公开(公告)号：US6031027A

公开(公告)日：2000-02-29

申请号：US285167

申请日：1999-03-26

申请人： Arne Syre ,  Carl-Gustaf Ek ,  Aimo Sahila ,  Svein Eggen ,  Rune Nygaard ,  Ilka Vaara ,  Kristen Kjeldsen

发明人： Arne Syre ,  Carl-Gustaf Ek ,  Aimo Sahila ,  Svein Eggen ,  Rune Nygaard ,  Ilka Vaara ,  Kristen Kjeldsen

IPC分类号： B29C47/76 ,  B29C47/78

CPC分类号： B29C47/76 ,  B29C47/0009 ,  B29C47/822

摘要： A method of compounding a multimodal, preferably a bimodal polymer composition comprising a low molecular weight ethylene polymer and a high molecular weight ethylene polymer is described. The composition is compounded during a relatively long time at a low temperature which lies in a narrow temperature range including the melting point of the low molecular weight ethylene polymer. More particularly, the polymer composition is compounded, without addition of a beat transfer medium, in a temperature range from about 10.degree. C. below to about 10.degree. C. above the melting point of the low molecular weight ethylene polymer during a time of more than 10 seconds. The viscosity ratio between the ethylene polymers in said temperature range preferably is from about 5:1 to about 1:5.

摘要翻译： 描述了一种混合多峰，优选包含低分子量乙烯聚合物和高分子量乙烯聚合物的双峰聚合物组合物的方法。 该组合物在相当长的时间内在低温下复合，该低温位于包括低分子量乙烯聚合物的熔点的窄温度范围内。 更具体地说，聚合物组合物在不加入转印介质的情况下，在低分子量乙烯聚合物的熔点以下约10℃至约10℃的温度范围内，在更多的时间 超过10秒。 所述温度范围内的乙烯聚合物之间的粘度比优选为约5:1至约1:5。

公开(公告)号：US5194533A

公开(公告)日：1993-03-16

申请号：US689956

申请日：1991-04-23

申请人： Aimo Sahila ,  Hilkka Knuuttila ,  Bill Gustafsson

发明人： Aimo Sahila ,  Hilkka Knuuttila ,  Bill Gustafsson

IPC分类号： C07F11/00 ,  C08F4/60 ,  C08F10/00

CPC分类号： C07F11/005 ,  C08F10/00

摘要： The invention relates to a new bis(trialkylsilyl) chromate of the formula ##STR1## where n is approximately 1-2. Such a compound can be prepared by causing a corresponding silyl halide to react with silver chromate. The product is especially suitable for the polymerization and copolymerization of ethylene, the formed polymer having a high molar mass and a wide molar mass distribution.

公开(公告)号：US06645588B1

公开(公告)日：2003-11-11

申请号：US09624279

申请日：2000-07-24

申请人： Leif Leiden ,  Markku Asumalahti ,  Jari Aarila ,  Laila Rogestedt ,  Hans-Bertil Martinsson ,  Bengt Hagstrom ,  Aimo Sahila

发明人： Leif Leiden ,  Markku Asumalahti ,  Jari Aarila ,  Laila Rogestedt ,  Hans-Bertil Martinsson ,  Bengt Hagstrom ,  Aimo Sahila

IPC分类号： F16L9147

CPC分类号： H01B3/44 ,  C08F210/16 ,  C08L23/04 ,  C08L23/0815 ,  C08L2205/02 ,  G02B6/443 ,  Y10T428/1355 ,  Y10T428/1359 ,  C08F2/001 ,  C08L2666/04 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/05 ,  C08F2500/13 ,  C08F2500/07

摘要： Conventional coating compositions have the disadvantage of being insufficiently coatable and having an unsatisfactory environmental stress cracking resistance. Now a coating composition has been found which has both good coating processability and environmental stress cracking resistance. It comprises a multimodal ethylene polymer, which contains from 80 to 100% by weight of ethylene repeating units and from 0 to 20% by weight of C3-C10 &agr;-olefin repeating units, has a density of between 0.915 g/cm3 and 0.955 g/cm3, and is a blend of at least a first ethylene polymer having a first average molecular weight and a first molecular weight distribution and a second ethylene polymer having a second average molecular weight, which is higher than said first average molecular weight, and a second molecular weight distribution, said blend having a third average molecular weight and a third molecular weight distribution.

摘要翻译： 常规涂料组合物的缺点是可涂覆性不足，并且具有不令人满意的耐环境应力开裂性。 现在已经发现涂料组合物具有良好的涂覆加工性和耐环境应力开裂性。 其包含多峰乙烯聚合物，其含有80至100重量％的乙烯重复单元和0至20重量％的C 3 -C 10α-烯烃重复单元，其密度为0.915g / cm 3 和0.955g / cm 3，并且是至少具有第一平均分子量和第一分子量分布的第一乙烯聚合物和具有第二平均分子量的第二乙烯聚合物的共混物，其具有高于所述第一 平均分子量和第二分子量分布，所述共混物具有第三平均分子量和第三分子量分布。

公开(公告)号：US5684097A

公开(公告)日：1997-11-04

申请号：US475842

申请日：1995-06-07

申请人： Ari Palmroos ,  Ali Harlin ,  Antero Ahvenainen ,  Jouni Takakarhu ,  Aimo Sahila

发明人： Ari Palmroos ,  Ali Harlin ,  Antero Ahvenainen ,  Jouni Takakarhu ,  Aimo Sahila

IPC分类号： C08F2/14 ,  B01J8/24 ,  B01J19/24 ,  C08F2/06 ,  C08F2/34 ,  C08F10/02 ,  C08F210/16

CPC分类号： C08F10/02 ,  B01J19/2435 ,  B01J19/245 ,  B01J8/24 ,  B01J2219/00051 ,  B01J2219/00166 ,  B01J2219/00173 ,  C08F210/16

摘要： A process for producing polyethylene compositions in the presence of a catalytic system of ethylene polymerizing catalyst and cocatalyst in a multistage continuous reaction sequence consisting of successive liquid phase and gas phase polymerizations is disclosed. In the first step of the process, ethylene and optionally hydrogen and comonomer are polymerized in a first loop reactor in a low boiling hydrocarbon medium in the presence of ethylene polymerizing catalyst and cocatalyst. The reaction mixture is then removed and then transferred to a second loop reactor where polymerization is continued by addiing ethylene, hydrogen and optionally inert hydrocarbon, comonomers and cocatalysts. Thereafter, the reaction mixture is removed from the second loop reactor along with an essential part of the reaction medium and transferred to a gas phase reactor where polymerizing is continued in the presence of added ethylene and optionally hydrogen, comonomers and cocatalysts to form an end product. The residence time and reaction temperature being such that the proportion of the ethylene polymer produced in the first loop reactor to the end product of the process is between 1-20%.

摘要翻译： 在由连续液相和气相聚合组成的多级连续反应序列中，在乙烯聚合催化剂和助催化剂催化体系存在下生产聚乙烯组合物的方法。 在该方法的第一步中，在乙烯聚合催化剂和助催化剂存在下，乙烯和任选的氢和共聚单体在第一回路反应器中在低沸点烃介质中聚合。 然后除去反应混合物，然后转移到第二环管反应器中，其中通过加入乙烯，氢气和任选的惰性烃，共聚单体和助催化剂继续聚合。 此后，将反应混合物与反应介质的主要部分一起从第二环管反应器中除去，并转移到气相反应器中，在气相反应器中，在加入的乙烯和任选的氢，共聚单体和助催化剂的存在下，继续聚合以形成最终产物 。 停留时间和反应温度使得在第一回路反应器中产生的乙烯聚合物与该方法的最终产物的比例为1-20％。

公开(公告)号：US6090893A

公开(公告)日：2000-07-18

申请号：US875322

申请日：1997-06-16

申请人： Ali Harlin ,  Aimo Sahila ,  Veli Kilpelainen ,  Anders Nymark

发明人： Ali Harlin ,  Aimo Sahila ,  Veli Kilpelainen ,  Anders Nymark

IPC分类号： C08F10/02 ,  C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  C08L23/00 ,  C08F255/02

CPC分类号： C08F10/02 ,  C08L23/06 ,  C08L2205/02 ,  C08L2205/03 ,  C08L23/0815 ,  C08L2314/02

摘要： 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.

摘要翻译： 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。