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    • 4. 发明申请
    • Methods of Making High Impact Polystyrene
    • 制造高抗冲聚苯乙烯的方法
    • US20120108747A1
    • 2012-05-03
    • US13249383
    • 2011-09-30
    • Likuo SunJose M. SosaSerge EonCarlos CorletoScott Cooper
    • Likuo SunJose M. SosaSerge EonCarlos CorletoScott Cooper
    • C08F279/02C08F2/01
    • C08F2/001C08F212/08C08F279/02C08L9/06C08L2555/84
    • A process for producing high impact polystyrene including feeding at least one vinyl aromatic monomer, an elastomer, and a free radical initiator to a first linear flow reactor to form a reaction mixture. Polymerizing the reaction mixture in the first linear flow reactor to a point below the point at which phase inversion occurs to produce a first polymerization mixture and feeding the first polymerization mixture from the first linear flow reactor to a second linear flow reactor. Polymerizing the reaction mixture in the second linear flow reactor to at least a phase inversion point of the mixture to produce a second polymerization mixture and feeding the second polymerization mixture from the second linear flow reactor to at least a third linear flow reactor for post-inversion polymerization of the second polymerization mixture. The product stream can have an ESCR value of at least 10% toughness retained with less than 10 wt % rubber content.
    • 一种生产高抗冲聚苯乙烯的方法,包括将至少一种乙烯基芳族单体,弹性体和自由基引发剂进料至第一线性流动反应器以形成反应混合物。 将第一线性流动反应器中的反应混合物聚合到低于发生相转移点的点以产生第一聚合混合物并将第一聚合混合物从第一线性流动反应器进料到第二线性流动反应器。 将第二线性流动反应器中的反应混合物聚合到混合物的至少相转变点,以产生第二聚合混合物,并将第二聚合混合物从第二线性流动反应器进料到至少第三线性流动反应器用于后反转 第二聚合混合物的聚合。 产品流的ESCR值可以保持至少10%的韧性,橡胶含量小于10wt%。
    • 7. 发明授权
    • Use of accelerators in free-radical polymerizations of styrene
    • 在苯乙烯的自由基聚合中使用促进剂
    • US06770716B1
    • 2004-08-03
    • US10379052
    • 2003-03-04
    • Jose M. SosaCyril Chevillard
    • Jose M. SosaCyril Chevillard
    • C08F27902
    • C08F12/04C08F4/06C08F236/10C08F279/02C08F4/32C08F212/00
    • It has been discovered that certain compounds serve as polymerization accelerators when employed together with peroxide initiators for the polymerization of vinylaromatic monomers. Suitable accelerators that increase the rate of decomposition of the peroxide initiator include, but are not necessarily limited to, hydroperoxides and/or metallic salts. Representative examples of suitable hydroperoxide accelerators include t-butyl hydroperoxide (TBH), cumyl hydroperoxide, and p-isopropyl cumyl hydroperoxide, whereas suitable metallic salt accelerators include cobalt naphthenate and cobalt acetoacetonate. Use of these accelerators when vinylaromatic monomers are polymerized in the presence of polybutadienes and peroxide initiators results in an increase in grafting as compared with similar copolymers made without the accelerator.
    • 已经发现,当与过氧化物引发剂一起用于乙烯基芳族单体的聚合时,某些化合物用作聚合促进剂。 增加过氧化物引发剂分解速率的合适的促进剂包括但不限于氢过氧化物和/或金属盐。 合适的氢过氧化物加速剂的代表性实例包括叔丁基过氧化氢(TBH),枯基氢过氧化物和对异丙基异丙基氢过氧化物,而合适的金属盐促进剂包括环烷酸钴和乙酰丙酮酸钴。 当在聚丁二烯和过氧化物引发剂的存在下聚合乙烯基芳族单体时,使用这些促进剂导致与不使用促进剂的类似共聚物相比,接枝增加。