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    Production of diorganopolysiloxanes having silanol end groups
    1.
    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。

    Boron/nitrogen preceramic polymers and boron nitride ceramic materials produced therefrom
    3.
    发明授权
    Boron/nitrogen preceramic polymers and boron nitride ceramic materials produced therefrom 失效
    BORON / NITROGEN PRECERAMIC POLYMERS和BORON NITRIDE CERAMIC MATERIALS PRODUCER THEREFROM

    公开(公告)号：US5118774A

    公开(公告)日：1992-06-02

    申请号：US643692

    申请日：1991-01-22

    申请人： Gerard Mignani ,  Jean-Jacques Lebrun

    发明人： Gerard Mignani ,  Jean-Jacques Lebrun

    IPC分类号： C04B35/583 ,  C04B35/622 ,  C08G79/00 ,  C08G79/08 ,  D01F9/10

    CPC分类号： C08G79/08 ,  C04B35/583 ,  C04B35/62227

    摘要： Crosslinked random boron/nitrogen preceramic polymers are prepared by reacting (a) admixture of a trihalogenoborane A and a cyclic boron/nitrogen compound B containing recurring structural units of the following general formula (1): ##STR1## in which A is a halogen atom and R is a hydrogen atom, or a hydrocarbyl, organosilyl or hydrogenoorganosilyl radical, with (b) an amino compound C containing at least one --NH.sub.2 group; the resulting polymers are facilely pyrolyzed into boron nitride ceramic materials.

    摘要翻译： 通过使（a）三卤代硼烷A和含有以下通式（1）的重复结构单元的环状硼/氮化合物B反应制备交联的无规硼/氮前陶瓷聚合物：其中A是 卤素原子，R为氢原子，或烃基，有机甲硅烷基或氢有机甲硅烷基，（b）含有至少一个-NH 2基团的氨基化合物C; 所得聚合物易于热解成氮化硼陶瓷材料。

    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：US5037933A

    公开(公告)日：1991-08-06

    申请号：US421944

    申请日：1989-10-16

    申请人： Jean-Jacques Lebrun ,  Charles Bobichon

    发明人： Jean-Jacques Lebrun ,  Charles Bobichon

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

    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 ion exchange 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至所需聚合度而制备，其适于成型和热解成有用的陶瓷制品，然后在聚合期间或完成后， 使聚合反应介质与至少一种离子交换材料接触。

    Hardening of fusible polysilazanes and SiC/Si.sub.3 N.sub.4 ceramics produced therefrom
    7.
    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。

    Process for the preparation of organopolysilazanes and of organopoly(disilyl)silazanes with improved thermal behavior and use of such silazanes as ceramic precursors
    8.
    发明授权
    Process for the preparation of organopolysilazanes and of organopoly(disilyl)silazanes with improved thermal behavior and use of such silazanes as ceramic precursors 失效
    用于制备有机聚硅氮烷和有机（二甲硅烷基）硅氮烷的方法，具有改进的热行为和使用这种硅氮烷作为陶瓷前体

    公开(公告)号：US4689382A

    公开(公告)日：1987-08-25

    申请号：US832394

    申请日：1986-02-24

    申请人： Jean-Jacques Lebrun ,  Hugues Porte

    发明人： Jean-Jacques Lebrun ,  Hugues Porte

    IPC分类号： C04B35/00 ,  C04B35/571 ,  C04B35/589 ,  C04B35/63 ,  C08G77/00 ,  C08G77/48 ,  C08G77/62 ,  D01F9/08 ,  D01F9/10 ,  C08G77/06

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

    摘要： The present invention relates to a process for the treatment of polysilazane in a homogeneous phase with a catalytically effective quantity of an acid catalyst selected from HClO.sub.4 and CF.sub.3 SO.sub.3 H. The polysilazane is preferably selected from the group consisting of organopolysilazane, organopoly(disilyl)silazane and mixtures thereof. The organic radicals bonded to the silicon atoms are preferably saturated or aromatic hydrocarbon radicals and the silicon atoms of the polysilazane are substantially free from any hydrogen atom bonded directly to the silicon atoms.The polysilazanes treated in this manner have good thermal behavior and, are particularly useful as precursors of ceramic products.

    摘要翻译： 本发明涉及用催化有效量的选自HClO4和CF3SO3H的酸催化剂处理均相的聚硅氮烷的方法。 聚硅氮烷优选选自有机聚硅氮烷，有机聚（二甲硅烷基）硅氮烷及其混合物。 与硅原子键合的有机基团优选为饱和或芳族烃基，聚硅氮烷的硅原子基本上不含直接键合到硅原子上的氢原子。 以这种方式处理的聚硅氮烷具有良好的热性能，并且特别可用作陶瓷产品的前体。