| 摘要 |
PURPOSE:To obtain the titled composition having high extensibility, capable of being stuck fast to a mold of original form in vacuum in the use of sand mold for casting, by blending a specific copolymer of ethylene and an alpha-olefin with specific amounts of a linear low-density polyethylene and a plasticizer. CONSTITUTION:(A) 100pts.wt. copolymer of ethylene and >=3C alpha-olefin (e.g. propylene, etc.) having <=2g/10min melt index, <=0.91g/cm<3> density and <=30 flow ratio is blended with (B) <=70pts.wt., preferably 10-60pts.wt. linear low- density polyethylene having <=10g/10min melt index, >=500% elongation, <=0.935g/cm<3> density and 10-70 flow ratio and (C) 0.1-20pts.wt., preferably 0.2-10pts.wt. plasticizer (e.g. dimethyl phthalate, etc.). |
