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    • 3. 发明申请
    • HIGH-DENSITY POLYETHYLENE COMPOSITIONS, METHOD OF MAKING THE SAME, ARTICLES MADE THEREFROM, AND METHOD OF MAKING SUCH ARTICLES
    • 高密度聚乙烯组合物,其制备方法,制备方法和制备这些制品的方法
    • WO2007130515A3
    • 2008-03-13
    • PCT/US2007010735
    • 2007-05-02
    • DOW GLOBAL TECHNOLOGIES INCMICHIE WILLIAM JKAY THOMAS WWHITED STEPHANIE MELLEY-BRISTOW DALE MGILLESPIE DAVID THAZLITT LONNIE G
    • MICHIE WILLIAM JKAY THOMAS WWHITED STEPHANIE MELLEY-BRISTOW DALE MGILLESPIE DAVID THAZLITT LONNIE G
    • C08L23/04B65D41/00H01B3/44
    • C08L23/08C08L23/04C08L23/06C08L23/0815C08L2203/10Y10T428/24992Y10T428/273C08L2666/06
    • The instant invention is a high-density polyethylene composition, method of producing the same, articles made therefrom, and method of making such articles. The high- density polyethylene composition of the instant invention includes a first component, and a second component. The first component is a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.915 to 0.940 g/cm 3 , and a melt index (I 21.6 ) in the range of 0.5 to 10 g/10 minutes. The second component is a low molecular weight ethylene polymer having a density in the range of 0.965 to 0.980 g/cm 3 , and a melt index (I2) in the range of 50 to 1500 g/10 minutes. The high-density polyethylene composition has a melt index (I2) of at least 1, a density in the range of (I2) in the range of 0, 950 to 0,960g/cm 3 , and g' of equal or greater than 1. The method of producing a high-density polyethylene composition includes the following steps: (1) introducing ethylene, and one or more alpha-olefin comonomers into a first reactor; (2) (co)polymerizing the ethylene in the presence of one or more alpha-olefin comonomers in the first reactor thereby producing a first component, wherein the first component being a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.915 to 0.940 g/cm 3 , and a melt index (I 21.6 ) in the range of 0.5 to 10 g/10 minutes; (3) introducing the first component and additional ethylene into a second reactor; (4) polymerizing the additional ethylene in the second reactor thereby producing a second component, wherein the second component being a low molecular weight ethylene polymer having a density in the range of 0.965 to 0.980 g/cm 3 , and a melt index (I 2 ) in the range of 50 to 1500 g/10 minutes; and (5) thereby producing the high-density polyethylene composition, wherein the high-density polyethylene composition having a melt index (I 2 ) of at least 1, a density in the range of 0.950 to 0.960 g/cm 3 , and g' of equal or greater than 1. The articles according to instant invention comprise the above-described inventive high-density polyethylene composition, and such articles may be made via compression molding, injection molding, or injection blow molding.
    • 本发明是高密度聚乙烯组合物,其制造方法,由其制成的制品及其制造方法。 本发明的高密度聚乙烯组合物包括第一组分和第二组分。 第一组分是密度在0.915至0.940g / cm 3范围内的高分子量乙烯α-烯烃共聚物,熔体指数(I 21.6) 在0.5〜10g / 10分钟的范围内。 第二组分是密度在0.965至0.980g / cm 3范围内的低分子量乙烯聚合物,熔体指数(I 2)在50至1500g / 10分钟的范围内 。 高密度聚乙烯组合物的熔体指数(I 2)至少为1,在(I2)范围内的密度在0,950至0.96g / cm 3的范围内,g 等于或大于1.制备高密度聚乙烯组合物的方法包括以下步骤:(1)将乙烯和一种或多种α-烯烃共聚单体引入第一反应器; (2)(共)在第一反应器中在一种或多种α-烯烃共聚单体存在下聚合乙烯,从而产生第一组分,其中第一组分是密度在该范围内的高分子量乙烯α-烯烃共聚物 为0.915〜0.940g / cm 3,熔体指数(I <21.6℃)为0.5〜10g / 10分钟; (3)将第一组分和另外的乙烯引入第二反应器中; (4)在第二反应器中聚合另外的乙烯,从而产生第二组分,其中第二组分是密度在0.965至0.980g / cm 3范围内的低分子量乙烯聚合物, 和熔体指数(I 2 H 2)在50至1500g / 10分钟的范围内; 和(5),从而制备高密度聚乙烯组合物,其中熔体指数(I 2/2)至少为1的密度为0.950-0.960g的高密度聚乙烯组合物 / cm 3,g'等于或大于1.本发明的制品包含上述本发明的高密度聚乙烯组合物,并且这些制品可以通过压塑,注射 成型或注射吹塑。
    • 9. 发明专利
    • homopolímero ou copolímero de etileno e processo de polimerização com iniciação via radical livre
    • BRPI0516921B1
    • 2016-04-12
    • BRPI0516921
    • 2005-10-04
    • DOW GLOBAL TECHNOLOGIES INC
    • EDDY CHRISTOPHER RCONRAD CHRISTOPHER WGILLESPIE DAVID T
    • C08F10/00C08F10/02
    • homopolímero ou copolímero de etileno e processo de polimerização com iniciação via radicais livres. a presente invenção refere-se a um homopolímero ou copolímero de etileno caracterizado por ter ramificação de cadeia longa, e ter uma distribuição de peso molecular, mw/mn, e uma gpc-lalls cdf, que satisfaz a seguinte relação: y 0,0663x - 0,015, na qual y= gpc- lalls cdf e x= mw/mn medido por gpc convencional, uma linha traçada de onde o cromatograma de ls cruza com peso molecular 350.000 e peso molecular 1.150.000 ter uma inclinação positiva, preferivelmente com um índice de fusão entre 0,15 e 2000 g/10 minutos. além disso, a invenção refere-se a um processo de polimerização com iniciação via radicais livres para a preparação de polímeros ou copolímeros de etileno compreendendo reagir etileno e opcionalmente um ou mais comonômeros numa pressão elevada, convenientemente entre 13.000 psig e 100.000 psig, e em temperaturas de reator de 115 °c a 400 °c, preferivelmente 125-400 °c, mais preferivelmente 140-350 °c, especialmente 165-320 °c, num sistema de reatores compreendendo pelo menos um reator tubular, e pelo menos um reator autoclave, sendo que a alimentação de monômeros nos reatores é dividida em múltiplas correntes de alimentação de monômeros, e sendo que pelo menos uma corrente de alimentação de monômeros no reator tubular consiste essencialmente de monâmero não reagido.