DE970738C - Core binder - Google Patents

Core binder

Info

Publication number
DE970738C
DE970738C DEB5950D DEB0005950D DE970738C DE 970738 C DE970738 C DE 970738C DE B5950 D DEB5950 D DE B5950D DE B0005950 D DEB0005950 D DE B0005950D DE 970738 C DE970738 C DE 970738C
Authority
DE
Germany
Prior art keywords
residue
core binder
distillation residues
carbon atoms
core
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
DEB5950D
Other languages
German (de)
Inventor
Dr Erich Flickinger
Dr Hans Krzikalla
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB5950D priority Critical patent/DE970738C/en
Application granted granted Critical
Publication of DE970738C publication Critical patent/DE970738C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/20Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
    • B22C1/22Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
    • B22C1/2233Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B22C1/2286Polyethers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Mold Materials And Core Materials (AREA)

Description

Kernbindemittel Es ist bekannt, Glycerinpech, d. h. Desti'llationsrückstände des dreiwertigen Alkohols Glycerin, als Kernbindemittel zu verwenden. Dieses Produkt wurde sogar als der einzige für diesen Zweck brauchbare Stoff angesehen (vgl. die deutsche Patentschrift 528 r72).Core binders It is known to use glycerine pitch, i.e. H. Desti'llation residues of the trihydric alcohol glycerine, to be used as a core binder. This product was even regarded as the only substance that could be used for this purpose (cf. German patent specification 528 r72).

Es wurde nun gefunden, daß die technisch in großen Mengen zugänglichen Destillationsrückstände von synthetischen Polyalkoholen, die 4 bis 6 miteinander verbundene Kohlenstoff atome und zwei oder drei Hydroxylgruppen enthalten, von denen höchstens zwei aneinander benachbarten Kohlen. Stoffatomen stehen, gegebenenfalls unter Zusatz von Kondensationsbeschleunigern, mindestens ebenso gut als Kernbindemittel geeignet sind.It has now been found that the technically accessible in large quantities Distillation residues of synthetic polyalcohols containing 4 to 6 with each other linked carbon atoms and contain two or three hydroxyl groups, one of which at most two coals adjacent to each other. Substance atoms are available, if applicable with the addition of condensation accelerators, at least as good as core binders are suitable.

Als derartige Polyalkohole, deren Destiilationsrückstände erfindungsgemäß verwendet werden, seien z. B. genannt die Rückstände von i,3-Butandiol, r,4-Butan.diol, r,2,4-Butantriol, Hexantriol oder Trimethylolpropan. Man kann die Rückstände für sich allein oder auch in Mischung, gegebenenfalls auch mit anderen bereits bekannten Kernbindemitteln, soweit sie miteinander verträglich sind, verwenden.As such polyalcohols, their distillation residues according to the invention are used, for example. B. called the residues of i, 3-butanediol, r, 4-butanediol, r, 2,4-butanetriol, hexanetriol or trimethylolpropane. One can use the residue for alone or as a mixture, possibly also with others already known Use core binders as long as they are compatible with one another.

Als Kondensationsmittel kann man vorteilhaft z. B. Ammoniumsalze starker Säuren,- wie Ammoni.umchlori,d, verwenden. Wenn die wäßrige Lösung des Destillationsrückstandes alkalisch reagieren sollte, muß man sie vor der Verwendung neutralisieren oder schwach sauer einstellen.As a condensing agent can be advantageous z. B. ammonium salts stronger Use acids, such as Ammoni.umchlori, d. When the aqueous solution of the still residue should have an alkaline reaction, it must be neutralized or weakly before use set sour.

Die günstigste Menge des anzuwendenden Rückstandes hängt von der Oberfläche des Formsandes ab und ist von Fall zu. Fall durch Vo,rversuche leicht zu bestimmen. Ebenso hängt die Trockentemperatur und die Trockendauer von der Beschaffenheit, insbesondere dem Polymerisationsgrad des Rückstandes und des verwendeten Formsandes ab. Beispiel i 6 kg Destillationsrückstand von technischem i,4-Butandiol werden mit 4 kg Wasser verrührt. Die Lösung wird mit verdünnter Schwefelsäure neutralisiert und mit i5o kg Formsand gut vermengt. Man drückt in die Masse in üblicher Weise eine Form ein und trocknet etwa 4 Stunden bei i5o° C. Man erhält auf diese Weise eine harte Form von guter Standfestigkeit.The most favorable amount of residue to apply depends on the surface of the molding sand and is from case to. Case easy to determine by preliminary experiments. The drying temperature also depends and the drying time of the Nature, in particular the degree of polymerization of the residue and the one used Molding sand. Example i 6 kg of technical grade 1,4-butanediol distillation residue are stirred with 4 kg of water. The solution is neutralized with dilute sulfuric acid and mixed well with 150 kg of molding sand. Press into the mass in the usual way a mold and dry for about 4 hours at 150 ° C. This gives a hard form of good stability.

In der gleichen Weise lassen sich die Destillationsrückstände von 1,3-Bu.tandiol oder 1,2,4-Trioxybutan verwenden.In the same way, the distillation residues of Use 1,3-butanediol or 1,2,4-trioxybutane.

Beispiel 2 5 kg Destillationsrückstand von technischem Hexantriol werden. mit 4 kg Wasser und 2 kg Ammoniumchlorid verrührt und mit 150 kg Formsand vermengt. Nach 4stündigem Trocknen bei i5o° C erhält man eine harte Masse, die die vor dem Trocknen eingepreßten Formen in scharfen Umrissen wiedergibt.Example 2 5 kg of technical hexanetriol distillation residue become. stirred with 4 kg of water and 2 kg of ammonium chloride and mixed with 1 50 kg molding sand. After drying for 4 hours at 150 ° C., a hard mass is obtained which shows the shapes pressed in before drying in sharp outlines.

Claims (1)

PATENTANSPRUCH: Verwendung von Destillationsrückständen mehrwertiger . Alkohole als Kernbindemittel, dadurch gekennzeichnet, daß man Destillationsrückständie solcher synthetischer Polyalkohole verwendet, die 4 bis 6 miteinander verbundene Kohlenstoffatome und zwei oder drei Hydroxylgruppen enthalten, von denen höchstens zwei an einanderbenachbarten Kohlenstoffatomenstehen. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 528 172; Die Gießerei, 1941, S. 5o2, 5o3.PATENT CLAIM: Use of multivalent distillation residues . Alcohols as core binders, characterized in that distillation residues such synthetic polyalcohols used, the 4 to 6 linked together Carbon atoms and two or three hydroxyl groups, of which at most two adjacent carbon atoms. Considered publications: German Patent No. 528 172; The foundry, 1941, pp. 5o2, 5o3.
DEB5950D 1943-12-16 1943-12-16 Core binder Expired DE970738C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB5950D DE970738C (en) 1943-12-16 1943-12-16 Core binder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB5950D DE970738C (en) 1943-12-16 1943-12-16 Core binder

Publications (1)

Publication Number Publication Date
DE970738C true DE970738C (en) 1958-10-23

Family

ID=6954271

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB5950D Expired DE970738C (en) 1943-12-16 1943-12-16 Core binder

Country Status (1)

Country Link
DE (1) DE970738C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE528172C (en) * 1929-03-26 1931-06-26 Albert Stahn Water-soluble core binder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE528172C (en) * 1929-03-26 1931-06-26 Albert Stahn Water-soluble core binder

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