Placcel fm 3

Example 5

A reactor equipped with a stirrer, a thermometer, a condenser, a nitrogen gas inlet and a dropping device was charged with 1,000 parts of butyl acetate and the temperature was raised to 100° C. under stirring. Next, a mixture consisting of 620 parts of polyester-containing acrylic monomer (Placcel® FM-3, from Daicel Chemical Industries, Ltd.), 317 parts of methyl methacrylate, 63 parts of 2-hydroxyethyl methacrylate and 12 parts of 2,2′-azobisisobutyronitrile was added dropwise over 4 hours. After the end of dropwise addition, the reaction was effected for 6 hours at the same temperature. Following reaction completion, 532 parts of butyl acetate and 520 parts of polycaprolactone diol (Praccel L205AL, from Daicel Chemical Industries, Ltd.) were charged and mixed in, giving a clear acrylic polyol resin solution (Polyol 5) having a solids content of 50%, a viscosity of 600 mPa·s (25° C.), a weight-average molecular weight of 70,000, and a hydroxyl value of 142 mgKOH/g (solids).

Example 2

A reactor equipped with a stirrer, a thermometer, a condenser, a nitrogen gas inlet and a dropping device was charged with 1,000 parts of butyl acetate and the temperature was raised to 100° C. under stirring. Next, a mixture consisting of 620 parts of polyester-containing acrylic monomer (Placcel® FM-3, from Daicel Chemical Industries, Ltd.), 317 parts of methyl methacrylate, 63 parts of 2-hydroxyethyl methacrylate and 18 parts of 2,2′-azobisisobutyronitrile was added dropwise over 4 hours. After the end of dropwise addition, the reaction was effected for 6 hours at the same temperature. Following reaction completion, 1,378 parts of butyl acetate and 1,360 parts of polycaprolactone diol (Praccel L205AL, from Daicel Chemical Industries, Ltd.) were charged and mixed in, giving a clear acrylic polyol resin solution (Polyol 2) having a solids content of 50%, a viscosity of 230 mPa·s (25° C.), a weight-average molecular weight of 30,000, and a hydroxyl value of 171 mgKOH/g (solids).

Example 4

A reactor equipped with a stirrer, a thermometer, a condenser, a nitrogen gas inlet and a dropping device was charged with 1,000 parts of butyl acetate and the temperature was raised to 100° C. under stirring. Next, a mixture consisting of 620 parts of polyester-containing acrylic monomer (Placcel® FM-3, from Daicel Chemical Industries, Ltd.), 317 parts of methyl methacrylate, 63 parts of 2-hydroxyethyl methacrylate and 15 parts of 2,2′-azobisisobutyronitrile was added dropwise over 4 hours. After the end of dropwise addition, the reaction was effected for 6 hours at the same temperature. Following reaction completion, 535 parts of butyl acetate and 520 parts of polycaprolactone diol (Praccel L205AL, from Daicel Chemical Industries, Ltd.) were charged and mixed in, giving a clear acrylic polyol resin solution (Polyol 4) having a solids content of 50%, a viscosity of 510 mPa·s (25° C.), a weight-average molecular weight of 50,000, and a hydroxyl value of 142 mgKOH/g (solids).

Example 17

Production of Acrylic Resin Solution

28 parts of Swasol 1000 (Cosmo Oil Co., Ltd., aromatic hydrocarbon-based solvent), 85 parts of toluene, 41.6 parts of styrene, 6.9 parts of n-butyl acrylate, 19 parts of isobutyl methacrylate, 15 parts of PLACCEL PM-3 (*14), 17 parts of 2-hydroxyethyl methacrylate, 0.5 parts of acrylic acid, and 8 parts of di-tert-butyl hydroperoxide were reacted under nitrogen gas at 110° C., thus obtaining an acrylic resin solution having a solids mass content of 45%. The obtained acrylic resin has an acid value of 3.9 mg KOH/g, hydroxy value of 94.9 mg KOH/g, and weight average molecular weight of 11,000.

(*14) PLACCEL FM-3: Daicel Chemical Industries, Ltd., trade name, ε-caprolactone modified vinyl monomer of 2-hydroxyethyl acrylate