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    • 3. 发明申请
    • POLYOLEFIN COMPOSITIONS HAVING HIGH FLUIDITY
    • 具有高流动性的聚烯烃组合物
    • WO2003076508A1
    • 2003-09-18
    • PCT/EP2003/002299
    • 2003-03-05
    • BASELL POLIOLEFINE ITALIA S.P.A.PELLICONI, AnteoANGELINI, Antonella
    • PELLICONI, AnteoANGELINI, Antonella
    • C08L23/10
    • C08L23/16C08L23/142C08L2205/02C08L2308/00C08L2666/06
    • A polyolefin composition suitable for preparing films and sheets, comprising: (A) from 15 to 40 % by weight of a crystalline copolymer of propylene with at least one alpha-olefin of formula H 2 C=CHR 1 , where R 1 is H or a C 2-8 linear or branched alkyl, containing at least 90 % by weight of propylene, having solubility in xylene at room temperature lower than 15% by weight; (B) from 60 to 85 % by weight of an elastomeric fraction comprising: (1) a copolymer of propylene with ethylene, optionally containing 0.5 to 5 % by weight of a diene, containing from 20 to 35% by weight ethylene, and having solubility in xylene at room temperature greater than 45% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 1.0 to 3.9 dl/g; and (2) a copolymer of ethylene with at least one alpha-olefin of formula H 2 C=CHR 2 , where R 2 is a C 2-8 linear or branched alkyl, optionally containing 0.5 to 5 % by weight of a diene, containing 15 % to 40 % by weight alpha-olefin, and having solubility in xylene at room temperature greater than 35% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 1.0 to 3.0 dl/g; the (1)/(2) weight ratio ranging from 1:5 to 5:1. The polyolefin composition of the invention, preferably prepared by sequential polymerization in at least three stages, has a flexural modulus lower than 130 Mpa, shore D hardness lower than 40, and MFR ≥ 1.5 g/10min.
    • 一种适于制备薄膜和片材的聚烯烃组合物,其包含:(A)15至40重量%的丙烯与至少一种式IIC = CHR1的α-烯烃的结晶共聚物,其中R 1为H或C 2-8 含有至少90重量%丙烯的直链或支链烷基,其在室温下在二甲苯中的溶解度低于15重量%; (B)60至85重量%的弹性体级分,其包含:(1)丙烯与乙烯的共聚物,任选含有0.5至5重量%的二烯,其含有20至35重量%的乙烯,并且具有 室温下在二甲苯中的溶解度大于45重量%,二甲苯可溶组分的特性粘度为1.0至3.9dl / g; 和(2)乙烯与至少一种式H2C = CHR2的α-烯烃的共聚物,其中R2是C2-8直链或支链烷基,任选含有0.5至5重量%的二烯,含有15至40 重量%的α-烯烃,并且在室温下在二甲苯中的溶解度大于35重量%,二甲苯可溶部分的特性粘度为1.0-3.0dl / g; (1)/(2)重量比为1:5至5:1。 优选通过在至少三个阶段中顺序聚合制备的本发明的聚烯烃组合物具有低于130Mpa的弯曲模量,肖氏D硬度低于40,MFR> = 1.5g / 10min。