| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene random copolymer having a low melting point, high molecular weight and low normal decane-soluble content and molded articles such as a film obtained from the copolymer. SOLUTION: The present invention relates to a propylene random copolymer satisfying all of the following requirements [1] to [4] and various useful articles molded from the copolymer: [1] the concentration (Pa, % by mole) of a skeleton constituent (a) derived from propylene in the propylene random copolymer and the concentration (Px, % by mole) of a skeleton constituent derived from at least one olefin selected from among ethylene (b) and 4-20Cα-olefins (c) therein satisfy relationships (Eq-1) to (Eq-3); [2] the concentration (Pa, % by mole) of a skeleton constituent (a) derived from propylene in the propylene random copolymer and the melting point (Tm) as determined with a differential scanning colorimeter satisfy relationship (Eq-4); [3] the total content of 2,1- and 1,3-bonded nonstereoregular portions is≤0.2% by mole and [4] the content of matter soluble in n-decane (nC<SB>10</SB>) is≤2.0 wt.%. COPYRIGHT: (C)2006,JPO&NCIPI |
