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1.发明授权
公开(公告)号：US5698658A
公开(公告)日：1997-12-16
申请号：US657745
申请日：1996-05-31
摘要： A linear polyamide having a weight average molecular weight above 200,000 is made by heating a lower molecular weight molten polyamide with thorough mixing at a temperature of about 265.degree.-300.degree. C. for at least 5 minutes while an inert gas is swept gently through the reactor, the increase of molecular weight of the polyamide being catalyzed by a particular phosphinic acid derivative.
摘要翻译： 通过在约265℃-300℃的温度下充分混合加热较低分子量的熔融聚酰胺至少5分钟，同时将惰性气体轻轻地扫过该混合物，从而制得重均分子量大于20万的直链聚酰胺 反应器中，由特定次膦酸衍生物催化的聚酰胺的分子量的增加。
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公开(公告)号：US5889112A
公开(公告)日：1999-03-30
申请号：US975881
申请日：1997-11-21
IPC分类号： C08J3/20 , B01F3/18 , B01F7/08 , C08G81/00 , C08G81/02 , C08J3/00 , C08L77/00 , C08L101/00 , C08G63/48 , C08G63/91
CPC分类号： C08J3/005 , C08G81/028
摘要： A staged feeding process for preparing a composition by mixing at least a first polymer and a second, dissimilar polymer forms a final composition comprising a uniform, small-particle dispersion of the first polymer in a matrix of the second polymer. Preferably, the first polymer has a melt viscosity greater than the second polymer. The process comprises the steps of feeding the first polymer in a first feed stage and feeding all of the second polymer as a melt at least two feed stages to mix the first and second polymers. Alternatively, the process may comprise feeding the first polymer in a first feed stage and feeding all of the second polymer in at least two feed stages subsequent to the first feed stage. In either case, this mixing initiates a chemical reaction between the first and second polymers.
摘要翻译： 通过混合至少第一聚合物和第二异种聚合物来制备组合物的分级进料方法形成包含第一聚合物的均匀的小颗粒分散体在第二聚合物的基质中的最终组合物。 优选地，第一聚合物的熔体粘度大于第二聚合物。 该方法包括以下步骤：在第一进料段中进料第一聚合物，并将所有第二聚合物作为熔体进料至少两个进料阶段，以混合第一和第二聚合物。 或者，该方法可以包括在第一进料阶段中进料第一聚合物并在第一进料阶段之后的至少两个进料阶段中将所有第二聚合物进料。 在任一情况下，该混合引发第一和第二聚合物之间的化学反应。
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公开(公告)号：US4028302A
公开(公告)日：1977-06-07
申请号：US620422
申请日：1975-10-07
申请人： Daniel Gregory Tynan
发明人： Daniel Gregory Tynan
CPC分类号： C08J3/11 , C08J2333/20
摘要： Clear, bubble-free acrylonitrile polymer solutions of high polymer concentration are rapidly prepared by feeding powdered acrylonitrile polymer to a cool zone of a twin-screw machine and injecting solvent to form a slurry at a temperature below 40.degree. C., advancing the cool slurry to a heated zone and converting the slurry into a concentrated solution at 110.degree. to 150.degree. C. while intermittently squeezing it in directions transverse to the axes of the screws, and discharging the hot solution continuously from the machine. A zone of reduced pressure is provided to remove gases trapped in the slurry. A twin-screw machine for carrying out the process is disclosed.
摘要翻译： 通过将粉状丙烯腈聚合物进料到双螺杆机的冷却区域并注入溶剂以在低于40℃的温度下形成浆料来快速制备具有高聚合物浓度的无气泡的丙烯腈聚合物溶液，推进冷浆料 在110〜150℃下将浆料转化成浓缩溶液，同时在与螺杆的轴线垂直的方向上间歇地挤压，并将热溶液从机器中排出。 提供减压区以除去捕集在浆料中的气体。 公开了一种用于执行该过程的双螺杆机。
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公开(公告)号：US5941634A
公开(公告)日：1999-08-24
申请号：US23243
申请日：1998-02-13
摘要： A mixing apparatus suitable for mixing and conveying solid, particulate, polymeric materials, comprising a barrel that can be heated and cooled, at least two co-rotatable, self-wiping extruder screws located within the bore of the barrel, the screws being connected through a laterally flexible coupling to a drive means which can reverse the direction of rotation of the screws upon the occurrence of a predetermined event. The apparatus also comprises a closeable feed port and a closeable discharge port, both of which can be made gas-tight, the shafts of the screws being provided with seals capable of withstanding elevated gas pressures inside the barrel.
摘要翻译： 一种适用于混合和输送固体，颗粒状聚合材料的混合装置，包括可被加热和冷却的筒体，位于筒体孔内的至少两个可共同旋转的自擦拭挤出机螺杆，螺杆通过 与驱动装置的横向柔性联接，其能够在发生预定事件时扭转螺钉的旋转方向。 该设备还包括可关闭的进料口和可关闭的排出口，两者都可气密地形成，螺杆的轴上设有能够承受桶内气体压力升高的密封件。
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5.发明授权Continuous process for preparing particulate microporous, open-celled polymer structures in a screw-type extruder 失效在螺杆式挤出机中制备颗粒微孔，开孔聚合物结构的连续方法
公开(公告)号：US4041115A
公开(公告)日：1977-08-09
申请号：US576632
申请日：1975-05-12
CPC分类号： B29B13/10 , C08J3/21 , C08J9/26 , Y10S264/05 , Y10S264/13
摘要： A continuous process for preparing particulate microporous, open-celled polymer structures in a co-rotating twin-screw processor comprising agitating normally solid organic polymer and chlorofluorocarbon in the melt zone of said processor, cooling the resulting solution under agitation in the cooling and milling zone, extruding a snow-like mass from the cooling and milling zone, and then removing the chlorofluorocarbon from the snow-like mass to leave the polymer structures.
摘要翻译： 一种用于在同向旋转双螺杆处理器中制备颗粒状微孔，开孔聚合物结构的连续方法，包括在所述处理器的熔融区域中搅拌通常为固体的有机聚合物和氯氟烃，在冷却和研磨区域中搅拌下将所得溶液冷却 从冷却和研磨区域挤出雪状物质，然后从雪状物质中除去氯氟烃以离开聚合物结构。
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公开(公告)号：US5727876A
公开(公告)日：1998-03-17
申请号：US657743
申请日：1996-05-31
申请人： Daniel Gregory Tynan
发明人： Daniel Gregory Tynan
摘要： A mixing apparatus suitable for mixing and conveying solid, particulate, polymeric materials, comprising a barrel that can be heated and cooled, at least two co-rotatable, self-wiping extruder screws located within the bore of the barrel, the screws being connected through a laterally flexible coupling to a dirve means which can reverse the direction of rotation of the screws upon the occurrence of a predetermined event. The apparatus also comprises a closeable feed port and a closeable discharge port, both of which can be made gas-tight, the shafts of the screws being provided with seals capable of withstanding elevated gas pressures inside the barrel.
摘要翻译： 一种适用于混合和输送固体，颗粒状聚合材料的混合装置，包括可被加热和冷却的筒体，位于筒体孔内的至少两个可共同旋转的自擦拭挤出机螺杆，螺杆通过 与枢转装置的横向柔性联接，其能够在发生预定事件时扭转螺钉的旋转方向。 该设备还包括可关闭的进料口和可关闭的排出口，两者都可气密地形成，螺杆的轴上设有能够承受桶内气体压力升高的密封件。
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