OPTICAL LAMINATE AND WAVELENGTH CONVERSION SHEET

• US 20190329528A1
• Filed: 07/03/2019
• Published: 10/31/2019
• Est. Priority Date: 01/05/2017
• Status: Active Grant

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: MURATA, Koji, SUZUTA, Masayoshi
• Granted Patent: US 11,285,697 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/20 Inorganic coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/16 specially treated, e.g. irradiated
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09D 133/00 Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• CPC Class Codes: C09D 175/12 from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
• CPC Class Codes: C09D 181/00 Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C23C 14/10 Glass or silica
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer

Abstract

An optical laminate comprising an adherend including a curable resin, and a barrier film laminated on at least one surface of the adherend, wherein the barrier film comprises, on an outermost surface facing the adherend, a primer layer formed by curing a primer composition containing a silane coupling agent having a reactive functional group capable of reacting with the curable resin, other than an alkoxysilane group and a silanol group, and assuming that a thickness of the primer layer is D, a total content of the reactive functional group and the reactive functional group that has reacted with the curable resin per 1 m²×D of the primer layer is 1.5×10⁻⁶ mol or higher and 3.5×10⁻³ mol or lower.

Claims

1. An optical laminate comprising an adherend including a curable resin, and a barrier film laminated on at least one surface of the adherend, wherein

the barrier film comprises, on an outermost surface facing the adherend, a primer layer formed by curing a primer composition containing a silane coupling agent having a reactive functional group capable of reacting with the curable resin, other than an alkoxysilane group and a silanol group, and

assuming that a thickness of the primer layer is D, a total content of the reactive functional group and the reactive functional group that has reacted with the curable resin per 1 m²×

D of the primer layer is 1.5×

10<sup>−

6</sup> mol or higher and 3.5×

10<sup>−

3</sup> mol or lower.

2. The optical laminate of claim 1, wherein the total content of the reactive functional group and the reactive functional group that has reacted with the curable resin per unit volume of the primer layer is 1.5×

10<sup>−

3</sup> mol/cm³ or higher and 7.0×

10<sup>−

3</sup> mol/cm³ or lower.

3. The optical laminate of claim 1, wherein the curable resin is a resin that can be cured by ultraviolet light and/or thermally.

4. A wavelength conversion sheet comprising a phosphor layer including a curable resin and a phosphor, and a barrier film laminated on at least one surface of the phosphor layer, wherein

the barrier film comprises, on an outermost surface facing the phosphor layer, a primer layer formed by curing a primer composition containing a silane coupling agent having a reactive functional group capable of reacting with the curable resin, other than an alkoxysilane group and a silanol group, and

assuming that a thickness of the primer layer is D, a total content of the reactive functional group and the reactive functional group that has reacted with the curable resin per 1 m²×

D of the primer layer is 1.5×

10<sup>−

6</sup> mol or higher and 3.5×

10<sup>−

3</sup> mol or lower.

5. The wavelength conversion sheet of claim 4, wherein the total content of the reactive functional group and the reactive functional group that has reacted with the curable resin per unit volume of the primer layer is 1.5×

10<sup>−

3</sup> mol/cm³ or higher and 7.0×

10<sup>−

3</sup> mol/cm³ or lower.

6. The wavelength conversion sheet of claim 4, wherein the curable resin comprises an acrylic resin, and the reactive functional group comprises at least one selected from the group consisting of a vinyl group, an acrylic group, a methacrylic group, and a mercapto group.

7. The wavelength conversion sheet of claim 4, wherein the curable resin comprises an epoxy resin, and the reactive functional group comprises at least one selected from the group consisting of an epoxy group, an amino group, and a mercapto group.

8. The wavelength conversion sheet of claim 4, wherein the curable resin comprises a thiol resin, and the reactive functional group comprises at least one selected from the group consisting of an epoxy group, a mercapto group, a vinyl group, and a methacrylic group.