Method for producing (meth)acrylic resin composition
A technology of methyl methacrylate and a manufacturing method, which is applied in the field of manufacturing acrylic resin compositions, can solve problems such as poor craze formation, and achieve the effects of good formability, excellent optical properties, and less foreign matter
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Embodiment 1
[0090]To the raw material liquid (A) containing methyl methacrylate (MMA), methyl acrylate (MA) and n-octyl mercaptan (OM), the raw material liquid (B) containing azobisisobutyronitrile (AIBN) and MMA was added ) and mixed to obtain a mixed raw material solution containing 98.9 parts by mass of MMA, 1.1 parts by mass of MA and 0.257 parts by mass of OM and containing AIBN with a concentration of 74ppm. This mixed raw material liquid was continuously supplied to a polymerization reaction tank at 140° C., bulk polymerization was carried out in the polymerization reaction tank with an average residence time of 2 hours, and the reaction product was continuously discharged from the polymerization reaction tank. The supply of the mixed raw material liquid, the bulk polymerization and the discharge of the reaction product are carried out simultaneously and in parallel. The polymerization conversion rate was 52%.
[0091] In addition, the polymerization conversion rate was determined...
Embodiment 2
[0108] The amount of MMA, MA, OM and AIBN was changed to the amount shown in Table 1, and 0.150 parts by mass of monoglyceride stearate and 0.020 parts by mass of ultraviolet absorber (JF-77 manufactured by Chengbei Chemical) were changed to stearic acid 0.075 parts by mass of alcohol, 0.025 parts by mass of monoglyceride stearate, and 0.010 parts by mass of antioxidant (HP-10 manufactured by ADEKA) to make the polymerization conversion rate 60%, and obtain by the same method as Example 1 Powdery resin composition. The physical properties of this resin composition were measured by the same method as in Example 1. The results are shown in Table 1.
Embodiment 3
[0110] Except having changed the storage temperature of a liquid additive from 120 degreeC to 140 degreeC, the powdery resin composition was obtained by the method similar to Example 2 at the polymerization conversion rate of 60%. The physical properties of this resin composition were measured by the same method as in Example 1. The results are shown in Table 1.
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