Abstract:
Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.
Abstract:
The instant invention provides a polyolefin composition suitable for packaging applications, films, multilayer structures and packaging devices made therefrom. The polyolefin composition according to the present invention comprises: an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm3, a melt index (I2) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction, and wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm3, a melt index (I2) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (Mw/Mn) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 6 to 43.
Abstract:
The instant invention provides a polyolefin composition suitable for injection molding applications, and method of making such injection molded articles. The polyolefin composition suitable for injection molding applications comprises: an ethylene/α-olefin interpolymer composition comprising: (a) from 25 to 50 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of from 0.924 to 0.937 g/cm3, a melt index (I2) in the range of from 0.03 to 0.3 g/10 min, (b) from 50 to 75 percent by weight of a second ethylene homopolymer fraction having a density in the range of from greater than 0.960 g/cm3, a melt index (I2) in the range of from 100 to 180 g/10 minutes, wherein said ethylene/α-olefin interpolymer composition has a density in the range of from 0.950 to 0.958 g/cm3, a melt index (I2) in the range of from 1.0 g/10 min to 3.5 g/10 min, a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.5, a molecular weight distribution (Mw/Mn) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 9 to 50.
Abstract translation:本发明提供了适用于注塑应用的聚烯烃组合物,以及制备这种注模制品的方法。 适用于注塑应用的聚烯烃组合物包括:乙烯/α-烯烃互聚物组合物,其包含:(a)25至50重量%的第一乙烯/α-烯烃共聚物部分,其密度范围为0.924至 0.937g / cm 3,熔体指数(I 2)在0.03至0.3g / 10min的范围内,(b)50至75重量%的第二乙烯均聚物部分,其密度在大于 0.960g / cm 3,熔体指数(I 2)在100至180g / 10分钟的范围内,其中所述乙烯/α-烯烃互聚物组合物的密度范围为0.950至0.958g / cm 3,熔体 指数(I 2)在1.0g / 10min至3.5g / 10min的范围内,零剪切粘度比(ZSVR)在1.01至2.5范围内,分子量分布(Mw / Mn)在该范围内 为2.0〜4.0,tanδ为0.1弧度/秒,190℃为9〜50。
Abstract:
The instant invention provides a polyolefin composition suitable for injection molding applications, and method of making such injection molded articles. The polyolefin composition suitable for injection molding applications comprises: an ethylene/α-olefin interpolymer composition comprising: (a) from 25 to 50 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of from 0.924 to 0.937 g/cm3, a melt index (I2) in the range of from 0.03 to 0.3 g/10 min, (b) from 50 to 75 percent by weight of a second ethylene homopolymer fraction having a density in the range of from greater than 0.960 g/cm3, a melt index (I2) in the range of from 100 to 180 g/10 minutes, wherein said ethylene/α-olefin interpolymer composition has a density in the range of from 0.950 to 0.958 g/cm3, a melt index (I2) in the range of from 1.0 g/10 min to 3.5 g/10 min, a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.5, a molecular weight distribution (Mw/Mn) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 9 to 50.
Abstract translation:本发明提供了适用于注塑应用的聚烯烃组合物,以及制备这种注模制品的方法。 适用于注塑应用的聚烯烃组合物包括:乙烯/α-烯烃互聚物组合物,其包含:(a)25至50重量%的第一乙烯/α-烯烃共聚物部分,其密度范围为0.924至 0.937g / cm 3,熔体指数(I 2)在0.03至0.3g / 10min的范围内,(b)50至75重量%的第二乙烯均聚物部分,其密度在大于 0.960g / cm 3,熔体指数(I 2)在100至180g / 10分钟的范围内,其中所述乙烯/α-烯烃互聚物组合物的密度范围为0.950至0.958g / cm 3,熔体 指数(I 2)在1.0g / 10min至3.5g / 10min的范围内,零剪切粘度比(ZSVR)在1.01至2.5范围内,分子量分布(Mw / Mn)在该范围内 为2.0〜4.0,tanδ为0.1弧度/秒,190℃为9〜50。
Abstract:
Embodiments of this disclosure includes processes of polymerizing a multi-modal polyethylene polymer. The process includes contacting ethylene and optionally one or more α-olefin monomers with at least two catalyst systems in a solution reactor at a reactor temperature of greater than 150° C. The at least two catalyst systems produce a vinyl end group count per 1000 carbon atoms is greater than 0.3. A first catalyst system of the at least two catalyst systems includes a first procatalyst; and a second catalyst system of the at least two catalyst systems comprises a second procatalyst having a reactivity ratio of less than 20, wherein the reactivity ratio of the first procatalyst is measured in a single reactor with only the first catalyst system in the presence of 1250 grams of ISOPAR-E, with a mol fraction of ethylene in solution of 0.709, and at a reactor temperature of at least 150° C.
Abstract:
Embodiments of the present application are directed to supported catalyst systems that include a metal-ligand complex having the structure of formula (I).
Abstract:
A bimodal ethylene-based polymer, including a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C., an I10/I2 ratio from 5.5 to 7.5, wherein I2 is the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and I10 is the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C., and a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height.
Abstract:
Embodiments of the present application are directed to procatalysts, and catalyst systems including procatalysts, including a metal-ligand complex having the structure of formula (I): [Formula I]
Abstract:
Processes of polymerizing olefin monomers. The process comprising reacting ethylene and optionally one or more olefin monomers in the presence of a catalyst system, wherein the catalyst system comprises: an activator; hydrocarbyl-modified methylaluminoxane having less than 25 mole percent trihydrocarbyl aluminum compounds AlRA1RB1RC1 based on the total moles of aluminum, where RA1, RB1, and RC1 are independently linear (C1-C40)alkyl, branched (C1-C40)alkyl, or (C6-C40)aryl; and one or more metal-ligand complexes according to formula (1):
Abstract:
Embodiments of the present application are directed to procatalysts, and catalyst systems including procatalysts, including a metal-ligand complex having the structure of formula (I):