利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

139 条记录 (耗时 0.034 秒)

    Synthesis of macrocyclic polymers with group IIA and IIB metal cyclic organometallic initiators
    31.
    发明授权
    Synthesis of macrocyclic polymers with group IIA and IIB metal cyclic organometallic initiators 失效
    用IIA和IIB族金属环状有机金属引发剂合成大环聚合物

    公开(公告)号：US5677399A

    公开(公告)日：1997-10-14

    申请号：US743780

    申请日：1996-11-07

    申请人： James E. Hall

    发明人： James E. Hall

    IPC分类号： C08F2/00 ,  C08F4/44 ,  C08F4/50 ,  C08F4/56 ,  C08F36/04 ,  C08F297/04 ,  C08G85/00 ,  C08F8/48

    CPC分类号： C08G85/00 ,  C08F297/044 ,  C08F36/04 ,  C08F4/50 ,  C08F4/565

    摘要： The invention is a practical process for anionically synthesizing commercially significant quantities of macrocyclic polymers from polar and/or non-polar monomers by using Group IIA and IIB metal cyclic organometallic initiators. Activation of the ring metal atom results in anionic polymerization of the monomers by addition into the initiator ring at the bonds between the atom and its two adjacent carbon atoms, the metal atom acting as a bridge between the two living ends of the propagating chain. Coupling of the cyclic polymer living ends by coupling agents produces macrocyclic polymers that are stable in air and moisture and that exhibit desirable properties, such as low viscosities at high molecular weights. Such macrocyclic polymers provide enhanced polymer processability during molding, extruding and the forming of films. Macrocyclic polymers terminated with coupling agents that also provide functional groups may be compounded to produce vulcanizable elastomeric compounds and articles that exhibit reduced hysteresis properties.

    摘要翻译： 本发明是通过使用IIA族和IIB族金属环状有机金属引发剂从极性和/或非极性单体阴离子合成商业上显着量的大环聚合物的实际方法。 环金属原子的活化通过在原子和其两个相邻碳原子之间的键处加入引发剂环中导致单体的阴离子聚合，金属原子作为传播链的两个活的末端之间的桥接。 通过偶联剂将环状聚合物活性末端偶联产生在空气和水分中稳定的大环聚合物，并且表现出所需的性质，例如高分子量下的低粘度。 这种大环聚合物在模制，挤出和膜的形成期间提供了增强的聚合物加工性能。 用偶联剂封端的也可提供官能团的大环聚合物可以混合以制备可显示降低滞后性能的可硫化弹性体化合物和制品。

    Process for the preparation of tapered copolymers via in situ dispersion
    32.
    发明授权
    Process for the preparation of tapered copolymers via in situ dispersion 失效
    通过原位分散制备锥形共聚物的方法

    公开(公告)号：US5614579A

    公开(公告)日：1997-03-25

    申请号：US352938

    申请日：1994-12-09

    申请人： David M. Roggeman ,  James E. Hall

    发明人： David M. Roggeman ,  James E. Hall

    IPC分类号： C08F297/04 ,  C08K3/02

    CPC分类号： C08F297/04

    摘要： A process is provided for the preparation of tapered copolymers by the nonaqueous dispersion polymerization of a mixture of 30 to 70% by weight of a conjugated diolefin monomer, preferably butadiene, and 30 to 70% by weight of a vinyl substituted aromatic monomer, preferably styrene, in a liquid hydrocarbon dispersion medium with an anionic initiator catalyst system in the presence of a block copolymeric dispersing agent. At least one block of the dispersing agent is prepared prior to the dispersion polymerization reaction and at least one block of the dispersing agent is prepared in situ during the dispersion copolymerization. The block of the dispersing agent that is prepared in situ has the polymer structure of the tapered copolymer.

    摘要翻译： 提供了一种制备锥形共聚物的方法，该方法是通过非水分散聚合制备30至70重量％的共轭二烯烃单体，优选丁二烯和30至70重量％的乙烯基取代的芳族单体，优选苯乙烯 在具有阴离子引发剂催化剂体系的液体烃分散介质中，在嵌段共聚物分散剂存在下进行。 在分散聚合反应之前制备至少一个分散剂块，并且在分散共聚过程中原位制备至少一个分散剂块。 原位制备的分散剂块具有锥形共聚物的聚合物结构。

    Catalyst containing oligomeric oxolanyl alkane modifiers and process for the production of polymers having increased 1,2-microstructure
    38.
    发明授权
    Catalyst containing oligomeric oxolanyl alkane modifiers and process for the production of polymers having increased 1,2-microstructure 失效
    含有低聚氧杂环丁烷烷烃改性剂的催化剂以及生产具有增加的1,2-微结构的聚合物的方法

    公开(公告)号：US4429090A

    公开(公告)日：1984-01-31

    申请号：US473472

    申请日：1983-03-09

    申请人： James E. Hall

    发明人： James E. Hall

    IPC分类号： C08F4/48 ,  C08F36/04

    CPC分类号： C08F36/04

    摘要： A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between 20 and 95 percent. These (co)polymers are prepared in a hydrocarbon or other non-polar solvent from a monomer system which contains at least one 1,3-diene monomer. The catalyst system which is employed in the production of the (co)polymers of the present invention is a combination of (1) an anionic initiator based on lithium; (2) an alkyl magnesium compound or an alkyl aluminum compound or a mixture thereof; and (3) a modifier compound selected from the group consisting of linear and cyclic oligomeric oxolanyl alkanes.

    摘要翻译： 本文公开了用于制备具有20至95％之间的1,2-微结构的（共）聚合物的方法和催化剂体系。 这些（共）聚合物由含有至少一种1,3-二烯单体的单体体系在烃或其它非极性溶剂中制备。 用于生产本发明（共）聚合物的催化剂体系是（1）基于锂的阴离子引发剂的组合; （2）烷基镁化合物或烷基铝化合物或其混合物; 和（3）选自线性和环状低聚氧杂环丁烷基的改性剂化合物。

    Process for preparation of block copolymers
    39.
    发明授权
    Process for preparation of block copolymers 失效
    嵌段共聚物的制备方法

    公开(公告)号：US4291139A

    公开(公告)日：1981-09-22

    申请号：US776048

    申请日：1977-03-09

    申请人： Adel F. Halasa ,  James E. Hall ,  Adolph Para

    发明人： Adel F. Halasa ,  James E. Hall ,  Adolph Para

    IPC分类号： C08F297/04

    CPC分类号： C08F297/044

    摘要： The process described herein involves the preparation of block copolymers of the S-B-S type wherein S represents a block of polystyrene and B represents a block of polybutadiene. In order to have the initial polystyrene block soluble in the polymerization medium, cyclohexane and aromatic hydrocarbons have been used as the diluent or solvent in these polymerizations. The present process permits the use of hexane as diluent by first preparing a "foot" or small block of homopolydiene to which the initial polystyrene block is thereafter attached. This small block of homopolydiene represents no more than 12 parts, preferably no more than 10 parts by weight of homopolydiene per 100 parts by weight of the block of polystyrene to which it is attached. Generally therefore this block has a molecular weight of 200-5000 depending on the size of the attached polystyrene block and is not large enough to alter the properties of the resultant S-B-S block copolymer except to give the initial polystyrene block greater dispersibility in hexane, heptane, etc.

    摘要翻译： 本文所述的方法涉及制备S-B-S型嵌段共聚物，其中S代表聚苯乙烯嵌段，B代表聚丁二烯嵌段。 为了使初始聚苯乙烯嵌段可溶于聚合介质，环己烷和芳烃已经用作这些聚合中的稀释剂或溶剂。 本方法允许使用己烷作为稀释剂，首先制备其后连接初始聚苯乙烯嵌段的“脚”或均聚二烯的小嵌段。 该均聚亚丁基的该小块相对于每100重量份其所连接的聚苯乙烯嵌段，不超过12重量份，优选不超过10重量份的均聚二烯。 因此，通常该嵌段的分子量为200-5000，取决于连接的聚苯乙烯嵌段的尺寸，并且不足以改变所得SBS嵌段共聚物的性能，除了使初始聚苯乙烯嵌段在己烷，庚烷， 等等

    Hydrogenated block copolymers of butadiene containing a block of 1,4 and a block of 1,2-microstructure
    40.
    发明授权
    Hydrogenated block copolymers of butadiene containing a block of 1,4 and a block of 1,2-microstructure 失效
    含有1,4-嵌段的丁二烯的氢化嵌段共聚物和1,2-微结构的嵌段

    公开(公告)号：US4237245A

    公开(公告)日：1980-12-02

    申请号：US68308

    申请日：1979-08-20

    申请人： Adel F. Halasa ,  David W. Carlson ,  James E. Hall

    发明人： Adel F. Halasa ,  David W. Carlson ,  James E. Hall

    IPC分类号： C08F8/00 ,  C08C19/02 ,  C08F8/04

    CPC分类号： C08F8/04

    摘要： The composition described herein is a hydrogenated polymer derived from a butadiene diblock copolymer having 85-100%, preferably 95-100% 1,2-structure in one block and the other block comprising essentially 1,4-butadiene. The 1,2-block comprises at least 10%, preferably at least 25%, of the total weight of the diblock copolymer. The hydrogenated product is an elastomeric material which is oxidation-resistant and stable against ozone. Moreover, since the original polymer may be made by a method which permits control of the molecular weight, the molecular weight of the ultimate hydrogenated product is also controllable. The control of molecular weight and microstructure give highly desirable properties in the ultimate elastomeric product, and also control of tacticity and crystallinity.

    摘要翻译： 本文描述的组合物是衍生自在一个嵌段中具有85-100％，优选95-100％的1,2-结构的丁二烯二嵌段共聚物的氢化聚合物，另一个嵌段包含基本上1,4-丁二烯。 1,2-嵌段包含二嵌段共聚物总重量的至少10％，优选至少25％。 氢化产物是抗氧化和对臭氧稳定的弹性材料。 此外，由于原始聚合物可以通过允许控制分子量的方法制备，所以最终氢化产物的分子量也是可控的。 分子量和微结构的控制在最终的弹性体产品中提供非常理想的性能，并且还控制立体规整度和结晶度。