Components and catalysts for the polymerization of olefins
    41.
    发明授权
    Components and catalysts for the polymerization of olefins 失效
    用于烯烃聚合的组分和催化剂

    公开(公告)号:US5578541A

    公开(公告)日:1996-11-26

    申请号:US10750

    申请日:1993-01-29

    CPC分类号: C08F10/00

    摘要: The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond, and optionally an electron donor compound. The spherical solid components of the invention are characterized by porosity values higher than 1 cm.sup.3 /g and a pore size distribution such that at least 30% of their pores have an average radius greater than 10000 .ANG..

    摘要翻译: 本发明涉及用于烯烃聚合的催化剂的球形固体组分,其包含负载在活性形式的二卤化镁上,含有至少一个Ti-卤素键的钛化合物和任选的电子给体化合物。 本发明的球形固体组分的特征在于高于1cm 3 / g的孔隙度值和孔径分布,使得其孔的至少30%的平均半径大于10000Ag。

    Highly processable polymeric compositions based on LLDPE
    42.
    发明授权
    Highly processable polymeric compositions based on LLDPE 失效
    基于LLDPE的高度可加工的聚合物组合物

    公开(公告)号:US5561195A

    公开(公告)日:1996-10-01

    申请号:US376024

    申请日:1995-01-20

    摘要: Polymeric compositions based on Linear Low Density Polyethylene (LLDPE) comprising: (A) from 75 to 95% by weight of an ethylene copolymer with an .alpha.-olefin CH.sub.2 =CHR, wherein R is an alkyl radical having from 1 to 10 carbon atoms, and (B) from 5 to 25% by weight of a copolymer of propylene with ethylene and an .alpha.-olefin CH.sub.2 =CHR.sup.I, wherein R.sup.I is an alkyl radical having from 2 to 10 carbon atoms. Copolymer (B) is characterised by a relatively high insolubility in xylene. The polymeric compositions of the invention are endowed with improved processability and improved mechanical properties with respect to the LLDPE of the conventional type.

    摘要翻译: 基于线性低密度聚乙烯(LLDPE)的聚合物组合物包含:(A)75至95重量%的具有α-烯烃CH 2 = CHR的乙烯共聚物,其中R为具有1至10个碳原子的烷基, 和(B)5至25重量%的丙烯与乙烯和α-烯烃CH2 = CHRI的共聚物,其中RI是具有2至10个碳原子的烷基。 共聚物(B)的特征在于二甲苯中相对较高的不溶性。 本发明的聚合物组合物具有相对于常规类型的LLDPE的改进的加工性能和改善的机械性能。