发明名称 |
PROCESS FOR THE PREPARATION OF A PROPYLENE POLYMER |
摘要 |
A process for the preparation of a propylene polymer in a multistage polymerisation process in the presence of a single site catalyst, said process comprising: (I) in a prepolymerisation step prepolymerising a single site catalyst in the presence of propylene and optionally at least one C2-10 alpha olefin comonomer and in the presence of hydrogen or in the absence of hydrogen; (II) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, with the prepolymerised catalyst of step (I) in the presence of hydrogen; and subsequently (III) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (II) and optionally in the presence of hydrogen so as to form a propylene homopolymer or copolymer; wherein the amount of hydrogen fed to the prepolymerisation step (I) is at most 15% of the total amount of hydrogen fed to steps (I) and (II) of the polymerisation process. |
申请公布号 |
WO2014198677(A1) |
申请公布日期 |
2014.12.18 |
申请号 |
WO2014EP61930 |
申请日期 |
2014.06.09 |
申请人 |
BOREALIS AG |
发明人 |
TÖLTSCH, WILFRIED;RESCONI, LUIGI;REICHELT, KRISTIN |
分类号 |
C08F2/00;C08F4/00;C08F10/06;C08F210/06 |
主分类号 |
C08F2/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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