| 摘要 |
<p>A novel propylene polymer capable of imparting satisfactory suitability for bonding and coating to a propylene polymer. It is a propylene copolymer having propylene satisfying the following requirements (1) to (3): the weight-average molecular weight Mw as measured by GPC is 5,000 to 1,000,000, excluding 1,000,000; when the peak attributable to the carbon atoms of the methyl groups in propylene unit segments formed through head-to-tail bonding is examined by 13C-NMR and the chemical shift of the top of the peak attributable to pentads represented by mmmm is located at 21.8 ppm, then the proportion of the area S5 of the peak whose top is located at 21.8 ppm to the total area S of the peaks appearing between 19.8 ppm and 22.2 ppm is 10 to 60% and there is the relationship 4+2S5/S6>5, wherein S6 is the area of the peak whose top is located at 21.5 to 21.6 ppm; and irregularly positioned propylene monomer units resulting from 2,1- and/or 1,3-insertion are present in the main chain and the proportion of the irregularly positioned propylene monomer units resulting from 2,1- and 1,3-insertion to all propylene units inserted is 0.05% or higher.</p> |
