Thermosetting antistatic coating agent and its cured film, plastic film
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[0092] Hereinafter, the present invention will be specifically described by way of examples and comparative examples. However, it goes without saying that the technical scope of the present invention is not limited by these examples. "Parts" and "%" in the examples are based on mass unless otherwise specified.
[0093] In each production example, the glass transition temperature is a value measured with a differential scanning calorimeter (product name "DSC6200", manufactured by Seiko Instruments Co., Ltd.). The number average molecular weight is a polystyrene-equivalent value measured with a coagulation permeation chromatography (product name "HLC-8220GPC", manufactured by Tosoh Corporation).
[0094]
manufacture example 1
[0096] 16 parts of acrylic acid and 144 parts of methyl methacrylate were put into a four-necked flask equipped with a nitrogen inlet tube, a thermometer, a reflux condenser and a stirring device, and 446 parts of isopropanol were further added to prepare a monomer solution. Next, 3.2 parts of 2,2'-azobisisobutyronitrile was added as a polymerization initiator to this monomer solution. Next, the reaction system was brought to 80° C., and a radical polymerization reaction was performed for 8 hours. Then, 22.4 parts of triethylamine and 1000 parts of ion-exchanged water were added to the reaction system, fully stirred, and cooled to normal temperature to obtain an acrylic copolymer (A-1 ) components of the solution. (A-1) The amount of carboxylate anion groups of the component was 0.00139 mol / g, the glass transition temperature was 100° C., and the number average molecular weight was 30,000.
manufacture example 2
[0098] 24 parts of acrylic acid and 136 parts of methyl methacrylate were charged into the same four-necked flask as in Production Example 1, and 435 parts of isopropanol was further added to prepare a monomer solution. Next, 3.2 parts of azobisisobutyronitrile was added as a polymerization initiator to this monomer solution. Next, a radical polymerization reaction was performed for 8 hours after the temperature of the reaction system was raised to 80°C. Then, 33.7 parts of triethylamine and 1000 parts of ion-exchanged water were added to the reaction system, fully stirred, and cooled to normal temperature to obtain an acrylic copolymer (A-2 ) components of the solution. In addition, the carboxylate anion group quantity of (A-2) component was 0.00208 mol / g, glass transition temperature was 95 degreeC, and number average molecular weight was 30000.
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