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    • 1. 发明申请
    • Polymerization Process Utilizing Hydrogen
    • 利用氢气的聚合方法
    • US20110313116A1
    • 2011-12-22
    • US12817269
    • 2010-06-17
    • David Knoeppel
    • David Knoeppel
    • C08F4/24
    • C08F210/16C08F2/38C08F4/24C08F210/14C08F2500/12
    • Ethylene polymerization processes and polymers formed from the same are discussed herein. The ethylene polymerization processes generally include introducing ethylene monomer into a polymerization reaction zone; introducing a chromium oxide based catalyst into the polymerization reaction zone; introducing a quantity of hydrogen into the polymerization reaction zone; and contacting the ethylene monomer with the chromium oxide based catalyst in the polymerization reaction zone in the presence of hydrogen to form polyethylene, wherein the polyethylene formed in the presence of hydrogen exhibits an MI2 that increases with an increasing quantity of hydrogen and a molecular weight and molecular weight distribution that remains essentially constant with an increasing quantity of hydrogen.
    • 本文讨论了乙烯聚合方法和由其形成的聚合物。 乙烯聚合方法通常包括将乙烯单体引入聚合反应区; 将氧化铬基催化剂引入聚合反应区; 将一定量的氢气引入聚合反应区; 并在氢气存在下使乙烯单体与氧化铬基催化剂在聚合反应区中接触以形成聚乙烯,其中在氢气存在下形成的聚乙烯表现出随着氢气和分子量的增加而增加的MI2, 分子量分布随着氢的增加而保持基本恒定。
    • 2. 发明申请
    • Methods of making styrenic polymeric compositions and methods of using same
    • 制备苯乙烯聚合物组合物的方法及其使用方法
    • US20100184920A1
    • 2010-07-22
    • US12357905
    • 2009-01-22
    • David Knoeppel
    • David Knoeppel
    • C08L9/00C08F12/08
    • C08F279/02C08K5/098C08F212/08C08L51/04
    • A method comprising preparing a reaction mixture comprising a styrene monomer, an antioxidant, and a reaction rate improving additive, contacting the reaction mixture with an antioxidant reactive compound, and placing the reaction mixture under conditions suitable for polymerization of the styrene monomer to a styrenic polymer wherein the polymerization occurs at an overall reaction rate that is increased by equal to or less than 20% when compared to an otherwise similar polymerization process carried out in the absence of the reaction rate improving additive A method comprising preparing a reaction mixture comprising a styrene monomer, an elastomer, an antioxidant, a sodium or calcium salt of an organic acid, and an initiator; and placing the reaction mixture under conditions suitable for polymerization of the styrene monomer to a styrenic polymer, wherein the sodium or calcium salt of an organic acid protects the initiator such that the polymerization is carried out at a reaction rate greater than would otherwise be the rate in the absence of the sodium or calcium salt of an organic acid.
    • 一种包括制备包含苯乙烯单体,抗氧化剂和反应速率改进添加剂的反应混合物的方法,使反应混合物与抗氧化反应性化合物接触,并将反应混合物置于适合于将苯乙烯单体聚合成苯乙烯聚合物的条件下 其中当在不存在反应速率改进添加剂A的情况下进行相似的聚合方法时,聚合反应的总反应速率增加等于或小于20%。该方法包括制备包含苯乙烯单体的反应混合物 ,有机酸的弹性体,抗氧化剂,钠或钙盐和引发剂; 并将反应混合物置于适合于将苯乙烯单体聚合成苯乙烯聚合物的条件下,其中有机酸的钠盐或钙盐保护引发剂,使得聚合反应速率大于否则为反应速率 在没有有机酸的钠盐或钙盐的情况下。
    • 4. 发明授权
    • Heat-treated Ziegler-Natta catalysts for ethylene polymerization
    • 用于乙烯聚合的热处理齐格勒 - 纳塔催化剂
    • US08501653B2
    • 2013-08-06
    • US13028390
    • 2011-02-16
    • Lei ZhangDavid Knoeppel
    • Lei ZhangDavid Knoeppel
    • B01J3/00B01J37/00C08F4/02C08F4/60
    • C08F10/00C08F110/02C08F4/6557C08F2500/04C08F2500/11C08F2500/12C08F2500/17C08F2500/18C08F2500/20C08F2500/23C08F2500/26
    • Catalyst systems, processes of forming the same and polymers formed therefrom are described herein. The processes of forming the catalyst systems generally include contacting a blend of an alkyl magnesium compound and an organoaluminum compound with an alcohol to form a magnesium dialkoxide compound; contacting the magnesium dialkoxide compound with a first agent to form a solution of reaction product “A”, the first agent including a halogenating/titanating agent; contacting the solution of reaction product “A” with a second agent to form a solid reaction product “B”, the second agent including a blend of a first metal halide and a metal alkoxide; contacting the solid reaction product “B” with a third agent to form a solid reaction product “C”, the third agent including a second metal halide; contacting the solid reaction product “C” with a fourth agent to form a solid reaction product “D”, the fourth agent including a third metal halide; contacting the solid reaction product “D” with a fifth agent to form a catalyst component, the fifth agent including a reducing agent; and heating an intermediate selected from reaction product “A”, reaction product “B”, reaction product “C”, reaction product “D” and combinations thereof to form a heat-treated catalyst that results in a shear response and a molecular weight distribution for a polymer produced by the heat-treated catalyst that are greater than a shear response and a molecular weight distribution for a polymer produced by an identical non-heat-treated catalyst.
    • 本文描述了催化剂体系,其形成方法和由其形成的聚合物。 形成催化剂体系的方法通常包括使烷基镁化合物和有机铝化合物的混合物与醇接触以形成二烷氧基镁化合物; 使二烷氧基镁化合物与第一试剂接触以形成反应产物“A”的溶液,第一试剂包括卤化/钛化剂; 使反应产物“A”的溶液与第二试剂接触以形成固体反应产物“B”,第二试剂包括第一金属卤化物和金属醇盐的共混物; 使固体反应产物“B”与第三试剂接触以形成固体反应产物“C”,第三试剂包括第二金属卤化物; 使固体反应产物“C”与第四试剂接触以形成固体反应产物“D”,第四试剂包括第三金属卤化物; 使固体反应产物“D”与第五试剂接触以形成催化剂组分,第五试剂包括还原剂; 并加热选自反应产物“A”,反应产物“B”,反应产物“C”,反应产物“D”及其组合的中间体,以形成导致剪切响应和分子量分布的热处理催化剂 对于由热处理催化剂制备的聚合物,该聚合物大于由相同的非热处理催化剂制备的聚合物的剪切响应和分子量分布。