Title:
PRESSURE-SENSITIVE ADHESIVE COMPOSITION FOR POLARIZING PLATE, AND POLARIZING PLATE WITH PRESSURE-SENSITIVE ADHESIVE LAYER
Document Type and Number:
WIPO Patent Application WO/2023/136052
Kind Code:
A1
Abstract:
One embodiment of the present invention relates to a pressure-sensitive adhesive composition for a polarizing plate or a polarizing plate with a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive composition for a polarizing plate satisfies requirements (i) and (ii) below. (i) The slope (Δ stress (ΔN)/Δ deformation quantity (Δmm)) in an elastic deformation region, as calculated from the adhesive shear strength test described below, of a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition for a polarizing plate is 11.0 N/mm or greater. (ii) The break distance in the adhesive shear strength test described below of a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition for a polarizing plate is 3.0 mm or greater. (Adhesive shear strength test) The pressure-sensitive adhesive layer of an adhesive sheet for testing obtained by layering a 200 μm-thick pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition for a polarizing plate upon a 100 μm-thick polyethylene terephthalate film is adhered to a glass plate in an adhesion area of 15 mm × 20 mm and autoclaved for 20 minutes in a 50°C, 5 atm environment, and then the deformation quantity, stress, and break distance when pulled at a pulling speed of 0.6 mm/min in a shear direction in a 115°C dry environment are measured.
Inventors:
KONDO KEIKO (JP)
Application Number:
PCT/JP2022/046778
Publication Date:
July 20, 2023
Filing Date:
December 20, 2022
Export Citation:
Assignee:
SOKEN KAGAKU KK (JP)
International Classes:
C09J11/06; C09J7/38; C09J133/00; C09J201/00; G02B5/30
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Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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