Olefin polymerization process
    71.
    发明授权
    Olefin polymerization process 失效
    烯烃聚合工艺

    公开(公告)号:US5480948A

    公开(公告)日:1996-01-02

    申请号:US412382

    申请日:1995-03-28

    申请人: Rolf L. Geerts

    发明人: Rolf L. Geerts

    摘要: In accordance with the present invention, there is provided a solid organoaluminoxy product prepared by reacting an organoaiuminoxane with an oxygen-containing compound selected from the group consisting of organic peroxide, alkylene oxide, or organic carbonate. Further there is provided olefin polymerization catalyst systems comprising the solid organoaluminoxy product and a transition metal-containing catalyst. Still further there is provided processes for the polymerization of olefins using the catalyst systems.

    摘要翻译: 根据本发明,提供了一种固体有机铝氧化物产物,其通过有机氧化肟与选自有机过氧化物,氧化烯或有机碳酸酯的含氧化合物反应而制备。 此外,提供了包含固体有机铝氧化物产物和含过渡金属的催化剂的烯烃聚合催化剂体系。 还提供了使用催化剂体系进行烯烃聚合的方法。

    Polymethylaluminoxane of enhanced solution stability
    75.
    发明授权
    Polymethylaluminoxane of enhanced solution stability 失效
    聚甲基铝氧烷增强溶液的稳定性

    公开(公告)号:US5416229A

    公开(公告)日:1995-05-16

    申请号:US227836

    申请日:1994-04-14

    CPC分类号: C07F5/068 C08F10/00

    摘要: Polymethylaluminoxane compositions having increased solution stability in organic solvent and, in some cases, increased polymerization activity, which comprise moieties derived from an organic compound containing an electron-rich heteroatom (e.g., from Group V and/or Group VI of the Periodic Table) and a hydrocarbyl moiety. These compositions can be formed by reaction of trimethylaluminum, the organic compound, and water. They can also be formed by reaction of pre-formed polymethylaluminoxane the organic compound, which can be a hydrocarbyl group-containing compound containing an electron-rich heteroatom (e.g., oxygen, nitrogen, or sulfur), either with or without an active hydrogen atom connected to the heteroatom. The organic compound, in some embodiments, has also been found to be effective in increasing the catalytic activity of modified polymethylaluminoxane which, in addition to methyl, contain C.sub.2 and higher alkyl groups for enhanced solution stability.

    摘要翻译: 聚甲基铝氧烷组合物在有机溶剂中具有增加的溶液稳定性,并且在一些情况下增加聚合活性,其包含衍生自含有富电子杂原子(例如,来自元素周期表的V族和/或VI族的有机化合物)的部分和 烃基部分。 这些组合物可以通过三甲基铝,有机化合物和水的反应形成。 它们也可以通过预形成的聚甲基铝氧烷的有机化合物的反应形成,有机化合物可以是含有富电子的杂原子(例如氧,氮或硫)的含烃基的化合物,其具有或不具有活性氢原子 与杂原子连接。 在一些实施方案中,已经发现有机化合物在提高改性聚甲基铝氧烷的催化活性方面是有效的,除了甲基外,还包含C2和更高级的烷基以提高溶液的稳定性。

    Polymer precursors for aluminum nitride aluminum nitride-containing
ceramics from polymeric precursors
    76.
    发明授权
    Polymer precursors for aluminum nitride aluminum nitride-containing ceramics from polymeric precursors 失效
    聚合物前体的氮化铝含氮化铝陶瓷的聚合物前体

    公开(公告)号:US5414050A

    公开(公告)日:1995-05-09

    申请号:US172016

    申请日:1993-12-22

    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. 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以形成有机铝亚胺,并将亚胺加热至50至200℃的温度来制备铝 - 氮聚合物。聚合产物可进行额外的热处理以形成 更高度交联的聚合物。 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。

    Polymeric borosilazanes and aluminosilazanes, a process for their
preparation and their use
    77.
    发明授权
    Polymeric borosilazanes and aluminosilazanes, a process for their preparation and their use 失效
    聚合硼硅氮烷和铝硅氮烷,其制备方法及其用途

    公开(公告)号:US5405982A

    公开(公告)日:1995-04-11

    申请号:US157814

    申请日:1993-11-24

    摘要: The present invention relates to polymeric boro- and aluminosilazanes corresponding to the general formula[(SiL.sub.2).sub.a (AlL.sub.2).sub.1-a L.sub.2 ].sub.xand[(SiL.sub.2).sub.a (BL).sub.1-a L.sub.2 ].sub.x,whereina=0-1whereinL means half a bridging --NR-group, or an organoamino (--NR) group, when L is attached to a silicon or aluminum atom, and wherein L means a hydrogen atom, half a bridging --NR-- group or an organoamino (--NR) group, when L is attached to a boron atom,in which each silicon and aluminum atom is triply coordinated by four nitrogen atoms and each boron atom by at least two nitrogen and at most one hydrogen atom, a process for the preparation of these polymers and their use as precursor compounds for ceramic high performance materials.

    摘要翻译: 本发明涉及对应于通式[(SiL 2)a(AlL 2)1-aL 2] x和[(SiL 2)a(BL)1-aL 2] x的聚合物硼硅烷和铝硅氮烷,其中a = 0-1其中 当L连接到硅或铝原子上时,L表示半桥连-NR基或有机氨基(-NR)基团,其中L表示氢原子,半桥连-NR-或有机氨基( - NR)基团,当L连接到硼原子上时,其中每个硅和铝原子由四个氮原子三重配位,每个硼原子由至少两个氮原子和至多一个氢原子组成,其制备方法 聚合物及其作为陶瓷高性能材料的前体化合物的用途。

    Carborane-(silane or siloxane)-unsaturated hydrocarbon based
thermosetting polymers
    80.
    发明授权
    Carborane-(silane or siloxane)-unsaturated hydrocarbon based thermosetting polymers 失效
    碳硼烷 - (硅烷或硅氧烷) - 不饱和烃基热固性聚合物

    公开(公告)号:US5292779A

    公开(公告)日:1994-03-08

    申请号:US991940

    申请日:1992-12-17

    CPC分类号: C08G77/50 C08G77/56

    摘要: This invention relates to a new class of novel inorganic-organic hybrid polymers that are formed from linear inorganic-organic hybrid polymers of varying molecular weight. These new high temperature oxidatively stable thermosetting polymers are formed from linear polymeric materials having repeat units that contain at least one alkynyl group for cross-linking purposes and at least one bis(silyl or siloxanyl)carboranyl group. These novel organoboron thermoset polymers contain an unsaturated cross-linked hydrocarbon moiety.

    摘要翻译: 本发明涉及由不同分子量的线性无机 - 有机杂化聚合物形成的新一类新型无机 - 有机杂化聚合物。 这些新的高温氧化稳定的热固性聚合物由具有重复单元的直链聚合物形成,所述重复单元含有至少一个用于交联目的的炔基和至少一个双(甲硅烷基或硅氧烷基)碳硼烷基。 这些新型有机硼热固性聚合物含有不饱和的交联烃部分。