DE970738C - Core binder - Google Patents
Core binderInfo
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions 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
- B22C1/20—Compositions 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
- B22C1/22—Compositions 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
- B22C1/2233—Compositions 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
- B22C1/2286—Polyethers
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE528172C (en) * | 1929-03-26 | 1931-06-26 | Albert Stahn | Water-soluble core binder |
-
1943
- 1943-12-16 DE DEB5950D patent/DE970738C/en not_active Expired
Patent Citations (1)
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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