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    Process for the production of polyethylene resin
    4.
    发明申请
    Process for the production of polyethylene resin 审中-公开
    聚乙烯树脂生产工艺

    公开(公告)号：US20090182100A1

    公开(公告)日：2009-07-16

    申请号：US12008740

    申请日：2008-01-14

    申请人： Gerhard K. Guenther ,  Steven D. Gray ,  Tim J. Coffy

    发明人： Gerhard K. Guenther ,  Steven D. Gray ,  Tim J. Coffy

    IPC分类号： C08F2/01

    CPC分类号： C08F210/16 ,  C08F110/02 ,  C08F2/001 ,  C08F2/00 ,  C08F2500/02 ,  C08F210/14 ,  C08F2500/01

    摘要： Process for the polymerization of ethylene to produce a polymer of enhanced long chain branching. Ethylene and hydrogen are introduced into a first reaction zone to produce an ethylene polymer having a first molecular weight distribution. The polymer from the first reaction zone is applied to a second reaction zone along with ethylene and a C3-C8 alpha-olefin monomer. The second reaction zone is operated to produce a copolymer having a second molecular weight distribution different from the first molecular weight distribution. A polymer fluff of bimodal molecular weight distribution is recovered from the second reaction zone and heated to melt the fluff and then extruded. Concomitantly with the heating and or extrusion, the polymer fluff is treated in order to enhance the long chain branching and reduce the melt index MI5 of the polymer product.

    摘要翻译： 乙烯聚合制备增强长链支化聚合物的方法。 将乙烯和氢气引入第一反应区以产生具有第一分子量分布的乙烯聚合物。 来自第一反应区的聚合物与乙烯和C 3 -C 8α-烯烃单体一起施加到第二反应区。 操作第二反应区以产生具有不同于第一分子量分布的第二分子量分布的共聚物。 从第二反应区回收双峰分子量分布的聚合物绒毛，并加热熔化绒毛然后挤出。 伴随着加热和/或挤出，处理聚合物绒毛以增强长链支化并降低聚合物产物的熔体指数MI5。

    Method of producing polyethylene resins for use in blow molding
    5.
    发明授权
    Method of producing polyethylene resins for use in blow molding 有权
    生产用于吹塑成型的聚乙烯树脂的方法

    公开(公告)号：US06433103B1

    公开(公告)日：2002-08-13

    申请号：US09775396

    申请日：2001-01-31

    申请人： Gerhard K. Guenther ,  Lea Ann Nairn ,  Curt D. Clark ,  Ben W. Hicks ,  Ronald A. Tharappel ,  Tim J. Coffy

    发明人： Gerhard K. Guenther ,  Lea Ann Nairn ,  Curt D. Clark ,  Ben W. Hicks ,  Ronald A. Tharappel ,  Tim J. Coffy

    IPC分类号： C08F800

    CPC分类号： B29C47/92 ,  B29C47/0004 ,  B29C47/0023 ,  B29C47/0054 ,  B29C2947/92695 ,  C08F8/50 ,  C08F2810/10 ,  C08F110/02

    摘要： A method of processing polyethylene for use as an extruded blow molding resin to improve the properties and processability thereof is accomplished by modifying a polyethylene resin having a molecular weight distribution (Mw/Mn) of less than about 10. The modification is carried out by the addition of a free radical initiator to the resin during extrusion of the resin to increase the rheological breadth of the polyethylene from about 10% to about 60% compared to unmodified polyethylene resin extruded under similar conditions. In another aspect of the invention, a polyethylene resin having higher melt index is processed to provide a desired final melt index by the addition of a free radical initiator where it would otherwise be necessary to utilize a resin having lower melt flow, and which is more difficult to process. Improvements in color can also be obtained.

    摘要翻译： 通过改性分子量分布（Mw / Mn）小于约10的聚乙烯树脂，可以实现加工用于挤出吹塑树脂以提高其性能和加工性能的聚乙烯的方法。该改性通过 与在类似条件下挤出的未改性聚乙烯树脂相比，在树脂挤出期间向树脂中加入自由基引发剂以将聚乙烯的流变宽度从约10％增加至约60％。 在本发明的另一方面，通过加入自由基引发剂处理具有较高熔体指数的聚乙烯树脂以提供所需的最终熔体指数，否则将需要使用具有较低熔体流动性的树脂，并且其更多 难以处理 也可以获得颜色的改善。

    Polyethylene films for barrier applications
    7.
    发明授权
    Polyethylene films for barrier applications 失效
    用于屏障应用的聚乙烯膜

    公开(公告)号：US06984698B2

    公开(公告)日：2006-01-10

    申请号：US10685853

    申请日：2003-10-15

    申请人： Michael A. McLeod ,  Gerhard K. Guenther

    发明人： Michael A. McLeod ,  Gerhard K. Guenther

    IPC分类号： C08F8/00

    CPC分类号： C08L23/06 ,  C08F8/00 ,  C08F2810/10 ,  C08F2810/20 ,  C08J5/18 ,  C08J2323/06 ,  C08J2323/26 ,  C08L2023/40 ,  C08L2203/16 ,  C08F110/02

    摘要： Disclosed is a method of modifying polyethylene to increase its ability to resist the transmission of water vapor. The polyethylene is modified to increase long chain branching resulting in lower water vapor transmission rates in films prepared with the modified polyethylene. The polyethylene can be modified using peroxides, air and even by admixture with high long chain branching content polyethylene. The polyethylene, particularly when in the form of films, can be used for preparing packaging where sorption of flavor, aroma, or colorant compounds must be minimized.

    摘要翻译： 公开了一种改性聚乙烯以提高其抵抗水蒸气透过的能力的方法。 聚乙烯被改性以增加长链支化，导致用改性聚乙烯制备的膜中的较低的水蒸气透过率。 聚乙烯可以使用过氧化物，空气以及甚至通过与高长支链含量聚乙烯的混合来改性。 聚乙烯，特别是当以薄膜形式时，可以用于制备包装，其中香料，芳香剂或着色剂化合物的吸附必须最小化。

    Polyolefin composition having reduced color bodies
    8.
    发明授权
    Polyolefin composition having reduced color bodies 失效
    聚烯烃组合物具有降低的着色体

    公开(公告)号：US06846859B2

    公开(公告)日：2005-01-25

    申请号：US10160462

    申请日：2002-05-31

    申请人： Tim J. Coffy ,  Steven D. Gray ,  Gerhard K. Guenther

    发明人： Tim J. Coffy ,  Steven D. Gray ,  Gerhard K. Guenther

    IPC分类号： C08K5/134 ,  C08K5/526 ,  C08L5/52

    CPC分类号： C08K5/1345 ,  C08K5/526 ,  C08K2201/014 ,  C08L23/02

    摘要： The present invention includes a polyolefin composition having reduced coloration with aging. The polyolefin composition comprises at least one polyolefin, an effective amount of a primary phenolic antioxidant to promote long term thermal stability of the polymer composition, and an effective amount of a phosphite processing stabilizer to promote thermal stability of the polymer composition during melt processing. The polymer composition further comprises an effective amount of a sacrificial phosphite antioxidant to reduce the yellowness index of the polymer composition. The sacrificial phosphite antioxidant and the phosphite processing stabilizer are not the same compound.

    摘要翻译： 本发明包括随着老化而着色度降低的聚烯烃组合物。 聚烯烃组合物包含至少一种聚烯烃，有效量的初级酚类抗氧化剂以促进聚合物组合物的长期热稳定性，以及有效量的亚磷酸酯加工稳定剂，以促进熔融加工期间聚合物组合物的热稳定性。 聚合物组合物还包含有效量的牺牲亚磷酸酯抗氧化剂以降低聚合物组合物的黄度指数。 牺牲亚磷酸酯抗氧化剂和亚磷酸酯加工稳定剂是不同的化合物。

    Method of producing polyethylene resins for use in blow molding
    9.
    发明授权
    Method of producing polyethylene resins for use in blow molding 失效
    生产用于吹塑成型的聚乙烯树脂的方法

    公开(公告)号：US06706822B2

    公开(公告)日：2004-03-16

    申请号：US10170753

    申请日：2002-06-13

    申请人： Gerhard K. Guenther ,  Lea Ann Nairn ,  Curt D. Clark ,  Ben W. Hicks ,  Ronald A. Tharappel ,  Tim J. Coffy

    发明人： Gerhard K. Guenther ,  Lea Ann Nairn ,  Curt D. Clark ,  Ben W. Hicks ,  Ronald A. Tharappel ,  Tim J. Coffy

    IPC分类号： C08F800

    CPC分类号： B29C47/92 ,  B29C47/0004 ,  B29C47/0023 ,  B29C47/0054 ,  B29C2947/92695 ,  C08F8/50 ,  C08F2810/10 ,  C08F110/02

    摘要： A method of processing polyethylene for use as an extruded blow molding resin to improve the properties and processability thereof is accomplished by modifying a polyethylene resin having a molecular weight distribution (Mw/Mn) of less than about 10. The modification is carried out by the addition of a free radical initiator to the resin during extrusion of the resin to increase the rheological breadth of the polyethylene from about 10% to about 60% compared to unmodified polyethylene resin extruded under similar conditions. In another aspect of the invention, a polyethylene resin having higher melt index is processed to provide a desired final melt index by the addition of a free radical initiator where it would otherwise be necessary to utilize a resin having lower melt flow, and which is more difficult to process. Improvements in color can also be obtained.

    摘要翻译： 通过改性分子量分布（Mw / Mn）小于约10的聚乙烯树脂，可以实现加工用于挤出吹塑树脂以提高其性能和加工性能的聚乙烯的方法。该改性通过 与在类似条件下挤出的未改性聚乙烯树脂相比，在树脂挤出期间向树脂中加入自由基引发剂以将聚乙烯的流变宽度从约10％增加至约60％。 在本发明的另一方面，通过加入自由基引发剂处理具有较高熔体指数的聚乙烯树脂以提供所需的最终熔体指数，否则将需要使用具有较低熔体流动性的树脂，并且其更多 难以处理 也可以获得颜色的改善。