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46 条记录 (耗时 0.017 秒)

    Process for the preparation of polybutadiene with a low branching degree
    43.
    发明申请
    Process for the preparation of polybutadiene with a low branching degree 有权
    具有低支化度的聚丁二烯的制备方法

    公开(公告)号：US20050182213A1

    公开(公告)日：2005-08-18

    申请号：US11038117

    申请日：2005-01-21

    申请人： Gian Viola ,  Fabio Bacchelli

    发明人： Gian Viola ,  Fabio Bacchelli

    IPC分类号： C08K3/04 ,  C08C19/00 ,  C08F4/54 ,  C08F4/606 ,  C08F8/00 ,  C08F136/06 ,  C08K3/06 ,  C08L9/00 ,  C08F4/44

    CPC分类号： C08C19/00 ,  C08F136/06 ,  C08F4/545

    摘要： Process for the preparation of polybutadiene with a low branching degree which comprises: (a) a first polymerization step of butadiene in the presence of organic solvents and in the presence of a catalytic system comprising (a1) a derivative of neodymium; (a2) an aluminum alkyl having general formula (I) AlR1R2R3; (a3) an organo aluminum derivative containing at least one halogen atom, preferably chlorine; the above first step being carried out up to a conversion of butadiene >98% to give a linear polybutadiene (gm=1) with a content of 1,4-cis units greater than 93% and a Mw/Mn ranging from 2.2 to 2.9; (b) treatment of the polymeric solution obtained at the end of step (a) with a peroxide, (c) recovery of the polybutadiene with a low branching degree obtained at the end of step (b).

    摘要翻译： 具有低支化度的聚丁二烯的制备方法，其包括：（a）在有机溶剂存在下和在（a1）钕衍生物的催化体系存在下的丁二烯的第一聚合步骤; （a2）具有通式（I）的烷基铝：AlR 1 R 2 R 3 R 3; （a3）含有至少一个卤素原子，优选氯的有机铝衍生物; 进行上述第一步骤直至丁二烯转化率> 98％，得到1,4-顺式单元的含量大于93％的线性聚丁二烯（g -1）= 1）和 Mw / Mn为2.2〜2.9; （b）用过氧化物处理在步骤（a）结束时获得的聚合物溶液，（c）回收步骤（b）结束时获得的低支化度的聚丁二烯。

    Catalyst for the polymerization of alpha-olefins containing substituted amino silane compounds
    44.
    发明授权
    Catalyst for the polymerization of alpha-olefins containing substituted amino silane compounds 失效
    用于含有取代氨基硅烷化合物的α-烯烃聚合的催化剂

    公开(公告)号：US6130180A

    公开(公告)日：2000-10-10

    申请号：US996854

    申请日：1997-12-23

    申请人： Constantine A. Stewart ,  Eric J. Evain

    发明人： Constantine A. Stewart ,  Eric J. Evain

    IPC分类号： C07F7/18 ,  C08F4/606 ,  C08F4/642 ,  C08F4/646 ,  C08F4/654 ,  C08F10/00 ,  B01J31/00 ,  C08F4/656

    CPC分类号： C07F7/184 ,  C08F10/00

    摘要： An aminosilane of the formula: ##STR1## where R.sub.1 is a linear or branched C.sub.1-22 alkyl or C.sub.3-22 cycloalkyl, which may be substituted with at least one halogen atom; R.sub.2 is a bis(linear or branched C.sub.1-22 alkyl or C.sub.3-22 cycloalkyl)amino, a substituted piperidinyl, a substituted pyrrolidinyl, decahydroquinolinyl, 1,2,3,4-tetrahydroquinolinyl or 1,2,3,4-tetrahydroisoquinolinyl, with the substituent selected from the group consisting of C.sub.1-8 alkyl, pheny. C.sub.1-8 linear or branched alkylsubstituted phenyl and trimethylsilyl, with the proviso that when the substituent is C.sub.1-8 alkyl, there must be at least two such substituent groups present and R.sub.1 must contain halogen; and R.sub.3 is a linear or branched C.sub.1-8 alkyl or C.sub.3-8 cycloalkyl. The aminosilane may be reacted with an aluminum-alkyl compound and a solid component comprising a titanium compound having at least one titanium-halogen bond and an electron donor, both supported on an activated anhydrous magnesium dihalide, to form a catalyst for polymerization of olefins.

    摘要翻译： 下式的氨基硅烷：其中R 1是可被至少一个卤素原子取代的直链或支链C 1-22烷基或C 3-20环烷基; R2是双（直链或支链C 1-22烷基或C 3--22环烷基）氨基，取代的哌啶基，取代的吡咯烷基，十氢喹啉基，1,2,3,4-四氢喹啉基或1,2,3,4-四氢异喹啉基， 与选自C 1-8烷基，苯基的取代基取代。 C 1-8直链或支链烷基取代的苯基和三甲基甲硅烷基，条件是当取代基为C 1-8烷基时，必须存在至少两个这样的取代基，R1必须含有卤素; 并且R 3是直链或支链C 1-8烷基或C 3-8环烷基。 氨基硅烷可以与铝 - 烷基化合物和包含具有至少一个钛 - 卤素键的钛化合物和电子给体的固体组分反应，两者都负载在活性无水二卤化镁上，形成烯烃聚合催化剂。