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    • 5. 发明授权
    • Olefin (co)polymer composition
    • 烯烃(共)聚合物组成
    • US06235845B1
    • 2001-05-22
    • US09462249
    • 2000-01-05
    • Akira YamauchiJun SaitoHiroyuki MaeharaYuuichi Yamanaka
    • Akira YamauchiJun SaitoHiroyuki MaeharaYuuichi Yamanaka
    • C08L2302
    • C08L23/02C08L23/06C08L23/0815C08L23/10C08L2205/02C08L2666/04
    • An olefin (co)polymer composition of the present invention comprises 99 to 70 wt. % of olefin (co)polymer (I) and 1 to 30 wt. % of polyethylene-based polymer (II). The olefin (co)polymer (I) comprises 0.01 to 5.0 parts by weight of high molecular weight polyethylene (a) having an intrinsic viscosity &eegr;A measured in tetralin at 135° C. of 15 to 100 dl/g, which is an ethylene homopolymer or an ethylene-olefin copolymer comprising at least 50 wt. % of ethylene polymerization units, and 100 parts by weight of olefin (co)polymer (b) other than the high molecular weight polyethylene. The polyethylene-based polymer (II) has an intrinsic viscosity &eegr;II measured in tetralin at 135° C. of 0.10 to 10 dl/g, which is an ethylene homopolymer or an ethylene copolymer comprising at least 50 wt. % of ethylene polymerization units. Thus, the present invention provides a polypropylene-based olefin (co)polymer composition having excellent formability that is suitable for thermoforming such as vacuum forming and pressure forming, blow molding and foam molding, especially suitable for thermoforming.
    • 本发明的烯烃(共)聚合物组合物包含99至70wt。 %的烯烃(共)聚合物(I)和1至30wt。 %的聚乙烯类聚合物(II)。 烯烃(共)聚合物(I)包含0.01至5.0重量份在135℃下在四氢化萘中测量的特性粘度etaA为15至100dl / g的高分子量聚乙烯(a),其为乙烯均聚物 或包含至少50重量%的乙烯 - 烯烃共聚物。 %的乙烯聚合单元和100重量份的除了高分子量聚乙烯之外的烯烃(共)聚合物(b)。 聚乙烯基聚合物(II)在135℃的四氢化萘中测得的特性粘度等于0.10-10dl / g,其为乙烯均聚物或乙烯共聚物,其包含至少50wt。 %的乙烯聚合单元。 因此,本发明提供了一种具有优异成形性的聚丙烯基烯烃(共)聚合物组合物,其适用于诸如真空成型和压力成形,吹塑和泡沫模塑之类的热成型,特别适用于热成型。
    • 6. 发明授权
    • Polypropylene composition and process for producing the same
    • 聚丙烯组合物及其制备方法
    • US06271310B1
    • 2001-08-07
    • US09402998
    • 1999-10-15
    • Chikashi OkayamaTakanori NakashimaAkira YamauchiJun SaitoMichitaka Sasaki
    • Chikashi OkayamaTakanori NakashimaAkira YamauchiJun SaitoMichitaka Sasaki
    • C08F800
    • C08L23/10C08L23/02C08L23/0815C08L23/12C08L23/16C08L2666/04
    • A polypropylene composition which contains 0.01 to 5 parts by weight of an olefin (co)polymer (a) having an intrinsic viscosity of 15 to 100 dl/g, 100 parts by weight of a propylene homopolymer (b) having an intrinsic viscosity of 0.2 to 10 dl/g, and 28 to 300 parts by weight of an ethylene/propylene copolymer (c) having an intrinsic viscosity of 0.2 to 10 dl/g, and in which the ratio of the melt flow rate of the homopolymer (b) to that of the copolymer (c), MFRPP/MFRRC, is 0.3 to 4 and the product of the ratio of the intrinsic viscosity of the copolymer (c) to that of the homopolymer (b), [&eegr;]RC/[&eegr;]PP, and the weight ratio of the amount of the homopolymer (b) to that of the copolymer (c), WPP/WRC, is in the range of from 0.2 to 3.0. The composition has high melt tension, high crystallization temperature, and excellent thermal stability, and yields a molded article having excellent transparency, reduced molding shrinkage, and excellent resistance to whitening by impact or bending.
    • 含有0.01〜5重量份特性粘度为15〜100dl / g的烯烃(共)聚合物(a),100重量份特性粘度为0.2的丙烯均聚物(b)的聚丙烯组合物 至10dl / g,和28-300重量份特性粘度为0.2-10dl / g的乙烯/丙烯共聚物(c),其中均聚物(b)的熔体流动速率 共聚物(c)的MFRPP / MFRRC为0.3〜4,共聚物(c)的特性粘度与均聚物(b)的特性粘度的比,ηRC /η PP,均聚物(b)与共聚物(c)的重量比WPP / WRC的重量比在0.2〜3.0的范围内。 该组合物具有高熔体张力,高结晶温度和优异的热稳定性,并且得到具有优异的透明性,降低的成型收缩率和通过冲击或弯曲而具有优异的抗白化性能的模制品。