会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明公开
    • Poly-diisopropenyl benzene synthesis
    • 聚对二苯乙烯合成
    • EP0128851A3
    • 1986-07-02
    • EP84630074
    • 1984-05-04
    • THE GOODYEAR TIRE & RUBBER COMPANY
    • Jalics, George
    • C08F12/34C08F02/06
    • C08F12/34
    • It has been unexpectedly found that meta-diisopropenyl benzene can be polymerized into poly-m-diisopropenyl benzene with a relatively narrow molecular weight distribution and with only a small degree of crosslinking (gel formation) if done in the presence of at least one alpha-olefin containing from 2 to 12 carbon atoms in tetrahydrofuran (solvent) at low temperatures employing an alkyl lithium initiator. The poly-m-diisopropenyl benzene produced by employing this technique has an isopropenyl moiety on almost every diisopropenyl benzene repeat unit in the polymer. This polymer is particularly useful since its pendant isopropenyl groups can be further reacted with other compounds leading to polymers with various functionalities. This technique can also be employed in the synthesis of copolymers containing repeat units derived from meta-diisopropenyl benzene and one or more other monomers. The copolymers synthesized using the process of this invention contain an essentially quantitative number of unreacted isopropenyl groups on the meta-diisopropenyl benzene repeat units in the polymer chain.
    • 6. 发明公开
    • Poly-diisopropenyl benzene synthesis
    • 聚二异丙烯基苯的合成
    • EP0128851A2
    • 1984-12-19
    • EP84630074.7
    • 1984-05-04
    • THE GOODYEAR TIRE & RUBBER COMPANY
    • Jalics, George
    • C08F12/34C08F2/06
    • C08F12/34
    • It has been unexpectedly found that meta-diisopropenyl benzene can be polymerized into poly-m-diisopropenyl benzene with a relatively narrow molecular weight distribution and with only a small degree of crosslinking (gel formation) if done in the presence of at least one alpha-olefin containing from 2 to 12 carbon atoms in tetrahydrofuran (solvent) at low temperatures employing an alkyl lithium initiator. The poly-m-diisopropenyl benzene produced by employing this technique has an isopropenyl moiety on almost every diisopropenyl benzene repeat unit in the polymer. This polymer is particularly useful since its pendant isopropenyl groups can be further reacted with other compounds leading to polymers with various functionalities.
      This technique can also be employed in the synthesis of copolymers containing repeat units derived from meta-diisopropenyl benzene and one or more other monomers. The copolymers synthesized using the process of this invention contain an essentially quantitative number of unreacted isopropenyl groups on the meta-diisopropenyl benzene repeat units in the polymer chain.
    • 出乎意料地发现,如果在至少一种α-烯烃存在下进行,则间二异丙烯基苯可聚合成具有相对窄的分子量分布且仅具有小程度的交联(凝胶形成)的聚间二异丙烯基苯, 使用烷基锂引发剂在低温下在四氢呋喃(溶剂)中含有2至12个碳原子的烯烃。 采用该技术生产的聚间二异丙烯基苯在聚合物中的几乎每个二异丙烯基苯重复单元上都具有异丙烯基部分。 这种聚合物是特别有用的,因为其悬挂的异丙烯基可以进一步与其他化合物反应,产生具有各种官能度的聚合物。 该技术也可用于合成含有衍生自间二异丙烯基苯和一种或多种其它单体的重复单元的共聚物。 使用本发明方法合成的共聚物在聚合物链中的间二异丙烯基苯重复单元上含有基本定量数量的未反应的异丙烯基。