| 摘要 |
<p>A propylene polymer and a composition thereof which have excellent melt flowability, are reduced in the content of tacky ingredients, have a low modulus, are flexible, give transparent moldings, and are useful as substitutes for soft vinyl chloride resins. The moldings are excellent in low-temperature heat sealability, transparency, and rigidity. The polymer, for example, has a content of stereoregular isotactic pentads (mmmm content) of 30 to 80 %, a molecular weight distribution (Mw/Mn) of 3.5 or lower, and an intrinsic viscosity [θ] of 0.8 to 5 dl/g.</p> |
