DE1569023A1 - Low-odor binder for the hot box process - Google Patents
Low-odor binder for the hot box processInfo
- Publication number
- DE1569023A1 DE1569023A1 DE19651569023 DE1569023A DE1569023A1 DE 1569023 A1 DE1569023 A1 DE 1569023A1 DE 19651569023 DE19651569023 DE 19651569023 DE 1569023 A DE1569023 A DE 1569023A DE 1569023 A1 DE1569023 A1 DE 1569023A1
- Authority
- DE
- Germany
- Prior art keywords
- hot box
- urea
- box process
- phenol
- low
- 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
Links
- 239000011230 binding agent Substances 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 27
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- -1 methylol groups Chemical group 0.000 claims description 4
- 239000007849 furan resin Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
- C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
- C08G14/12—Chemically modified polycondensates
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Mold Materials And Core Materials (AREA)
Description
Cerucharmes Bindemittel für das Hot-Box-Verfahren Es ist bekannt, daß Kondensationsprodukte aus Harnstoff und Formaldehyd mit und ohne Zusatz von Phenolresolen als Bindemittel f(Ir das Hot-Box-Verfahren verwendet werden. Un feste, widerstandsfähige Kerne zu erhalten, müssen î Mol harnstoff mit indestens 4,8 bis 6 Molen Formaldehyd kondensiert werden0 Wenn man berückeichtigt, daß das Phenolresol auch noch etwa 1,5 Mol Eormaldehyd je Xol Phenol enthält, so ergibt sich für die Herstellung dieser "Hot-Box-Binder" ein Molverhältnis von 6,3 # 7,5 Mol Formaldehyd auf 1 Mol Harnstoff plus 1 Mol Phenol. Cure-poor binder for the hot box process It is known that condensation products of urea and formaldehyde with and without the addition of Phenolic resols can be used as binders f (Ir the hot box method. Un solid, To obtain resistant nuclei, î mol urea with at least 4.8 to 6 moles of formaldehyde are condensed0 If one corrects that the phenol resol also contains about 1.5 moles of formaldehyde per xol phenol, the result is for Manufacture this "hot box binder" a mole ratio of 6.3 # 7.5 moles of formaldehyde to 1 mole of urea plus 1 mole of phenol.
Diese Binder ergeben zwar gute Festigkeiten, jedoch ist die Geruchsbelästigung durch freiwerdenden Formaldehyd außerordentlich gross. Wird be der angegebenen Zussmmensetzung der Anteil Formaldehyd auf 4 Mol verringert, so wird die Geruchsbelästigung kaum herabgesstzt; diesse Harz ist weniger reaktionsfähig und benötigt, um gute FEstigkeiten flu erhalten, eine ltngere Anhärtezeit in der Kernbücse. Außerdem ist das Harz nicht lagerbeständig und gelatiniert bereits nach kurzer Zeit.Although these binders give good strength, the odor is nuisance extraordinarily large due to the formaldehyde released. Will be used in the specified composition If the proportion of formaldehyde is reduced to 4 moles, there is hardly any unpleasant smell belittled; this resin is less reactive and needs to have good strength flu, a longer hardening time in the core box. Besides, the resin is not stable and gelatinized after a short time.
Es wurde nun überraschenderwise gefunden, dar die Nachteile der bekannten Bindemittel auf der Basis eines Vorkondensates aus Harnstoff, Phenol und Formaldehyd und einem Härtemittel durch ein Bindemittal überwunden werden, das aus atwa 1 Mol Harnstoff und 1 Mol Phenol auf etwa 3,5 - 4,6 Mol Formaldehyd bei niedriger Temperatur in alkalischem Medium unter Bildung von Methylolgruppen gebildet und dann beit einen schwach sauren pH-Wert (4,5 - 5,5) nit einem Alkohol der allgemeinen Formel R-CH2OH, in der R Wasserstoff, ein aliphatischer, aromatischer oder heterocyclischer Rest ist, bie erhöhter Temperatur unter Azwendung von mindestens 1 Mol Alkohol auf 1 Mol Harnstoff verethert worden ist.It has now surprisingly been found that the disadvantages of the known ones Binder on the basis of a precondensate of urea, phenol and formaldehyde and a hardening agent can be overcome by a binder consisting of at about 1 mol Urea and 1 mole of phenol to about 3.5-4.6 moles of formaldehyde at low temperature formed in an alkaline medium with the formation of methylol groups and then with one weakly acidic pH value (4.5 - 5.5) with an alcohol of the general formula R-CH2OH, in which R is hydrogen, an aliphatic, aromatic or heterocyclic radical is, at elevated temperature using at least 1 mole of alcohol to 1 Mole of urea has been etherified.
Zur Verätherung des vorkondensierten Harzes können für die -Zwecke der Erfindunp z.B. folgende Alkohole verwendet werden: Äthanol, Methanol, Propanol und Butanol sowie deren Isomere, Furfurylalkohol, Benzylalkohol, Glykole und Glyzerin. Als besonders vorteilhaft für die Zwecke der Erfindung hat isch Teopropylalkohol erwiesen. Als Harter eignet sich für du erfindungzgemässe Vorkondensat z.B. Ammoniumchlorid, vorzugsweise in wäzzriger Lösung.The following alcohols, for example, can be used to etherify the precondensed resin for the purposes of the invention: ethanol, methanol, propanol and butanol and their isomers, furfuryl alcohol, benzyl alcohol, glycols and glycerine. Teopropyl alcohol has proven particularly advantageous for the purposes of the invention. A suitable hardener for the precondensate according to the invention is, for example, ammonium chloride, preferably in an aqueous solution.
Das erfindungsgemässe Bindemittel zeichnet sich durch eine grosse Reaktionsfreudigkeit und dadurch aus, daß es praktisch keine Geruchsbelästigung bedingt: außerdem ist es lagerbestindig und seine Viskosität ändert sich nur sehr langssm.The binder according to the invention is characterized by a large Responsiveness and the fact that there is practically no odor nuisance conditional: it is also storage-stable and its viscosity only changes a lot slow
Es wurde ferner gefunden, daß ein erfindungsgemäss kondensiertes Harz auch fflr Säurehärtung bei Raumtemperatur allein und im Gemisch mit den hierfür üblichen Furanharzen geeignet ist. Als Säuren haben sich z.B. Phosphorsäure, organische Sulfonsäure wie Naphthalinsulfonsäure bewehrt.It has also been found that a resin condensed according to the present invention also for acid hardening at room temperature alone and in a mixture with the for this purpose usual furan resins is suitable. As acids, e.g. phosphoric acid, organic Sulphonic acid such as naphthalenesulphonic acid.
Patentansprüche Claims
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH0055165 | 1965-02-13 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE1569023A1 true DE1569023A1 (en) | 1969-08-21 |
| DE1569023B2 DE1569023B2 (en) | 1976-05-06 |
| DE1569023C3 DE1569023C3 (en) | 1981-08-20 |
Family
ID=7158941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19651569023 Expired DE1569023C3 (en) | 1965-02-13 | 1965-02-13 | Binder for the hot box process |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1569023C3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5443292A (en) * | 1977-09-12 | 1979-04-05 | Unitika Ltd | Etherified phenolic chelate resin* its production* and adsorption treatment |
| DE102019123372B4 (en) | 2019-08-30 | 2025-05-28 | Bindur Gmbh | Thermosetting molding material for the production of cores and molds using the sand molding process |
| DE102019123374A1 (en) | 2019-08-30 | 2021-03-04 | Bindur Gmbh | Process for the production of cores and molds using the sand molding process |
-
1965
- 1965-02-13 DE DE19651569023 patent/DE1569023C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1569023B2 (en) | 1976-05-06 |
| DE1569023C3 (en) | 1981-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AT157715B (en) | Process for the preparation of aldehyde condensation products. | |
| DE910475C (en) | Process for the production of nitrogen-containing condensation products | |
| DE749553C (en) | Process for the production of cation-exchanging synthetic resins | |
| DE2430899C3 (en) | Process for the production of low-viscosity, full-bodied melamine resin solutions with a low content of free formaldehyde | |
| DE1569023A1 (en) | Low-odor binder for the hot box process | |
| DE1964961A1 (en) | Hardenable copolycondensate and process for the production of copolycondensates | |
| CH342753A (en) | Process for the preparation of a stable solution of a curable condensation product from melamine, thiourea and formaldehyde | |
| DE1815897C3 (en) | Process for the production of curable copolycondensates | |
| DE569021C (en) | Process for the preparation of resinous condensation products from aromatic sulfamides and aldehydes | |
| AT237901B (en) | Process for the preparation of water-miscible methylol melamine alkyl ether resins | |
| CH432839A (en) | Process for the preparation of water-miscible methylol melamine alkyl ether resins | |
| AT132558B (en) | Process for the preparation of transparent phenol-formaldehyde condensation products. | |
| EP0075822B1 (en) | Process for the preparation of aminoplast resins and their use | |
| DE534808C (en) | Process for the preparation of resinous condensation products from phenols and aldehydes | |
| AT131131B (en) | Process for the preparation of curable condensation products from phenolic alcohols. | |
| DE805759C (en) | Process for the production of vinyl compounds | |
| DE736370C (en) | Resin-containing paints or compositions | |
| AT132395B (en) | Process for the production of synthetic resins. | |
| DE2439828B2 (en) | HEAT-TURNABLE COMPOUNDS FOR THE PRODUCTION OF FOUNDRY CORES AND SHAPES | |
| CH207518A (en) | Process for the production of castings. | |
| DE813210C (en) | Process for the manufacture of a thermosetting resinous product | |
| DE538323C (en) | Process for the production of elastic masses from condensation products | |
| AT163630B (en) | Process for the preparation of water-soluble methylated methylolmelamines | |
| AT201293B (en) | Process for making curable condensation products | |
| DE652516C (en) | Process for the production of molded bodies with high mechanical and thermal strength |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |