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    • 3. 发明授权
    • Process for preparing a polymer using lithium initiator prepared by in
situ preparation
    • 通过原位制备制备使用锂引发剂的聚合物的方法
    • US5625017A
    • 1997-04-29
    • US531975
    • 1995-09-21
    • Koichi MoritaAtsushi NakayamaYoichi OzawaRyota Fujio
    • Koichi MoritaAtsushi NakayamaYoichi OzawaRyota Fujio
    • C08F2/06C08F4/48C08F36/04C08F4/08
    • C08F36/04
    • A process for preparing a polymer comprises polymerizing a conjugated diene monomer and/or a vinylaromatic hydrocarbon monomer in a hydrocarbon solvent in the presence of or in the absence of a randomizer by using a lithium polymerization initiator which is formed by bringing an organolithium compound and at least one secondary amine compound into contact with each other in the polymerization system in the presence of at least said monomer, wherein the polymerization conversion at the time of contact is less than 5%. The secondary amine is an amine compound having two hydrocarbon groups bonded to N or an imine compound in which an NH group and a saturated or unsaturated cyclic structure group form a cyclic structure. The cyclic structure group comprises a hydrocarbon group as the ring member and may also comprise N or O. The method of production uses the initiator which does not require separate preparation of the initiator, shows excellent reproducibility, allows for the evaluation of accuracy of concentration and realizes high effective initiator concentration. The high molecular weight polymer produced by the method has a narrow molecular weight distribution; is controllable; has a highly reproducible molecular weight and microstructure; exhibits excellent coupling properties based on the living polymerization and provides low hysteresis loss properties.
    • 制备聚合物的方法包括在烃溶剂中,在无规脱硫剂的存在下或在不存在无规化剂的情况下,通过使用通过使有机锂化合物形成的锂聚合引发剂和在有机锂化合物中形成的聚合引发剂来聚合共轭二烯单体和/ 至少一种仲胺化合物在至少所述单体的存在下在聚合体系中彼此接触,其中接触时的聚合转化率小于5%。 仲胺是具有与N键合的两个烃基或其中NH基和饱和或不饱和的环状结构基团形成环状结构的亚胺化合物的胺化合物。 环状结构基包括作为环成员的烃基,也可以包含N或O.生产方法使用不需要分离制备引发剂的引发剂,显示出优异的再现性,允许评价浓度的精确度和 实现高效引发剂浓度。 通过该方法制备的高分子量聚合物具有窄的分子量分布; 是可控的 具有高度可重复的分子量和微观结构; 基于活性聚合表现出优异的偶联性能,并提供低滞后损失性能。