| 摘要 |
The invention relates to a polyolefin containing the following monomer units: a) a maximum of 25 wt. % of units derived from ethene, b) a maximum of 75 wt. % of units derived from propene, and c) between 5 and 100 wt. % of units derived from an alpha-olefin containing between 4 and 20 C atoms. The inventive polyolefin has the following parameters: d) a weight-average molecular weight of between 70,000 and 10,000,000 g/mol, e) a polydispersity of between 4 and 60, f) a melting viscosity, measured by oscillation rheometry with a shearing speed of 1 Hz at 190 °C, of between 100,000 and 100,000,000 mPa s, g) a needle penetration of between 3 and 70 0.1 mm, h) a melting enthalpy of between 2 and 100 J/g, i) a glass transition temperature Tg of between-15 °C and-80 °C, and j) an end of the crystalline part melting range at between 85 and 175 °C. The inventive polyolefin is compatible both with ethylene polymers and propylene polymers, and is suitable for using in films, sealing strips, and moulded parts.
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