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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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2.发明授权公开(公告)号：US06462149B1
公开(公告)日：2002-10-08
申请号：US09668232
申请日：2000-09-22
IPC分类号： C08F464
CPC分类号： C08F10/00 , C08F4/65916 , C08F4/65925 , C08F110/02 , C08F2400/02 , Y10S526/943 , C08F4/65904 , C08F2/00 , C08F4/6557 , C08F4/68 , C08F2500/05
摘要： Bimodal resin products are produced in a single reactor by using two bicomponent catalyst compositions, each having a high molecular weight and a low molecular weight component, in different ratios. The HMW/LMW split of the final resin product is controlled accurately by controlling the ratio of the feed of the two bicomponent catalyst compositions. Bimodal or polymodal effects are also achieved for properties or characteristics other than molecular weight. More complex results can be achieved with more than two components. The invention is applicable to a wide variety of polymer products, particularly polyolefins and polyethylene.
摘要翻译： 通过使用两种具有不同比例的高分子量和低分子量组分的双组分催化剂组合物，在单个反应器中制备双峰树脂产物。 通过控制两种双组分催化剂组合物的进料比例，精确控制最终树脂产品的HMW / LMW裂缝。 对于分子量以外的性质或特性，也可实现双峰或多模态效应。 可以通过两个以上的组件实现更复杂的结果。 本发明适用于各种聚合物产品，特别是聚烯烃和聚乙烯。
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