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公开(公告)号：US5194529A
公开(公告)日：1993-03-16
申请号：US783733
申请日：1991-10-28
CPC分类号： C08F10/00
摘要： An improved process for making changes in polymer product type in an ongoing olefin polymerization process without undue disruption of the ongoing polymerization process comprises adding to the polymerization reactor a hydrogenation catalyst and sufficient molecular hydrogen to hydrogenate the unreacted olefin monomer, subsequently removing hydrogenated product and hydrogenation catalyst while resuming polymerization to produce polymer product of changed type upon addition to the reactor of olefin feed appropriate for production of such polymer product of changed type.
摘要翻译： 在持续的烯烃聚合方法中改进聚合物产物类型的改进方法，而不会不适当地破坏正在进行的聚合方法，包括向聚合反应器中加入氢化催化剂和足够的分子氢氢化未反应的烯烃单体，随后除去氢化产物和氢化 催化剂，同时在加入适于生产这种改变型聚合物产物的烯烃原料反应器时，产生改变型聚合物产物。
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2.发明授权Process for reducing polymer build-up in polymerization equipment during polymerization of alpha-olefins 失效在α-烯烃聚合过程中减少聚合设备中聚合物积聚的方法
公开(公告)号：US4956427A
公开(公告)日：1990-09-11
申请号：US289266
申请日：1988-12-23
摘要： A method for the prevention of fouling of metallic surfaces exposed to reactive alpha-olefin gases during the production of polymeric resins which comprise coating such metallic surfaces with an amino silicone fluid and thereafter curing said coating by hydrolysis to form a continuous solid coating.
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公开(公告)号：US5587434A
公开(公告)日：1996-12-24
申请号：US542719
申请日：1995-10-13
CPC分类号： C08F8/00 , C08F2810/20
摘要： A process for reacting molten polyolefin with a free radical generator wherein the molten polyolefin passes through an extruder and free radical generator is mixed with the molten polyolefin in increments along the extruder such that any previously added free radical generator is decomposed before the next increment of free radical generator is added to the molten polyolefin. Products of the process demonstrate improved efficiency of free radical generator utilization as measured by enhanced melt flow rates relative to the total amount of free radical generator used.
摘要翻译： 使熔融聚烯烃与自由基发生剂反应的方法，其中熔融聚烯烃通过挤出机和自由基发生剂与熔融聚烯烃一起沿着挤出机增量混合，使得任何先前添加的自由基发生剂在下一次增量释放之前分解 将自由基发生剂加入到熔融聚烯烃中。 该方法的产物显示出通过相对于所用自由基发生器总量的增加的熔体流动速率测量的，提高了自由基发生器利用效率。
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公开(公告)号：USH1120H
公开(公告)日：1992-12-01
申请号：US785720
申请日：1991-10-31
IPC分类号： C08J11/06 , C08L23/20 , C08L101/00
CPC分类号： C08L23/20 , C08J11/06 , C08L101/00 , Y02W30/701 , C08L2666/02 , C08L2666/06
摘要： A method for processing of recyclable polymeric materials comprising the addition of a relatively lower shear viscosity polybutylene and optionally at least one filler to these recyclable materials prior to or during processing. Products produced by this process have and exhibit improved performance properties.
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5.发明授权
公开(公告)号：US5594074A
公开(公告)日：1997-01-14
申请号：US395365
申请日：1995-02-21
CPC分类号： C08L23/06 , B29B9/06 , B29C67/246 , C08F8/50 , C08K5/14 , B29K2023/00 , C08F2800/20 , C08F2810/10
摘要： A process for making polymer pellets comprising unreacted free radical generator which can be degraded upon thermal treatment to form an ultra low melt viscosity polyolefin, which process comprises the steps of adding polyolefin and free radical generator required for the degradation in the extruder to the first half section of an extruder and injecting, optionally through a side-arm extruder, another portion of free radical generator near the exit of the extruder to provide a sufficient amount of unreacted free radical generator in the pellets produced, and followed by pelletizing the resulting molten mixture to form uniform non-sticky pellets.
摘要翻译： 一种制备聚合物颗粒的方法，其包含未反应的自由基发生剂，其可在热处理后降解以形成超低熔点粘度聚烯烃，该方法包括以下步骤：将挤出机中降解所需的聚烯烃和自由基发生剂加入上半部分 挤出机的截面，并且任选地通过侧臂挤出机注入在挤出机出口附近的另一部分自由基产生剂，以在所生产的颗粒中提供足量的未反应的自由基发生剂，随后将所得的熔融混合物 以形成均匀的非粘性颗粒。
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公开(公告)号：US5362782A
公开(公告)日：1994-11-08
申请号：US74264
申请日：1993-06-09
IPC分类号： C08F297/08 , C08L23/12 , C08L23/16 , C08K5/15
CPC分类号： C08L23/12 , C08F297/083 , C08L23/16 , C08L2023/42 , C08L2308/00
摘要： Polypropylene impact copolymer compositions containing a nucleating agent demonstrate not only good low temperature properties, including impact strength, but also resistance to stress whitening when the numerical ratio of the intrinsic viscosity of the copolymer rubber phase to the intrinsic viscosity of the homopolymer phase is near unity and ethylene contents of the copolymer phase are in the range of 38% to 60% by weight. The impact copolymer compositions are useful in the production of molded and extruded articles, shaped containers, and films having good clarity.
摘要翻译： 含有成核剂的聚丙烯抗冲共聚物组合物不仅表现出包括冲击强度在内的良好的低温性能，而且当共聚物橡胶相的特性粘度与均聚物相的特性粘度的数值比接近1时，表现出耐应力增白的能力 共聚物相的乙烯含量为38〜60重量％。 抗冲击共聚物组合物可用于生产模制和挤出制品，成型容器和具有良好透明度的薄膜。
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公开(公告)号：US5258464A
公开(公告)日：1993-11-02
申请号：US821676
申请日：1992-01-16
CPC分类号： C08L23/12 , C08F8/50 , C08F2810/10 , C08L2023/42 , C08L23/16
摘要： Polypropylene impact copolymer compositions demonstrate not only good low temperature properties, including impact strength, but also resistance to stress whitening when the numerical ratio of the intrinsic viscosity of the copolymer phase to the intrinsic viscosity of the homopolymer phase is near unity and ethylene contents of the copolymer phase are in the range of 38% to 60% by weight. The impact copolymer compositions are useful in the production of molded and extruded articles, shaped containers, and films having good clarity.
摘要翻译： 聚丙烯抗冲共聚物组合物不仅表现出良好的低温性能，包括冲击强度，而且当共聚物相的特性粘度与均聚物相的特性粘度的数值比接近一致时，表现出耐应力增白的能力，乙烯含量 共聚物相的含量为38〜60重量％。 抗冲击共聚物组合物可用于生产模制和挤出制品，成型容器和具有良好透明度的薄膜。
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公开(公告)号：US5250631A
公开(公告)日：1993-10-05
申请号：US769263
申请日：1991-10-01
IPC分类号： C08F297/08 , C08L23/08 , C08L23/12 , C08L23/14 , C08L23/16 , C08L23/10 , C08L23/18 , C08L23/26
CPC分类号： C08L23/12 , C08F297/083 , C08L23/142 , C08L2023/42 , C08L2205/02 , C08L23/0815 , C08L23/16
摘要： Polypropylene impact copolymer compositions and visbroken derivatives thereof demonstrate a good balance of low temperature properties and resistance to stress whitening when the homopolymer phase is at least predominantly homopolymeric polypropylene and the rubber phase comprises a major proportion of ethylene with a minor proportion of .alpha.-olefin of at least 4 carbon atoms and a minor proportion of propylene.
摘要翻译： 聚丙烯冲击共聚物组合物和其减粘裂解衍生物在均聚物相至少主要是均聚聚丙烯时表现出低温性能和耐应力增白的良好平衡，并且橡胶相包含主要比例的乙烯和少量α-烯烃 至少4个碳原子和少量的丙烯。
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公开(公告)号：US5118757A
公开(公告)日：1992-06-02
申请号：US498886
申请日：1990-03-26
IPC分类号： C08F2/00 , C08F2/34 , C08F2/44 , C08F10/00 , C08F210/00 , C08F210/06
CPC分类号： C08F210/00 , C08F210/06
摘要： In the gas phase, two stage process for the production of polypropylene impact copolymer, the fouling of the second stage recycle loop and the heat exchange unit incorporated therein is reduced by the addition to the substantially gaseous material passing through the loop of a small amount of alkylene compound selected from alkylene glycol compounds, alkylene glycol derivatives of alkylene diamines or ethers or esters thereof.
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