Adhesive layer for optical member, optical member with adhesive layer, and image display device
A technology for adhesive layers and optical components, applied in the direction of polymer adhesive additives, adhesive types, adhesive additives, etc., can solve problems such as poor bonding of optical components, wrinkles or deformation, and display defects
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manufacture example 1
[0133] Production example 1 (production of light-diffusing adhesive composition (A-1))
[0134]70 parts of 2-ethylhexyl acrylate (2EHA), N-vinyl-2-pyrrolidone (NVP ) 15 parts and 2-hydroxyethyl acrylate (HEA) 15 parts, photopolymerization initiator (trade name: Irgacure 184, manufactured by BASF Corporation) 0.1 part, then irradiate ultraviolet light until the viscosity (measurement condition: BH viscometer No.5 Rotor, 10 rpm, measurement temperature 30° C.) was about 20 Pa·s, and a prepolymer composition in which a part of the above-mentioned monomer components had been polymerized was obtained.
[0135] Next, with respect to 100 parts of the obtained prepolymer composition, 0.2 parts of isocyanate crosslinking agent (trade name: Coronate L, toluene diisocyanate adduct of trimethylolpropane, manufactured by Nippon Polyurethane Industry Co., Ltd.) was mixed. , thereby obtaining the base adhesive composition (A-1). The refractive index of the obtained base adhesive compositio...
manufacture example 2～5
[0137] Production examples 2 to 5 (production of light-diffusing adhesive compositions (A-2) to (A-5))
[0138] In Production Example 1, the addition amount of light-diffusing fine particles was changed as shown in Table 1, and light-diffusing adhesive compositions (A-2) to (A- 5).
manufacture example 6
[0139] Production example 6 (production of light-diffusing adhesive composition (A-6))
[0140] Put 100 parts of butyl acrylate, 5 parts of acrylic acid, 1 part of hydroxyethyl acrylate, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 100 parts of ethyl acetate together with a stirring blade, a thermometer, In a four-neck flask (concentration of the monomer is 50%) of a nitrogen introduction tube and a condenser, introduce nitrogen while stirring slowly to carry out nitrogen replacement, and then keep the liquid temperature in the flask at about 55° C. for 8 The polymerization reaction was carried out for several hours to prepare a solution of an acrylic polymer (A-6) having a weight average molecular weight (Mw) of 1,800,000.
[0141] With respect to 100 parts of solid content of the acrylic polymer (A-6) solution obtained above, 0.66 parts of isocyanate crosslinking agent (trade name: Coronate L, trimethylolpropane / toluene diisocyanate trimer addit...
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