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    Continuous process for the preparation of poly(vinyl acetate) for poly(vinyl alcohol) production
    2.
    发明授权
    Continuous process for the preparation of poly(vinyl acetate) for poly(vinyl alcohol) production 失效
    用于聚（乙烯醇）生产的聚乙酸乙烯酯的连续工艺

    公开(公告)号：US6054530A

    公开(公告)日：2000-04-25

    申请号：US38544

    申请日：1998-03-11

    申请人： Stephen Charles Webb ,  James Francis Nangeroni ,  Brian Thomas Carvill ,  Beth Ann Frey

    发明人： Stephen Charles Webb ,  James Francis Nangeroni ,  Brian Thomas Carvill ,  Beth Ann Frey

    IPC分类号： C08F6/06 ,  C08F8/12 ,  C08F16/06 ,  C08F8/00

    CPC分类号： C08F8/12 ,  B29C47/00

    摘要： An improved process for the continuous production of poly(vinyl alcohol) which involves purifying poly(vinyl acetate) paste exiting from a polymerization reactor and dissolving the substantially pure poly(vinyl acetate) in a hydrolytic alcohol-containing solvent for subsequent saponification to produce poly(vinyl alcohol). Poly(vinyl acetate) paste, containing poly(vinyl acetate), vinyl acetate, and solvent, is heated to a temperature above the glass transition temperature but below a temperature which will degrade the poly(vinyl acetate) and is fed into a flashing area of an extruding devolatilization device. Vinyl acetate and solvent are flashed through vent ports in the flashing area of the devolatilization device and can then be recycled to a polymerization reactor, if desired. A substantially pure poly(vinyl acetate) melt, exiting the flashing area, is conveyed to a mixing area of the devolatilization device where it is mixed with a hydrolytic alcohol-containing solvent to form a solution for subsequent processing in a saponification unit.

    摘要翻译： 一种用于连续生产聚（乙烯醇）的改进方法，其涉及纯化从聚合反应器中排出的聚（乙酸乙烯酯）糊料，并将基本上纯的聚（乙酸乙烯酯）溶解在含有水解醇的溶剂中用于随后的皂化以产生聚 （乙烯醇）。 将含有聚（乙酸乙烯酯），乙酸乙烯酯和溶剂的聚（乙酸乙烯酯）糊料加热到高于玻璃化转变温度但低于将使聚（乙酸乙烯酯）降解的温度并且被送入闪蒸区域 的挤出脱挥装置。 乙酸乙烯酯和溶剂通过脱挥发分装置的闪蒸区域中的排气孔闪光，然后如果需要可以再循环到聚合反应器中。 将离开闪光区域的基本上纯的聚（乙酸乙烯酯）熔体输送到脱挥发分装置的混合区域，在该混合区域与含水解醇的溶剂混合以形成用于随后在皂化单元中处理的溶液。

    Brightness enhancement film, and methods of making and using the same
    3.
    发明授权
    Brightness enhancement film, and methods of making and using the same 失效
    亮度增强膜及其制造和使用方法

    公开(公告)号：US07251079B2

    公开(公告)日：2007-07-31

    申请号：US11326158

    申请日：2006-01-04

    申请人： Kevin Patrick Capaldo ,  Brian Thomas Carvill ,  Dennis Joseph Coyle ,  Yu Hu ,  Chunghei Yeung ,  Yan Zhang

    发明人： Kevin Patrick Capaldo ,  Brian Thomas Carvill ,  Dennis Joseph Coyle ,  Yu Hu ,  Chunghei Yeung ,  Yan Zhang

    IPC分类号： G02B27/30

    CPC分类号： G02B6/0053 ,  G02B5/0221 ,  G02B5/0242 ,  G02B5/0278 ,  G02B6/0065

    摘要： In one embodiment, a brightness enhancement film comprises: a diffusing film comprising a front surface and a back surface, a coating on the front surface, and light redirecting structures disposed in the coating. The brightness enhancement film is capable of collimating light, and wherein, without the coating, the diffusing film would be capable of spread light passing through the back surface. In another embodiment, the brightness enhancement film comprises: a diffusing film comprising a front surface and a back surface, a coating on the front surface, and light redirecting structures disposed in the coating. The diffusing film has a stress retardation gradient of less than or equal to 50 nm/in, wherein an interval for calculation of the stress retardation gradient is less than 1 inch. The brightness enhancement film is capable of collimating light.

    摘要翻译： 在一个实施例中，亮度增强膜包括：扩散膜，其包括前表面和后表面，前表面上的涂层和设置在涂层中的光重定向结构。 亮度增强膜能够准直光，并且其中，在没有涂层的情况下，漫射膜能够扩散通过背面的光。 在另一个实施例中，亮度增强膜包括：扩散膜，其包括前表面和后表面，前表面上的涂层和布置在涂层中的光重定向结构。 漫射膜具有小于或等于50nm / in的应力延迟梯度，其中应力延迟梯度的计算间隔小于1英寸。 亮度增强膜能够准直光。

    Preparation of high solids poly(vinyl alcohol)/water solutions in a single screw extruder
    5.
    发明授权
    Preparation of high solids poly(vinyl alcohol)/water solutions in a single screw extruder 失效
    在单螺杆挤出机中制备高固含量聚（乙烯醇）/水溶液

    公开(公告)号：US6106756A

    公开(公告)日：2000-08-22

    申请号：US318971

    申请日：1999-05-26

    申请人： Stephen Dennis Janny ,  Brian Thomas Carvill ,  Timothy Wayne Womer

    发明人： Stephen Dennis Janny ,  Brian Thomas Carvill ,  Timothy Wayne Womer

    IPC分类号： B29C47/00 ,  B29C47/64 ,  B29C47/88 ,  B29C47/38 ,  B29C47/60

    CPC分类号： B29C47/60 ,  B29C47/0004 ,  B29C47/0014 ,  B29C47/0021 ,  B29C47/8815 ,  B29K2029/04

    摘要： A method for producing a high solids aqueous solution of poly(vinyl alcohol) in which substantially dry poly(vinyl alcohol) is first fed into a specially designed single screw extruder. Heated water is introduced through a separate entry port downstream of the feed end of the extruder. A temperature of 38 to 121.degree. C. and a back pressure of at least 20,786 kPa are applied to the extruder. The mixture of poly(vinyl alcohol) and water is conveyed through transition and metering sections of the single screw extruder to dispersive and distributive mixing sections to produce a high solids poly(vinyl alcohol) solution which is substantially free of gels. The high solids poly(vinyl alcohol) solution can be used directly in the production of products such as fibers and sheets.

    摘要翻译： 一种生产高固含量聚（乙烯醇）水溶液的方法，其中基本上干燥的聚（乙烯醇）首先进料到特别设计的单螺杆挤出机中。 加热水通过挤出机进料端下游的单独入口进入。 将38〜121℃的温度和至少20,786kPa的背压施加到挤出机。 将聚（乙烯醇）和水的混合物通过单螺杆挤出机的过渡和计量部分输送到分散和分配混合部分以产生基本上不含凝胶的高固含量聚（乙烯醇）溶液。 高固含量聚（乙烯醇）溶液可直接用于生产纤维和片材等产品。