Process for the short-time treatment of a plastic melt with a liquid
treatment agent and the plastic thus produced
    1.
    发明授权
    Process for the short-time treatment of a plastic melt with a liquid treatment agent and the plastic thus produced 失效
    用液体处理剂短时间处理塑料熔体的方法和由此生产的塑料

    公开(公告)号:US5548033A

    公开(公告)日:1996-08-20

    申请号:US379999

    申请日:1995-01-27

    CPC分类号: B29C47/527 B29C47/0009

    摘要: A plastic melt is treated for a short-time with a liquid treatment agent under pressure, it is divided into defined subquantities, individual subquantities are brought into contact with a treatment agent and combined for a residence time of less than one second with portions of at least one other subquantity, and portions of the mixture thus formed are separated and combined with another subquantity; the steps of dividing and combining the mixture are repeated several times at intervals of less than one second until an intimate mixture of the plastic melt and the treatment agent has formed, allowing the preparation of especially homogeneously structured thermoplastic materials, e.g., poly(methacrylalkylimide) plastics, which are compatible with poly(methyl methacrylate).

    摘要翻译: 塑料熔体在压力下用液体处理剂短时间处理,分为限定的量级,各个次要物质与处理剂接触并结合使用少于1秒的停留时间,其中部分 至少一个其他的次数,并且如此形成的混合物的部分与另一个次级分离并组合; 将混合物分离和组合的步骤以小于1秒的间隔重复数次,直到形成塑料熔体和处理剂的紧密混合物,允许制备特别均匀结构的热塑性材料,例如聚(甲基丙烯酸烷基酯酰亚胺) 塑料,其与聚(甲基丙烯酸甲酯)相容。

    Homogeneous mixture of polymethacrylimide polymers
    3.
    发明授权
    Homogeneous mixture of polymethacrylimide polymers 失效
    聚异丁烯酰胺聚合物均质混合物

    公开(公告)号:US5135985A

    公开(公告)日:1992-08-04

    申请号:US698291

    申请日:1991-05-10

    IPC分类号: C08L33/00 C08L33/24

    CPC分类号: C08L33/24

    摘要: Homogeneous polymer mixtures of polymethacrylimides consist of a component (A), composed of from 30 to 90 percent by weight of methacrylalkylimide units and from 3.5 to 10 percent by weight of methacrylic acid units, and of a component (B1) or (B2) having from 10 to 50 percent by weight more methacrylalkylimide units than component (A), component (B1) having a degree of imidization of less than 95 percent and containing from 3.5 to 10 percent by weight of methacrylic acid units, and component (B2) having a degree of imidization greater than 95 percent and containing less than 3.5 percent by weight of methacrylic acid units.

    摘要翻译: 聚甲基丙烯酰亚胺的均匀聚合物混合物由组分(A)组成,组分(A)由30至90重量%的甲基丙烯酸烷基酰亚胺单元和3.5至10重量%的甲基丙烯酸单元组成,组分(B1)或(B2) 10重量%以上50重量%以上的成分(A),亚胺化度小于95重量%,含有3.5〜10重量%甲基丙烯酸单元的成分(B1),和(B2)成分 亚胺化程度大于95%,含有少于3.5%(重量)的甲基丙烯酸单元。

    Two-step method for dehydrating plastic dispersions
    4.
    发明授权
    Two-step method for dehydrating plastic dispersions 失效
    脱水塑料分散体的两步法

    公开(公告)号:US06287470B1

    公开(公告)日:2001-09-11

    申请号:US09403770

    申请日:1999-12-13

    IPC分类号: B01D1900

    摘要: The invention relates to a method for dehydrating a two-phase liquid mixture consisting of a thermoplastic synthetic melt phase and an aqueous phase, comprising the following steps: a) coagulation of the two-phase liquid mixture in a first extruder; b) dehydration of the coagulate in a twin screw extruder with a de-watering zone and screws working in an opposite direction; c) separation of constituents by degasifying. The inventive method is characterized in that a single screw extruder or a twin screw extruder with screws working in the same direction is used as a first extruder in step a).

    摘要翻译: 本发明涉及一种使由热塑性合成熔融相和水相组成的两相液体混合物脱水的方法,包括以下步骤:a)在第一挤出机中使两相液体混合物凝结; b)在具有脱水区域的双螺杆挤出机中将凝结物脱水并沿相反方向工作的螺杆; c)通过脱气分离成分。 本发明的方法的特征在于,在步骤a)中使用具有沿相同方向工作的螺杆的单螺杆挤出机或双螺杆挤出机作为第一挤出机。

    Method for dewatering a molten synthetic resin
    7.
    发明授权
    Method for dewatering a molten synthetic resin 失效
    熔融合成树脂的脱水方法

    公开(公告)号:US5650107A

    公开(公告)日:1997-07-22

    申请号:US439847

    申请日:1995-05-12

    摘要: A two phase liquid mixture of a thermoplastic synthetic resin melt and an aqueous phase, such as a latex coagulate, is dewatered in a counter-rotating twin screw extruder under a pressure which is greater that the water vapor pressure at the temperature of the melt of the thermoplastic synthetic resin by conveying the melt into partially filled screw channels in the dewatering zone and restricting it in at least one of these screw channels in the entry nip of the twin screws to create a local, narrowly limited, steep pressure gradient and to form a coherent melt cake, and draining the water in liquid form from beneath under gravity upstream from the boundary of the melt cake so that the melt cake does not stand in contact with a coherent aqueous phase.

    摘要翻译: 将热塑性合成树脂熔体和水相如胶乳凝结体的两相液体混合物在反向旋转双螺杆挤出机中在比熔体温度下的水蒸汽压力大的压力下脱水 热塑性合成树脂通过将熔体输送到脱水区中的部分填充的螺旋通道中并将其限制在双螺杆的进入辊隙中的这些螺旋通道中的至少一个中,以产生局部,狭窄限制的陡峭的压力梯度并形成 一个连贯的熔融饼,并且在重力上游从熔融块边界的下方排出液体形式的水,使得熔饼不与相干的水相接触。

    Poly (meth) acrylamides with improved color stability under thermal
stress
    8.
    发明授权
    Poly (meth) acrylamides with improved color stability under thermal stress 失效
    聚(甲基)丙烯酰亚胺,在热应力下具有改善的颜色稳定性

    公开(公告)号:US5837780A

    公开(公告)日:1998-11-17

    申请号:US759131

    申请日:1996-12-02

    CPC分类号: C08K3/32 C08F8/48

    摘要: Molding compositions MC having a reduced tendency to yellow with thermal stress which consist of a polymer PM containing units of formula I: ##STR1## blending from 0.005-1 wt % of at least one reducing inorganic phosphorus compound IP selected from the group consisting of phosphinic and phosphonic acid and its alkali metal, alkaline-earth metal, a aluminum and ammonium salts, wherein the ammonium ion can be substituted with up to four C.sub.1 -C.sub.4 alkyl and/or C.sub.5 -C.sub.8 cycloalkyl groups, with the polymer PM after conclusion of the imidation reaction.

    摘要翻译: 具有降低的热应力黄色趋势的成型组合物MC由含有式I单元的聚合物PM组成:选自由次膦酸和膦酸及其碱金属,碱土金属组成的组的无机磷化合物 金属,铝和铵盐,其中铵离子可被至多四个C 1 -C 4烷基和/或C 5 -C 8环烷基取代,与酰亚胺化反应结束后的聚合物PM反应。

    Method for reducing the polymer content of effluent during the drainage of polymer/water mixtures
    9.
    发明授权
    Method for reducing the polymer content of effluent during the drainage of polymer/water mixtures 失效
    降低聚合物/水混合物排水过程中流出物聚合物含量的方法

    公开(公告)号:US06613871B2

    公开(公告)日:2003-09-02

    申请号:US10089082

    申请日:2002-04-10

    IPC分类号: C08F600

    摘要: The invention relates to a method for reducing the polymer content in the wastewater from dewatering of two-phase liquid mixtures comprising a thermoplastic plastic melt and an aqueous phase by coagulating the plastic melt and pressing the water out of the melt cake in an extruder system, characterized in that superheated steam with a temperature of at least 280° C. is injected immediately after introduction of the two-phase liquid mixture into the extruder system.

    摘要翻译: 本发明涉及一种降低废水中聚合物含量的方法,该方法是通过将塑料熔体凝结并挤压出挤出机系统中的熔饼,将包含热塑性塑料熔体和水相的两相液体混合物脱水, 其特征在于,在将两相液体混合物引入挤出机系统之后,立即注入温度至少为280℃的过热蒸汽。