DE3018257A1 - Moisture indicator based on cobalt amine complex - embedded in silicone resin, esp. useful for evaluating effectiveness of humidifier - Google Patents

Moisture indicator based on cobalt amine complex - embedded in silicone resin, esp. useful for evaluating effectiveness of humidifier

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Publication number
DE3018257A1
DE3018257A1 DE19803018257 DE3018257A DE3018257A1 DE 3018257 A1 DE3018257 A1 DE 3018257A1 DE 19803018257 DE19803018257 DE 19803018257 DE 3018257 A DE3018257 A DE 3018257A DE 3018257 A1 DE3018257 A1 DE 3018257A1
Authority
DE
Germany
Prior art keywords
embedded
esp
useful
cobalt
moisture indicator
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.)
Granted
Application number
DE19803018257
Other languages
German (de)
Other versions
DE3018257C2 (en
Inventor
Heinrich Dipl.-Chem. Dr. 6000 Frankfurt Deibig
Klaus 6250 Limburg Wollmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Melitta Haushaltsprodukte & Co Kg 4950 Minde GmbH
Original Assignee
Melitta Werke Bentz and Sohn KG
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 Melitta Werke Bentz and Sohn KG filed Critical Melitta Werke Bentz and Sohn KG
Priority to DE19803018257 priority Critical patent/DE3018257C2/en
Publication of DE3018257A1 publication Critical patent/DE3018257A1/en
Application granted granted Critical
Publication of DE3018257C2 publication Critical patent/DE3018257C2/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/222—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating moisture content

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Biophysics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Moisture indicator based on Co (II) salts has a Co (II)- amine complex (I) embedded in a silicone matrix. (I) is the Co (II) hexamethylenetetramine cpd. (IA). The indicator is waterproof and can show water or steam rapidly and clearly. It can be used for indicating moisture in the outside atmos. the and the presence of water in liqs. and is esp. useful for assessing the effectiveness of humidifiers for heaters.

Description

Feuchtigkeitsindikator Die Erfindung betrifft einen Feuchtigkeitsindikator auf der Basis von Cobalt (II)-Salzen. Moisture Indicator The invention relates to a moisture indicator based on cobalt (II) salts.

Wäßrige Cobalt (II)-Salzlösungen und kristallwasserhaltige Cobalt (II)-Salze sind rot gefärbt, da sie das rote Komplexion Co(H20)6 enthalten. Die wasserfreien Co(II)-Salze sind dagegen rein blau. Bei Anwesenheit von Feuchtigkeit färbt sich daher das wasserfreie blaue Cobalt (II)-Salz infolge Wasseraufnahme wieder rosa. Dieser Farbumschlag wird zur Anzeige von 1uftfeuchtigkeit herangezogen. Solche Farbindikatoren können jedoch nur verwendet werden, wenn am Ort des Gebrauchs kein flüssiges Wasser vorhanden ist, weil dadurch diese-Indikatoren schnell ausgelaugt und damit unbrauchbar werden.Aqueous cobalt (II) salt solutions and cobalt containing water of crystallization (II) salts are colored red because they contain the red complex ion Co (H20) 6. the In contrast, anhydrous Co (II) salts are pure blue. In the presence of moisture Therefore, the anhydrous blue cobalt (II) salt changes color as a result of water absorption pink. This color change is used to display the humidity. Such However, color indicators can only be used if there is no one at the place of use Liquid water is present because it causes these indicators to leach out quickly and thus become unusable.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen wasserfesten Feuchtigkeitsindikator zu entwickeln, mit dem schnell und deutlich Wasser oder Wasserdampf angezeigt werden kann.The present invention is therefore based on the object to develop waterproof moisture indicator with which quickly and clearly Water or water vapor can be displayed.

Es hat sich nun gezeigt, daß sich diese Aufgabe lösen läßt, wenn der Feuchtigceitsindikator aus einer Silikonmatrix besteht, in der Cobalt (II)-Aminkomplexe eingebettet sind. Als C-D (II)-Aminkomplex wird vorzugsweise eine Komplexverbiadung von Cobalt (II)-Salzen und Hexamethylentetramin verwendet.It has now been shown that this problem can be solved if the Moisture indicator consists of a silicone matrix in which cobalt (II) amine complexes are embedded. A complex compound is preferably used as the C-D (II) amine complex used by cobalt (II) salts and hexamethylenetetramine.

Bei dem erfindungsgemäßen Feuchtigkeitsindikator ist die den Farbumschlag erzeugende Substanz in einer Silikonmatrix eingebett-t, Hierfür kommen insbesondere vernetzte Methylsilikon- infrage Aber auch andere Silikone, die den Farbu;nschlag erkennen lassen und für Wasserdampf, aber nicht für flüssiges Wasser durchlässig sind, können verwendet werden.In the case of the moisture indicator according to the invention, this is the color change generating substance embedded in a silicone matrix cross-linked methyl silicone- in question But also other silicones that change the color can be recognized and permeable to water vapor, but not to liquid water can be used.

Erfindungsgemäß wurde ferner festgestellt, daß die Intensität und Geschwindigkeit des Farbumschlags von bekannten Cobalt (11)-Salzen, z.B. CoCl2, stark erhöht werden kann, wenn die CDbaltsalze in geeigneter Weise komplexiert werden. Als sehr gutes Komplexierungsmittel hat sich Hexamethylentetramin erwiesen.According to the invention it was also found that the intensity and Speed of the color change of known cobalt (11) salts, e.g. CoCl2, can be greatly increased if the CDbalt salts are complexed in a suitable manner. Hexamethylenetetramine has proven to be a very good complexing agent.

Das Mengenverhältnis voa Cobaltkomplex und vernetztem Methylsilikon kann in weiten Grenzen variiert werden, bevorzugt werden Farbindikatoren mit ca. 20 Gew.-% Komplexsalz bezogen auf das Gesamtgewicht des Indikators.The proportion of the cobalt complex and cross-linked methyl silicone can be varied within wide limits, color indicators with approx. 20 wt .-% complex salt based on the total weight of the indicator.

Mit Hilfe des erfindung3gemäßen Feuchtigkeitsindikators kann die Feuchtigkeit in freier Atmosphäre und das Vorhandensein von Wasser in Flüssigkeiten angezeigt werden.With the aid of the moisture indicator according to the invention, the moisture in the free atmosphere and the presence of water in liquids are indicated will.

Eine besondere Verwendungsmöglichkeit liegt darin, daß z.B. die Brauchbarkeit von Verdunstermatten in Luftbefeuchtern für Heizkörper jederzeit festgestellt werden kann.A special use is that e.g. the usefulness of evaporation mats in air humidifiers for radiators at any time can be determined.

Das nachfolgende Beispiel erläutert die Erfindung: Beispiel: 40 g Hexamethylentetramin werden mit l00 g CoCl2-Hexahydrat innig vermischt. Dabei bildet sich der Co (II)-Hexamethylentetramin-Komplex. Diese Verbindung wird dann in 560 g eines feuchtigkeitshärtenden Methylsilikons eingearbeitet. Dabei wird eine Paste mit einer Verarbeitungszeit von ca.The following example explains the invention: Example: 40 g Hexamethylenetetramine are intimately mixed with 100 g of CoCl2 hexahydrate. It forms the Co (II) -hexamethylenetetramine complex. This connection is then made in 560 g of a moisture-curing methyl silicone incorporated. This creates a paste with a processing time of approx.

6 Stunden erhalten. Die tiefblau gefärbte Paste wird in Form von Scheibchen auf saugfähiges Papier, wie es in Luftbefeuchtungsvorrichtungen benutzt wird, aufgetragen und härten gelassen. Solange in einem Luftbefeuchter durch das Papier Wasser verdunstet, ist das Papier feucht und der Indikator ist rosa gefärbt.6 hours received. The deep blue colored paste comes in the form of slices applied to absorbent paper such as is used in air humidification devices and let harden. As long as water evaporates through the paper in a humidifier, the paper is damp and the indicator is colored pink.

Wenn das Papier jedoch erschöpft ist, z.B. durch Ablagerungen von im Wasser enthaltenen Härtebildnern, trocknet es aus und der Indikator färbt sich sofort tiefblau. Während der gesamten Funktionszeit wird kein Indikator aus dem mit Wasser getränkten Papier ausgelaugt.However, when the paper is exhausted, e.g. due to deposits of hardness components contained in the water, it dries out and the indicator changes color immediately deep blue. During the entire period of operation, no indicator will appear from the paper soaked with water leached.

Claims (2)

P a t e n t a n s p r ü c h e Feuchtigkeitsindikator auf der Basis von Cobalt (II)-Salzen, d a d u r c h g e k e n n z e i c h n e t, daß er aus einer Silikonmatrix besteht, in der Cobalt (II)-Aminkomplexe eingebettet sind. P a t e n t a n s p r ü c h e Moisture indicator on the base of cobalt (II) salts, it is not indicated that it is made of a There is a silicone matrix in which cobalt (II) amine complexes are embedded. 2. Feuchtigkeitsindikator nach Anspruch 1, dadurch gekennzeichnet, daß als Cobalt (II)-Aminkomplex die Cobalt (II)-Hexamethylentetramin-Verbindung verwendet wird 2. Moisture indicator according to claim 1, characterized in that that the cobalt (II) amine complex is the cobalt (II) hexamethylenetetramine compound is used
DE19803018257 1980-05-13 1980-05-13 Moisture indicator Expired DE3018257C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803018257 DE3018257C2 (en) 1980-05-13 1980-05-13 Moisture indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803018257 DE3018257C2 (en) 1980-05-13 1980-05-13 Moisture indicator

Publications (2)

Publication Number Publication Date
DE3018257A1 true DE3018257A1 (en) 1981-11-19
DE3018257C2 DE3018257C2 (en) 1983-06-23

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Family Applications (1)

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DE (1) DE3018257C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000711A1 (en) * 1984-07-12 1986-01-30 Olsson Bozena Reagent test for determining the water content of a product

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829091A1 (en) 1978-07-03 1980-01-17 Dynamit Nobel Ag INSOLUBILIZED REAGENTS CONTAINING GEL GEL

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US246007A (en) * 1881-08-23 Low-water alarm for steam-boilers
FR930506A (en) * 1946-07-11 1948-01-28 Product perfected to detect the presence of water
CH357220A (en) * 1955-08-22 1961-09-30 Ansul Chemical Co Procedure for determining the water content in liquid chlorinated or chlorofluorinated alkanes or gasoline

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US246007A (en) * 1881-08-23 Low-water alarm for steam-boilers
FR930506A (en) * 1946-07-11 1948-01-28 Product perfected to detect the presence of water
CH357220A (en) * 1955-08-22 1961-09-30 Ansul Chemical Co Procedure for determining the water content in liquid chlorinated or chlorofluorinated alkanes or gasoline

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000711A1 (en) * 1984-07-12 1986-01-30 Olsson Bozena Reagent test for determining the water content of a product

Also Published As

Publication number Publication date
DE3018257C2 (en) 1983-06-23

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: MELITTA HAUSHALTSPRODUKTE GMBH & CO KG, 4950 MINDE

8339 Ceased/non-payment of the annual fee