公开(公告)号：US20050256271A1

公开(公告)日：2005-11-17

申请号：US11186185

申请日：2005-07-21

申请人： Arnold Lustiger ,  David Lohse ,  Blair Graham ,  Barry Trudell

发明人： Arnold Lustiger ,  David Lohse ,  Blair Graham ,  Barry Trudell

IPC分类号： C08L23/08 ,  C08L23/00

CPC分类号： C08L23/06 ,  C08L23/08 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2314/02 ,  C08L2666/06

摘要： Polyethylene blend compositions suitable for injection molding, injection molded articles, and processes for injection molding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.1 to 3.0 g/10 min and a density of from 0.905 to 0.938 g/cm3; and a second polyethylene having a melt index of 10 to 500 g/10 min and a density of 0.945 to 0.975 g/cm3. The compositions have a density of from 0.920 to 0.973 g/cm3 and a melt index of 2 to 200 g/10 min, and the density of the second polyethylene is from 0.037 to 0.062 g/cm3 greater than the density of the first polyethylene. The compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance, relative to conventional compositions of similar melt index and density. In certain embodiments, the compositions, and articles produced therefrom, also exhibit an improved balance of toughness properties and processability properties.

摘要翻译： 提供适用于注射成型的聚乙烯共混组合物，注模制品和注射成型制品的方法。 聚乙烯组合物包括熔体指数为0.1至3.0g / 10min，密度为0.905至0.938g / cm 3的第一聚乙烯; 和熔体指数为10〜500g / 10min，密度为0.945〜0.975g / cm 3的第二聚乙烯。 组合物的密度为0.920至0.973g / cm 3，熔体指数为2至200g / 10min，第二聚乙烯的密度为0.037至0.062g / SUP> 3 大于第一聚乙烯的密度。 相对于具有类似熔体指数和密度的常规组合物，组合物表现出改善的物理性能，例如环境应力开裂性。 在某些实施方案中，组合物和由其制备的制品也显示出韧性和加工性能的改善的平衡。

公开(公告)号：US20050215719A1

公开(公告)日：2005-09-29

申请号：US11078320

申请日：2005-03-14

申请人： Arnold Lustiger ,  David Lohse ,  Blair Graham

发明人： Arnold Lustiger ,  David Lohse ,  Blair Graham

IPC分类号： C08L23/08 ,  C08L23/00

CPC分类号： C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2314/06 ,  Y10T428/1352 ,  Y10T428/1386 ,  Y10T428/31938 ,  C08L2666/06

摘要： Polyethylene blend compositions suitable for rotomolding, rotomolded articles, and processes for rotomolding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm3; and a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm3. The composition has a density of from 0.930 to 0.955 g/cm3 and a melt index of 1.5 to 12 g/10 min, and the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm3. These compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance and Izod Impact Strength.

摘要翻译： 提供适合于滚塑的聚乙烯共混组合物，滚塑制品和滚塑制品的方法。 聚乙烯组合物包括熔体指数为0.4-3.0g / 10min，密度为0.910-0.930g / cm 3的第一聚乙烯; 和熔体指数为10〜30g / 10min，密度为0.945〜0.975g / cm 3的第二聚乙烯。 该组合物的密度为0.930至0.955g / cm 3，熔体指数为1.5至12g / 10min，第一和第二聚乙烯的密度在0.030至0.048g / cm 3。 这些组合物表现出改善的物理性能，例如环境应力开裂抗力和艾佐德冲击强度。

公开(公告)号：US20050256266A1

公开(公告)日：2005-11-17

申请号：US11186443

申请日：2005-07-21

申请人： Arnold Lustiger ,  David Lohse ,  Blair Graham ,  Ronald Cooke

发明人： Arnold Lustiger ,  David Lohse ,  Blair Graham ,  Ronald Cooke

IPC分类号： C08F8/00 ,  C08L23/06 ,  C08L23/08

CPC分类号： B29C41/04 ,  B29C41/003 ,  C08L23/06 ,  C08L23/08 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2314/02 ,  C08L2666/06

摘要： Polyethylene blend compositions suitable for rotomolding, rotomolded articles, and processes for rotomolding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm3; and a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm3. The composition has a density of from 0.930 to 0.955 g/cm3 and a melt index of 1.5 to 12 g/10 min, and the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm3. These compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance and Izod Impact Strength. Articles produced from the compositions may also exhibit improved impact resistance properties, enhanced ductile break properties, and improved deflection resistance, which represents a combination of creep and fatigue resistance.

摘要翻译： 提供适合于滚塑的聚乙烯共混组合物，滚塑制品和滚塑制品的方法。 聚乙烯组合物包括熔体指数为0.4-3.0g / 10min，密度为0.910-0.930g / cm 3的第一聚乙烯; 和熔体指数为10〜30g / 10min，密度为0.945〜0.975g / cm 3的第二聚乙烯。 该组合物的密度为0.930至0.955g / cm 3，熔体指数为1.5至12g / 10min，第一和第二聚乙烯的密度在0.030至0.048g / cm 3。 这些组合物表现出改善的物理性能，例如环境应力开裂抗力和艾佐德冲击强度。 由组合物制备的制品也可以表现出改进的抗冲击性能，增强的延性断裂性能和改进的抗挠曲性，其代表蠕变和抗疲劳性的组合。

公开(公告)号：US20080021183A1

公开(公告)日：2008-01-24

申请号：US11821696

申请日：2007-06-25

申请人： Blair Graham ,  Mark Ossowski ,  James Farley ,  Rainer Kolb

发明人： Blair Graham ,  Mark Ossowski ,  James Farley ,  Rainer Kolb

IPC分类号： C08F210/00 ,  C08F4/06

CPC分类号： C08F210/16 ,  C08F2/34 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/24 ,  C08F2500/03 ,  C08F2500/13

摘要： A process for the production of an ethylene alpha-olefin copolymer is disclosed. The process includes polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas phase reactor at a reactor pressure of from 0.7 to 70 bar and a reactor temperature of from 20° C to 150° C to form an ethylene alpha-olefin copolymer. The resulting ethylene alpha-olefin copolymer may have a density of 0.927 g/cc or greater and environmental stress crack resistance (ESCR) of 500 hr or more when measured according to ASTM 1693/B in 10% Igepal.

摘要翻译： 公开了一种生产乙烯α-烯烃共聚物的方法。 该方法包括通过在至少一个气相反应器中在0.7至70巴的反应器压力下将乙烯和至少一种α-烯烃与金属茂催化剂接触，使聚合乙烯和至少一种α-烯烃，反应器温度为 从20℃至150℃，以形成乙烯α-烯烃共聚物。 当根据ASTM 1693 / B在10％Igepal中测量时，所得乙烯α-烯烃共聚物的密度可以为0.927g / cc或更高，环境应力开裂抗性（ESCR）为500小时以上。