Thermoplastic elastomers
    2.
    发明授权
    Thermoplastic elastomers 失效
    热塑性弹性体

    公开(公告)号:US4600749A

    公开(公告)日:1986-07-15

    申请号:US348335

    申请日:1982-02-12

    IPC分类号: C08F2/00 C08F297/04 C08L53/02

    CPC分类号: C08L53/02 C08F297/044

    摘要: Thermoplastic elastomers of conjugated diolefins having 4 to 6 carbon atoms and monovinyl aromatic hydrocarbons are prepared by polymerizing 8 to 65 parts by weight of a monomer mixture A.sub.1 comprising a conjugated diolefin having 4 to 6 carbon atoms and a monovinyl aromatic hydrocarbon in a weight ratio of 85-10:15-90 in a hydrocarbon solvent and an inert atmosphere in the presence of 0.2 to 20 mmol., per 100 g. of the total amount of the mixture A.sub.1 and the mixture A.sub.2 described below, of a monolithium hydrocarbon calculated as active lithium to form an active copolymer, and after substantial completion of the polymerization, copolymerizing said active copolymer with 92 to 35 parts by weight of a monomer mixture A.sub.2 comprising the same conjugated diolefin having 4 to 6 carbon atoms and monovinyl aromatic hydrocarbon as said mixture A.sub.1 in a weight ratio of 95-20:5-80, such that the total amount of said mixtures A.sub.1 and A.sub.2 is 100 parts by weight, to thereby obtain a final copolymer having a monovinyl aromatic content of 10 to 70% by weight based on the total amount of said mixtures A.sub.1 and A.sub.2. The thus obtained thermoplastic elastomers have at least four polymeric blocks, and are comparable in elastic property to conventional thermoplastic elastomers and excellent in thermal resistance, resistance to oils and processability. Further, said thermoplastic elastomer does not require vulcanization or chemical cross-linking, and can be molded into an article having an excellent shape maintenance property.

    摘要翻译: 通过将8至65重量份的包含具有4-6个碳原子的共轭二烯烃和单乙烯基芳族烃的单体混合物A1与重量比为1的聚合,制备具有4至6个碳原子的共轭二烯烃和单乙烯基芳族烃的热塑性弹性体 85-10:15-90在烃溶剂和惰性气氛中,每100克存在0.2-20mmol。 的混合物A1和下述混合物A2的总量的单轴烃作为活性锂计算以形成活性共聚物,并且在基本上完成聚合之后,将所述活性共聚物与92〜35重量份的 单体混合物A2,其包含具有4至6个碳原子的相同的共轭二烯烃和作为所述混合物A1的单乙烯基芳烃,重量比为95-20:5-80,使得所述混合物A1和A2的总量为100份 重量,从而获得基于所述混合物A1和A2的总量,单乙烯基芳族化合物含量为10至70重量%的最终共聚物。 由此获得的热塑性弹性体具有至少四个聚合物嵌段,并且在弹性方面与常规热塑性弹性体相当,并且耐热性,耐油性和加工性优异。 此外,所述热塑性弹性体不需要硫化或化学交联,并且可以模塑成具有优异形状维持性的制品。

    Preparation of hexamethyleneimine
    3.
    发明授权
    Preparation of hexamethyleneimine 失效
    六亚甲基亚胺的制备

    公开(公告)号:US4290946A

    公开(公告)日:1981-09-22

    申请号:US598914

    申请日:1975-07-24

    IPC分类号: C07D295/023 C07D295/02

    CPC分类号: C07D295/023

    摘要: A process for preparing hexamethyleneimine from hexamethylenediamine, which comprises continuously reacting hexamethylenediamine at about 70 to 180.degree. C. in an inert solvent using a nickel catalyst and/or cobalt catalyst while maintaining the concentrations of hexamethyleneimine and hexamethylenediamine in the reaction mixture at 10% by weight or less and 25% by weight or less, respectively, by removing the hexamethyleneimine from the reaction system as soon as the hexamethyleneimine is formed.

    摘要翻译: 由六亚甲基二胺制备六亚甲基亚胺的方法,该方法包括使用镍催化剂和/或钴催化剂在惰性溶剂中在约70至180℃下使六亚甲基二胺连续反应,同时将反应混合物中六亚甲基亚胺和六亚甲基二胺的浓度保持在10% 重量以下且25重量%以下,通过一旦形成六亚甲基亚胺就从反应体系中除去六亚甲基亚胺。