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    • 96. 发明授权
    • Process for producing .alpha.-olefin polymers
    • 制备α-烯烃聚合物的方法
    • US4460757A
    • 1984-07-17
    • US403105
    • 1982-07-29
    • Akihiro SatoMasami TachibanaToshihiro UwaiKenji MatsudaYoshiharu Higuchi
    • Akihiro SatoMasami TachibanaToshihiro UwaiKenji MatsudaYoshiharu Higuchi
    • C08F4/00C08F2/00C08F4/60C08F4/64C08F10/00
    • C08F10/00Y10S526/904
    • A process for producing highly crystalline .alpha.-olefin polymers of good particle form with high yield is provided, which comprises polymerizing .alpha.-olefin in the presence of a preactivated catalyst obtained by reacting a reaction product (I) of organoaluminum compound (A.sub.1) with electron donor (B.sub.1), with TiCl.sub.4 to obtain a solid product (II); further reacting (II) with electron donor (B.sub.2) and electron acceptor to obtain a solid product (III); during or/and after the reaction step for obtaining (II) or/and during or/and after the reaction step for obtaining (III), subjecting (II) or (III), to polymerization treatment with .alpha.-olefin; and combining the resulting final solid product with organo-aluminum compound (A.sub.2) and a reaction product (G) of organo-aluminum compound (A.sub.3) with electron donor (B.sub.3) to obtain a preactivated catalyst; and preferably, in this combination, further subjecting a part or the total of the catalyst to polymerization treatment with .alpha.-olefin in the presence of the final solid product and (A.sub.2) to obtain another preactivated catalyst. The catalyst has a superior storage stability and heat stability.
    • 提供了一种以高产率生产具有良好颗粒形式的高结晶性α-烯烃聚合物的方法,其包括在通过使有机铝化合物(A1)的反应产物(I)与电子反应获得的预活化催化剂存在下聚合α-烯烃 (B1)与TiCl4得到固体产物(II); 进一步使(II)与电子给体(B2)和电子受体反应得到固体产物(III); 在用于获得(II)的反应步骤期间或/和/或在反应步骤中或/或之后获得(III),使(II)或(III)进行聚合处理的α-烯烃; 将得到的最终固体产物与有机铝化合物(A2)和有机铝化合物(A3)的反应产物(G)与电子给体(B3)合并,得到预活化催化剂; 并且优选地,在该组合中,在最终固体产物和(A2)的存在下,使一部分或全部催化剂进一步用α-烯烃进行聚合处理,以获得另一种预活化的催化剂。 该催化剂具有优异的储存稳定性和热稳定性。
    • 100. 发明授权
    • Lighting driver circuit and light fixture
    • 照明驱动电路和灯具
    • US08680775B2
    • 2014-03-25
    • US13451669
    • 2012-04-20
    • Kenji MatsudaRyosuke Nakamura
    • Kenji MatsudaRyosuke Nakamura
    • H05B37/02
    • H05B33/0815Y02B20/346
    • A lighting fixture that suppresses blinking and flickering phenomena even when operating at very low luminance levels includes: a light source including at least one solid state light-emitting element; and a lighting driver circuit controlling the light source in accordance with a control signal. The lighting driver circuit includes an isolating flyback circuit and a control circuit. The isolating flyback circuit switches power from a DC power source and smooths the output. The control circuit controls switching operation performed by a switching element of the isolating flyback circuit via PWM signal. The control circuit provides a frequency component in accordance with the control signal to a reference signal outputted by a reference signal generator. In accordance with results of detection of the reference signal and a current flowing through the light source, the control circuit provides a stop period during which a driver controller driving the switching element is stopped.
    • 即使在非常低的亮度水平下操作也能抑制闪烁和闪烁现象的照明器具包括:包括至少一个固态发光元件的光源; 以及照明驱动电路,根据控制信号控制光源。 照明驱动电路包括隔离反激电路和控制电路。 隔离反激电路从直流电源切换电源并使输出平滑。 控制电路通过PWM信号控制由隔离反激电路的开关元件执行的开关操作。 控制电路根据控制信号向由参考信号发生器输出的参考信号提供频率分量。 根据参考信号的检测结果和流过光源的电流,控制电路提供停止驱动开关元件的驱动器控制器的停止期间。