发明名称 |
HOCHREINE HETEROPHASIGE PROPYLENCOPOLYMERE |
摘要 |
High purity heterophasic polypropylene copolymers comprising (A) 73 to 98 wt % of a propylene homo- or copolymer matrix with an MFR2 in accordance with ISO 1133 (230° C., 2.16 kg load) of ≧45 g/10 min and (B) 2 to 27 wt % of an elastomeric copolymer, comprising propylene in an amount of at least 50 wt % of component (B) and at least ethylene and/or one other C4 to C10 alpha olefin in an amount of up to 50 wt % of component (B), the heterophasic polypropylene copolymers being obtainable by a multistage polymerization process in the presence of a catalyst system comprising (i) a Ziegler-Natta procatalyst which contains a trans-esterification product of a lower alcohol and a phthalic ester and (ii) optionally an organometallic cocatalyst and (iii) an external donor represented by formula (I) Si(OCH2CH3)3(NR1R2) wherein R1 and R2 can be the same or different a represent a hydrocarbon group having 1 to 12 carbon atoms, their production and use. |
申请公布号 |
AT551395(T) |
申请公布日期 |
2012.04.15 |
申请号 |
AT20080873974T |
申请日期 |
2008.12.18 |
申请人 |
BOREALIS AG |
发明人 |
GREIN, CHRISTELLE;BERNREITER, KLAUS;VESTBERG, TORVALD |
分类号 |
C08L23/12;C08F2/00;C08F4/646;C08F4/651;C08F210/06;C08L23/10 |
主分类号 |
C08L23/12 |
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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