Process for the preparation of porous polymers and polymers obtainable thereof
    2.
    发明授权
    Process for the preparation of porous polymers and polymers obtainable thereof 失效
    制备可获得的多孔聚合物和聚合物的方法

    公开(公告)号:US07183332B2

    公开(公告)日:2007-02-27

    申请号:US10450603

    申请日:2001-12-21

    IPC分类号: C08F10/06 C08F4/02 C08L23/10

    摘要: A process for preparing porous olefin polymers comprising bringing into contact in a polymerization reactor, at a temperature T1, one or more olefins of the formula (I) CH2═CHR1, R1 being hydrogen, a C1–C20-alkyl or a C6–C12-aryl group, with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-π bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the temperature up to the polymerization temperature, said process being characterized in that: a) if the temperature T1 is lower than 40° C., the temperature is raised up to the polymerization temperature is such a way that, for a time of at least one minute after the introduction temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the temperature of the reaction T2 fulfills the following condition of formula (II) wherein m is the time expressed in minutes employed for reaching the temperature T2; or b) if temperature T1 is 40° C. or higher, the reactor is maintained for a time of at least one minute at a temperature of at least 40° C.

    摘要翻译: 一种制备多孔烯烃聚合物的方法,包括在聚合反应器中,在温度T 1下接触一种或多种式(I)CH 2 -CHR的烯烃 R 1是氢,C 1 -C 20 - 烷基或C 6 - 与通过使包含不含金属-Ip键的Ti或V的化合物的球形颗粒形式的固体催化剂组分与Mg的反应获得的催化剂与Mg 卤化物,任选地含有一个或多个电子给体化合物与烷基铝(Al-烷基)化合物,然后将温度升高到聚合温度,所述方法的特征在于:a)如果温度T 1 低于40℃,温度升高到聚合温度是这样一种方式,使得在引入温度之后至少1分钟的时间,使得在 在介绍后至少一分钟 催化剂体系进入反应器中,反应温度T 2满足以下条件(II),其中m是达到温度T 2的分钟所用的时间 ; 或b)如果温度T≥0.4℃或更高,则反应器在至少40℃的温度下保持至少1分钟的时间。

    Catalyst for the polymerization of olefins
    8.
    发明授权
    Catalyst for the polymerization of olefins 失效
    用于烯烃聚合的催化剂

    公开(公告)号:US06716940B1

    公开(公告)日:2004-04-06

    申请号:US10070120

    申请日:2002-02-28

    IPC分类号: C08F442

    CPC分类号: C08F10/00 C08F4/6426

    摘要: Catalyst system for the polymerization of olefins CH2═CHR, wherein R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, comprising the product of the reaction between (a) a solid catalyst component comprising Mg, Ti, and halogen, (b) dimethylaluminium chloride (DMAC) and (c) an alkylaluinium compound, in which the molar ratio between (b) and (c) is lower than 10. This kind of catalyst system is particularly suitable for the preparation of copolymers of ethylene with &agr;-olefins due to its high capacity for incorporating the comonomer while at the same time maintaining high yields.

    摘要翻译: 用于烯烃CH 2 = CHR(其中R是氢或具有1-12个碳原子的烃基)聚合的催化剂体系包括(a)包含Mg,Ti和卤素的固体催化剂组分(b )二甲基氯化铝(DMAC)和(c)(b)和(c)之间的摩尔比低于10的烷基铝化合物。这种催化剂体系特别适用于制备乙烯与α- 烯烃,因为它具有高的并入共聚单体的能力,同时保持高产率。

    Debris shedding buoy
    9.
    发明授权
    Debris shedding buoy 失效
    碎屑脱落浮标

    公开(公告)号:US5902163A

    公开(公告)日:1999-05-11

    申请号:US854196

    申请日:1997-05-09

    IPC分类号: B63B22/16 B63B22/18

    CPC分类号: B63B22/16 B63B22/18

    摘要: A debris shedding buoy having a float body with a top and a bottom is provided. The buoy includes a slide rail, adapted for slidable engagement to a mooring line, is attached to the bottom of the float body. The slide rail is located in a generally centered position beneath the float body and is oriented in a first direction. A rudder device is affixed to the float body and adapted to produce a stabilizing force to maintain the float body in a quasi stable orientation with respect to a current direction, with the first direction being generally aligned to the current direction. Debris lodging against the float body overcomes the stabilizing force produced by the rudder device, causing the float body to rotate from the quasi stable orientation to a second orientation to shed the debris whereupon the float body rotates back to the quasi stable orientation.

    摘要翻译: 提供具有顶部和底部的浮体的碎屑脱落浮标。 浮子包括适于滑动接合到系泊线的滑轨,附接到浮体的底部。 滑轨位于浮子体下方的大致中心位置并且沿第一方向定向。 方向舵装置固定在浮子体上并适于产生稳定力,以使浮体相对于电流方向保持在准稳定的方位,而第一方向大致与电流方向对准。 靠在浮体上的碎屑克服了由舵装置产生的稳定力,导致浮体从准稳定方向旋转到第二方位,从而使浮体转动回到准稳定方向。

    Hyperpure propylene polymer
    10.
    发明授权
    Hyperpure propylene polymer 失效
    高压丙烯聚合物

    公开(公告)号:US5557025A

    公开(公告)日:1996-09-17

    申请号:US675229

    申请日:1991-03-26

    IPC分类号: C08F10/00 C07C2/08 C07C2/22

    CPC分类号: C08F10/00

    摘要: A process for preparing hyperpure propylene (co)polymers comprising polymerizing the monomer(s) in liquid monomer in the presence of a catalyst obtained by reacting an Al-trialkyl compound with a solid catalyst component comprising magnesium dihalide in active form, having supported thereon a titanium chloride or chloroalcoholate, and an ether having the general formula: ##STR1## where R and R" are the same or different and are C.sub.2-18 alkyl, C.sub.3-18 cycloalkyl, C.sub.6-18 aryl, C.sub.7-18 arylalkyl or alkylaryl radicals.

    摘要翻译: 一种制备超纯丙烯(共)聚合物的方法,包括在通过使三烷基铝化合物与包含活性形式的二卤化镁的固体催化剂组分反应获得的催化剂存在下使液体单体聚合的单体,其上负载有 氯化钛或氯代醇化物,以及具有以下通式的醚:其中R和R“相同或不同,为C2-18烷基,C3-18环烷基,C6-18芳基,C7-18 芳基烷基或烷基芳基。