US 12,454,631 B2
Optical laminate with double-sided adhesive layer, and optical device
Daisuke Hattori, Ibaraki (JP); Ryota Morishima, Ibaraki (JP); Takahiro Yoshikawa, Ibaraki (JP); and Atsushi Kishi, Ibaraki (JP)
Assigned to NITTO DENKO CORPORATION, Ibaraki (JP)
Appl. No. 17/912,610
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
PCT Filed Mar. 23, 2021, PCT No. PCT/JP2021/011870
§ 371(c)(1), (2) Date Sep. 19, 2022,
PCT Pub. No. WO2021/193591, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-053181 (JP), filed on Mar. 24, 2020.
Prior Publication US 2023/0312991 A1, Oct. 5, 2023
Int. Cl. C09J 7/38 (2018.01); G02B 1/14 (2015.01)
CPC C09J 7/385 (2018.01) [G02B 1/14 (2015.01); C09J 2301/124 (2020.08); C09J 2301/312 (2020.08)] 13 Claims
OG exemplary drawing
 
1. An optical laminate with pressure-sensitive adhesive layers, comprising:
a low-refractive index layer;
a first pressure-sensitive adhesive layer arranged adjacent to the low-refractive index layer;
a second pressure-sensitive adhesive layer serving as one outermost layer; and
a protective layer arranged between the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer, and
a substrate arranged adjacent to the low-refractive index layer,
wherein the low-refractive index layer has a porosity of 40 vol % or more,
wherein the first pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of from 1.0×105 (Pa) to 1.0×107 (Pa),
wherein the second pressure-sensitive adhesive layer has a storage modulus of elasticity at 23° C. of 1.0×105 (Pa) or less,
wherein a ratio of a thickness of the low-refractive index layer to a total thickness of the pressure-sensitive adhesive layers present in the optical laminate with pressure-sensitive adhesive layers is from 0.10% to 5.00%, and
wherein the second pressure-sensitive adhesive layer is not adjacent to the first pressure-sensitive adhesive layer.