公开(公告)号：US10407578B2

公开(公告)日：2019-09-10

申请号：US15037362

申请日：2013-11-18

申请人： BASF Coatings GmbH ,  HENKEL AG & Co. KGaA

发明人： Franz-Adolf Czika ,  Klaus Lepa ,  Kristof Wapner

IPC分类号： C09D5/44 ,  C25D13/18 ,  C25D13/10 ,  C09D5/08 ,  C25D13/12

摘要： The present invention relates to an aqueous coating composition (A) having a pH in a range from 4.0 to 6.5 and comprising at least one cathodically depositable binder (A1), a total amount of at least 130 ppm of Bi, based on the total weight of (A), including at least 30 ppm of Bi in a form (A3) in solution in (A) and at least 100 ppm of Bi in a form not in solution in (A), and at least one at least bidentate complexing agent (A5) suitable for complexing Bi, (A5) being present in (A) in a fraction of at least 5 mol %, based on the total amount of the Bi present in (A), for at least partly coating an electrically conductive substrate with an electrocoat material, to a method for producing (A), to the use of (A) for at least partly coating an electrically conductive substrate with an electrocoat material, to a corresponding coating method, to an at least partly coated substrate obtainable by this method, and to a method for setting and/or maintaining the concentration of component (A3) and/or (A4) in the coating composition (A) during the coating method.

公开(公告)号：US20190292680A1

公开(公告)日：2019-09-26

申请号：US16438988

申请日：2019-06-12

申请人： Henkel AG & Co. KGaA

发明人： William G. Kozak ,  Eric C. Kuhns, Jr. ,  Klaus Lepa

IPC分类号： C25D21/22 ,  C25D11/08 ,  C25D11/02 ,  B01D15/36 ,  B01D15/20 ,  B01J39/05 ,  B01J39/18 ,  B01J47/02 ,  B01J49/06 ,  B01J49/53

摘要： A process and a system for cleaning excess aluminum from coating baths, e.g. anodization bath solutions, so that they can be reused in an effective manner is provided. The process comprises first passing a portion of the anodization bath solution having excess aluminum through a strong acid cation exchange column in a Na+ form, allowing the effluent to age thereby precipitating cryolite from the effluent; removing the precipitated cryolite from the effluent and then passing the effluent through a strong acid cation exchange column in the NH4+ form, in a preferred embodiment back through the first column, to restore NH4+ to the anodization bath solution and then adding the effluent back in to the anodization bath solution.

公开(公告)号：US09511325B2

公开(公告)日：2016-12-06

申请号：US14284530

申请日：2014-05-22

申请人： Henkel AG & Co. KGaA

发明人： Klaus Lepa ,  Ulrich Dawidowski

IPC分类号： B01D61/44 ,  B01D57/02 ,  B01D61/50 ,  B01D63/08 ,  C02F1/469

CPC分类号： B01D57/02 ,  B01D61/50 ,  B01D63/085 ,  B01D2313/143 ,  C02F1/4693

摘要： The present invention relates to a method for reducing the ionic strength or the concentration of certain polyvalent ions in aqueous dispersions of organic binding agents or inorganic solid bodies by electrodialysis, and a cell package suitable for use in the method. This method permits stabilization of aqueous compositions of the dispersed components by regulating the ionic strength or the concentration of certain polyvalent ions thereby increasing the durability and throughput times of coating baths. More particularly, the method is used in removing polyvalent metal cations from anionically stabilized aqueous binding agent dispersions. A special application exists in removing from autophoretic baths, which contain anionically dispersed organic binding agents and possibly inorganic pigments for forming protective layers on metallic components, polyvalent cations of zinc, iron and aluminum, which accumulate in the bath when components with surfaces comprised at least partially from zinc, iron and/or aluminum, are processed.

摘要翻译： 本发明涉及通过电渗析降低有机粘合剂或无机固体的水分散体中某些多价离子的离子强度或浓度的方法，以及适用于该方法的电池组。 该方法允许通过调节某些多价离子的离子强度或浓度来稳定分散组分的含水组分，从而增加涂层浴的耐久性和生产时间。 更具体地，该方法用于从阴离子稳定的水性粘合剂分散体中除去多价金属阳离子。 从含有阴离子分散的有机结合剂和可能的无机颜料在金属组分，锌，铁和铝的多价阳离子，锌，铁和铝的多价阳离子中形成保护层的自发渗透浴中除去特殊的应用，当表面的组分至少包含 部分地从锌，铁和/或铝处理。