发明名称 Multistep Process for Preparing Heterophasic Propylene Copolymers
摘要 A multistage process for obtaining an heterophasic propylene polymer comprising the following steps: step a) contacting under polymerization conditions propylene and optionally ethylene or one or more alpha olefins in the presence of a catalysts system, supported on a porous organic polymer, comprising: ii) one or more metallocene compounds of formula (I) wherein: M is an atom of a transition metal; p is an integer from 0 to 3; X, same or different, is a hydrogen atom, a halogen atom, or a hydrocarbon group; L is a divalent bridging group; R<SUP>1</SUP>, is a linear or branched, saturated or unsaturated C<SUB>1</SUB>-C<SUB>20</SUB>-alkyl radical; R<SUP>2 </SUP>is a branched C<SUB>1</SUB>-C<SUB>20</SUB>alkyl radical; T, equal to or different from each other, is a moiety of formula (IIIa) or (IIIb): wherein: the atom marked with the symbol * bonds the atom marked with the same symbol in the compound of formula (I); R<SUP>5</SUP>-R<SUP>13</SUP>, equal to or different from each other, are hydrogen atoms or hydrocarbon groups; ii) an alumoxane or a compound capable of forming an alkyl metallocene cation; and optionally iii) an organo aluminium compound; step b) contacting, under polymerization conditions, in a gas phase, ethylene and one or more alpha olefins and optionally a non-conjugated diene, in the presence of the polymer obtained in step a) and optionally in the presence of an additional organo aluminium compound.
申请公布号 US2007276095(A1) 申请公布日期 2007.11.29
申请号 US20040571404 申请日期 2004.08.04
申请人 BASELL POLYOLEFINE GMBH 发明人 RESCONI LUIGI;FERRARI PAOLO;CECCHIN GIULIANO
分类号 C08L23/04;C08F4/659;C08F10/00;C08F210/06;C08F297/08;C08L23/08;C08L23/14 主分类号 C08L23/04
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