发明名称 |
THERMOPLASTIC POLYOLEFINS WITH HIGH FLOWABILITY AND EXCELLENT SURFACE QUALITY PRODUCED BY A MULTISTAGE PROCESS |
摘要 |
Reactor grade thermoplastic polyolefins with high flowability and excellent surface quality comprising (A) 40-90 wt % of a propylene homo- or copolymer matrix with an MFR in accordance with ISO 1 133 (230° C., 2.16 kg load) of >200 g/10 min and (B) 2-30 wt % of an elastomeric ethylene-propylene copolymer having an intrinsic viscosity IV (according to ISO 1628 with decalin as solvent) of ≦̸2.8 dl/g and an ethylene content of >50 to 80 wt % and (C) 8-30 wt % of an elastomeric ethylene-propylene copolymer having an intrinsic viscosity IV (according to ISO 1628 with decalin as solvent) of 3.0-6.5 dl/g and an propylene content of 50 to 80 wt %, the reactor grade thermoplastic polyolefins being obtainable by a multistage polymerization process with at least 3 polymerization steps 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) an organometallic cocatalyst and (iii) 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, as well as the use of these reactor grade thermoplastic polyolefins and molded articles produced from them. |
申请公布号 |
EP2294129(A1) |
申请公布日期 |
2011.03.16 |
申请号 |
EP20090765793 |
申请日期 |
2009.06.12 |
申请人 |
BOREALIS AG |
发明人 |
GREIN, CHRISTELLE;BERNREITER, KLAUS |
分类号 |
C08L23/12;C08F2/00;C08F4/646;C08F210/06;C08F210/16 |
主分类号 |
C08L23/12 |
代理机构 |
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代理人 |
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