Modifying tubular LDPE with free radical initiator
    21.
    发明申请
    Modifying tubular LDPE with free radical initiator 有权
    用自由基引发剂改性管状LDPE

    公开(公告)号:US20100076160A1

    公开(公告)日:2010-03-25

    申请号:US12284486

    申请日:2008-09-23

    IPC分类号: C08L23/30 C08L23/26

    摘要: A method of modifying a tubular low density polyethylene (LDPE) is disclosed. In the method ethylene is polymerized with a free radical initiator in a high pressure reactor to form an LDPE. The LDPE is then reacted with a free radical initiator to produce a modified polyethylene. The modified polymer has an increased long chain branching index as indicated by the increase in the gel permeation chromatography branching index.

    摘要翻译: 公开了改性管状低密度聚乙烯(LDPE)的方法。 在该方法中,乙烯在高压反应器中与自由基引发剂聚合以形成LDPE。 然后将LDPE与自由基引发剂反应以制备改性聚乙烯。 改进的聚合物具有增加的长链支化指数,如凝胶渗透色谱分支指数的增加所示。

    Method of producing polyethylene resins for use in blow molding
    26.
    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

    IPC分类号: C08F800

    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。

    Flexible polypropylene resin
    27.
    发明申请
    Flexible polypropylene resin 失效
    柔性聚丙烯树脂

    公开(公告)号:US20030055137A1

    公开(公告)日:2003-03-20

    申请号:US10148879

    申请日:2002-06-12

    IPC分类号: C08K005/49

    摘要: The present invention relates to a soft polypropylene resin having a melt index falling in a specific range, prepared by melting and kneading a substantial propylene homopolymer or a propylene copolymer composition each having specific properties in the presence of a radical-generating agent. According to the present invention, capable of being provided at a good productivity is a soft polypropylene resin which is useful as an alternative for a polyvinyl chloride resin in the fields of films, sheets, construction materials and the like and which is excellent in fluidity.

    摘要翻译: 本发明涉及熔融指数在特定范围内的软质聚丙烯树脂,其通过在存在自由基产生剂的情况下熔融和捏合各自具有特定性能的丙烯均聚物或丙烯共聚物组合物而制备。 根据本发明,能够以良好的生产率提供的是一种软聚丙烯树脂,其可用作薄膜,片材,建筑材料等领域的聚氯乙烯树脂的替代物,并且流动性优异。

    Decomposing polymers using NOR-HALS compounds
    28.
    发明授权
    Decomposing polymers using NOR-HALS compounds 有权
    使用NOR-HALS化合物分解聚合物

    公开(公告)号:US6133414A

    公开(公告)日:2000-10-17

    申请号:US202357

    申请日:1998-12-14

    摘要: A method is described for the decomposition of polymers, especially waste plastics and used plastics, in which so-called NOR--HALS compounds--that is, for example, compounds comprising the group ##STR1## in which R* is C.sub.1 -C.sub.20 alkyl, OH-substituted C.sub.1 -C.sub.20 alkyl, optionally C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl or O- or S-interrupted C.sub.2 -C.sub.20 alkyl--are added and heating is carried out at temperatures which lie above the customary processing temperatures for polymers (280.degree. C. or more).

    摘要翻译: PCT No.PCT / EP97 / 03133 Sec。 371 1998年12月14日第 102(e)1998年12月14日PCT PCT 1997年6月17日PCT公布。 出版物WO97 / 49737 日期1997年12月31日描述了用于分解聚合物,特别是废塑料和废塑料的方法,其中所谓的NOR-HALS化合物 - 例如包括其中R *是C 1 -C 20烷基的基团的化合物 ,OH取代的C 1 -C 20烷基,任选地C 1 -C 4烷基取代的C 5 -C 12环烷基或O-或S-间断的C 2 -C 20烷基 - 并且在高于常规加工温度的聚合物的温度下进行加热(280℃ 。 或者更多)。