Polymer precursors for aluminum nitride
    81.
    发明授权
    Polymer precursors for aluminum nitride 失效
    氮化铝的聚合物前体

    公开(公告)号:US5276105A

    公开(公告)日:1994-01-04

    申请号:US907726

    申请日:1992-07-02

    申请人: James A. Jensen

    发明人: James A. Jensen

    摘要: An aluminum-nitrogen polymer is prepared by reacting an organic nitrile with a dialkylaluminum hydride to form an organoaluminum imine, and heating the imine to a temperature of 50.degree. to 200.degree. C. for at least 2 hours. The polymeric product can be subjected to an additional heat treatment to form a more highly cross-linked polymer. After either heat treatment the polymeric product can be further reacted with a primary amine or ammonia. The organoaluminum imine as well as the aminated or non-aminated polymers can be pyrolyzed to form an aluminum nitride-containing ceramic.

    摘要翻译: 通过使有机腈与氢化二烷基铝反应形成有机铝亚胺,并将亚胺加热至50℃至200℃的温度至少2小时来制备铝 - 氮聚合物。 聚合产物可以进行额外的热处理以形成更高交联的聚合物。 在热处理之后,聚合产物可以进一步与伯胺或氨反应。 有机铝亚胺以及胺化或非胺化的聚合物可以被热解以形成含氮化铝的陶瓷。

    Process for the preparation of metallopolysilanes, and their use
    82.
    发明授权
    Process for the preparation of metallopolysilanes, and their use 失效
    制备金属多硅烷的方法及其用途

    公开(公告)号:US5250646A

    公开(公告)日:1993-10-05

    申请号:US767583

    申请日:1991-09-30

    摘要: A process for preparing metallopolysilanes, which comprises reacting at least one disilane of the general formulaR.sub.6-n Si.sub.2 (OR.sup.1).sub.n (I)in which R may be the same or different and is a hydrogen atom or a monovalent hydrocarbon radical, R.sup.1 is the same or different monovalent alkyl groups, and n is 2, 3, 4, 5 or 6, and optionally mixed with at least one compound of the general formulaR.sup.2.sub.4-m Si(OR.sup.4)m (II)in which R.sup.2 may be the same or different and is the same as R, R.sup.4 may be the same or different and is the same as R.sup.1, and m is 1, 2, 3 or 4, with at least one compound of the general formula(R.sup.5 O)[A(OR.sup.5).sub.a-2.sup.O].sub.x R.sup.5 (III)in which R.sup.5 may be the same or different and is the same as R.sup.1, A is a metal from group IIa, IIIa, IVa, Va, IIIb, IVb or Vb of the Periodic Table, x is an integer of from 1 to 1,000, and a represents the valency of A, in the presence of at least one compound of the general formulaMOR.sup.3 (IV)in which R.sup.3 is the same as R.sup.1, and M represents an alkali metal atom.

    摘要翻译: 一种制备金属多硅烷的方法,其包括使至少一种通式为R6-nSi2(OR1)n(Ⅰ)的乙硅烷与其中R可以相同或不同,为氢原子或一价烃基的反应,R1为 相同或不同的一价烷基,n为2,3,4,5或6,并且任选与至少一种通式R 24-m Si(OR 4)m(II)的化合物混合,其中R 2可以相同,或 与R相同,R 4可以相同或不同,并且与R 1相同,m为1,2,3或4,与至少一种通式(R5O)[A(OR5) a-20] xR 5(III),其中R 5可以相同或不同,并且与R 1相同,A是元素周期表IIa,IIIa,IVa,Va,IIIb,IVb或Vb族的金属,x是 在至少一种通式MOR3(Ⅳ)化合物的存在下,R 3与R 1相同,M代表碱金属原子,a表示A的化合价。

    Hybrid sol-gel optical materials
    83.
    发明授权
    Hybrid sol-gel optical materials 失效
    混合溶胶 - 凝胶光学材料

    公开(公告)号:US5204381A

    公开(公告)日:1993-04-20

    申请号:US870857

    申请日:1992-04-20

    申请人: John M. Zeigler

    发明人: John M. Zeigler

    摘要: Hybrid sol-gel materials comprise silicate sols cross-linked with linear polysilane, polygermane, or poly(silane-germane). The sol-gel materials are useful as optical identifiers in tagging and verification applications and, in a different aspect, as stable, visible light transparent non-linear optical materials. Methyl or phenyl silicones, polyaryl sulfides, polyaryl ethers, and rubbery polysilanes may be used in addition to the linear polysilane. The linear polymers cross-link with the sol to form a matrix having high optical transparency, resistance to thermooxidative aging, adherence to a variety of substrates, brittleness, and a resistance to cracking during thermal cycling.

    摘要翻译: 混合溶胶凝胶材料包括与线性聚硅烷,聚锗烷或聚(硅烷 - 锗烷)交联的硅酸盐溶胶。 溶胶凝胶材料可用作标签和验证应用中的光学标识符,并且在不同方面可用作稳定的可见光透明非线性光学材料。 除了线性聚硅烷之外,可以使用甲基或苯基硅氧烷,聚芳基硫醚,聚芳基醚和橡胶状聚硅烷。 线性聚合物与溶胶交联以形成具有高光学透明度,耐热氧化老化性,对各种基材的粘附性,脆性以及热循环期间的抗开裂性的基质。

    Energy polymerizable compositions containing organometallic initiators
    84.
    发明授权
    Energy polymerizable compositions containing organometallic initiators 失效
    含有机金属引发剂的能量可聚合组合物

    公开(公告)号:US5191101A

    公开(公告)日:1993-03-02

    申请号:US799046

    申请日:1991-11-26

    摘要: An energy polymerizable composition and process therefore, comprising a cationically polymerizable material and a catalytically effective amount of an ionic salt of an organometallic complex cation as polymerization initiator, said ionic salt of an organometallic complex cation being capable of adding an intermediate strengeth nucleophile or upon photolysis capable of liberating at least one coordination site, said metal in said organometallic complex cation being selected from elements of Periodic Groups IVB, VB, VIB, VIIB, and VIIIB are disclosed. Certain of the organometallic metallic polymerization initiators are novel cationic salts.

    摘要翻译: 因此,能量可聚合组合物和方法包括阳离子可聚合材料和催化有效量的作为聚合引发剂的有机金属络合物阳离子的离子盐,所述有机金属配合物阳离子的离子盐能够加入中间体亲核试剂或光解 能够释放至少一个配位点,所述有机金属络合物阳离子中的所述金属选自周期表IVB,VB,VIB,VIIB和VIIIB的元素。 某些有机金属金属聚合引发剂是新型阳离子盐。

    Process for making ceramic materials
    90.
    发明授权
    Process for making ceramic materials 失效
    制造陶瓷材料的工艺

    公开(公告)号:US5017529A

    公开(公告)日:1991-05-21

    申请号:US449495

    申请日:1989-12-01

    摘要: A process for preparing tractable preceramic precursors of Group IIIA metal/Group VA nonmetal compounds, such as BN, in which a first reactant containing a Group VA nonmetal to hydrogen bond, such as ammonia or an amine is reacted with a second reactant containing a Group IIIA metal to hydrogen bond, such as a metal hydride, in the presence of a metal catalyst that catalyzes dehydrocoupling of the bonds to form the precursor. Further reaction of the precursor in the presence of the catalyst forms oligomeric/polymeric forms of the precursor.

    摘要翻译: 用于制备第IIIA族金属/组VA非金属化合物如BN的可处理陶瓷前体的方法,其中含有非金属至氢键的第一反应物例如氨或胺与含有基团的第二反应物反应 IIIA金属氢键,例如金属氢化物,在金属催化剂的存在下催化键的脱氢键合以形成前体。 在催化剂存在下,前体的进一步反应形成前体的低聚/聚合形式。