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    • 11. 发明授权
    • Process for producing high melt flow polymers
    • 生产高熔体流动聚合物的方法
    • US06359077B1
    • 2002-03-19
    • US09537850
    • 2000-03-29
    • Marios AvgoustiAlex Kharazi
    • Marios AvgoustiAlex Kharazi
    • C08F800
    • C08J3/203C08F8/50C08F110/06C08F2810/10C08J2323/02C08F2500/12
    • Disclosed is a process making polyolefin pellet products that contain at least one unreacted free radical generator which, when heated, undergo chemical degradation producing a low viscosity polymer. The process includes contacting the polyolefin pellet with the at least one free radical generator to coat the pellet, and contacting the coated pellets and at least one unreacted free radical generator at an elevated temperature and for a period of time sufficient for the free radical initiator to soak into the interior of the pellets. The process of the invention enables the production of polyolefin pellets having any desired amount of free radical generator and therefore, production of a desired viscosity, and improves the processability of the polyolefin pellet at customer fabrication facilities to thereby provide superior quality final articles.
    • 公开了一种制造含有至少一种未反应的自由基发生剂的聚烯烃颗粒产品的方法,当加热时,其经历化学降解,产生低粘度聚合物。 该方法包括使聚烯烃颗粒与至少一种自由基发生剂接触以包覆颗粒,并使涂覆的颗粒和至少一种未反应的自由基发生剂在升高的温度下接触,并使自由基引发剂足够的时间 浸泡在颗粒的内部。 本发明的方法能够生产具有任何所需量的自由基发生剂的聚烯烃颗粒,因此产生所需的粘度,并提高客户制造设备处的聚烯烃颗粒的加工性,从而提供优质的最终制品。
    • 13. 发明授权
    • Process for pelletizing ultra-high melt flow polymers
    • 造粒超高熔体流动聚合物的方法
    • US06426026B1
    • 2002-07-30
    • US09473532
    • 1999-12-28
    • Marios AvgoustiEdward Allen LeachAlex Kharazi
    • Marios AvgoustiEdward Allen LeachAlex Kharazi
    • B29C4778
    • B29B9/06B29C47/0011B29C47/822B29C47/8895B29C2035/1616B29K2023/06B29K2023/12
    • Disclosed is a process for pelletizing high melt flow crystalline polymers to produce crystalline pellet products. The process includes feeding a polyolefin granular or pelleted polymer into a melting/mixing mechanism to provide a molten polymer material. The molten polymer material is optionally passed through a melt pump and through a die to form a plurality of molten polymer strands. The plurality of molten polymer strands then are passed through or along a water trough declined with respect to the direction of the horizontal arrays where they are sprayed with cool liquid a plurality of times in such a manner that the sprayed cool liquid creates turbulent flow and disturbs a thin film of hot water and/or steam that forms around each molten polymer strand as it is cooled without undesirable axial acceleration of the polymer strands. Subjecting the molten polymer strands to such a cooling procedure produces cooled polymer strands, which then are fed to a cutting mechanism and cut into pellets. The process produces ultra high melt flow crystalline polymer pellets which are uniformly compounded.
    • 公开了一种用于造粒高熔体流动结晶聚合物以制备结晶颗粒产品的方法。 该方法包括将聚烯烃颗粒状或颗粒状聚合物进料到熔融/混合机构中以提供熔融聚合物材料。 熔融聚合物材料任选地通过熔体泵并通过模具以形成多个熔融聚合物股线。 然后,多个熔融聚合物链通过或沿着水槽相对于水平阵列的方向下降,其中它们以冷液体喷射多次,使得喷射的冷液体产生湍流和干扰 在每个熔融聚合物股线周围形成的热水和/或蒸汽的薄膜,因为它被冷却而不会有不希望的聚合物股线的轴向加速。 使熔融的聚合物链条经受这种冷却程序产生冷却的聚合物股线,然后将其送入切割机构并切割成粒料。 该方法产生均匀混合的超高熔体流动结晶聚合物颗粒。