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公开(公告)号：US06248831B1
公开(公告)日：2001-06-19
申请号：US09455234
申请日：1999-12-06
IPC分类号： C08F800
CPC分类号： C08F10/02 , C08F210/16 , C08L23/0815 , C08L2205/02 , C08F4/6555 , C08F4/6578 , C08F2/001 , C08L2666/04 , C08F210/14 , C08F2500/12 , C08F2500/07 , C08F2500/26 , C08F2500/24 , C08F2500/05
摘要： A process for production of a polyethylene blend in situ comprising contacting ethylene and at least one alpha-olefin with a magnesium/titanium based catalyst system including a partially activated precursor and a cocatalyst in each of two fluidized bed reactors connected in series, one of the provisos being that the precursor is formed by contacting an alkylaluminum halide with a solid reaction product prepared from a magnesium alkoxide, a titanium tetraalkoxide, and a solubility enhancing agent.
摘要翻译： 一种原位生产聚乙烯共混物的方法，包括使两个流化床反应器串联连接的乙烯和至少一种α-烯烃与包含部分活化的前体和助催化剂的镁/钛基催化剂体系接触， 条件是通过使烷基卤化铝与由烷氧基镁，四烷氧基钛和溶解度增强剂制备的固体反应产物接触而形成前体。
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公开(公告)号：US07790826B2
公开(公告)日：2010-09-07
申请号：US11121353
申请日：2005-05-03
IPC分类号： C08F110/02 , C08K3/34
CPC分类号： C08L23/06 , C08L23/0815 , C08L2205/02 , C08L2205/025 , C08L2666/06
摘要： The invention relates to formulated compositions which can be easily formed into bottle caps, without the need for a liner, while still maintaining pressure requirements, such as for carbonated beverages. The compositions may include an ethylene polymer having a density in the range of from about 0.947 to 0.962 g/cm3, a melt index of from about 1 to about 10 g/10 min., and another ethylene polymer having a density in the range of from about 0.912 to 0.932 g/cm3, a melt index of from about 0.25 to about 6 g/10 min., wherein the two ethylene polymers have a density difference of equal to or greater than 0.03 g/cm3. In other cases, the composition may include a single component resin with a density in the 0.935-0.955 g/cm3 range with a melt index in the range of 0.3-1.2 g/10 minutes, and wherein the resin comprises a polyethylene polymer.
摘要翻译： 本发明涉及配制的组合物，其可以容易地形成瓶盖，而不需要衬垫，同时仍然保持压力要求，例如用于碳酸饮料。 组合物可以包括密度在约0.947至0.962g / cm 3范围内的乙烯聚合物，熔体指数为约1至约10g / 10分钟，而另一种乙烯聚合物的密度范围为 约0.912至0.932g / cm 3，熔体指数为约0.25至约6g / 10min，其中两种乙烯聚合物具有等于或大于0.03g / cm 3的密度差。 在其它情况下，组合物可以包括密度在0.935-0.955g / cm 3范围内的单组分树脂，熔体指数在0.3-1.2g / 10分钟的范围内，并且其中树脂包含聚乙烯聚合物。
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公开(公告)号：US5925448A
公开(公告)日：1999-07-20
申请号：US675602
申请日：1996-07-03
IPC分类号： B29C47/00 , B29D7/01 , B29K23/00 , B29L7/00 , C08F8/00 , C08F210/16 , C08F297/08 , C08J5/18 , C08L23/00 , C08L23/06 , C08L23/08 , B32B7/02 , C08L23/04
CPC分类号： C08J5/18 , C08L23/0815 , C08J2323/08 , C08L2205/02 , C08L23/06
摘要： A film comprising a blend of (i) a linear low density polyethylene and (ii) an in situ blend of copolymers of ethylene and one or more alpha-olefins having 3 to 8 carbon atoms wherein (a) the weight ratio of component (i) to component (ii) is in the range of about 0.01:1 to about 6:1; (b) the blend has been extruded, under extrusion conditions, at a die rate in the range of about 6 to about 20 pounds per hour per inch of die circumference and at a die gap in the range of about 0.020 to about 0.075 inch; and (c) the film exhibits essentially no melt fracture.
摘要翻译： 一种膜，其包含（i）线性低密度聚乙烯和（ii）乙烯与一种或多种具有3-8个碳原子的α-烯烃的共聚物的原位共混物的共混物，其中（a）组分（i ）与组分（ii）的比例在约0.01:1至约6:1的范围内; （b）共混物已经在挤出条件下以约6至约20磅/小时/英寸模头周长的模具速率挤出，模具间隙在约0.020至约0.075英寸的范围内挤出; 和（c）膜基本上不显示熔体断裂。
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公开(公告)号：US06187866B1
公开(公告)日：2001-02-13
申请号：US09326083
申请日：1999-06-04
申请人： Robert James Jorgensen , Stephanie Marie Upham , James Daniel Madden , William James Michie, Jr.
发明人： Robert James Jorgensen , Stephanie Marie Upham , James Daniel Madden , William James Michie, Jr.
IPC分类号： C08F800
CPC分类号： C08F210/16 , C08F2/001
摘要： In a process for the in situ blending of polymers comprising contacting ethylene and one or more comonomers in two or more fluidized bed reactors with a catalyst system comprising (i) a magnesium/titanium based precursor containing an electron donor and (ii) a hydrocarbyl aluminum cocatalyst, the improvement comprising (A) increasing or decreasing the melt flow ratio and/or molecular weight of the blend by, respectively, decreasing or increasing the mole ratio of a precursor activator compound to the electron donor or (B) increasing or decreasing the bulk density of the blend by, respectively, increasing or decreasing the mole ratio of a precursor activator compound to the electron donor, both (A) and (B) subject to defined provisos including partial pre-activation of the precursor.
摘要翻译： 在一种用于原位共混聚合物的方法中，包括使两个或多个流化床反应器中的乙烯和一种或多种共聚单体与催化剂体系接触，所述催化剂体系包含（i）含有电子给体的基于镁/钛的前体和（ii）烃基铝 助催化剂，其改进包括（A）通过分别降低或增加前体活化剂化合物与电子给体的摩尔比来增加或降低共混物的熔体流动比和/或分子量，或（B）增加或减少 通过分别增加或降低前体活化剂化合物与电子给体的摩尔比（A）和（B），共混物的体积密度均受制于包括部分预活化前体的限定条件。
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