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    THERMOPLASTIC POLYURETHANE WITH REDUCED TENDENCY TO BLOOM
    5.
    发明授权
    THERMOPLASTIC POLYURETHANE WITH REDUCED TENDENCY TO BLOOM 有权
    热塑性聚氨酯具有降低倾向的趋势

    公开(公告)号：EP2408831B1

    公开(公告)日：2017-05-10

    申请号：EP10705766.3

    申请日：2010-02-25

    申请人： Lubrizol Advanced Materials, Inc.

    发明人： FARKAS, Julius ,  JACOBS, Charles P.

    IPC分类号： B29L23/00 ,  B29C45/72 ,  B29L7/00 ,  B29C47/00 ,  B29K75/00 ,  C08G18/66 ,  C08G18/76 ,  C08G18/42 ,  B29C45/00

    CPC分类号： B29C45/0001 ,  B29C45/7207 ,  B29C48/022 ,  B29C48/04 ,  B29C48/08 ,  B29C48/09 ,  B29C48/10 ,  B29C48/78 ,  B29C48/91 ,  B29K2075/00 ,  B29K2995/0026 ,  B29K2995/0088 ,  B29L2007/00 ,  B29L2023/00 ,  C08G18/4238 ,  C08G18/664 ,  C08G18/7671 ,  C08G2410/00 ,  Y10T428/139

    摘要： A process of making a thermoplastic polyurethane by the reaction of (1) a hydroxyl terminated polyester intermediate, wherein the hydroxyl terminated polyester intermediate is comprised of repeat units that are derived from adipic acid and a glycol component comprising 1,3-propylene glycol, and said hydroxyl terminated intermediate has a number average molecular weight which is within the range of 500 to 10,000 Daltons, (2) a diisocyanate; and (3) a glycol chain extender. This thermoplastic polyurethane by this process is unique in that it has a greatly reduced tendency to bloom. This is highly desirable in applications where high clarity is desired because blooming causes articles containing the thermoplastic polyurethane to be hazy or foggy in appearance. Blooming can also reduce the ability of an article made with the thermoplastic polyurethane to be securely bound to another article with an adhesive.

    摘要翻译： 本发明公开了由（1）羟基封端的聚酯中间体，（2）聚异氰酸酯和（3）乙二醇增链剂的反应产物组成的热塑性聚氨酯; 其中羟基封端的聚酯中间体由衍生自1,3-丙二醇和二羧酸的重复单元组成; 其中所述羟基封端的聚酯中间体具有500至10,000的数均分子量; 并且其中所述热塑性聚氨酯包括作为所述聚异氰酸酯和所述乙二醇增链剂的反应产物的硬链段。 这种热塑性聚氨酯的独特之处在于其大大降低了开花倾向。 在需要高透明度的应用中，这是非常理想的，因为起霜使包含热塑性聚氨酯的制品在外观上模糊或雾化。 开花还可以降低用热塑性聚氨酯制成的制品用粘合剂牢固地粘合到另一制品上的能力。

    MODIFIED POLYLACTIC ACID FIBERS
    10.
    发明公开
    MODIFIED POLYLACTIC ACID FIBERS 审中-公开
    改性聚酯树脂

    公开(公告)号：EP2603624A4

    公开(公告)日：2014-01-08

    申请号：EP11816160

    申请日：2011-07-06

    申请人： KIMBERLY CLARK CO

    发明人： TOPOLKARAEV VASILY A ,  MCENEANY RYAN J ,  EBY TOM ,  LARK TYLER J

    IPC分类号： D01F6/92 ,  C08L67/04 ,  D01D5/08 ,  D01D5/38 ,  D01F1/10 ,  D01F6/62 ,  D04H1/42

    CPC分类号： D01F6/625 ,  B29C47/04 ,  B29K2063/00 ,  B29K2067/046 ,  B29K2105/0005 ,  B29K2995/006 ,  B29K2995/0088 ,  C08G63/08 ,  C08L67/04 ,  C08L2203/12 ,  D01D5/38 ,  D01F1/02 ,  D01F6/92 ,  D04H3/011 ,  D04H3/16 ,  Y10T428/298 ,  Y10T442/608 ,  Y10T442/615 ,  C08L23/0884

    摘要： A method for forming biodegradable fibers is provided. The method includes blending polylactic acid with a polyepoxide modifier to form a thermoplastic composition, extruding the thermoplastic composition through a die, and thereafter passing the extruded composition through a die to form a fiber. Without intending to be limited by theory, it is believed that the polyepoxide modifier reacts with the polylactic acid and results in branching of its polymer backbone, thereby improving its melt strength and stability during fiber spinning without significantly reducing glass transition temperature. The reaction-induced branching can also increase molecular weight, which may lead to improved fiber ductility and the ability to better dissipate energy when subjected to an elongation force. To minimize premature reaction, the polylactic acid and polyepoxide modifier are first blended together at a relatively low temperature(s). Nevertheless, a relatively high shear rate may be employed during blending to induce chain scission of the polylactic acid backbone, thereby making more hydroxyl and/or carboxyl groups available for subsequent reaction with the polyepoxide modifier. Once blended, the temperature(s) employed during extrusion of the blended composition can be selected to both melt the composition and initiate a reaction of the polyepoxide modifier with hydroxyl and/or carboxyl groups of the polylactic acid. Through selective control over this method, the present inventors have discovered that the resulting fibers may exhibit good mechanical properties, both during and after melt spinning.

    摘要翻译： 提供了一种形成可生物降解纤维的方法。 该方法包括将聚乳酸与聚环氧化物改性剂混合以形成热塑性组合物，通过模头挤出热塑性组合物，然后使挤出的组合物通过模头形成纤维。 不期望受理论的限制，据信聚环氧化物改性剂与聚乳酸反应并导致其聚合物主链的支化，从而在纤维纺丝期间提高其熔体强度和稳定性，而不显着降低玻璃化转变温度。 反应诱导的分支也可以增加分子量，这可以导致改善的纤维延展性和当受到伸长力时更好地耗散能量的能力。 为了最小化过早反应，首先将聚乳酸和聚环氧化物改性剂在相对较低的温度下共混在一起。 然而，在共混期间可以采用相对高的剪切速率来诱导聚乳酸主链的断链，从而使得更多的羟基和/或羧基可用于随后与聚环氧化物改性剂的反应。 一旦共混，可以选择在共混组合物的挤出期间使用的温度以使组合物熔融，并引发聚环氧化物改性剂与聚乳酸的羟基和/或羧基的反应。 通过对该方法的选择性控制，本发明人已经发现，在熔融纺丝期间和之后，所得纤维可表现出良好的机械性能。