| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition, capable of providing a thick wall even by blow molding without surface skin roughness, etc., and manifesting excellent blow moldability and useful for producing a blow molded product excellent in weather resistance and surface hardness by limiting the melt flow rate and the elongational viscosity within specific ranges. SOLUTION: This composition is a methyl methacrylate-based resin composition having 0.5-20g/10min melt flow rate(MFR) at 230 deg.C under 3.8kg load and the elongational viscosity (ηE) at 230 deg.C satisfying the formula log(ηE)>=-(2/3)log(MFR)+6.43 and comprises, e.g. (A) 30-100wt.% branched methyl methacrylate- based polymer having 80,000-400,000 weight-average molecular weight(MW) and 30,000-500,000 molecular weight (Mzb ) between branched points specified from the Z-average molecular weight and (B) 0-70wt.% linear methacrylic resin having 70,000-300,000MW. |
