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    • 3. 发明授权
    • Process for producing vinyl chloride polymer with low residual monomer
    • 生产具有低残留单体的氯乙烯聚合物的方法
    • US06448372B2
    • 2002-09-10
    • US09764093
    • 2001-01-19
    • Takashi KobayashiRyuichi SaitoYoshinori NakaharaTadashi AmanoIchiro Hara
    • Takashi KobayashiRyuichi SaitoYoshinori NakaharaTadashi AmanoIchiro Hara
    • C08F624
    • C08F6/003C08F14/06C08L27/06C08F2/18
    • A process for producing a vinyl chloride polymer, including the steps of (a) subjecting a vinyl chloride monomer alone or a monomer mixture containing a vinyl chloride, to suspension polymerization in water; (b) subjecting the resultant vinyl chloride polymer slurry to stripping to remove an unreacted monomer remaining therein; and (c) dehydrating the polymer slurry having been subjected to stripping. In the polymerization step (a), the ratio of water/monomer is set in a weight ratio of from 0.80 to 1.50, and the viscosity at 20° C. of the polymer slurry to be fed to the stripping step is previously kept adjusted to 0.30 Pa·s or lower. In the stripping step (c), the residual unreacted monomer in the polymer slurry can efficiently be removed using steam in a smaller quantity, thus the vinyl chloride polymer can be produced at a high productivity.
    • 一种制备氯乙烯聚合物的方法,包括以下步骤:(a)使单独的氯乙烯单体或含有氯乙烯的单体混合物在水中悬浮聚合; (b)将得到的氯乙烯聚合物浆料进行汽提以除去其中残留的未反应单体; 和(c)使经过剥离的聚合物浆料脱水。 在聚合步骤(a)中,将水/单体的比例设定为0.80至1.50的重量比,并将预先进料到汽提步骤的聚合物浆料的20℃下的粘度预先保持在 0.30 Pa.s以下。 在汽提步骤(c)中,聚合物淤浆中残留的未反应单体可以用较少量的蒸汽有效地除去,从而可以高生产率生产氯乙烯聚合物。
    • 4. 发明授权
    • Process for making a thermoplastic molding composition
    • 制造热塑性模塑组合物的方法
    • US06683123B1
    • 2004-01-27
    • US09659281
    • 2000-09-12
    • Henry A. Kozlowski
    • Henry A. Kozlowski
    • C08F624
    • C08J3/201C08J3/005
    • A process for producing a thermoplastic molding composition is disclosed. The process entails introducing a solid polymeric resin, optionally containing residual moisture, into an extruder, operating under conditions designed to melt the resin and charging water into the melt while in the extruder to yield wet, molten resin that contains water in an amount of at least about 2 percent. The wet, molten resin is then devolatilized to yield dry resin having water content not exceeding 0.3 percent. Molding compositions thus produced have improved properties. In a preferred embodiment, the process results in a molding composition that contains a fine dispersion of a discontinuous phase in a continuous polymeric phase.
    • 公开了一种生产热塑性模塑组合物的方法。 该方法需要将固体聚合物树脂(任选地含有残余水分)引入挤出机中,在设计用于熔化树脂并在水中挤入熔融物中的水中进行操作的条件下进行操作,以产生湿的熔融树脂,其含有一定量的水 至少约2%。 然后将湿的熔融树脂脱挥发分,得到含水量不超过0.3%的干树脂。 由此生产的成型组合物具有改进的性能。 在一个优选的实施方案中,该方法得到在连续聚合物相中含有不连续相的细分散体的模塑组合物。
    • 5. 发明授权
    • Process for reclaiming residual ethylene in the preparation of vinyl ethylene copolymers
    • 在乙烯基乙烯共聚物的制备中回收残余乙烯的方法
    • US06809174B2
    • 2004-10-26
    • US10678365
    • 2003-10-03
    • Hans-Peter WeitzelRobert Braunsperger
    • Hans-Peter WeitzelRobert Braunsperger
    • C08F624
    • C08F6/003C08L31/04C08L23/0853
    • A process for preparing copolymers via free-radical-initiated polymerization of one or more vinyl esters, ethylene, and also, where appropriate, other ethylenically unsaturated monomers copolymerizable therewith, at a pressure of from 5 to 100 bar abs., in an aqueous medium, by emulsion or suspension polymerization, which comprises, after termination of the polymerization, reclaiming residual unreacted ethylene by depressurizing the polymerization reaction mixture to a pressure of from 0.1 to 5 bar absolute, comprising a gas phase containing residual ethylene gas to a pressure of from 2 to 20 bar absolute, absorbing the gas phase into vinyl ester(s), and reusing the resulting solution of ethylene in vinyl esters(s) in a further polymerization.
    • 一种通过自由基引发的一种或多种乙烯基酯,乙烯,以及在适当的情况下,可与其共聚的其它烯属不饱和单体,在5-100巴绝对压力下,在水介质中进行自由基引发聚合制备共聚物的方法 通过乳液或悬浮聚合,其包括在聚合终止后通过将聚合反应混合物减压至0.1至5巴绝对压力来回收残留的未反应的乙烯,其包含含残余乙烯气体的气相至压力为 2至20巴绝对,将气相吸收到乙烯基酯中,并在得到的乙烯基酯溶液中重新使用乙烯基酯进一步聚合。
    • 6. 发明授权
    • Process for producing vinyl chloride polymer
    • 制备氯乙烯聚合物的方法
    • US06242562B1
    • 2001-06-05
    • US09468951
    • 1999-12-22
    • Takashi KobayashiTadashi Amano
    • Takashi KobayashiTadashi Amano
    • C08F624
    • C08F6/003C08L27/06
    • A process for producing a vinyl chloride polymer is provided which includes the steps of: (A) suspension polymerizing vinyl chloride or a monomer mixture containing vinyl chloride, in an aqueous medium to obtain a polymer slurry; (B) stripping unreacted monomers remaining in the polymer slurry; and (C) subjecting the polymer slurry having passed through the step (B), to dehydration at a temperature of from 80° C. to 95° C., preferably within 60 minutes after the stripping. According to this process, the polymer cake obtained after the polymer slurry Is dehydrated can be made to have a greatly low water content. Hence the drying time in the drying step can be shortened to bring about an improvement in productivity and also to achieve a reduction of energy consumption in the drying step and consequently a reduction of production cost. Vinyl chloride polymer dried products having good anti-initial discoloration properties can be obtained.
    • 提供了一种制备氯乙烯聚合物的方法,其包括以下步骤:(A)在水性介质中将氯乙烯或含有氯乙烯的单体混合物悬浮聚合以获得聚合物浆料;(B)将未反应的单体残留在 聚合物浆料; 和(C)使通过步骤(B)的聚合物浆料在80℃至95℃的温度下脱水,优选在剥离后60分钟内脱水。 根据该方法,可以使聚合物浆料脱水后得到的聚合物饼具有极低的含水量。 因此,干燥步骤中的干燥时间可以缩短,从而实现生产率的提高,并且还能够实现干燥步骤中的能量消耗的降低,从而降低生产成本。 可以获得具有良好抗初始变色特性的氯乙烯聚合物干燥产品。