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    PROCESS OF MAKING AN ALKENYL AROMATIC FOAM
    132.
    发明申请
    PROCESS OF MAKING AN ALKENYL AROMATIC FOAM 审中-公开
    制造亚苄基芳族泡沫的方法

    公开(公告)号：WO1994010232A1

    公开(公告)日：1994-05-11

    申请号：PCT/US1993008838

    申请日：1993-09-17

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  PARK, Chung, P. ,  SUH, Kyung, W.

    IPC: C08J09/08

    CPC classification number: C08J9/141 ,  C08J9/12 ,  C08J9/122 ,  C08J9/127 ,  C08J9/16 ,  C08J2201/03 ,  C08J2203/06 ,  C08J2203/14 ,  C08J2205/052 ,  C08J2325/04

    Abstract: Disclosed is a process for making closed-cell, alkenyl aromatic polymer foam packing bodies or foam strands. An alkenyl aromatic polymer material is heated to form a melt polymer material. A blowing agent is incorporated into the melt polymer material at an elevated pressure to form a foamable gel. The blowing agent has 20 weight percent or more of a first blowing agent selected from the group consisting of carbon dioxide and ethane. The foamable gel is extruded through a die to form a foam strand. The foam strand is optionally pelletized to form a plurality of foam bodies. The bodies are further expanded by exposing them one or more times to heated air or steam. Preferably, the strands or bodies are allowed to age for a preselected period of time before and between subsequent expansions. The use of carbon dioxide and/or ethane as blowing agents allows the reduction or elimination of certain blowing agents classified as volatile organic contaminants, which are currently being employed commercially in making foam bodies.

    Abstract translation: 公开了一种制备闭孔，烯基芳族聚合物泡沫包装体或泡沫束的方法。 将烯基芳族聚合物材料加热以形成熔融聚合物材料。 将发泡剂在升高的压力下加入到熔融聚合物材料中以形成可发泡凝胶。 发泡剂具有20重量％以上的选自二氧化碳和乙烷的第一发泡剂。 可发泡凝胶通过模具挤出以形成泡沫链。 可选地，将发泡链条造粒以形成多个泡沫体。 通过将它们一次或多次暴露于加热的空气或蒸汽来进一步膨胀体。 优选地，在随后的膨胀之前和之后允许股线或身体老化预选的时间段。 使用二氧化碳和/或乙烷作为发泡剂允许减少或消除分类为挥发性有机污染物的某些发泡剂，其目前正在商业上用于制造泡沫体。

    CROSS-FLOW MICROFILTRATION PROCESS
    133.
    发明申请
    CROSS-FLOW MICROFILTRATION PROCESS 审中-公开
    跨流程微流程

    公开(公告)号：WO1994009888A1

    公开(公告)日：1994-05-11

    申请号：PCT/US1993010303

    申请日：1993-10-25

    Applicant: THE DOW CHEMICAL COMPANY ,  McREYNOLDS, Kent, B. ,  MARSH, Allyn, R., III

    Inventor： THE DOW CHEMICAL COMPANY

    IPC: B01D61/00

    CPC classification number: C13K11/00 ,  B01D61/147 ,  B01D61/22 ,  B01D65/08 ,  B01D2321/04 ,  B01D2321/2025 ,  C13B20/16

    Abstract: A method of establishing an essentially steady state cross-flow filtration flow in a cross-flow membrane filtration module by starting at a low transmembrane pressure (TMP) and steady state operation and then increasing the TMP by an iterative procedure until the performance starts to become unstable and then backing down the TMP slightly until the performance restabilizes. One preferred embodiment employs a filtration module that describes a flow length such that the permeate pressure is equal to the concentrate pressure.

    Abstract translation: 一种通过在低跨膜压力（TMP）和稳态操作下开始在交叉流膜过滤模块中建立基本上稳定的交叉流过滤流量的方法，然后通过迭代程序增加TMP，直到性能开始变得 不稳定，然后轻轻倒下TMP，直到性能恢复稳定。 一个优选实施例采用一个过滤模块，其描述流动长度，使得渗透压力等于浓缩物压力。

    NOVEL CATALYSTS FOR PREPARATION OF POLYURETHANES
    134.
    发明申请
    NOVEL CATALYSTS FOR PREPARATION OF POLYURETHANES 审中-公开
    用于制备聚氨酯的新型催化剂

    公开(公告)号：WO1994009047A1

    公开(公告)日：1994-04-28

    申请号：PCT/US1992008655

    申请日：1992-10-09

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  GRIER, Laura, Ann ,  NEILL, Paul, Lee ,  PRIESTER, Ralph, Dawson ,  MOBLEY, Larry, Wayne ,  SKAGGS, Kenneth, Wayne ,  TURNER, Robert, Burton

    IPC: C08G18/24

    CPC classification number: C08G18/161 ,  C08G18/165 ,  C08G18/24

    Abstract: Novel catalyst compositions comprising complexes of tin (IV) salts and amine compounds are used to prepare polyurethanes, polyureas, polycarbodiimides and polyisocyanurates. The complexes, which preferably employ primary amines, allow delay of gelation until they dissociate under certain reaction conditions. The complexes can be prepared neat, or in situ in an active hydrogen containing formulation component. The complexes serve to delay gelation of the formulation because they are relatively stable to moisture and will predictably dissociate upon heating, either as a result of the exothermic nature of the reaction being catalyzed or with application of an external heat source. The catalyst compositions are particularly useful for preparation of carpet underlay and in other applications requiring significant delay prior to gelation.

    Abstract translation: 使用包含锡（IV）盐和胺化合物络合物的新型催化剂组合物来制备聚氨酯，聚脲，聚碳二亚胺和聚异氰脲酸酯。 优选使用伯胺的络合物允许延迟凝胶化，直到它们在某些反应条件下解离。 络合物可以在含活性氢的制剂组分中纯净或原位制备。 该配合物用于延缓制剂的凝胶化，因为它们对水分相对稳定，并且由于反应的放热性质被催化或外加热源的加热而可预测地在加热下解离。 催化剂组合物特别可用于制备地毯底层和在凝胶化之前需要显着延迟的其它应用。

    ELECTROSTATICALLY PAINTED POLYMERS AND A PROCESS FOR MAKING SAME
    138.
    发明申请
    ELECTROSTATICALLY PAINTED POLYMERS AND A PROCESS FOR MAKING SAME 审中-公开
    静电涂料聚合物及其制备方法

    公开(公告)号：WO1994007612A1

    公开(公告)日：1994-04-14

    申请号：PCT/US1993008470

    申请日：1993-09-09

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  CARSWELL, Robert ,  CORNELL, Martin, C. ,  GROSETH, Cynthia, K. ,  PORTER, James, R. ,  PRIESTER, Ralph, D., Jr. ,  TABOR, Ricky, L. ,  ZAWISZA, Melissa, J.

    IPC: B05D01/04

    CPC classification number: H01B1/20 ,  B05D1/045

    Abstract: Polyurethane/polyurea polymers can be electrostatically painted without first being coated with a conductive primer. Disclosed is an improvement in a process for electrostatically painting polyurethane/polyurea polymers, the improvement being to prepare the polymer from a formulation including a non-volatile metal salt conductivity inducing material. The polymers painted by the process of the present invention can have physical properties and aesthetic properties substantially similar to those of otherwise identical polymers prepared without the non-volatile metal salt conductivity inducing materials of the present invention. The increased conductivity of the polymers can allow them to be charged with sufficient charge density to permit efficient paint transfer to the polymer surface. Also disclosed is a composition of at least two layers, one layer being an outer layer of electrostatically applied paint, and the other an inner layer of polyurethane/polyurea polymer.

    Abstract translation: 聚氨酯/聚脲聚合物可以静电涂漆，而无需首先涂覆导电底漆。 公开了用于静电涂覆聚氨酯/聚脲聚合物的方法的改进，其改进在于从包含非挥发性金属盐导电诱导材料的制剂制备聚合物。 通过本发明的方法涂覆的聚合物可以具有与没有本发明的非挥发性金属盐导电性诱导材料制备的其它相同聚合物的物理性质和美学性质。 聚合物的增加的电导率可以允许它们以足够的电荷密度进行充电以允许有效的涂料转移到聚合物表面。 还公开了至少两层的组合物，一层是静电涂料的外层，另一层是聚氨酯/聚脲聚合物的内层。

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