Adhesive layer-equipped transparent surface material, display device and processes for their production

Abstract

Provided is an adhesive layer-equipped transparent surface material that can easily be bonded to another surface material (a display panel, etc.) and that, when bonded to another surface material, is less likely to have voids left at the interface between the adhesive layer and another surface material. An adhesive layer-equipped transparent surface material 1 comprises an adhesive layer 14 formed on at least one surface of a protective plate 10 (a transparent surface material), wherein the adhesive layer 14 has a layer portion 18 spreading over the surface of the protective plate 10 and a barrier portion 20 surrounding the periphery of the layer portion 18; and the layer portion 18 has a shear modulus at 35° C. of from 0.5 to 100 kPa.

1 - 13 . (canceled) 
     
     
         14 . A display device comprising:
 a display panel; and   an adhesive layer-equipped transparent surface material, the adhesive layer-equipped transparent surface material comprising a transparent surface material and an adhesive layer formed on at least one surface of the transparent surface material, and being bonded to the display panel such that the adhesive layer is in contact with the display panel,   wherein the adhesive layer has a layer portion spreading over the at least one surface of the transparent surface material,   wherein the layer portion has a shear modulus at 35° C. of from 0.5 to 100 kPa,   wherein the layer portion is a cured product of a layer portion-forming curable resin composition which comprises a curable compound (II) and a non-curable oligomer (D), and   wherein the curable compound (II) is at least one curable compound which undergoes a curing reaction at the time of curing the layer portion-forming curable resin composition, provided that the at least one curable compound has a hydroxy group which is not reactive at the time of curing the layer portion-forming curable resin composition.   
     
     
         15 . The display device according to  claim 14 , wherein the display panel is a liquid crystal display panel of in-plane switching system. 
     
     
         16 . The display device according to  claim 14 , wherein the curable compound (II) comprises a monomer which has a curable group and a hydroxy group. 
     
     
         17 . The display device according to  claim 16 ,
 wherein the curable compound (II) comprises an oligomer (A′) which has a curable group and has a number average molecular weight of from 1,000 to 100,000, and a monomer (B′) which has a curable group and has a number average molecular weight of from 125 to 600, and   wherein the monomer (B′) comprises a monomer (B3) having a hydroxy group.   
     
     
         18 . The display device according to  claim 14 , wherein the non-curable oligomer (D) has a hydroxy group, and does not undergo a curing reaction with the curable compound (II) at the time of curing the layer portion-forming curable composition. 
     
     
         19 . The display device according to  claim 18 , wherein the non-curable oligomer (D) is a polyoxyalkylene polyol, and the oligomer (A′) is a urethane oligomer synthesized by using a polyoxyalkylene polyol and a polyisocyanate as raw materials. 
     
     
         20 . The display device according to  claim 17 , wherein the oligomer (A′) has an acryloyloxy group, and at least part of the monomer (B′) has a methacryloyloxy group. 
     
     
         21 . The display device according to  claim 17 , wherein the monomer (B3) comprises a hydroxyl methacrylate which has a C 3-8  hydroxyalkyl group having from 1 to 2 hydroxy groups. 
     
     
         22 . The display device according to  claim 17 , wherein the monomer (B′) comprises a monomer (B4) which is an alkyl methacrylate having a C 8-22  alkyl group. 
     
     
         23 . The display device according to  claim 17 , wherein the layer portion-forming curable resin composition does not contain a chain transfer agent, or comprises a chain transfer agent in an amount of at most 1 part by mass per 100 parts by mass of the curable compound (II). 
     
     
         24 . The display device according to  claim 14 , wherein the layer portion-forming curable resin composition comprises a photo-polymerization initiator (C2), and the curable compound (II) is a photo-curable compound. 
     
     
         25 . The display device according to  claim 14 , wherein the transparent surface material is a protective plate for the display device.