| 摘要 |
A process for manufacturing bimodal olefin polymers and copolymers having a ratio between low molecular weight fractions and high molecular weight fractions within the range of 40:60-70:30, by mixing under shear conditions 5-50 per cent by weight of a low molecular weight unimodal polyolefin having a molecular weight (Mw) between 15,000-30,000, and 95-50 per cent by weight of a bimodal polyolefin having a ratio between low molecular weight fractions and high molecular weight fractions within the range of 30:70-55:45. According to the preferred embodiment there is used a multi-phase process comprising a loop reactor followed by a gas-phase reactor, wherein a part of the product coming out from the loop reactor is separated and combined with the bimodal product coming out from the gas-phase reactor. |
