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    • 37. 发明授权
    • Polyethylene composition
    • 聚乙烯组成
    • US6090893A
    • 2000-07-18
    • US875322
    • 1997-06-16
    • Ali HarlinAimo SahilaVeli KilpelainenAnders Nymark
    • Ali HarlinAimo SahilaVeli KilpelainenAnders Nymark
    • C08F10/02C08L23/04C08L23/06C08L23/08C08L23/00C08F255/02
    • C08F10/02C08L23/06C08L2205/02C08L2205/03C08L23/0815C08L2314/02
    • The invention relates to polyethylene compositions containing 85-99.5 weight % of component A, which is a linear (co)polymer of ethylene having a bimodal weight distribution, and 0.5-15 weight % of component B having a unimodal molecular weight distribution. Component A is 40-60% by weight of a low molecular weight component (A1) having a weight average molecular weight between 5,000 and 50,000 g/mol, and a molecular weight distribution Mw/Mn between 2.5 and 9 and 60-40% by weight of a high molecular weight component (A2) having a weight average molecular weight between 300,000 and 900,000 g/mol, and a molecular weight distribution M/w/Mn between 4.5 and 12. Component B is a linear ethylene polymer having a molecular weight between 150,000-600,O00 g/mol and an average molecular weight which is higher than the average molecular weight of component (A1) but lower than the average molecular weight of component (A2) and a density controlled within the range of 910-960 kg/m.sup.3. Component B is produced separately from component A by using Ziegler-Natta or metallocene catalysts.
    • PCT No.PCT / FI95 / 00669 Sec。 371日期:1997年6月16日 102(e)日期1997年6月16日PCT提交1995年12月8日PCT公布。 公开号WO96 / 18677 日期1996年6月20日本发明涉及含有85-99.5重量%组分A的聚乙烯组合物,组分A是具有双峰重量分布的乙烯的线性(共)聚合物,和0.5-15重量%的具有单峰分子 体重分布。 组分A为重均分子量为5,000〜50,000g / mol,分子量分布Mw / Mn为2.5〜9,分子量分布为60〜40%的低分子量成分(A1)为40〜60重量% 重量平均分子量为300,000〜900,000g / mol,分子量分布M / w / Mn为4.5〜12的高分子量组分(A2)的重量。组分B为具有分子量的直链乙烯聚合物 150,000-600,O00g / mol,平均分子量高于组分(A1)的平均分子量但低于组分(A2)的平均分子量,并且密度控制在910-960的范围内 kg / m3。 组分B通过使用齐格勒 - 纳塔或茂金属催化剂与组分A分开制备。
    • 38. 发明授权
    • Process for manufacturing olefin polymers and products prepared by the
process
    • 通过该方法制备烯烃聚合物和产品的方法
    • US5494965A
    • 1996-02-27
    • US217510
    • 1994-03-24
    • Ali HarlinUlf Palmqvist
    • Ali HarlinUlf Palmqvist
    • C08F10/00C08L23/02C08L23/04C08L23/10C08L23/18
    • C08F10/00C08L23/02C08L23/04C08L23/06
    • A process for manufacturing bimodal olefin polymers and copolymers having a ratio between low molecular weight fractions within the range of 40:60-70:30, by mixing under shear conditions 5-50 percent by weight of a low molecular weight unimodal polyolefin having a molecular weight (Mw) between 15,000-30,000, and 95-50 percent by weight of a bimodal polyolefin having a ratio between low molecular weight fractions and high molecular weight fractions within the range of 30:70-55:45. According to a preferred embodiment, there is used a multi-phase process including a loop reactor followed by a gas-phase reactor, wherein a part of the product coming out from the loop reactor is separated and combined with the bimodal product coming out from the gas-phase reactor.
    • 通过在剪切条件下混合5-50重量%的具有分子量的低分子量单峰聚烯烃的制备双峰烯烃聚合物和共聚物的方法,其具有在40:60-70:30的范围内的低分子量分数之间的比例 重量(Mw)为15,000-30,000和95-50重量%的在30:70-55:45范围内的低分子量级分与高分子量级分之间的比例的双峰聚烯烃。 根据优选实施方案,使用多相方法,其包括循环反应器,随后是气相反应器,其中从环管反应器出来的一部分产物被分离并与从该反应器出来的双峰产物组合 气相反应器。