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    • 3. 发明授权
    • Polyethylene compositions for injection molding
    • 用于注塑的聚乙烯组合物
    • US07396878B2
    • 2008-07-08
    • US11186185
    • 2005-07-21
    • Arnold LustigerDavid John LohseBlair A. GrahamBarry C. Trudell
    • Arnold LustigerDavid John LohseBlair A. GrahamBarry C. Trudell
    • C08L23/00C08L23/04
    • C08L23/06C08L23/08C08L23/0815C08L2205/02C08L2314/02C08L2666/06
    • 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.
    • 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。
    • 6. 发明授权
    • Heat-seal resin and package formed therefrom
    • 热封树脂和由此形成的包装
    • US08173748B1
    • 2012-05-08
    • US12972035
    • 2010-12-17
    • David John LohseThomas Tungshi SunAspy K. MehtaGabor KissRobert Patrick Reynolds, Jr.John W. ChuManika Varma-Nair
    • David John LohseThomas Tungshi SunAspy K. MehtaGabor KissRobert Patrick Reynolds, Jr.John W. ChuManika Varma-Nair
    • C08F8/00C08L23/00C08L23/04C08L23/10
    • C08L23/142C08L2205/025
    • Provided is a heat-seal resin. The resin includes 5 wt % to 95 wt % of a first copolymer and 95 wt % to 5 wt % of a second copolymer based on the total weight of the resin. The first copolymer and the second copolymer together are 90 wt % or more of the total weight of the resin. The first copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the first copolymer are different. The first copolymer has an MFR of from 5 to 1000 g/10 minutes and a Tfm of 66° C. to 80° C. The second copolymer includes a first monomer of an alphaolefin of 2 to 4 carbon atoms and a second monomer selected from a second monomer of an alphaolefin of 2 to 8 carbon atoms. The first monomer and the second monomer of the second copolymer are different. The second copolymer has an MFR of from 0.5 to 5 g/10 minutes and a Tfm of 45° C. to 66° C., wherein the first copolymer has an MFR of at least 2 g/10 minutes greater and a Tfm of at least 10° C. greater than the second copolymer. There is also a package formed partly or entirely of the resin.
    • 提供一种热封树脂。 基于树脂的总重量,树脂包含5重量%至95重量%的第一共聚物和95重量%至5重量%的第二共聚物。 第一共聚物和第二共聚物一起是树脂总重量的90重量%以上。 第一共聚物包括2至4个碳原子的α-烯烃的第一单体和选自2至8个碳原子的α-烯烃的第二单体的第二单体。 第一共聚物的第一单体和第二单体是不同的。 第一共聚物的MFR为5至1000g / 10分钟,Tfm为66℃至80℃。第二共聚物包括第一单体,其具有2至4个碳原子的α-烯烃,第二单体选自 2至8个碳原子的α-烯烃的第二单体。 第二共聚物的第一单体和第二单体是不同的。 第二共聚物的MFR为0.5〜5g / 10分钟,Tfm为45〜66℃,其中第一共聚物的MFR为2g / 10分钟以上, 比第二共聚物大至少10℃。 还有一部分或全部由树脂形成的包装。
    • 7. 发明申请
    • Process for Making Dendritic Hydrocarbon Polymers
    • 制备树枝状烃聚合物的方法
    • US20110118420A1
    • 2011-05-19
    • US12904428
    • 2010-10-14
    • David John LohseNikos HadjichristidisAndy Haishung TsouSuzzy C.H. HoPaul Edward Schuenzel
    • David John LohseNikos HadjichristidisAndy Haishung TsouSuzzy C.H. HoPaul Edward Schuenzel
    • C08F8/04C08J3/24
    • C08G83/003C08C19/02C08C19/44C08F8/04C08F36/04C08F297/023C08G81/022C08G83/004C08F4/488
    • A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a polyalkadiene defining a multiplicity of lithiated chain ends; (b) reacting the polyalkadiene with an amount of a tri- or di-functional silane coupling agent to form a dendritic polyalkadiene; and (c) hydrogenating the dendritic polyalkadiene to form a substantially saturated dendritic hydrocarbon polymer. Also a process for process for making a dendritic hydrocarbon polymer, comprising: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a hydrocarbon polymer defining a multiplicity of lithiated chain ends; and (b) reacting the hydrocarbon polymer with an amount of a tri- or di-functional silane coupling agent to form a dendritic hydrocarbon polymer.
    • 制备基本上饱和的树枝状烃聚合物的方法。 该方法具有以下步骤:(a)在二 - 或三官能有机锂引发剂的存在下,在阴离子条件下聚合一定量的一种或多种链烯二烯单体和/或一种或多种链烯基芳族聚合物,以产生限定 锂化链末端的多重性; (b)使聚二烯与一定量的三官能或二官能硅烷偶联剂反应以形成树枝状聚二烯; 和(c)氢化树枝状聚亚烷基二醇以形成基本饱和的树枝状烃聚合物。 还有一种用于制备树枝状烃聚合物的方法,其包括:(a)在二 - 或三官能有机锂存在下,在阴离子条件下聚合一定量的一种或多种链烯二烯单体和/或一种或多种链烯基芳族聚合物 引发剂以产生限定多个锂化链端的烃聚合物; 和(b)使烃聚合物与一定量的三官能或二官能的硅烷偶联剂反应以形成树枝状烃聚合物。
    • 8. 发明授权
    • Polyethylene compositions for rotational molding
    • 用于旋转成型的聚乙烯组合物
    • US07396881B2
    • 2008-07-08
    • US11186443
    • 2005-07-21
    • Arnold LustigerDavid John LohseBlair A. GrahamRonald Cooke
    • Arnold LustigerDavid John LohseBlair A. GrahamRonald Cooke
    • C08L23/04B28B1/28
    • B29C41/04B29C41/003C08L23/06C08L23/08C08L23/0815C08L2205/02C08L2314/02C08L2666/06
    • 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.
    • 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。