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.Info
- 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
Links
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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)
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 |
Family
ID=5657926
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)
Country | Link |
---|---|
CH (1) | CH123744A (en) |
Cited By (1)
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 |
-
1926
- 1926-08-27 CH CH123744D patent/CH123744A/en unknown
Cited By (1)
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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