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19 条记录 (耗时 0.036 秒)

    Clear impact-resistant syndiotactic polypropylene
    1.
    发明授权
    Clear impact-resistant syndiotactic polypropylene 失效

    公开(公告)号：US06812286B2

    公开(公告)日：2004-11-02

    申请号：US10222552

    申请日：2002-08-15

    申请人： Joseph M. Schardl, Jr. ,  Likuo Sun ,  Al Baumgartner ,  Kevin Boyle ,  Greg Dekunder

    发明人： Joseph M. Schardl, Jr. ,  Likuo Sun ,  Al Baumgartner ,  Kevin Boyle ,  Greg Dekunder

    IPC分类号： C08F800

    CPC分类号： C08L23/12 ,  C08L23/0815 ,  C08L23/142 ,  C08L2205/03 ,  C08L2666/06

    摘要： Syndiotactic polypropylene blends having a unique set of mechanical properties may be prepared by blending syndiotactic polypropylene with an ultra low density polyethylene and, optionally, an isotactic polypropylene random copolymer. The syndiotactic polypropylene blends of the present invention have been found to have improved impact strength, reduced haze, increased light transmittance, and reduced flexural modulus. It has been determined that the addition of about 10 to about 50 wt % of an ultra low density polyethylene plastomer to a syndiotactic polypropylene can greatly enhance mechanical toughness, particularly at low temperatures, while maintaining good optical clarity. These results are made possible by using a sPP material with good optical clarity and dispersing the ULDPE plastomer uniformly throughout the sPP matrix to act as a sort of impact modifier. Moreover, the addition of about 10 to about 50 wt % of an iPP random copolymer to the sPP matrix phase provides comparable or improved mechanical properties while also resulting in a significant reduction in injection molding cycle times. The syndiotactic polypropylene blends according to the present invention may be further processed according to accepted practices to make cast films, blown films, co-extruded films, laminated sheets, injection molded parts, blow molded containers, and other articles using basic plastic fabrication techniques as known in the art.

    Sodium benzoate as a nucleating agent for monoaxially oriented polypropylene film
    2.
    发明授权
    Sodium benzoate as a nucleating agent for monoaxially oriented polypropylene film 失效
    苯甲酸钠作为单轴取向聚丙烯薄膜的成核剂

    公开(公告)号：US5912292A

    公开(公告)日：1999-06-15

    申请号：US34794

    申请日：1993-02-10

    申请人： Likuo Sun

    发明人： Likuo Sun

    IPC分类号： B29C55/06 ,  B29D7/01 ,  B29K23/00 ,  C08J5/18 ,  C08K5/09 ,  C08K5/098 ,  C08L23/12 ,  C08F110/06

    CPC分类号： C08J5/18 ,  C08K5/098 ,  C08J2323/12

    摘要： A mono-axially oriented polypropylene film with sodium benzoate as a nucleating agent results in reduced shrinkage and increase stretchability. The sodium benzoate ranges up to 1000 ppm. The polypropylene used in making the film preferably has an isotacticity exceeding 97% as determined by C.sup.13 -NMR spectroscopy. The film preferably has a thicknesses of about 0.5 mil to 5.0 mil and, more preferably, about 1.0 mil to 3.0 mil. The sodium benzoate preferably has a purity of 99% and a particle size of from about 1 micron to about 3 microns.

    摘要翻译： 具有苯甲酸钠作为成核剂的单轴取向聚丙烯膜导致收缩率降低并且增加拉伸性。 苯甲酸钠范围高达1000ppm。 用于制造薄膜的聚丙烯优选具有通过C 13-NMR光谱测定的全同立构规整度超过97％。 该膜优选具有约0.5密耳至5.0密耳的厚度，更优选约1.0密耳至3.0密耳。 苯甲酸钠优选具有99％的纯度和约1微米至约3微米的粒度。

    Methods of Making High Impact Polystyrene
    3.
    发明申请
    Methods of Making High Impact Polystyrene 有权
    制造高抗冲聚苯乙烯的方法

    公开(公告)号：US20120108747A1

    公开(公告)日：2012-05-03

    申请号：US13249383

    申请日：2011-09-30

    申请人： Likuo Sun ,  Jose M. Sosa ,  Serge Eon ,  Carlos Corleto ,  Scott Cooper

    发明人： Likuo Sun ,  Jose M. Sosa ,  Serge Eon ,  Carlos Corleto ,  Scott Cooper

    IPC分类号： C08F279/02 ,  C08F2/01

    CPC分类号： C08F2/001 ,  C08F212/08 ,  C08F279/02 ,  C08L9/06 ,  C08L2555/84

    摘要： A process for producing high impact polystyrene including feeding at least one vinyl aromatic monomer, an elastomer, and a free radical initiator to a first linear flow reactor to form a reaction mixture. Polymerizing the reaction mixture in the first linear flow reactor to a point below the point at which phase inversion occurs to produce a first polymerization mixture and feeding the first polymerization mixture from the first linear flow reactor to a second linear flow reactor. Polymerizing the reaction mixture in the second linear flow reactor to at least a phase inversion point of the mixture to produce a second polymerization mixture and feeding the second polymerization mixture from the second linear flow reactor to at least a third linear flow reactor for post-inversion polymerization of the second polymerization mixture. The product stream can have an ESCR value of at least 10% toughness retained with less than 10 wt % rubber content.

    摘要翻译： 一种生产高抗冲聚苯乙烯的方法，包括将至少一种乙烯基芳族单体，弹性体和自由基引发剂进料至第一线性流动反应器以形成反应混合物。 将第一线性流动反应器中的反应混合物聚合到低于发生相转移点的点以产生第一聚合混合物并将第一聚合混合物从第一线性流动反应器进料到第二线性流动反应器。 将第二线性流动反应器中的反应混合物聚合到混合物的至少相转变点，以产生第二聚合混合物，并将第二聚合混合物从第二线性流动反应器进料到至少第三线性流动反应器用于后反转 第二聚合混合物的聚合。 产品流的ESCR值可以保持至少10％的韧性，橡胶含量小于10wt％。

    Properties of polyolefin blends and their manufactured articles
    5.
    发明申请
    Properties of polyolefin blends and their manufactured articles 有权
    聚烯烃共混物及其制品的性能

    公开(公告)号：US20050027077A1

    公开(公告)日：2005-02-03

    申请号：US10628222

    申请日：2003-07-28

    申请人： Michael Musgrave ,  Likuo Sun ,  Mark Miller

    发明人： Michael Musgrave ,  Likuo Sun ,  Mark Miller

    IPC分类号： C08L23/08 ,  C08L23/12 ,  C08L23/16 ,  C08L23/00

    CPC分类号： C08L23/16 ,  C08L23/0815 ,  C08L23/12 ,  C08L2023/42 ,  C08L2207/12 ,  C08L2314/06 ,  C08L2666/06

    摘要： A polymer blend and a method of making the same are provided. The polymer blend includes an ethylene-propylene (C2-C3) random copolymer and a modifier selected from the group consisting of a metallocene-catalyzed polyethylene-based copolymer, a metallocene-catalyzed polyethylene-based terpolymer, and a syndiotactic polypropylene homopolymer. The polymer blend may also include an organic peroxide for visbreaking the polymer blend. An end use article is made from the foregoing polymer blend. The end use article may be, for example, a film, an injection molded article, a compression molded article, a thermoformed article, and a fiber. The end use article is desirably a film having an Elmendorf tear strength of at least about 300 g/ply in the machine and transverse directions.

    摘要翻译： 提供聚合物共混物及其制备方法。 聚合物共混物包括乙烯 - 丙烯（C 2 -C 3）无规共聚物和选自茂金属催化的聚乙烯基共聚物，茂金属催化的聚乙烯基三元共聚物和间同立构聚丙烯均聚物的改性剂。 聚合物共混物还可以包括用于减粘裂化聚合物共混物的有机过氧化物。 从上述聚合物共混物制成最终用途制品。 最终用途物品可以是例如膜，注射成型制品，压塑制品，热成型制品和纤维。 最终用途制品理想地是在机器和横向上具有至少约300g /层的埃尔曼多夫撕裂强度的膜。