CH123744A - Process for the production of homogeneous precipitates from aqueous dispersions of rubber-like substances on metallic precipitate substrates. - Google Patents

Process for the production of homogeneous precipitates from aqueous dispersions of rubber-like substances on metallic precipitate substrates.

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Publication number
CH123744A
CH123744A CH123744DA CH123744A CH 123744 A CH123744 A CH 123744A CH 123744D A CH123744D A CH 123744DA CH 123744 A CH123744 A CH 123744A
Authority
CH
Switzerland
Prior art keywords
rubber
production
substrates
substances
aqueous dispersions
Prior art date
Application number
Other languages
German (de)
Inventor
Limited The Anode Rubb Company
Original Assignee
Anode Rubber Company Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anode Rubber Company Limited filed Critical Anode Rubber Company Limited
Publication of CH123744A publication Critical patent/CH123744A/en

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  • Processes Of Treating Macromolecular Substances (AREA)
  • Electrolytic Production Of Metals (AREA)

Description

  

  Verfahren zur Herstellung -von homogenen     Niederschlägen    aus wässerigen Dispersionen  kautschukartiger Stoffe auf metallischen     Niederschlagungsunterlagen.       Es ist     bekannt,    dass bei der Herstellung  von Kautschukniederschlägen auf elektri  schem Wege gleichzeitig mit der Nieder  schlagung des Kautschuks auch eine Elek  trolyse der in der     Dispersionsflüssigkeit    der  Kautschukdispersion enthaltenen Elektrolyte  stattfindet, welche eine Gasentwicklung an  der Anode zur Folge hat, und dass es die  ser     anodischen    Gasentwicklung zuzuschrei  ben ist, dass man auf diesem Wege keinen  homogenen     Kautschukniederschlag    erzielen  konnte.  



  Es wurde nun gefunden, dass es mög  lich ist, die Gasbildung in Kautschukdisper  sionen, zum Beispiel im handelsüblich     prä-          servierten    Latex, bei der Niederschlagung  auf metallischen Unterlagen, zu     unterdrük-          ken,    wenn man die Elektrophorese mit  einer Stromdichte beginnt, bei welcher der  Potentialsprung     än    der Anode nicht genügt,  um eine mit Gasbildung verknüpfte Elek  trolyse zu bewirken, also etwa unterhalb  1,7 V liegt.

   Beim Fortschreiten der elektro-         phoretischen    Niederschlagung des Kaut  schuks kann der elektrische Widerstand  steigen.     In    diesem Falle kann die     Spannung     allmählich erhöht werden, ohne den Poten  tialsprung an der Anode zu erhöhen.  



  Es ist zu bemerken, dass zu den in Frage  kommenden Dispersionen sowohl von Füll  materialien freie, als auch Füllstoffe,     Vul-          ka.nisationsmittel,        Vulkanisationsbeschleuni-          ger,    Farbstoffe, Kautschukersatzstoffe, oder  andere Zusatzstoffe enthaltende vulkani  sierte oder     iuivulkanisierte,    natürliche oder  künstliche, gegebenenfalls auch konzen  trierte Dispersionen des Kautschuks oder  eines ähnlichen Stoffes, wie zum Beispiel       Guttapercha    oder     Balata,    gehören.



  Process for the production of homogeneous precipitates from aqueous dispersions of rubber-like substances on metallic precipitate substrates. It is known that in the production of rubber precipitates by electrical means simultaneously with the precipitation of the rubber, electrolytes of the electrolytes contained in the dispersion liquid of the rubber dispersion also take place, which results in gas development at the anode, and that this water Anodic gas development is attributable to the fact that it was not possible to achieve a homogeneous rubber deposit in this way.



  It has now been found that it is possible to suppress the formation of gas in rubber dispersions, for example in commercially available latex when it is deposited on metallic substrates, if the electrophoresis is started with a current density at which the The jump in potential at the anode is not sufficient to cause electrolysis associated with gas formation, i.e. it is approximately below 1.7 V.

   As the electrophoretic deposition of the rubber progresses, the electrical resistance can increase. In this case, the voltage can be increased gradually without increasing the potential jump at the anode.



  It should be noted that, for the dispersions in question, both free of filler materials and fillers, vulcanization agents, vulcanization accelerators, dyes, rubber substitutes or other additives containing vulcanized or vulcanized natural or artificial, optionally also concentrated dispersions of rubber or a similar substance, such as gutta-percha or balata, belong.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von homoge nen Niederschlägen auf elektrischem Wege aus wässerigen Dispersionen kautschuk artiger Stoffe auf metallischen Niederschla- gungsunterlagen, dadurch gekennzeichnet, dass man die Elektrophorese mit einer Stromdichte ausführt, die unterhalb dem jenigen obern Grenzwerte liegt, bei denn der an der Niederschlagungsfläche entste- hende Potentialsprung für die mit Gasbil dung verknüpfte Elektrolyse genügt. PATENT CLAIM: A process for the production of homogeneous precipitates by electrical means from aqueous dispersions of rubber-like substances on metallic precipitation substrates, characterized in that the electrophoresis is carried out with a current density that is below the upper limit value at that on the precipitation surface The resulting potential jump for the electrolysis associated with gas formation is sufficient.
CH123744D 1925-09-04 1926-08-27 Process for the production of homogeneous precipitates from aqueous dispersions of rubber-like substances on metallic precipitate substrates. CH123744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE123744X 1925-09-04

Publications (1)

Publication Number Publication Date
CH123744A true CH123744A (en) 1927-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH123744D CH123744A (en) 1925-09-04 1926-08-27 Process for the production of homogeneous precipitates from aqueous dispersions of rubber-like substances on metallic precipitate substrates.

Country Status (1)

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CH (1) CH123744A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11478502B2 (en) 2006-01-06 2022-10-25 American Regent, Inc. Methods and compositions for administration of iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11478502B2 (en) 2006-01-06 2022-10-25 American Regent, Inc. Methods and compositions for administration of iron

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