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    Controlled polymerization of silazane monomers
    4.
    发明授权
    Controlled polymerization of silazane monomers 失效
    硅氮烷单体的控制聚合

    公开(公告)号：US5017640A

    公开(公告)日：1991-05-21

    申请号：US421994

    申请日：1989-10-16

    申请人： Jean-Jacques Lebrun ,  Christina Bordone

    发明人： Jean-Jacques Lebrun ,  Christina Bordone

    IPC分类号： C01B21/068 ,  C01B31/36 ,  C04B35/571 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

    CPC分类号： C08G77/62 ,  C04B35/571 ,  C04B35/589

    摘要： Organopolysilazanes or organopoly(disilyl)silazanes having controlled physicochemical properties, well adapted for shaping and pyrolysis into useful ceramic articles, are prepared by catalytically polymerizing a silazane monomer to a desired degree of polymerization, and then, either during or upon completion of polymerization, contacting the polymerization reaction medium with at least one adsorbent material.

    摘要翻译： 具有受控物理化学性质的有机聚硅氮烷或有机（二甲硅烷基）硅氮烷通过将硅氮烷单体催化聚合成所需聚合度，然后在聚合反应完成期间或接触完成后制备，其适于成型和热解成有用的陶瓷制品 具有至少一种吸附材料的聚合反应介质。

    Hardening of fusible polysilazanes and SiC/Si.sub.3 N.sub.4 ceramics produced therefrom
    9.
    发明授权
    Hardening of fusible polysilazanes and SiC/Si.sub.3 N.sub.4 ceramics produced therefrom 失效
    由其制造的可熔聚硅氮烷和SiC / Si3N4陶瓷的硬化

    公开(公告)号：US5124283A

    公开(公告)日：1992-06-23

    申请号：US713594

    申请日：1991-06-11

    申请人： Jean-Jacques Lebrun ,  Charles Bobichon ,  Olivier Caix

    发明人： Jean-Jacques Lebrun ,  Charles Bobichon ,  Olivier Caix

    IPC分类号： C04B35/571 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

    CPC分类号： C04B35/589 ,  C04B35/571 ,  C08G77/62

    摘要： Essentially infusible/insoluble crosslinked polysilazanes, well adapted for pyrolysis and conversion into silicon carbide and/or silicon nitride ceramic materials, are produced by intimately contacting a fusible and organic solvent soluble polysilazane starting material with an effective crosslinking amount of gaseous triflic acid, CF.sub.3 SO.sub.3 H, and in which starting polysilazane the organic radicals directly bonded to silicon atoms are saturated and/or aromatic hydrocarbon radicals and such starting polysilazane being devoid of hydrogen atoms directly bonded to a silicon atom.

    摘要翻译： 通过将易熔和有机溶剂可溶性聚硅氮烷起始材料与有效交联量的气态三氟甲磺酸CF 3 SO 3 H紧密接触，生产出适用于热解和转化成碳化硅和/或氮化硅陶瓷材料的本质上不熔/不溶性的交联聚硅氮烷， 并且其中起始聚硅氮烷直接键合到硅原子的有机基团是饱和的和/或芳族烃基，并且这种起始聚硅氮烷没有与硅原子直接键合的氢原子。

    Production of diorganopolysiloxanes having silanol end groups
    10.
    发明授权
    Production of diorganopolysiloxanes having silanol end groups 失效
    生产具有硅烷醇端基的二有机聚硅氧烷

    公开(公告)号：US4960850A

    公开(公告)日：1990-10-02

    申请号：US182462

    申请日：1988-04-18

    申请人： Lucien Billet ,  Jean-Jacques Lebrun

    发明人： Lucien Billet ,  Jean-Jacques Lebrun

    IPC分类号： C08G77/06 ,  C08G77/08 ,  C08G77/16 ,  C08G77/22 ,  C08G77/32 ,  C08G77/38

    CPC分类号： C08G77/08 ,  C08G77/16 ,  C08G77/32

    摘要： Polydiorganosiloxanes having silanol end groups, well suited for the production of vulcanizable silicone compositions, are conveniently prepared by bulk polycondensing a polydiorganosiloxane oligomer having silanol end groups in a closed reaction zone in the presence of a catalytically effective amount of trifluoromethylsulfonic acid, at a temperature of from 20.degree. to 160.degree. C., while continuously removing water of polycondensation, and terminating the polycondensation reaction by adding a catalyst neutralizing amount of a cyclopolydiorganosilazane or a polydiorganosilazane having diorganoaminosilyl end groups to the medium of reaction.

    摘要翻译： 具有硅烷醇端基的具有硅烷醇端基的聚二有机硅氧烷通过在催化有效量的三氟甲基磺酸的存在下，在封闭的反应区中在具有硅烷醇端基的聚二有机硅氧烷低聚物下，在温度为 20℃至160℃，同时连续除去缩聚水，并通过向反应介质中加入催化剂中和量的环状聚二有机硅氮烷或具有二有机氨基甲硅烷基端基的聚二有机硅氮烷来终止缩聚反应。