Binder composition, binder layer, optical laminate and image display device

A technology of adhesives and compositions, applied in optics, optical elements, nonlinear optics, etc., to achieve excellent coating properties and good liquid crystal orientation

CN111727388AActive Publication Date: 2020-09-29FUJIFILM CORP
54 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-09-29

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention addresses the problem of providing a binder composition from which a binder layer having excellent upper layer coatability and good liquid crystal alignment properties can be formed, a binder layer, an optical laminate and an image display device. The binder composition according to the present invention comprises a binder, a polymerization initiator, a surfactant and a photo-alignment agent, wherein the surfactant and the photo-alignment agent respectively have functional groups capable of forming a hydrogen bond together, and one of the functional groups capable of forming a hydrogen bond of the surfactant and the photo-alignment agent is a proton donor functional group while the other is a proton acceptor functional group.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to an adhesive composition, an adhesive layer, an optical laminate, and an image display device. Background technique

[0002] Optical films such as optical compensation sheets and retardation films are used in various image display devices from the viewpoint of eliminating image coloring and widening the viewing angle.

[0003] A stretched birefringent film is used as an optical film, but in recent years, instead of the stretched birefringent film, an optically anisotropic layer using a liquid crystal compound has been proposed.

[0004] For example, in Patent Document 1, it is described that when producing a retardation film having at least two optically anisotropic layers, a liquid crystal composition containing A liquid crystal composition of a liquid crystal compound having a polymerizable group and a photo-alignment compound ([Claim 1] [Claim 6] [Claim 8]).

[0005] Previous technical literature

[0006] patent do...

Examples

Embodiment 1

[0291] 〔Preparation of the adhesive layer〕

[0292] Epoxy monomer (CEL2021P, manufactured by DAICEL CORPORATION) (100 parts by mass), photoacid generator (B-1-1) (5.0 parts by mass) represented by the following formula, photoalignment agent SHD1 (2.0 parts by mass) ) and surfactant SKA1 (1.0 parts by mass) were dissolved in methyl ethyl ketone (300 parts by mass) to prepare a solution for forming an adhesive layer.

[0293]Spin-coat the prepared solution for forming an adhesive layer on a cleaned glass substrate, and irradiate the irradiance with 365 nm UV (ultraviolet: ultraviolet light)-LED (light emitting diode: light emitting diode) at room temperature 500mJ / cm 2 UV rays to create an adhesive layer.

[0294] The film thickness is about 3 μm. In addition, the surface energy of the pressure-sensitive adhesive layer was 51 mN / m.

[0295] [chemical formula 20]

[0296]

[0297] [Irradiation process (impartment of orientation function)]

[0298] Irradiate the obtained ...

Embodiment 2

[0304] An optical laminate was produced in the same manner as in Example 1, except that the photo-alignment agent SHD1 was changed to the photo-alignment agent SHA1, and the surfactant SKA1 was changed to the surfactant SKD1 represented by the following formula.

[0305] [chemical formula 22]

[0306]

Embodiment 3

[0308] An optical laminate was produced in the same manner as in Example 1 except that the epoxy monomer was changed to EPOLEAD GT401 (manufactured by DAICEL CORPORATION).