US 12,215,258 B2
Pressure-sensitive adhesive sheet and use thereof
Ryoko Asai, Ibaraki (JP); Naofumi Kosaka, Ibaraki (JP); and Yosuke Shimizu, Ibaraki (JP)
Assigned to NITTO DENKO CORPORATION, Ibaraki (JP)
Appl. No. 17/632,192
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
PCT Filed Jul. 28, 2020, PCT No. PCT/JP2020/028918
§ 371(c)(1), (2) Date Feb. 1, 2022,
PCT Pub. No. WO2021/024863, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 2019-143393 (JP), filed on Aug. 2, 2019.
Prior Publication US 2022/0275254 A1, Sep. 1, 2022
Int. Cl. C09J 7/38 (2018.01); C09J 4/06 (2006.01); C09J 11/06 (2006.01)
CPC C09J 7/385 (2018.01) [C09J 4/06 (2013.01); C09J 11/06 (2013.01); C09J 2301/12 (2020.08); C09J 2301/208 (2020.08); C09J 2301/416 (2020.08); C09J 2301/50 (2020.08); C09J 2433/00 (2013.01); C09J 2451/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer, wherein
the pressure-sensitive adhesive layer has a multilayer structure comprising a layer A forming one face of the pressure-sensitive adhesive layer and a layer B placed on a backside of the layer A, and
the layer B is a photo-crosslinkable pressure-sensitive adhesive layer comprising a photo-crosslinkable polymer as a base polymer.