Preparation of a low polydisperse polymer
    2.
    发明授权
    Preparation of a low polydisperse polymer 失效
    低分散聚合物的制备

    公开(公告)号:US5464914A

    公开(公告)日:1995-11-07

    申请号:US268212

    申请日:1994-06-29

    CPC分类号: C08F297/042 C08F36/04

    摘要: A liquid hydrocarbon soluble difunctional organolithium initiator (DFI) is reacted with an anionically polymerizable monomer, such as isoprene or 1,3-butadiene, in the presence of a diamine or a triamine to form a polymer having low polydispersity and high tensile strength. The DFI is prepared by reacting a dialkenylarylene compound with an alkyllithium in a nonpolar solvent and in the presence of sufficient quantities of a trisubstituted amine to prevent precipitation of the DFI in the solvent.

    摘要翻译: 在二胺或三胺的存在下,将液体烃溶性双官能有机锂引发剂(DFI)与阴离子聚合性单体如异戊二烯或1,3-丁二烯反应,形成低分散性和高拉伸强度的聚合物。 DFI通过在非极性溶剂中和在足够量的三取代胺存在下使二烯基芳基化合物与烷基锂反应来制备,以防止DFI在溶剂中沉淀。

    Preparation of conjugated diene-monoalkenyl arene block copolymers
having a low polydispersity index
    3.
    发明授权
    Preparation of conjugated diene-monoalkenyl arene block copolymers having a low polydispersity index 失效
    具有低多分散指数的共轭二烯 - 单烯基芳烃嵌段共聚物的制备

    公开(公告)号:US5462994A

    公开(公告)日:1995-10-31

    申请号:US187583

    申请日:1994-01-27

    IPC分类号: C08F297/04

    CPC分类号: C08F297/046

    摘要: The invention is a process for the preparation of a block copolymer which corresponds to the formula ABA wherein A comprises units derived from one or more monoalkenyl arenes; and B comprises units derived from one or more conjugated dienes and the residuum of a difunctional initiator; wherein the process comprises:I) contacting (a) a difunctional initiator capable of initiating the polymerization of a compound containing a double bond with (b) a portion of conjugated diene in a portion of hydrocarbon solvent under conditions such that the conjugated diene polymerizes to a degree of polymerization of 30 or greater;II) contacting with the polymerization mixture of I additional conjugated diene and hydrocarbon solvent under conditions such that the added conjugated diene polymerizes; andIII) contacting with the polymerization mixture of II a monoalkenyl arene to prepare a block copolymer having a number average molecular weight of about 31,500 to about 400,000 and an average weight percent of monoalkenyl arenes contained in the block copolymer of from about 5 percent to about 50 weight percent under conditions such that the monoalkenyl arene polymerizes.In another embodiment, the invention relates to the polymers prepared from this process. Such products demonstrate high tensile strength, a low polydispersity index and do not require the use of a co-initiator to achieve such properties.

    摘要翻译: 本发明是制备对应于式ABA的嵌段共聚物的方法,其中A包含衍生自一个或多个单烯基芳烃的单元; 并且B包含衍生自一种或多种共轭二烯的单元和双官能引发剂的残余物; 其中所述方法包括:(a)在烃溶剂的一部分中使(a)能够引发含有双键的化合物与(b)一部分共轭二烯的双官能引发剂,使得共轭二烯聚合成 聚合度30以上; II)在添加的共轭二烯聚合的条件下与I另外的共轭二烯和烃溶剂的聚合混合物接触; 和III)与II的单烯基芳烃的聚合混合物接触以制备数均分子量为约31,500至约400,000的嵌段共聚物,并且嵌段共聚物中所含的单烯基芳烃的平均重量百分比为约5%至约 在单烯基芳烃聚合的条件下为50重量%。 在另一个实施方案中,本发明涉及由该方法制备的聚合物。 这些产品显示出高拉伸强度,低分散指数,并且不需要使用共引发剂来实现这种性质。