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    • 2. 发明申请
    • POLYETHYLENE COMPOSITIONS, METHOD OF PRODUCING THE SAME, FIBERS MADE THEREFROM, AND METHOD OF MAKING THE SAME
    • 聚乙烯组合物,其制造方法,其制造的纤维及其制造方法
    • WO2010006097A1
    • 2010-01-14
    • PCT/US2009/050003
    • 2009-07-09
    • DOW GLOBAL TECHNOLOGIES INC.PEPPER, Randy, E.KAPUR, MridulaCLAASEN, Gert, J.KNICKERBOCKER, Edward, N.WIKER, Nathan, J.MICHIE, William, J., Jr.DAVIS, Mark, B.
    • PEPPER, Randy, E.KAPUR, MridulaCLAASEN, Gert, J.KNICKERBOCKER, Edward, N.WIKER, Nathan, J.MICHIE, William, J., Jr.DAVIS, Mark, B.
    • C08L23/04D01F6/04D01F6/46D04H1/00
    • D01F6/30C08F210/02C08L23/04C08L23/0815C08L2205/02C08L2205/16C08L2314/06D01D5/08D01D5/10D01D5/12D01D10/02D01F6/04D04H1/56D04H3/007D04H3/16Y10T428/249921Y10T442/30Y10T442/3976Y10T442/60C08L2666/06
    • The instant invention is a polyethylene composition, method of producing the same, fibers made therefrom, and method of making the same. The polyethylene composition according to instant invention comprises: (a) less than or equal to 100 percent by weight of the units derived from ethylene; and (b) less than 20 percent by weight of units derived from one or more α-olefin comonomers. The polyethylene composition according to instant invention has a density in the range of 0.920 to 0.970 g/cm 3 , a molecular weight distribution (M w /M n ) in the range of 1.70 to 3.5, a melt index (I 2 ) in the range of 0.2 to 1000 g/10 minutes, a molecular weight distribution (M z /M w ) in the range of less than 2.5, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the composition. The process for producing the inventive polyethylene composition comprises the steps of: (1) (co)polymerizing ethylene and optionally one or more α- olefin comonomers in the presence of a hafnium based metallocene catalyst via a gas phase (co)polymerization process in a single stage reactor; and (2) thereby producing the polyethylene composition having a density in the range of 0.920 to 0.970 g/cm3, a molecular weight distribution (M w /M n ) in the range of 1.70 to 3.5, a melt index (I 2 ) in the range of 0.2 to 1000 g/10 minutes, a molecular weight distribution (M z /M w ) in the range of less than 2.5, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the composition. The fibers according to the instant invention comprise a polyethylene composition comprising: (a) less than or equal to 100 percent by weight of the units derived from ethylene; and (b) less than 20 percent by weight of units derived from one or more α-olefin comonomers; wherein the polyethylene composition has a density in the range of 0.920 to 0.970 g/cm 3 , a molecular weight distribution (M w/ M n ) in the range of 1.70 to 3.5, a melt index (I 2 ) in the range of 0.2 to 1000 g/10 minutes, a molecular weight distribution (M z /M w ) in the range of less than 2.5, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the composition. The process for making a fiber according to instant invention comprises the steps of: (1) selecting a polyethylene composition comprising: (a) less than or equal to 100 percent by weight of the units derived from ethylene; and (b) less than 20 percent by weight of units derived from one or more α-olefin comonomers; wherein the polyethylene composition has a density in the range of 0.920 to 0.970 g/cm 3, a molecular weight distribution (M w /M n ) in the range of 1.70 to 3.5, a melt index (I 2 ) in the range of 0.2 to 1000 g/10 minutes, a molecular weight distribution (M z/ M w ) in the range of less than 2.5, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the composition; (2) spinning the polyethylene composition into a fiber; and (3) thereby forming the fiber.
    • 本发明是聚乙烯组合物,其制造方法,由其制成的纤维及其制造方法。 根据本发明的聚乙烯组合物包含:(a)小于或等于100重量%的衍生自乙烯的单元; 和(b)少于20重量%的衍生自一种或多种α-烯烃共聚单体的单元。 本发明的聚乙烯组合物的密度范围为0.920〜0.970g / cm3,分子量分布(Mw / Mn)为1.70〜3.5,熔体指数(I2)为0.2〜 1000g / 10分钟,小于2.5的分子量分布(Mz / Mw),存在于组合物主链中的每1000个碳原子的乙烯基不饱和度小于0.1个乙烯基。 制备本发明的聚乙烯组合物的方法包括以下步骤:(1)在铪基金属茂催化剂存在下,通过气相(共)聚合方法在(a)共聚物中共聚合乙烯和任选的一种或多种α-烯烃共聚单体 单级反应器; 和(2)由此制备密度在0.920至0.970g / cm3范围内的聚乙烯组合物,分子量分布(Mw / Mn)在1.70至3.5的范围内,熔体指数(I2)在 0.2至1000g / 10分钟,小于2.5的分子量分布(Mz / Mw),存在于组合物主链中的每1000个碳原子的乙烯基不饱和度小于0.1个乙烯基。 根据本发明的纤维包含聚乙烯组合物,其包含:(a)小于或等于100重量%的衍生自乙烯的单元; 和(b)少于20重量%的衍生自一种或多种α-烯烃共聚单体的单元; 其中,所述聚乙烯组合物的密度为0.920〜0.970g / cm 3,分子量分布(Mw / Mn)为1.70〜3.5,熔体指数(I2)为0.2〜1000g / 10分钟,小于2.5的范围内的分子量分布(Mz / Mw),存在于组合物的骨架中的每1000个碳原子的乙烯基不饱和度小于0.1个乙烯基。 根据本发明的制备纤维的方法包括以下步骤:(1)选择聚乙烯组合物,其包含:(a)小于或等于100重量%的衍生自乙烯的单元; 和(b)少于20重量%的衍生自一种或多种α-烯烃共聚单体的单元; 其中,所述聚乙烯组合物的密度为0.920〜0.970g / cm 3,分子量分布(Mw / Mn)为1.70〜3.5,熔体指数(I2)为0.2〜1000g / 10分钟,小于2.5的范围内的分子量分布(Mz / Mw),存在于组合物的骨架中的每1000个碳原子的乙烯基不饱和度小于0.1个乙烯基; (2)将聚乙烯组合物纺丝成纤维; 和(3)从而形成纤维。