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    • 5. 发明授权
    • Olefin polymerization process
    • 烯烃聚合工艺
    • US5298579A
    • 1994-03-29
    • US976194
    • 1992-11-13
    • Raymond E. HoffLeonard V. Cribbs
    • Raymond E. HoffLeonard V. Cribbs
    • C08F4/609C08F10/00C08J9/00
    • C08F10/00Y10S526/904Y10S526/943
    • A method of using a catalyst with a suitable cocatalyst in the polymerization or copolymerization of 1-olefins are disclosed. The catalyst is prepared by: a) contacting a Group IIA organometallic compound, like 2-methylpentanoxymagnesium chloride, or a Group III organometallic compound, like triethylaluminum, or a combination thereof, with a porous or nonporous biodegradable substrate having active surface hydroxyl groups, like cellulose, to provide a modified biodegradable substrate; then b) contacting the modified biodegradable substrate with a transition metal compound, such as a transition metal halide or alkoxide, like titanium tetrachloride or vanadium (V) trichloride oxide, to form discrete catalyst particles. The catalyst particles are used in conjunction with a suitable cocatalyst, like triethylaluminum, in the homopolymerization or copolymerization of 1-olefins. During polymerization, porous biodegradable catalyst particles are fragmented into small solid particles that are trapped within polymer. The fragmented catalyst particles are allowed to remain within the polymer; do not adversely affect the physical or esthetic properties of the polymer or articles made therefrom; and serve as biodegradable sites that facilitate environmental degradation of the polymer.
    • 公开了在1-烯烃的聚合或共聚中使用具有合适助催化剂的催化剂的方法。 该催化剂通过以下方法制备:a)使IIA族有机金属化合物如2-甲基戊氧基氯化镁或III族有机金属化合物如三乙基铝或其组合与具有活性表面羟基的多孔或无孔可生物降解底物接触,如 纤维素,以提供改性的可生物降解底物; 然后b)使改性的可生物降解底物与过渡金属化合物如过渡金属卤化物或醇盐如四氯化钛或钒(V)三氯化氧接触,以形成离散的催化剂颗粒。 催化剂颗粒与合适的助催化剂如三乙基铝一起用于1-烯烃的均聚或共聚。 在聚合过程中,多孔可生物降解的催化剂颗粒被分散在被聚集在聚合物内的小固体颗粒中。 使碎裂的催化剂颗粒保留在聚合物内; 不会对聚合物或由其制成的制品的物理或美学性质产生不利影响; 并且用作促进聚合物环境降解的可生物降解位点。
    • 7. 发明授权
    • Method for preparation of boratabenzene derivatives
    • 硼代苯衍生物的制备方法
    • US06410764B1
    • 2002-06-25
    • US09764722
    • 2001-01-18
    • Leonard V. CribbsBradley P. Etherton
    • Leonard V. CribbsBradley P. Etherton
    • C07F502
    • C07F17/00C07F5/027
    • A process for preparing boratabenzene derivatives is provided. The process includes the hydrogenation of a compound containing a boranaphthalene functional group to form a boratabenzene-containing compound. Depending on the compound containing a boranaphthalene functional group, the resulting boratabenzene compound may be converted into a catalyst suitable for olefin polymerization. A process for forming a boratabenzene derivative from a halo-dioxaborolane is also provided. In this process, a halo-dioxaborolane is reacted with a piperylide salt for form a pentadienyl dioxaborolane. The pentadienyl-dioxaborolane is reacted with a strong base to form an intermediate boratacyclohexanediene salt. The intermediate boratacyclohexanediene salt is then reacted with a trialkylaluminum compound to form an alkylboratabenzene salt.
    • 提供了一种制备硼代苯衍生物的方法。 该方法包括含有硼烷官能团的化合物的氢化以形成含硼代苯的化合物。 根据含有硼烷官能团的化合物,所得的硼代苯化合物可以转化为适用于烯烃聚合的催化剂。 还提供了由卤代二氧硼烷制备硼代苯衍生物的方法。 在该方法中,将卤代二氧杂硼杂环戊烷与哌啶子盐反应形成戊二烯基二氧杂硼杂环戊烷。 将戊二烯基二氧杂硼杂环戊烷与强碱反应形成中间体硼烷环己烷二盐。 然后将中间体硼烷环己二烯盐与三烷基铝化合物反应以形成烷基硼代苯盐。