申请人:TOSOH CORPORATION
公开号:US20040214953A1
公开(公告)日:2004-10-28
A polyethylene composition prepared by polymerizing ethylene and an optional olefin with ≧3 carbon atoms in the presence of a macromonomer, is provided. The macromonomer is a vinyl-terminated ethylene polymer prepared by polymerizing ethylene and an optional olefin with ≧3 carbon atoms, and the macromonomer has (A) Mn≧5,000, and Mw/Mn=2-5. The polyethylene composition comprises (C) branched polyethylene prepared by copolymerizing ethylene, the macromonomer and an optional olefin with ≧3 carbon atoms, and the macromonomer. The polyethylene composition has (D) a density of 0.890-0.980 g/cm
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, (E) Mw=30,000-10,000,000, (F) Mw/Mn=2-30, (G) a long chain branch frequency of 0.01-3 per 1,000 C atoms, and (H) a shrinking factor (g′ value) of 0.1-0.9 as measured by GPC/intrinsic-viscosity. The polyethylene composition can be finely divided particles having (P) a powder bulk density of 0.15-0.50 g/cm
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.
本发明提供了一种聚乙烯组合物,其是通过在存在大分子单体的情况下聚合乙烯和可选的具有≥3个碳原子的烯烃制备的。所述大分子单体是通过聚合乙烯和可选的具有≥3个碳原子的烯烃制备的,其具有(A) Mn≥5,000,且Mw/Mn=2-5的乙烯基端的聚合物。所述聚乙烯组合物包括(C)支化聚乙烯,其是通过共聚乙烯、大分子单体和可选的具有≥3个碳原子的烯烃制备的。所述聚乙烯组合物具有(D)密度为0.890-0.980 g/cm3,(E) Mw=30,000-10,000,000,(F) Mw/Mn=2-30,(G) 0.01-3个每1,000个C原子的长链支化频率,以及(H) 通过GPC/内禀粘度测量的收缩因子(g'值)为0.1-0.9。所述聚乙烯组合物可以是具有(P)粉末堆密度为0.15-0.50 g/cm3的细分散粒子。