Process for increasing the melt strength of polypropylene
    57.
    发明授权
    Process for increasing the melt strength of polypropylene 失效
    提高聚丙烯熔体强度的方法

    公开(公告)号:US06951904B1

    公开(公告)日:2005-10-04

    申请号:US09600363

    申请日:1999-01-19

    摘要: A process for modifying a polypropylene (co)polymer wherein said process comprises melt mixing the polypropylene (co)polymer in the presence of an initiator wherein said initiator is selected from the group defined by formula (1), wherein R is selected from the group consisting of optionally substituted C1 to C18 acyl, optionally substituted C1 to C18 alkyl, aroyl defined by formula (2), and compounds of formula (3), wherein U, V, X, Y, Z, U′, V′, X′, Y′ and Z′ are independently selected from the group consisting hydrogen; halogen; C1-C18 alkyl; C1-C18 alkoxy, aryloxy, acyl, acyloxy, aryl, carboxy, alkoxycarbonyl, aryloxycarbonyl, trialkyl silyl, hydroxy, or a moiety of formula (4), and wherein T is alkylene.

    摘要翻译: 一种改性聚丙烯(共)聚合物的方法,其中所述方法包括在引发剂存在下熔融混合聚丙烯(共)聚合物,其中所述引发剂选自式(1)所定义的基团,其中R选自 由任选取代的C 1至C 18酰基,任选取代的C 1至C 18烷基,被定义的芳酰基 式(3)的化合物,其中U,V,X,Y,Z,U',V',X',Y'和Z'独立地选自氢; 卤素; C1-C18烷基; C 1 -C 18烷氧基,芳氧基,酰基,酰氧基,芳基,羧基,烷氧基羰基,芳氧基羰基,三烷基甲硅烷基,羟基或式(4)的部分,其中T是亚烷基。

    Synthesis of dithioester chain transfer agents and use of bis(thioacyl) disulfides or dithioesters as chain transfer agents
    58.
    发明授权
    Synthesis of dithioester chain transfer agents and use of bis(thioacyl) disulfides or dithioesters as chain transfer agents 有权
    二硫代酯链转移剂的合成和双(硫代酰基)二硫化物或二硫代酯作链转移剂的用途

    公开(公告)号:US06512081B1

    公开(公告)日:2003-01-28

    申请号:US09743802

    申请日:2001-01-22

    IPC分类号: C08G7526

    摘要: This invention relates to the synthesis of dithiocarboxylic acid esters by reaction of bis(thioacyl) disulphides, thioacetals or vinylidane bis(thioether) with free-radicals (optionally in the presence of monomers). The invention also relates to processes for the synthesis of polymers utilising these dithioesters as polymerisation regulators (chain transfer agents) or to the use of bis(thioacyl) disulphides to generate dithioester chain transfer agents in situ.

    摘要翻译: 本发明涉及通过双(硫代酰基)二硫化物,硫代缩醛或亚乙烯基二(硫醚)与自由基(任选在单体存在下)反应来合成二硫代羧酸酯。 本发明还涉及使用这些二硫代酯作为聚合调节剂(链转移剂)合成聚合物的方法,或涉及使用双(硫代酰基)二硫化物在原位产生二硫代酯链转移剂的方法。

    Modified polyesters
    59.
    发明授权
    Modified polyesters 失效
    改性聚酯

    公开(公告)号:US06350822B1

    公开(公告)日:2002-02-26

    申请号:US09355540

    申请日:1999-10-19

    IPC分类号: C08L6700

    摘要: A polymer blend comprising a polyester, a polyfunctional acid anhydride wherein said polyfunctional acid anhydride has a functionality as described herein of three or more, and a polyhydric alcohol or precursor thereto wherein said polyhydric alcohol has a functionality of three or more, and wherein said molar ratio of said polyfunctional acid anhydride to the polyhydric alcohol or precursor thereto is in the range of 0.5:1 to (10×C):1, where C is the number of moles of alcohol or equivalent in the polyhydric alcohol or precursor thereto.

    摘要翻译: 一种聚合物共混物,其包含聚酯,多官能酸酐,其中所述多官能酸酐具有三个或更多个所述的官能度,以及多元醇或其前体,其中所述多元醇具有三个或更多个官能度,并且其中所述摩尔 所述多官能酸酐与多元醇或其前体的比例在0.5:1至(10xC):1的范围内,其中C是多元醇或其前体中的醇或当量的摩尔数。