 2016-09-05 | |||
| JP2015224320A | 2015-12-14 |
Other References:
See also references of EP 3663374A4
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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