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    Cellulose ester compositions having low birefringence and films made therefrom
    21.
    发明授权
    Cellulose ester compositions having low birefringence and films made therefrom 有权
    具有低双折射率的纤维素酯组合物和由其制成的薄膜

    公开(公告)号：US08710214B2

    公开(公告)日：2014-04-29

    申请号：US12634731

    申请日：2009-12-10

    申请人： Marcus David Shelby ,  Michael Eugene Donelson ,  Bradley Howard Dayvolt ,  Alan Kent Wilson ,  Bryan Scott Kirkman

    发明人： Marcus David Shelby ,  Michael Eugene Donelson ,  Bradley Howard Dayvolt ,  Alan Kent Wilson ,  Bryan Scott Kirkman

    IPC分类号： C08B3/16 ,  C08B3/00 ,  C08B3/08 ,  C08B3/06

    CPC分类号： G02B5/3033 ,  C08B3/06 ,  C08B3/08 ,  C08B3/16 ,  C08J5/18 ,  C08J2301/14 ,  C08K5/0016 ,  C08L1/14

    摘要： The present invention relates to cellulose esters having low hydroxyl content for use in optical applications, such as liquid crystal display (LCD) films. Films made with low hydroxyl levels and a given ratio of non-acetyl ester to hydroxyl level have been found to have low intrinsic birefringence. These films can be cast, molded, or otherwise oriented without an appreciable birefringence or optical distortion (i.e. retardation). Such features make these films useful in polarizer, protective, and compensator films as well as molded optical parts, such as lenses. Furthermore, it has also been found that resins of the present invention can also be made to have “+C plate” behavior either by melt or solvent based processing, a characteristic which is not typical of cellulose esters. Such +C behavior allows films to be produced having unique compensatory behavior. Other embodiments of the invention relate to methods melt casting films while minimizing birefringence formation.

    摘要翻译： 本发明涉及用于光学应用的低羟基含量的纤维素酯，例如液晶显示（LCD）膜。 已经发现具有低羟基水平和给定比例的非乙酰酯与羟基水平的膜具有低固有双折射。 这些膜可以铸造，模制或以其他方式定向，而没有明显的双折射或光学变形（即延迟）。 这些特征使得这些膜可用于偏振器，保护膜和补偿膜以及模制的光学部件，例如透镜。 此外，还发现本发明的树脂也可以通过熔融或溶剂基加工制成具有“+ C板”的行为，这是不是典型的纤维素酯的特征。 这种+ C行为允许制作具有独特补偿行为的胶片。 本发明的其它实施方案涉及熔融流延膜的方法，同时最小化双折射形成。

    Screw designs having improved performance with low melting PET resins
    23.
    发明授权
    Screw designs having improved performance with low melting PET resins 有权
    具有低熔点PET树脂性能的螺杆设计

    公开(公告)号：US08057726B2

    公开(公告)日：2011-11-15

    申请号：US12471891

    申请日：2009-05-26

    申请人： Marcus David Shelby ,  Michael Eugene Donelson ,  Frederick Leslie Colhoun ,  Steven Lee Stafford ,  Mark Edward Stewart ,  Stephen Weinhold ,  Edward Lewis Boochard ,  Robert Noah Estep

    发明人： Marcus David Shelby ,  Michael Eugene Donelson ,  Frederick Leslie Colhoun ,  Steven Lee Stafford ,  Mark Edward Stewart ,  Stephen Weinhold ,  Edward Lewis Boochard ,  Robert Noah Estep

    IPC分类号： B29C45/60

    CPC分类号： B29C33/76 ,  B29C45/0001 ,  B29C45/60 ,  B29C47/0004 ,  B29C47/0014 ,  B29C47/0021 ,  B29C47/0023 ,  B29C47/60 ,  B29C47/6018 ,  B29K2067/00 ,  B29K2105/256

    摘要： Disclosed is a process for a melt processing a polyethylene terephthalate resin characterized by one or more of the following. The polyester particles may have at least two melting peaks wherein one of the at least two melting peaks is a low peak melting point with a range from 140° C. to 220° C., or from 140° C. to 230° C., and having a melting endothermic area of at least the absolute value of 1 J/g. The polyester particles may have one or more melting peaks at least one of which when measured on a DSC first heating scan has a heating curve departing from a baseline in the endothermic direction at a temperature of less than or equal to 200° C. The polyester particles may have an It.V. at their surface which is less than 0.25 dL/g higher than the It.V. at their center. The polyester particles may have not been solid stated. The melt processing device comprises a screw with a total length, L, a feed zone length in the range from 0.16L and 0.45L, a taper angle, φ, in the range from 0.5 degrees and 5.0 degrees and a compression ratio, CR, in the range from 2.0 and 5.0.

    摘要翻译： 公开了一种熔融加工聚对苯二甲酸乙二醇酯树脂的方法，其特征在于以下一种或多种。 聚酯颗粒可以具有至少两个熔融峰，其中至少两个熔融峰中的一个是低峰值熔点，范围为140℃至220℃，或140℃至230℃。 并且具有至少绝对值为1J / g的熔融吸热面积。 聚酯颗粒可以具有一个或多个熔融峰，其中至少一个在DSC第一次加热扫描中测量时具有在小于或等于200℃的温度下从吸热方向的基线离开的加热曲线。聚酯 颗粒可能有一个It.V. 在它们的表面上比It.V高出0.25dL / g。 在他们的中心。 聚酯颗粒可能不是固体的。 熔融加工装置包括总长度为L的螺杆，在0.16L和0.45L范围内的进料区长度，在0.5度和5.0度范围内的锥角＆phgr，压缩比CR 在2.0和5.0之间。

    Cellulose ester compositions having low birefringence and films made therefrom comprising a plasticizer
    26.
    发明授权
    Cellulose ester compositions having low birefringence and films made therefrom comprising a plasticizer 有权
    具有低双折射率的纤维素酯组合物和由其制成的膜包含增塑剂

    公开(公告)号：US08735572B2

    公开(公告)日：2014-05-27

    申请号：US12634736

    申请日：2009-12-10

    申请人： Marcus David Shelby ,  Michael Eugene Donelson ,  Bradley Howard Dayvolt ,  Alan Kent Wilson ,  Bryan Kirkman

    发明人： Marcus David Shelby ,  Michael Eugene Donelson ,  Bradley Howard Dayvolt ,  Alan Kent Wilson ,  Bryan Kirkman

    IPC分类号： C08B3/16 ,  C08B3/00 ,  C08B3/08 ,  C08B3/06

    CPC分类号： G02B5/3033 ,  C08B3/06 ,  C08B3/08 ,  C08B3/16 ,  C08J5/18 ,  C08J2301/14 ,  C08K5/0016 ,  C08L1/14

    摘要： The present inventions relate to cellulose esters having low hydroxyl content for use in optical applications, such as liquid crystal display (LCD) films. Films with low hydroxyl levels and a given ratio of non-acetyl ester to hydroxyl level have low intrinsic birefringence. These films can be cast, molded, or otherwise oriented without an appreciable birefringence or optical distortion (i.e. retardation). These films are useful in polarizer, protective, and compensator films and in molded optical parts, such as lenses. The resins of the present inventions can also be made to have “+C plate” behavior either by melt or solvent based processing, which is uncharacteristic of cellulose esters. Such +C behavior allows films having unique compensatory behavior. Other embodiments of the invention relate to methods of melt casting films while minimizing birefringence. Another embodiment of the invention is directed to films made from the cellulose esters described herein further comprising a plasticizer.

    摘要翻译： 本发明涉及用于光学应用的低羟基含量的纤维素酯，例如液晶显示（LCD）膜。 具有低羟基水平和给定比例的非乙酰酯与羟基水平的膜具有低固有双折射。 这些膜可以铸造，模制或以其他方式定向，而没有明显的双折射或光学变形（即延迟）。 这些膜可用于偏光镜，保护膜和补偿膜以及模制光学部件，例如透镜。 本发明的树脂也可以通过熔体或溶剂基处理制成具有“+ C”板的行为，这是纤维素酯的不合格的。 这种+ C行为允许电影具有独特的补偿行为。 本发明的其它实施方案涉及熔融浇铸薄膜的方法，同时最小化双折射。 本发明的另一个实施方案涉及由本文所述的纤维素酯制成的进一步包含增塑剂的薄膜。