DE471780C - Process for applying a firmly adhering and tightly fitting metal coating to insulating plates and foils made of cellulose ethers and esters by means of superficial saponification of the same, namely for the production of electrical condensers - Google Patents
Process for applying a firmly adhering and tightly fitting metal coating to insulating plates and foils made of cellulose ethers and esters by means of superficial saponification of the same, namely for the production of electrical condensersInfo
- Publication number
- DE471780C DE471780C DEP51662D DEP0051662D DE471780C DE 471780 C DE471780 C DE 471780C DE P51662 D DEP51662 D DE P51662D DE P0051662 D DEP0051662 D DE P0051662D DE 471780 C DE471780 C DE 471780C
- Authority
- DE
- Germany
- Prior art keywords
- metal
- cellulose
- esters
- same
- namely
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 24
- 239000002184 metal Substances 0.000 title claims description 24
- 229920002678 cellulose Polymers 0.000 title claims description 11
- 238000007127 saponification reaction Methods 0.000 title claims description 8
- 229920003086 cellulose ether Polymers 0.000 title claims description 5
- 239000011248 coating agent Substances 0.000 title claims description 5
- 238000000576 coating method Methods 0.000 title claims description 5
- 150000002148 esters Chemical class 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 5
- 239000011888 foil Substances 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000002253 acid Substances 0.000 claims description 7
- 239000001913 cellulose Substances 0.000 claims description 7
- 239000012266 salt solution Substances 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 230000008021 deposition Effects 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 230000001603 reducing effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000007857 degradation product Substances 0.000 claims 1
- -1 metal oxide compounds Chemical class 0.000 claims 1
- 150000007513 acids Chemical class 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 1
- 229940081735 acetylcellulose Drugs 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HAAYBYDROVFKPU-UHFFFAOYSA-N silver;azane;nitrate Chemical compound N.N.[Ag+].[O-][N+]([O-])=O HAAYBYDROVFKPU-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/012—Form of non-self-supporting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/02—Diaphragms; Separators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
Description
Verfahren zum Aufbringen eines festhaftenden und dicht anliegenden 1Vletallbelages auf Isolierplatten und Folien aus Celluloseäthern und -estern mittels oberflächlicher Verseifung derselben, namentlich zur Herstellung von elektrischen Kondensatoren Isolierplatten und Isolierfolien aus Acetylcellulose eignen sich vorzüglich zum Bau elektrischer Kondensatoren, hauptsächlich wegen der hohen dielektrischen Festigkeit dieses Stoffes. Die hohe dielektrische Festigkeit kann aber nur dann ausgenutzt werden, wenn ein absolut inniger Kontakt zwischen Isoliermaterial und Metallbelag vorhanden ist, so daß luft- oder gaserfüllte Spalten zwischen beiden und in diesen auftretende Glimmentladungen vollkommen ausgeschlossen sind.Method of applying a firmly adherent and tightly fitting 1Vetal coverings on insulating panels and foils made from cellulose ethers and esters by means of superficial saponification of the same, especially for the production of electrical ones Capacitors insulating plates and insulating foils made of acetyl cellulose are ideal used to build electrical capacitors, mainly because of their high dielectric properties Strength of this substance. The high dielectric strength can only then be exploited when there is absolutely intimate contact between the insulating material and Metal covering is present, so that air or gas-filled gaps between the two and glow discharges occurring in these are completely excluded.
Es ist bereits bekannt, einen Film aus diesem Stoff vor Aufbringung des Metallniederschlages durch Säuren oder Laugen oberflächlich zu verseifen. Hiervon unterscheidet sich das den Gegenstand vorliegender Erfindung bildende Verfahren dadurch, daß die oberflächliche Verseifung der Äther und Ester durch Anwendung von Metallsalzlösungen, welche einen Überschuß einer Säure oder eines Alkalis enthalten, derart erfolgt, daß durch die Reduktionswirkung der frei gewordenen Cellulose eine kolloidale Abscheidung von Metall bzw. Metalloxyden erfolgt. Diese Schicht zeigt eine Färbung von Hellgelb über Braun bis Schwarz,. je nach der Dichte des eingetretenen Niederschlages, es ist dabei eine Verbindung zwischen Cellulose und Metall-bzw. Metalloxyd anzunehmen. Diese festhaftende Zwischenschicht bildet die Unterlage für den aufzubringenden Metallbelag, der unter Zugabe eines Reduktionsmittels in bekannter Weise auf chemischem oder elektrolytischem Wege aufgebracht wird. Für das Festhalten des Metallbelages ist, wie oben als bereits bekannt erwähnt, eine oberflächliche Verseifung des Celluloseäthers oder -esters Grundbedingung. Werden hierzu Alkalien oder Säuren für sich allein verwendet, so erfolgt ein zu scharfer Angriff auf das Isolationsmaterial. Es wird daher gemäß der Erfindung diese Verseifung in Gegenwart der Metallsalze- vorgenommen, da hierdurch eine sanftere Einwirkung auf das Isoliermaterial erzielt wird, indem durch die gleichzeitige Abscheidung des Metalles bzw. Metalloxydes ein Schutz gegen allzuheftige Angriffe der Alkalien oder Säuren auf die Cellulose entsteht.It is already known to make a film of this material prior to application to saponify the surface of the metal precipitate using acids or alkalis. Of this differs in the process which is the subject of the present invention in that the superficial saponification of the ethers and esters by the application of Metal salt solutions which contain an excess of an acid or an alkali, takes place in such a way that the reducing effect of the cellulose released colloidal deposition of metal or metal oxides takes place. This layer shows a color from light yellow to brown to black. depending on the density of what has occurred Precipitation, there is a connection between cellulose and metal or. Accept metal oxide. This firmly adhering intermediate layer forms the base for the metal coating to be applied, which with the addition of a reducing agent in known Way is applied chemically or electrolytically. For holding on of the metal covering is, as already mentioned above, a superficial one Saponification of the cellulose ether or ester is a basic requirement. Do this with alkalis or acids are used by themselves, the attack is too sharp Insulation material. It is therefore according to the invention this saponification in the presence the metal salts, as this has a gentler effect on the insulating material is achieved by the simultaneous deposition of the metal or metal oxide a protection against excessive attacks of alkalis or acids on the cellulose arises.
Als Metallsalzlösung zur oberflächlichen Verseifung der Cellulose dient eine Lösung, welche einen Überschuß eines Alkalis, z. B. Kalium-, Natrium- oder Ammoniumhydroxyd, oder einen Überschuß einer Säure, z. B. Schwefelsäure, enthält. Als Metallsalzlösung dient hauptsächlich eine ammoniakalische Silbernitratlösung.As a metal salt solution for the superficial saponification of cellulose is a solution which contains an excess of an alkali, e.g. B. Potassium, Sodium or ammonium hydroxide, or an excess of an acid, e.g. B. sulfuric acid contains. The main metal salt solution used is an ammoniacal silver nitrate solution.
Erfindungsgemäß kann auch dieselbe Metallsalzlösung zur Erzeugung der Zwischenschicht und des leitenden Metallbelages verwendet werden:According to the invention, the same metal salt solution can also be used to the The following can be used to create the intermediate layer and the conductive metal coating:
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP51662D DE471780C (en) | 1925-11-13 | 1925-11-13 | Process for applying a firmly adhering and tightly fitting metal coating to insulating plates and foils made of cellulose ethers and esters by means of superficial saponification of the same, namely for the production of electrical condensers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP51662D DE471780C (en) | 1925-11-13 | 1925-11-13 | Process for applying a firmly adhering and tightly fitting metal coating to insulating plates and foils made of cellulose ethers and esters by means of superficial saponification of the same, namely for the production of electrical condensers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE471780C true DE471780C (en) | 1929-02-19 |
Family
ID=7385245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEP51662D Expired DE471780C (en) | 1925-11-13 | 1925-11-13 | Process for applying a firmly adhering and tightly fitting metal coating to insulating plates and foils made of cellulose ethers and esters by means of superficial saponification of the same, namely for the production of electrical condensers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE471780C (en) |
-
1925
- 1925-11-13 DE DEP51662D patent/DE471780C/en not_active Expired
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