DE648180C - Process for the production of enamel - Google Patents

Process for the production of enamel

Info

Publication number
DE648180C
DE648180C DEC50058D DEC0050058D DE648180C DE 648180 C DE648180 C DE 648180C DE C50058 D DEC50058 D DE C50058D DE C0050058 D DEC0050058 D DE C0050058D DE 648180 C DE648180 C DE 648180C
Authority
DE
Germany
Prior art keywords
borax
enamel
production
polyphosphate
advantage
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
Application number
DEC50058D
Other languages
German (de)
Inventor
Dr-Ing Hans Mengele
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.)
Chemische Werke Vorm H & E Alb
Original Assignee
Chemische Werke Vorm H & E Alb
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 Chemische Werke Vorm H & E Alb filed Critical Chemische Werke Vorm H & E Alb
Priority to DEC50058D priority Critical patent/DE648180C/en
Application granted granted Critical
Publication of DE648180C publication Critical patent/DE648180C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
    • C03C8/08—Frit compositions, i.e. in a powdered or comminuted form containing phosphorus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)

Description

Verfahren zur Herstellung von Email Zur Herstellung von Email wurde bisher in vielen Fällen Borsäure ioder Borax verwendet. Es wurde nun gefunden, daß man den Borax ganz oder zum größten Teil durch Piolyphosphate ersetzen kann. Polyphosphate sind solche wasserfreien Phosphate, bei denen 2 : x > Na. 0 : P205 > z : r. Es wurde zwar bereits vorgeschlagen, zu Emailschmelzen geringe Mengen von Di- ioder Triphosphaten zuzusetzen. Ein vollständiger Ersatz .des Borax durch Phosphat ist dagegen bisher noch nicht versucht worden. Durch die vorgeschlagenen. geringen Zusätze von Di- und Tri,orthophosphat konnten einige Vorteile wohl erzielt werden. Von Nachteil ist aber bei Zusätzen von Di- und Triorthophosphat der hohe Alkaligehalt, der bei Polyphosphat geringer ist und dem verhältnismäßigen Alkaligehalt (Alkali zu Säurerest) im Borax nahekommt. Trotzdem dürfte nach Ansicht der Fachwelt bei dem heutigen Boraxpreis Natriumorthophosphat als Zusatz für Borax kaum in Betracht kommen. Bei Verwendung von Polyphosphaten dagegen ist es, sehr wohl möglich, - den -Borax sogar ganz der zum größten Teil durch Polyphosphat zu .ersetzen. Die Verwendung von Polyphosphat bietet neben dem Vorteil, daß beim Einschmelzen kein Wasser zu verdampfen ist wie beim Borax Moder wie bei den bekannten Di- 'oder Triphosphaten, noch den weiteren Vorteil, daß das Polyphosphat, berechnet auf Na20, billiger ist .als der Borax, ebenfalls berechnet auf Na20. Neben dem technischen Vorteil bei der Anwendung von Polyphosphat an Stelle von Borax für die Erschmelzung von Email ist also noch ein wirtschaftlicher Vorteil gegeben.Process for the production of enamel To date, boric acid or borax has been used in many cases for the production of enamel. It has now been found that all or most of the borax can be replaced by piolyphosphates. Polyphosphates are those anhydrous phosphates where 2: x> Na. 0: P205> z: r. It has already been proposed to add small amounts of di- or triphosphates to enamel melts. A complete replacement of the borax by phosphate, however, has not yet been attempted. Through the proposed. small additions of di- and tri-orthophosphate, some advantages could be achieved. However, the disadvantage of the addition of di- and triorthophosphate is the high alkali content, which is lower in polyphosphate and comes close to the relative alkali content (alkali to acid residue) in borax. Nevertheless, in the opinion of experts, at today's borax price, sodium orthophosphate should hardly be considered as an additive for borax. When using polyphosphates other hand, it is quite possible - not to .ersetzen the -Borax even for the most part by polyphosphate. The use of polyphosphate offers, in addition to the advantage that no water has to be evaporated when melting down, as is the case with borax moder as with the known di- or triphosphates, the further advantage that the polyphosphate, calculated on Na 2 O, is cheaper than borax , also calculated on Na20. In addition to the technical advantage of using polyphosphate instead of borax for melting enamel, there is also an economic advantage.

Claims (1)

PATENTANSPRUCH': Verfahren zur Herstellung von Email, dadurch gekennzeichnet, daß Borax ganz oder teilweise durch Polyphiosphat hersetzt wird. -PATENT CLAIM ': Process for the production of enamel, characterized in that that borax is wholly or partly replaced by polyphiosphate. -
DEC50058D 1935-01-09 1935-01-09 Process for the production of enamel Expired DE648180C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC50058D DE648180C (en) 1935-01-09 1935-01-09 Process for the production of enamel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC50058D DE648180C (en) 1935-01-09 1935-01-09 Process for the production of enamel

Publications (1)

Publication Number Publication Date
DE648180C true DE648180C (en) 1937-07-24

Family

ID=7027105

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC50058D Expired DE648180C (en) 1935-01-09 1935-01-09 Process for the production of enamel

Country Status (1)

Country Link
DE (1) DE648180C (en)

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