Control of molecular weight and end-group functionality in polymers
    42.
    发明授权
    Control of molecular weight and end-group functionality in polymers 失效
    控制聚合物中的分子量和端基官能度

    公开(公告)号:US06235857B1

    公开(公告)日:2001-05-22

    申请号:US09066362

    申请日:1998-04-03

    IPC分类号: F23

    CPC分类号: C08F290/04 C08F2/38 C08F14/06

    摘要: This invention relates to a process for the production of lower molecular weight polymers by free radical-initiated polymerization of unsaturated species characterized by the use of an unsaturated compound of Formula I as a chain transfer agent: wherein R1 and R2 are the same or different and are selected from the group consisting of hydrogen, optionally substituted alkyl, optionally substituted saturated or aromatic carbocyclic or heterocyclic ring, and halogen; X is selected from the group consisting of chlorine, bromine, optionally substituted alkylsulfonyl, and optionally substituted arylsulfonyl, Y is selected from the group consisting of halogen, a polymer chain, and CR3R4Z, wherein R3 and R4 are the same or different and are selected from the group consisting of hydrogen, optionally substituted alkyl, optionally substituted saturated, unsaturated or aromatic carbocyclic or hetercyclic ring, and halogen; and Z is selected from the group consisting of chlorine, bromine, optionally substituted alkylsulfonyl and optionally substituted arylsulfonyl; provided that when X is optionally substituted alkylsulfonyl or optionally substituted arylsulfonyl, Y is not halogen. The invention also relates to various polymers produced by this process and products comprising these polymers. The process of the invention may also be used in the preparation of A-B type block copolymers.

    摘要翻译: 本发明涉及通过不饱和物质的自由基引发聚合生产低分子量聚合物的方法,其特征在于使用式I的不饱和化合物作为链转移剂:其中R1和R2相同或不同, 选自氢,任选取代的烷基,任选取代的饱和或芳族碳环或杂环,和卤素; X选自氯,溴,任选取代的烷基磺酰基和任选取代的芳基磺酰基,Y选自 由卤素,聚合物链和CR 3 R 4 Z组成的组,其中R 3和R 4相同或不同,并且选自氢,任选取代的烷基,任选取代的饱和,不饱和或芳族碳环或杂环,以及 卤素; 并且Z选自氯,溴,任选取代的烷基磺酰基和任选取代的芳基磺酰基;条件是当X是任选取代的烷基磺酰基或任选取代的芳基磺酰基时,Y不是卤素。本发明还涉及通过该方法生产的各种聚合物, 包含这些聚合物的产品。 本发明的方法也可用于制备A-B型嵌段共聚物。

    Starch Nanocomposite Materials
    46.
    发明申请
    Starch Nanocomposite Materials 有权
    淀粉纳米复合材料

    公开(公告)号:US20100307951A1

    公开(公告)日:2010-12-09

    申请号:US12602257

    申请日:2008-06-02

    IPC分类号: B65D65/38 C08K3/34

    摘要: In one aspect, the invention provides a substantially exfoliated nanocomposite material including starch and hydrophobically modified layered silicate clay. In another aspect, the invention provides packaging made from material including the substantially exfoliated nanocomposite material described above. The nanocomposite material has improved mechanical and rheological properties and reduced sensitivity to moisture in that the rates of moisture update and/or loss are reduced. In another aspect, the invention provides a process for preparing the substantially exfoliated nanocomposite material described above, including a step of mixing the starch in the form of an aqueous gel with the hydrophobic clay in a melt mixing device. In a further aspect, the invention provides a process for preparing the substantially exfoliated nanocomposite material, including the steps of mixing the starch with the hydrophobic clay to form a masterbatch (hereinafter “the masterbatch process”) and mixing the masterbatch with further starch.

    摘要翻译: 一方面,本发明提供了包括淀粉和疏水改性的层状硅酸盐粘土的基本上剥离的纳米复合材料。 另一方面,本发明提供由包括上述基本上剥离的纳米复合材料的材料制成的包装。 纳米复合材料具有改善的机械和流变性能并降低对水分的敏感性,因为减少了水分更新和/或损失的速率。 另一方面,本发明提供了一种制备上述基本上剥离的纳米复合材料的方法,包括在熔融混合装置中将水性凝胶形式的淀粉与疏水性粘土混合的步骤。 在另一方面,本发明提供了制备基本上脱落的纳米复合材料的方法,包括将淀粉与疏水性粘土混合以形成母料(以下称为“母料工艺”)并将母料与另外的淀粉混合的步骤。

    Polyester masterbatch composition
    50.
    发明申请
    Polyester masterbatch composition 审中-公开
    聚酯母粒组成

    公开(公告)号:US20060293416A1

    公开(公告)日:2006-12-28

    申请号:US10557228

    申请日:2004-05-10

    IPC分类号: C08J3/22 C08K5/53

    摘要: The present invention relates to masterbatches useful for modifying thermoplastic polyesters, in particular to masterbatches comprising dispersed polyol branching agent and/or chain coupling agents, such as for example dianhydrides. The invention also relates to a method for preparing the masterbatches, and to a method for modifying a polyester utilizing the masterbatches. Yet another aspect of the invention is the use of such a masterbatch composition for the modification of polyesters.

    摘要翻译: 本发明涉及可用于改性热塑性聚酯的母料,特别是涉及包含分散的多元醇支化剂和/或链偶联剂(例如二酸酐)的母料。 本发明还涉及一种制备母料的方法,以及一种利用母料改性聚酯的方法。 本发明的另一方面是使用这种母料组合物来改性聚酯。