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    Higher order star polymers having multiple polyisobutylene arms radiating from a condensed core of siloxanes and a method for the synthesis thereof
    1.
    发明授权
    Higher order star polymers having multiple polyisobutylene arms radiating from a condensed core of siloxanes and a method for the synthesis thereof 失效
    具有从硅氧烷的凝聚核心辐射的多个聚异丁烯臂的高级星形聚合物及其合成方法

    公开(公告)号：US5856392A

    公开(公告)日：1999-01-05

    申请号：US861395

    申请日：1997-05-21

    申请人： Joseph P. Kennedy ,  Naoki Omura ,  Alexander Lubnin

    发明人： Joseph P. Kennedy ,  Naoki Omura ,  Alexander Lubnin

    IPC分类号： C08L83/05 ,  C08G77/04 ,  C08G77/12 ,  C08G77/442 ,  C08G81/02

    CPC分类号： C08G81/024 ,  C08G77/442

    摘要： The synthesis and characterization of novel higher order, multi-arm star polymers comprising polyisobutylene arms connected to condensed cyclosiloxane cores are described. The synthesis has been achieved by hydrosilating olefin-capped (e.g., allyl- or isopropenyl-terminated) polyisobutylene with hydrogencyclosiloxanes carrying a plurality of Si--H groups and simultaneously and competitively converting SiH functions, in the presence of moisture, to Si--OH groups to rapidly self-condense or react with SiH groups to form coupled cyclosiloxane cores via core-core coupling. Thus, higher order stars having many more arms than first order stars can be formed.

    摘要翻译： 描述了包含连接到缩合环硅氧烷核心的聚异丁烯臂的新型高级多臂星形聚合物的合成和表征。 合成已经通过将烯烃封端（例如，烯丙基或异丙​​烯基封端的）聚异丁烯与携带多个Si-H基团的水合羟基硅氧烷进行氢化硅烷化，并且在水分存在下同时并且竞争性地将SiH官能团转化为Si-OH基团 快速自我冷凝或与SiH基团反应，通过芯 - 芯耦合形成偶联的环硅氧烷核心。 因此，可以形成具有比一阶恒星多的臂的高阶恒星。

    Water dispersions of non-uniform polyurethane particles
    3.
    发明申请
    Water dispersions of non-uniform polyurethane particles 有权
    不均匀聚氨酯颗粒的水分散体

    公开(公告)号：US20050004306A1

    公开(公告)日：2005-01-06

    申请号：US10733027

    申请日：2003-12-11

    申请人： Alexander Lubnin ,  Dennis Malaba ,  Vic Stanislawczyk ,  Gary Calhoun

    发明人： Alexander Lubnin ,  Dennis Malaba ,  Vic Stanislawczyk ,  Gary Calhoun

    IPC分类号： C08G18/08 ,  C08G18/10 ,  C08G18/12 ,  C08G18/40 ,  C08G18/42 ,  C08G18/48 ,  C08G18/66 ,  C08G18/75 ,  C08K3/00

    CPC分类号： C08G18/758 ,  C08G18/0823 ,  C08G18/10 ,  C08G18/12 ,  C08G18/4009 ,  C08G18/4238 ,  C08G18/4825 ,  C08G18/6692 ,  C08G18/755 ,  Y10S524/908 ,  Y10S525/902 ,  Y10S525/903 ,  Y10T428/31551 ,  C08G18/3231

    摘要： A novel method of preparing an aqueous dispersion of non-uniform polyurethane particles which comprises (a) preparing at least two isocyanate-terminated polyurethane prepolymers having different hydrophilicities; (b) preparing a uniform mixture of said prepolymers; and (c) dispersing the mixed prepolymers in an aqueous medium. The resulting dispersion of the prepolymers may optionally be chain extended. This method enables the preparation of core-shell particles as well as particles of other morphologies, including “raspberry”, interpenetrating network, “salt-and-pepper”, “ice-cream cone” and particles of gradient composition. Similarly, an aqueous dispersion of two different polyurethane polymers may be obtained by first preparing at least two different isocyanate-terminated polyurethane prepolymers, preparing a uniform mixture of such prepolymers and thereafter dispersing the mixture in an aqueous medium.

    摘要翻译： 一种制备非均匀聚氨酯颗粒的水性分散体的新方法，其包括（a）制备具有不同亲水性的至少两种异氰酸酯封端的聚氨酯预聚物; （b）制备所述预聚物的均匀混合物; 和（c）将混合的预聚物分散在水性介质中。 所得到的预聚物分散体可任选地进一步延伸。 这种方法能够制备核 - 壳颗粒以及其他形态的颗粒，包括“覆盆子”，互穿网络，“盐和胡椒”，“冰淇淋锥”和梯度组成颗粒。 类似地，可以通过首先制备至少两种不同的异氰酸酯封端的聚氨酯预聚物，制备这种预聚物的均匀混合物，然后将该混合物分散在水性介质中来获得两种不同聚氨酯聚合物的水分散体。