Pressure-sensitive adhesive sheet and laminate
A pressure-sensitive adhesive layer, pressure-sensitive adhesive technology, applied in the direction of pressure-sensitive film/sheet, adhesive type, ester copolymer adhesive, etc., can solve problems such as reflection loss, and achieve height difference followability Excellent, heat-and-moisture whitening resistance and excellent durability
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Embodiment 1
[0145] 1. Preparation of (meth)acrylate copolymer
[0146] Into a reaction vessel with a stirrer, a thermometer, a reflux cooler, a dripping device, and a nitrogen gas introduction pipe, 90 parts by mass of n-butyl acrylate, 10 parts by mass of acrylic acid, 200 parts by mass of ethyl acetate, and 2,2'- 0.18 parts by mass of azobisisobutyronitrile, and the air in the reaction container was replaced with nitrogen. The temperature of the reaction solution was raised to 60° C. while stirring under the nitrogen atmosphere, and the reaction was carried out for 16 hours, and then cooled to room temperature. Here, a part of the obtained solution was measured for molecular weight by the method mentioned later, and it confirmed that the (meth)acrylate copolymer (A) with a weight average molecular weight of 400,000 was produced|generated.
[0147] 2. Preparation of pressure-sensitive adhesive composition
[0148] 100 parts by mass of the (meth)acrylate copolymer (A) obtained in the ab...
Embodiment 2～9
[0159] [Examples 2-9, Comparative Examples 1-3]
[0160] In addition to the proportion of each monomer constituting the (meth)acrylate copolymer (A), the weight average molecular weight of the (meth)acrylate copolymer (A), the type and compounding of the active energy ray-curable component (B), The amount, the type and compounding amount of the crosslinking agent (C), the compounding amount of the photopolymerization initiator (D), the compounding amount of the silane coupling agent, and the thickness of the pressure-sensitive adhesive layer were changed as shown in Table 1, It carried out similarly to Example 1, and produced the pressure-sensitive adhesive sheet. In addition, in Example 2, the thickness of each coating layer of the heavy-release type release sheet to which the coating layer is attached and the light-release type release sheet to which the coating layer is attached is 75 μm, and the thickness of the pressure-sensitive adhesive layer is 150 μm. Manufacture of ...
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