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872 条记录 (耗时 0.03 秒)

    Polysilazanes and related compositions, processes and uses
    91.
    发明授权
    Polysilazanes and related compositions, processes and uses 失效
    聚硅氮烷及相关组合物，方法和用途

    公开(公告)号：US5008422A

    公开(公告)日：1991-04-16

    申请号：US12874

    申请日：1986-12-01

    申请人： Yigal D. Blum ,  Richard M. Laine

    发明人： Yigal D. Blum ,  Richard M. Laine

    IPC分类号： C04B35/16 ,  C04B35/185 ,  C04B35/571 ,  C04B35/589 ,  C04B35/63 ,  C04B41/45 ,  C07F7/10 ,  C07F7/21 ,  C08G77/38 ,  C08G77/398 ,  C08G77/54 ,  C08G77/62 ,  C08G79/00

    CPC分类号： C04B35/589 ,  C04B35/16 ,  C04B35/185 ,  C04B35/571 ,  C04B35/6316 ,  C04B41/4554 ,  C07F7/10 ,  C07F7/21 ,  C08G77/38 ,  C08G77/398 ,  C08G77/54 ,  C08G77/62 ,  C08G79/00

    摘要： Silazanes and related compounds are prepared by (a) providing a precursor containing at least one Si-N bond, cleaving an Si-N bond in the precursor in the presence of hydrogen or a hydrogen donor, and reacting the cleavage product with a second cleavage product or with a compound containing an Si-H bond, an N-H bond, or both, to produce an initial silazane product having at least one newly formed Si-N bond or (b) providing one or more reactants which contain an Si-H bond and an N-H bond, and causing reaction to occur between the two bonds in the presence of a transition metal catalyst to form an initial silazane product having newly formed Si-N bonds. Further products may result from additional reaction of either type. Novel compounds, including siloxazanes and high molecular weight polysilazanes, are provided. The compounds may be pyroloyzed to yield ceramic materials such as silicon nitride, silicon carbide and silicon oxynitride. In a preferred embodiment, substantially pure silicon nitride and articles prepared therefrom are provided. Fibers coatings, binders, and the like may be prepared from the novel materials.

    摘要翻译： PCT No.PCT / US86 / 02266 Sec。 371日期1986年12月1日第 102（e）1986年10月1日PCT PCT日期为1986年10月24日。硅氮烷和相关化合物通过以下步骤制备：（a）提供含有至少一个Si-N键的前体，在前体中切割Si-N键 氢或氢供体的存在，并使裂解产物与第二裂解产物或含有Si-H键，NH键或两者的化合物反应，以产生具有至少一个新形成的Si的初始硅氮烷产物 -N键或（b）提供一种或多种含有Si-H键和NH键的反应物，并且在过渡金属催化剂存在下引起两键之间的反应，以形成新形成的初始硅氮烷产物 Si-N键。 其他产品可能由任一类型的额外反应引起。 提供新型化合物，包括硅氧烷和高分子量聚硅氮烷。 可以将这些化合物进行热解以产生诸如氮化硅，碳化硅和氮氧化硅的陶瓷材料。 在优选的实施方案中，提供基本上纯的氮化硅和由其制备的制品。 纤维涂料，粘合剂等可以由新型材料制备。

    Process for preparing organometallic high polymer
    92.
    发明授权
    Process for preparing organometallic high polymer 失效
    制备有机金属高聚物的方法

    公开(公告)号：US4997899A

    公开(公告)日：1991-03-05

    申请号：US488424

    申请日：1990-02-27

    申请人： Masaie Fujino

    发明人： Masaie Fujino

    IPC分类号： C08G77/48 ,  C08G77/60 ,  C08G79/00 ,  G03F7/075 ,  G03G5/07

    CPC分类号： G03G5/078 ,  C08G77/60 ,  C08G79/00 ,  G03F7/0754 ,  G03F7/0757

    摘要： An improvement in the process for preparing an organometallic polymer having a main chain constituted of silicon and/or germanium or having a main chain constituted of a linkage including carbon and silicon or germanium and further having side chain constituted of organic substituting groups, such as alkyl or aryl group. The improved process comprises the step of dehalogenating an organosilane or organogermane halide in the presence of an alkali metal and a crown ether having 28 or less carbon atoms and 10 or less oxygen atoms, whereby the organosilane or organogermane halide is polymerized by condensation. The crown ether acts as a promotor, and preferable examples used in the process of the invention include 18-crown-6 and 12-crown-4. The molecular weight of the organometallic high polymer prepared by the process of the invention distributes within a relatively narrow range in the neighborhood of about 100,000, resulting in excellent moldability of the polymer. The polymerization step is completed within a short time with good yield. The organometallic polymers prepared by the process of the invention are well suited for use as precursors for silicon carbide, photo-resists, photo-initiators and photosensitive materials for electrophotography.

    摘要翻译： 制备具有由硅和/或锗构成的主链或具有由包含碳和硅或锗的连接构成的主链并且还具有由有机取代基组成的侧链的有机金属聚合物的方法的改进，所述链由烷基 或芳基。 改进的方法包括在碱金属和具有28个或更少碳原子和10个或更少氧原子的冠醚的存在下将有机硅烷或有机锗烷卤化物脱卤的步骤，由此有机硅烷或有机锗烷卤化物通过缩合聚合。 冠醚用作促进剂，在本发明方法中使用的优选实例包括18-冠-6和12-冠-4。 通过本发明方法制备的有机金属高聚合物的分子量在约100,000附近的较窄范围内分布，导致聚合物的优异成型性。 聚合步骤在短时间内完成，产率高。 通过本发明的方法制备的有机金属聚合物非常适合用作碳化硅，光致抗蚀剂，光引发剂和用于电子照相的感光材料的前体。

    Aqueous organoalkoxysilane/metal oxide sol-gel compositions
    97.
    发明授权
    Aqueous organoalkoxysilane/metal oxide sol-gel compositions 失效
    水性有机烷氧基硅烷/金属氧化物溶胶 - 凝胶组合物

    公开(公告)号：US4814017A

    公开(公告)日：1989-03-21

    申请号：US915346

    申请日：1986-10-03

    申请人： Bulent E. Yoldas ,  Chia-Cheng Lin

    发明人： Bulent E. Yoldas ,  Chia-Cheng Lin

    IPC分类号： C09D183/04 ,  C09D183/14 ,  C09K3/00 ,  C08G79/00

    CPC分类号： C09D183/14 ,  C09D183/04

    摘要： A method is disclosed for making an organoalkoxysilane/metal oxide sol-gel composition in an essentially aqueous medium by partially hydrolyzing an organoalkoxysilane with a limited amount of water which is essentially completely consumed in the hydrolysis reaction, adding a metal alkoxide of titanium or zirconium to the essentially anhydrous partially hydrolyzed organoalkoxysilane, completely reacting the metal alkoxide with the partially hydrolyzed organoalkoxysilane to form an oxide network and then completely hydrolyzing the composition in water.

    摘要翻译： 公开了一种通过用基本上完全消耗在水解反应中的有限量的水部分水解有机烷氧基硅烷，在基本水性介质中制备有机烷氧基硅烷/金属氧化物溶胶 - 凝胶组合物的方法，将钛或锆的金属醇盐加入到 基本上无水的部分水解的有机烷氧基硅烷，使金属醇盐与部分水解的有机烷氧基硅烷完全反应形成氧化物网络，然后在水中完全水解组合物。