DE2363204A1 - SURFACE-TREATED, SEDIMENTATION-RESISTANT AND CORROSION-PROTECTIVE HEAVY METAL POWDER AND PROCESS FOR THEIR PRODUCTION - Google Patents
SURFACE-TREATED, SEDIMENTATION-RESISTANT AND CORROSION-PROTECTIVE HEAVY METAL POWDER AND PROCESS FOR THEIR PRODUCTIONInfo
- Publication number
- DE2363204A1 DE2363204A1 DE19732363204 DE2363204A DE2363204A1 DE 2363204 A1 DE2363204 A1 DE 2363204A1 DE 19732363204 DE19732363204 DE 19732363204 DE 2363204 A DE2363204 A DE 2363204A DE 2363204 A1 DE2363204 A1 DE 2363204A1
- Authority
- DE
- Germany
- Prior art keywords
- metal powder
- hydroxystearic acid
- resistant
- treated
- heavy metal
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/62—Metallic pigments or fillers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Powder Metallurgy (AREA)
Description
sedlmentationsfeste und korro- resistant to sedimentation and corrosion
sioassciiützenae Schwermetallpulver - und Verfahren zu deren Herstellung sioassciiützenae heavy metal powder - and process for their manufacture
Im Korrosionsschutz, beziehungsweise in der Lackindustrie werden seit langem Schwermetallpulver, wie zum Beispiel Blei und/ oder Zink verwendet« Sie dienen als kathodisches Schutzmaterial. Aufgrund des hohen spezifischen Gewichtes zeigen diese Metallstäube ausgeprägtes Sedimentationsverhalten, wodurch sich in den Lacken ein fester, nicht aufrührbarer Bodensatz ausbildet. Man hat deshalb durch verschiedene verdickend wirkende Zusätze dieses starke Zusammenbacken der Metallpulver mehr oder minder erfolgreich zu verhindern versucht, ohne zu restlos zufriedenstellenden Ergebnissen zu kommen. Man gab sich zufrieden, wenn entweder der Zink- oder Bleipulver enthaltende Lack aufrühr- oder aufschüttelbar war oder aber die Yiskosität bewußt so hoch gewählt wurde, daß ein Absetzen nicht mehr möglich war. Dies letztere bedingte jedoch, daß vor der Verarbeitung geeignete Lösungsmittel zur Verdünnung zugesetzt werden mußten.Heavy metal powders such as lead and / or zinc uses «They serve as a cathodic protective material. Due to the high specific weight, these show Metal dusts have a pronounced sedimentation behavior, as a result of which a solid, non-stirrable sediment forms in the paints. You therefore have more of this strong caking of the metal powder through various additives that have a thickening effect or tried to prevent it with less success without achieving completely satisfactory results. One was satisfied if either the zinc or lead powder containing lacquer could be stirred or shaken or the viscosity was deliberately chosen so high that it was no longer possible to stop. However, the latter required that prior to processing suitable solvents had to be added for dilution.
509828/0712509828/0712
Das.erfindungsgemäße Verfahren zur Herstellung oberflächenbehandelter, sedimentationsfester und korrosionsschützender Schwermetallpulver besteht darin, daß durch Vorpräparation des Schwermetallstaubs, insbesondere des Zink- oder Bleistaubs, mit thixotropierenden Verbindungen die Sedimentation in geradezu idealer Weise verhindert wird.The method according to the invention for the production of surface-treated, Heavy metal powder that is resistant to sedimentation and protects against corrosion consists in that by pre-preparation of heavy metal dust, especially zinc or lead dust, with thixotropic compounds the sedimentation in downright ideally prevented.
Als ein derartiges besonders geeignetes Präparat haben sich die 12-Hydroxystearinsäure und deren Ester erwiesen; Als Ester der 12-HydroxyStearinsäure kommt insbesondere der Glycerinester (Triglycid) in Präge.12-hydroxystearic acid and its esters have proven to be such a particularly suitable preparation; As an ester of 12-HydroxyStearic acid comes in particular from the glycerol ester (Triglycid) in embossing.
Die zur Durchführung des erfindungsgemäßen Verfahrens erforderlichen Mengen an 12-Hydroxystearinsäure oder deren Estern betragen im allgemeinen 0,5 bis 10 g und insbesondere 1 bis 3 g je 100 g Metallstaub.The necessary for carrying out the method according to the invention Amounts of 12-hydroxystearic acid or its esters generally 0.5 to 10 g and in particular 1 to 3 g per 100 g of metal dust.
Die Vorpräparation besteht nun darin, daß. manThe preliminary preparation now consists in that. man
a) Zink- oder Bleistaub mit 12-Hydroxystearinsäure oder deren Estern über ein flüssiges Medium, zum Beispiel Xylol oder Cestbenzin oder andere gebräuchliche Lösungsmittel, oberflächlich zur Reaktion bringt. Auf der Zinkstaub-Oberflache, die durch Feuchtigkeit stets basisch reagiert, werden sich gemäß der dargestellten Reaktionen im Prinzip folgende Teilchenoberflachen ausbilden:a) zinc or lead dust with 12-hydroxystearic acid or theirs Esters over a liquid medium, for example xylene or Cestbenzine or other common solvents, superficially to react. On the zinc dust surface, which always reacts in a basic manner due to moisture, the following particle surfaces will in principle be formed according to the reactions shown form:
(1) ZnO + 2 HOOC-R-R»—*H20 + Zn (-0-C-R-RO2 (1) ZnO + 2 HOOC-RR »- * H 2 0 + Zn (-0-CR-RO 2
OH OHOH OH
(2) Zn(OH)2 + 2 HOOC-R-R' —*> 2H2O * Zn(-0-C-R-RO2 (2) Zn (OH) 2 + 2 HOOC-RR ' - *> 2H 2 O * Zn (-0-CR-RO 2
OH OHOH OH
b) Erfindungsgemäß ist es aber auch möglich, den Metallstaub direkt mit der pulverförmigen 12-Hydroxystearinsäure oder deren Estern zu kombinieren. In diesem Falle wird erst im fertigen Lack eine entsprechende Orientierung der 12-Hydroxy-b) According to the invention, however, it is also possible to use the metal dust directly with the powdered 12-hydroxystearic acid or combine their esters. In this case, a corresponding orientation of the 12-hydroxy-
509828/0712509828/0712
Stearinsäure durch. Salzbildung an der Metalloherfläche eintreten. Stearic acid. Salt formation can occur on the metalloher surface.
Zn(OH) ,,+2HOOC-R-R* > Zn (OH) ,, + 2HOOC-RR * >
O-C-R-R»
OHOCRR »
OH
Überraschend ist die Tatsache, daß man dabei mit einer verhält nismäßig geringen Menge an 12-Hydroxystearinsäure oder deren Estern im Verhältnis zum Metallstaub auskommt. Im Prinzip muß man sich die Anlagerung und spätere Wirkungsweise in der Lackfarbe folgendermaßen vorstellen:Surprising is the fact that it behaves with a small amount of 12-hydroxystearic acid or its behaves Esters gets by in relation to metal dust. In principle one has to look at the accumulation and later mode of action in the paint imagine as follows:
OH — —■— ——— —· ——— ».-.-_._OH - - ■ - ——— - · ——— ».-.-_._
■i ■" ^^™ ■■ ■' *—— — ***■ \jx ■ i ■ "^^ ™ ■■ ■ '* —— - *** ■ \ jx
Dabei.ist die OH-Gruppe der 12-Hydroxystearinsäure (gleich den OH-Gruppen in hydriertem Rizinusöl, bzw. dem 12-Hydroxystearinsäur eglyc erinest er) in der Lage über van der Vaals'sche Brükkenbindungen mit der nächsten OH-Gruppe des benachbarten Zinkstaubteilchens lose Feubindungen über Gelzustände aufzubauen. Je nachdem wie viel 12-HydroxyStearinsäure oder 12-Hydroxystearinsäurester man auf die Substanz aufbringt, lassen sich sogar thixotrope Pigmentpulver herstellen.The OH group of 12-hydroxystearic acid (equal to the OH groups in hydrogenated castor oil or 12-hydroxystearic acid eglyc erinest er) able via van der Vaals'sche bridge connections to build loose bonds through gel states with the next OH group of the neighboring zinc dust particle. Ever after how much 12-hydroxy stearic acid or 12-hydroxystearic acid ester if you apply it to the substance, you can even produce thixotropic pigment powders.
Die Menge der aufzuwendenden 12-Hydroxystearinsäure, beziehungsweise deren Ester, hängt hierbei von der Viskosität des Lackeö ab. Ist der Lack hochviskos, dann benötigt man weniger 12-Hydroxystearinsäure; ist er dünn, dann braucht man umso mehr. Im allgemeinen - - --50 9828/-Θ-7 1 2 ■ -The amount of 12-hydroxystearic acid to be used, respectively their ester depends on the viscosity of the paint oil away. If the paint is highly viscous, less 12-hydroxystearic acid is required; if he is thin, then you need all the more. In general - - --50 9828 / -Θ-7 1 2 ■ -
— 4 kommt man mit 2 - 3 $ 12-HydroxyStearinsäure oder-Ester aus.- 4 you get by with 2 - 3 $ 12-hydroxy stearic acid or ester.
An Metallpigmenten für diese Vorbehandlung eignen sich neben Zn-und. Pb-Metallen auch andere "basische oxydbildende Metalle.Metal pigments for this pretreatment are also suitable Zn and. Pb metals also include other "basic oxide-forming metals".
100 g Zn-Staub100 g Zn dust
30-5Og Xylol30-5Og xylene
0,5-10g 12-HydroxyStearinsäure, vorzugsweise 1- 3g0.5-10g of 12-hydroxy stearic acid, preferably 1-3g
Die Vorbehandlung geschieht durch Auflösen der entsprechenden Säuremengen im Lösungsmittel. Da die Säure fest ist, sollte die Lösung bei ca. 50 - 600C erfolgen. In die noch heiße Lösung wird das entsprechende Metallpulver eingebracht.The pretreatment is done by dissolving the appropriate amount of acid in the solvent. Since the acid is solid, the solution should take place at approx. 50-60 ° C. The corresponding metal powder is introduced into the still hot solution.
Ka,ch ca. 10 Minuten kann die Reaktion als beendet betrachtet werden und das Lösungsmittel durch Verdampfen oder über andere Geräte entfernt werden.The reaction can be regarded as complete for about 10 minutes and the solvent removed by evaporation or other equipment.
100 g Zinkstaub100 g zinc dust
0,5-10g 12-HydroxyStearinsäure, vorzugsweise 1-3 g0.5-10 g of 12-hydroxy stearic acid, preferably 1-3 g
Die feinpulverisierte 12-HydroxyStearinsäure wird mit der entsprechenden Menge Zn-Staub durch Verteilung ^.eichmäßig inkorporiert.The finely powdered 12-hydroxy stearic acid is mixed with the corresponding amount of Zn dust through distribution incorporated.
Die so gewonnenen Metallpulver zeigen nach Einarbeitung in entsprechenden Lackfarben kein Absetzen mehr.The metal powders obtained in this way show after incorporation into corresponding Lacquer colors no longer settle.
Auch bei extremem Verdünnen und nachträglichem Erwärmen bilden sich keine festen Bodensätze.Even with extreme dilution and subsequent heating, no solid sediments are formed.
509828/07 12509828/07 12
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732363204 DE2363204A1 (en) | 1973-12-19 | 1973-12-19 | SURFACE-TREATED, SEDIMENTATION-RESISTANT AND CORROSION-PROTECTIVE HEAVY METAL POWDER AND PROCESS FOR THEIR PRODUCTION |
FR7441866A FR2255360B1 (en) | 1973-12-19 | 1974-12-18 | |
GB5494174A GB1498820A (en) | 1973-12-19 | 1974-12-19 | Non-sedimenting metal powders and their use in paints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732363204 DE2363204A1 (en) | 1973-12-19 | 1973-12-19 | SURFACE-TREATED, SEDIMENTATION-RESISTANT AND CORROSION-PROTECTIVE HEAVY METAL POWDER AND PROCESS FOR THEIR PRODUCTION |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2363204A1 true DE2363204A1 (en) | 1975-07-10 |
Family
ID=5901258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732363204 Withdrawn DE2363204A1 (en) | 1973-12-19 | 1973-12-19 | SURFACE-TREATED, SEDIMENTATION-RESISTANT AND CORROSION-PROTECTIVE HEAVY METAL POWDER AND PROCESS FOR THEIR PRODUCTION |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2363204A1 (en) |
FR (1) | FR2255360B1 (en) |
GB (1) | GB1498820A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1580882A (en) * | 1976-07-28 | 1980-12-10 | Laporte Industries Ltd | Inorganic oxide pigments |
IE54772B1 (en) * | 1982-05-14 | 1990-01-31 | Johnson Matthey Plc | Compositions comprising inorganic particles |
GB8427138D0 (en) * | 1984-10-26 | 1984-12-05 | Wilson A D | Coated substrates |
-
1973
- 1973-12-19 DE DE19732363204 patent/DE2363204A1/en not_active Withdrawn
-
1974
- 1974-12-18 FR FR7441866A patent/FR2255360B1/fr not_active Expired
- 1974-12-19 GB GB5494174A patent/GB1498820A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1498820A (en) | 1978-01-25 |
FR2255360A1 (en) | 1975-07-18 |
FR2255360B1 (en) | 1979-06-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: LINK, GUENTER, 3380 GOSLAR, DE |
|
8110 | Request for examination paragraph 44 | ||
8139 | Disposal/non-payment of the annual fee |