DE840426C - Core binder - Google Patents
Core binderInfo
- Publication number
- DE840426C DE840426C DEB5954D DEB0005954D DE840426C DE 840426 C DE840426 C DE 840426C DE B5954 D DEB5954 D DE B5954D DE B0005954 D DEB0005954 D DE B0005954D DE 840426 C DE840426 C DE 840426C
- Authority
- DE
- Germany
- Prior art keywords
- residues
- parts
- core binder
- distillation
- tetrahydrofuran
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
Kernbindemittel Ilocliniolül,tilare Polyalkohole und Kondensationsprodukte aus mehrwertigen Alkoholen mit mehrbasischen Säuren wurden schon als Kernbindemittel verwendet.Core binders Ilocliniolül, tilar polyalcohols and condensation products Polyhydric alcohols with polybasic acids have already been used as core binders used.
Es wurde nun gefunden, daß sich die hochmolekularcii Destillationsrückstände von der Herstelliiiig von Tetrahydrofuran sehr gut als Kernbindemittel eignen. Die Rückstände entstehen bei der Destillation des bei der Wasserabspaltung aus i, .4-Butandiol gewonnenen Roherzeugnisses; sie sind eine dickflüssige, dunkel gefärbte, wasserunlösliche Masse.It has now been found that the high molecular weight distillation residues from the manufacture of tetrahydrofuran are very suitable as core binders. the Residues arise during the distillation of the water splitting off from i, .4-butanediol extracted raw product; they are thick, dark colored, insoluble in water Dimensions.
Man kann die Rückstände auch unter Zusatz von Kondensationsbeschleunigern, z. B. Ammoniumchlorid, verwenden. Auch in Miischung mit anderen Kernbindemitteln, z. B. der eingangs erwähnten Art, sind sie gut brauchtbar.The residues can also be removed with the addition of condensation accelerators, z. B. ammonium chloride, use. Also mixed with other core binders, z. B. of the type mentioned above, they can be used well.
Die günstigste Menge des anzuwendenden Rückstandes hängt von der Oberfläche des verwendeten Formsandes ab und muß deshalb von Fall zu Fall bestimmt werden. Hervorzuheben ist die gute Grünstandfestigkeit der Sandforrn. Ebenso ist die Trockentemperatur und die Trockendauer von der lkschaffenheit der Rückstände und des Sandes abhängig; im allgemeinen trocknet man die Kerne bei I j#O biS 200'. Beispiel i Eine innige Mischung'von ioo Teilen Formsand und 3 bis _5 Teilen Destillationsrückständen von, der Tetrahydrofuranherstellung wird in eine Form eingedrückt. Man erhält eine geformte Masse von guter Standfestigk-eit. -Sie wird etwa 3 Stunden lang bei i8o' getrocknet. Es entsteht so eine harte, mit gutem Profil versehene Form von guter Wasserfestigkeit. BeiSpiel 2 ioo Teile Formsand werden mit 5 Teilen einer Mischung aus gleichen Teilen Tetrahydrofurandestillationsrückständen und Rückständen von der Butandioldestillation sowie 0,:2'5TeilenAmmoniumchlorid gut vermischt. Die Masse wird in eineForm gedrückt und auf 16o bis 170' erhitzt. Nach 5 Stunden erhält man eine harte Form mit scharfen Kanten.The most favorable amount of the residue to be used depends on the surface of the molding sand used and must therefore be determined on a case-by-case basis. The good green stability of the sand molds should be emphasized. Likewise, the drying temperature and the drying time depend on the nature of the silt of the residues and the sand; In general, the kernels are dried at I j # O to 200 '. Example i An intimate mixture of 100 parts of molding sand and 3 to _5 parts of distillation residues from tetrahydrofuran production is pressed into a mold. A molded mass of good stability is obtained. -It is dried at i8o ' for about 3 hours. The result is a hard, well-profiled shape with good water resistance. In the case of play, 2,000 parts of molding sand are mixed well with 5 parts of a mixture of equal parts of tetrahydrofuran distillation residues and residues from butanediol distillation and 0.25 parts of ammonium chloride. The mass is pressed into a mold and heated to 16o to 170 '. After 5 hours a hard shape with sharp edges is obtained.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB5954D DE840426C (en) | 1944-05-26 | 1944-05-26 | Core binder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB5954D DE840426C (en) | 1944-05-26 | 1944-05-26 | Core binder |
Publications (1)
Publication Number | Publication Date |
---|---|
DE840426C true DE840426C (en) | 1952-06-09 |
Family
ID=6954275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB5954D Expired DE840426C (en) | 1944-05-26 | 1944-05-26 | Core binder |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE840426C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1169085B (en) * | 1955-05-23 | 1964-04-30 | Corn Products Company Eine Ges | Core binder |
DE1189677B (en) * | 1952-05-15 | 1965-03-25 | Monsanto Co | Molding sand mixtures for casting metals |
-
1944
- 1944-05-26 DE DEB5954D patent/DE840426C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1189677B (en) * | 1952-05-15 | 1965-03-25 | Monsanto Co | Molding sand mixtures for casting metals |
DE1169085B (en) * | 1955-05-23 | 1964-04-30 | Corn Products Company Eine Ges | Core binder |
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