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    Silica supported transition metal catalyst
    33.
    发明授权
    Silica supported transition metal catalyst 失效
    二氧化硅负载过渡金属催化剂

    公开(公告)号：US06172173B2

    公开(公告)日：2001-01-09

    申请号：US08946785

    申请日：1997-10-08

    申请人： Lee Spencer ,  Brian W. S. Kolthammer ,  Miriam P. Ripplinger ,  Jeffrey J. Wooster ,  Pak-Wing S. Chum ,  Jacquelyn A. deGroot

    发明人： Lee Spencer ,  Brian W. S. Kolthammer ,  Miriam P. Ripplinger ,  Jeffrey J. Wooster ,  Pak-Wing S. Chum ,  Jacquelyn A. deGroot

    IPC分类号： C08F1014

    CPC分类号： C08L23/04 ,  C08F110/02 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2308/00 ,  C08L2314/02 ,  C08L2666/04 ,  C08F2500/08 ,  C08F2500/12 ,  C08F2500/24

    摘要： A polymer produced by a transition metal containing catalyst useful for the polymerization of &agr;-olefins is prepared by (A) forming in an inert atmosphere which excludes oxygen and moisture a slurry of (1) a porous inorganic oxide support material selected from the group consisting of silica, alumina, or a combination of silica and alumina, said support material containing not greater than about 5 millimoles of hydroxyl groups per gram of support material and a particle size not greater than about 10 microns and a surface area of from about 50 to about 800 m2/g in an inert organic liquid medium; (B) mixing said slurry with (2) an alkoxide and stirring the resultant mixture at a temperature of from about −20° C. to about 120° C. for a time sufficient to saturate the surface of the support material; (C) mixing the product form (B) with (3) a titanium compound or a combination of a titanium compound and (4) a vanadium compound and stirring the resultant mixture at a temperature of from about −20° C. to about 120° C. for a time sufficient to allow complete reaction of the titanium compound and the vanadium compound with the organomagnesium moieties remaining on the solid support; (D) mixing the product from (C) with an inert organic solution of (5) a Group IIIA metal alkyl halide at a temperature of from about −20° C. to about 120° C. for a time sufficient to complete the reduction of the titanium and vanadium, if present, compounds to their final oxidation state. Ethylene/alpha-olefin copolymers which have greater than 17 percent high density fraction and a Mw/Mn ratio of less than about 3.6 are shown to be useful in making cast films which have good stretchability and good puncture resistance. Copolymers of the present invention having the specified properties are especially useful in making the films.

    摘要翻译： 由用于α-烯烃聚合的含过渡金属的催化剂制备的聚合物是通过（A）在惰性气氛中形成的，其中不包括氧气和水分，（1）多孔无机氧化物载体材料的浆料选自 的二氧化硅，氧化铝或二氧化硅和氧化铝的组合，所述载体材料每克载体材料含有不大于约5毫摩尔羟基，粒径不大于约10微米，表面积为约50至 在惰性有机液体介质中约800m 2 / g; （B）将所述浆料与（2）醇盐混合并在约-20℃至约120℃的温度下搅拌所得混合物足以使载体材料表面饱和的时间; （C）将产品形式（B）与（3）钛化合物或钛化合物和（4）钒化合物的组合混合并在约-20℃至约120℃的温度下搅拌所得混合物 在足以允许钛化合物和钒化合物与残留在固体载体上的有机镁部分完全反应的时间; （D）将来自（C）的产物与（5）IIIA族金属烷基卤的惰性有机溶液在约-20℃至约120℃的温度下混合足以完成还原的时间 的钛和钒（如果存在）化合物达到其最终氧化态。 显示出具有大于17％的高密度分数和小于约3.6的Mw / Mn比的乙烯/α-烯烃共聚物可用于制备具有良好的拉伸性和良好的耐穿刺性的流延薄膜。 具有特定性质的本发明的共聚物在制备膜中特别有用。

    Cross-linked ethylenic polymer foam structures and process for making
    36.
    发明授权
    Cross-linked ethylenic polymer foam structures and process for making 失效
    交联乙烯聚合物泡沫结构及其制备方法

    公开(公告)号：US5387620A

    公开(公告)日：1995-02-07

    申请号：US252151

    申请日：1994-06-01

    申请人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    发明人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    IPC分类号： C08J9/06 ,  C08J9/10 ,  C08J9/14 ,  C08J9/00

    CPC分类号： C08J9/14 ,  C08J9/10 ,  C08J2323/16

    摘要： Disclosed is a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer having in an uncross-linked state has: a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63; b) a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n

    摘要翻译： 公开了交联的，基本上线性的烯属聚合物的乙烯类聚合物材料的交联乙烯类聚合物泡沫结构。 具有未交联状态的基本上线性的乙烯类聚合物具有：a）熔体流动比，I10 / I2，≥5.63; b）由以下等式定义的分子量分布Mw / Mn：Mw / Mn <（I10 / I2）-4.63; 和c）在具有大约相同的I2和Mw / Mn的线性烯属聚合物的表面熔融断裂开始时，表面熔融断裂开始时的临界剪切速率比临界剪切速率大至少50％。 进一步公开了制造上述泡沫结构的方法。

    Multilayer polyolefinic film structures having improved heat seal characteristics
    37.
    发明授权
    Multilayer polyolefinic film structures having improved heat seal characteristics 失效
    具有改善的热封特性的多层聚烯烃薄膜结构

    公开(公告)号：US5089321A

    公开(公告)日：1992-02-18

    申请号：US639648

    申请日：1991-01-10

    申请人： Pak-Wing S. Chum ,  Kaelyn C. Koch

    发明人： Pak-Wing S. Chum ,  Kaelyn C. Koch

    IPC分类号： B32B27/32

    CPC分类号： B32B27/32 ,  Y10S428/91 ,  Y10T428/24992 ,  Y10T428/2826 ,  Y10T428/31746 ,  Y10T428/31913 ,  Y10T428/3192

    摘要： Multilayer thermoplastic film structures comprising at least one heat-sealable outer layer (A) and at least one core layer (B) are disclosed. Layer (A) has improved heat sealability after irradiation (e.g. electron beam). Layer (B) has improved shrinkage after irradiation. Layer (A) is a linear polyethylene having a melt index from about 2 to about 20 g/10 minutes, a density from about 0.88 to about 0.92 g/cc, a molecular weight distribution (I.sub.10 /I.sub.2) from about 5 to about 8, a fraction of the polyethylene having a degree of branching less than or equal to 2 methyls/1000 carbons of not more than 15% by weight and a fraction of the polyethylene having a degree of branching greater than or equal to 25 methyls/1000 carbons of not more than 25% by weight of the polymer. Layer (B) is a linear polyethylene having a melt index from about 0.05 to about 5 g/10 minutes, a density from about 0.88 to about 0.94 g/cc and a molecular weight distribution (I.sub.10 /I.sub.2) from about 8 to about 30.

    摘要翻译： 公开了包括至少一个可热密封的外层（A）和至少一个芯层（B）的多层热塑性薄膜结构。 层（A）在照射后具有改善的热封性（例如电子束）。 层（B）在照射后具有改善的收缩率。 层（A）是具有约2至约20g / 10分钟的熔体指数，约0.88至约0.92g / cc的密度，约5至约8的分子量分布（I 10 / I 2） ，具有小于或等于2个甲基/ 1000个碳的支化度的不超过15重量％的聚乙烯的一部分和具有大于或等于25个甲基/ 1000个碳的支化度的聚乙烯的分数 不超过聚合物的25重量％。 层（B）是具有约0.05至约5g / 10分钟的熔体指数，约0.88至约0.94g / cc的密度和约8至约30的分子量分布（I 10 / I 2）的线性聚乙烯 。

    Optoelectronic devices incorporating fluoropolymer compositions for protection
    39.
    发明授权
    Optoelectronic devices incorporating fluoropolymer compositions for protection 有权
    含有氟聚合物组合物的光电子器件用于保护

    公开(公告)号：US09219182B2

    公开(公告)日：2015-12-22

    申请号：US14131103

    申请日：2012-07-03

    申请人： Xuming Chen ,  Pak-Wing S. Chum ,  Kevin E. Howard ,  Leonardo C. Lopez ,  William C. Sumner ,  Shaofu Wu

    发明人： Xuming Chen ,  Pak-Wing S. Chum ,  Kevin E. Howard ,  Leonardo C. Lopez ,  William C. Sumner ,  Shaofu Wu

    IPC分类号： H01L31/00 ,  H01L31/048 ,  C08K5/00

    CPC分类号： H01L31/0481 ,  C08K5/005 ,  H01L31/048 ,  Y02E10/50 ,  C08L27/18

    摘要： The fluoropolymer compositions of the present invention generally incorporate ingredients comprising one or more fluoropolymers, an ultraviolet light protection component (hereinafter UV protection component), and optionally one or more additional ingredients if desired. The UV protection component includes a combination of at least one hindered tertiary amine (HTA) compound having a certain structure and a weight average molecular weight of at least 1000. This tertiary amine is used in combination with at least one organic, UV light absorbing compound (UVLA compound) having a weight average molecular weight greater than 500. When the HTA compound and the UVLA compound are selected according to principles of the present invention, the UV protection component provides fluoropolymer compositions with significantly improved weatherability characteristics for protecting underlying materials, features, structures, components, and/or the like. In particular, fluoropolymer compositions incorporating the UV protection component of the present invention have unexpectedly improved ability to resist blackening, coloration, or other de gradation that may be caused by UV exposure. As a consequence, devices protected by these compositions would be expected to have dramatically improved service life. The compositions have a wide range of uses but are particularly useful for forming protective layers in optoelectronic devices.

    摘要翻译： 本发明的含氟聚合物组合物通常包含含有一种或多种含氟聚合物的组分，紫外线防护组分（以下称为UV保护组分），以及任选的一种或多种另外的组分。 UV保护组分包括至少一种具有一定结构和重均分子量至少为1000的受阻叔胺（HTA）化合物的组合。该叔胺与至少一种有机的UV光吸收化合物 （UVLA化合物）。当根据本发明的原理选择HTA化合物和UVLA化合物时，UV保护组分提供具有显着改善的耐候性特征的含氟聚合物组合物，用于保护下面的材料，特征 ，结构，部件和/或类似物。 特别地，结合本发明的紫外线防护组分的含氟聚合物组合物意外地改善了抗紫外线曝光引起的黑化，着色或其它脱色的能力。 因此，预期受这些组合物保护的装置将有显着改善的使用寿命。 该组合物具有广泛的用途，但特别适用于在光电器件中形成保护层。