DE1194530B - Core and foundry sand binders - Google Patents

Core and foundry sand binders

Info

Publication number
DE1194530B
DE1194530B DEH51056A DEH0051056A DE1194530B DE 1194530 B DE1194530 B DE 1194530B DE H51056 A DEH51056 A DE H51056A DE H0051056 A DEH0051056 A DE H0051056A DE 1194530 B DE1194530 B DE 1194530B
Authority
DE
Germany
Prior art keywords
core
foundry sand
sand binders
binders
curing
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.)
Pending
Application number
DEH51056A
Other languages
German (de)
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.)
HUETTENES KOMMANDITGESELLSCHAF
Original Assignee
HUETTENES KOMMANDITGESELLSCHAF
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 HUETTENES KOMMANDITGESELLSCHAF filed Critical HUETTENES KOMMANDITGESELLSCHAF
Priority to DEH51056A priority Critical patent/DE1194530B/en
Publication of DE1194530B publication Critical patent/DE1194530B/en
Pending legal-status Critical Current

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
    • B22C1/2246—Condensation polymers of aldehydes and ketones
    • B22C1/2253—Condensation polymers of aldehydes and ketones with phenols

Description

Kern- und Formsandbindemittel Zusatz zum Patent: 1050 026 Gegenstand des Patentes 1050 026 ist die Verwendung eines alkalisch kondensierten Phenolharzes, bei dem die Harzherstellung aus Phenol bzw. Kresol und Formalin mit tertiären organischen Aminen, vorzüglich Triäthanolamin, eingeleitet und mit einem organischen Stickstoffprodukt, das mit Formalin zu reagieren vermag, z. B. Anilin oder Harnstoff, beendet worden ist, als Kern- und Formsandbindemittel.Mold & Core sand binder additive for a patent: 1050 026 object of the patent 1050 026 is the use of an alkaline-condensed phenolic resin in which the resin from phenol or cresol and formalin with tertiary organic amines, especially triethanolamine, initiated with an organic nitrogen product able to react with formalin, e.g. B. aniline or urea has been terminated as core and molding sand binders.

Es stellte sich nun heraus, daß sich die nach dem Patent 1050 026 hergestellten und beanspruchten Harze ganz besonders für die Herstellung kalthärtender Kerne und Formen eignen.It has now been found that the resins produced and claimed according to patent 1050 026 are particularly suitable for the production of cold-curing cores and molds.

Als Katalysatoren dienen vorzugsweise solche Säuren oder sauren Salze, die sich in hochsiedenden organischen Lösungsmitteln lösen. Diese Lösungen üben neben der katalytischen Wirkung einen Weichmachereffekt auf das Harz aus, so daß die bei Verwendung wäßriger Säuren beobachtete Sprödigkeit der Kerne und Formen weitgehend beseitigt wird. Außerdem ist durch die Herabsetzung des Wassergehaltes in den Sandmischungen auch die Gefahr der Bildung von Gasblasen im fertigen Gußstück stark vermindert.Such acids or acidic salts are preferably used as catalysts, which dissolve in high-boiling organic solvents. Practice these solutions in addition to the catalytic effect, a plasticizer effect on the resin, so that the brittleness of the cores and shapes observed when using aqueous acids is largely eliminated. In addition, by reducing the water content in the sand mixtures there is also the risk of gas bubbles forming in the finished casting greatly diminished.

Beispiel 100 Gewichtsteile Halterner Quarzsand H 32, 2,5 Gewichtsteile eines gemäß Hauptpatent bergestellten Harzes und 0,8 Gewichtsteile einer Lösung von ß-Naphtolsulfonsäure in Äthylenglykol (1:1) werden vermischt und zu »GF«-Prüfriegeln verformt. Biegefestigkeit (GF) nach 24 Stunden Lufttrocknung >30 kp/cm2.Example 100 parts by weight of Halterner H 32 quartz sand, 2.5 parts by weight of a resin provided according to the main patent and 0.8 parts by weight of a solution of ß-naphtholsulfonic acid in ethylene glycol (1: 1) are mixed and made into »GF« test bars deformed. Flexural strength (GF) after 24 hours air drying> 30 kp / cm2.

Claims (1)

Patentanspruch: Verwendung von Kunstharzen nach Patent 1050 026 kalthärtende Kern- und Formsandbindemittel und von Härtungskatalysatoren, welche aus Lösungen von sauer reagierenden Substanzen in hochsiedenden organischen Lösungsmitteln mit Weichmachereffekt für Phenolharze bestehen.Claim: Use of synthetic resins according to Patent 1 050 026 cold-curing core and molding sand binders and curing catalysts which consist of solutions of acidic substances in high-boiling organic solvents with a plasticizer effect for phenolic resins.
DEH51056A 1963-12-06 1963-12-06 Core and foundry sand binders Pending DE1194530B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH51056A DE1194530B (en) 1963-12-06 1963-12-06 Core and foundry sand binders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH51056A DE1194530B (en) 1963-12-06 1963-12-06 Core and foundry sand binders

Publications (1)

Publication Number Publication Date
DE1194530B true DE1194530B (en) 1965-06-10

Family

ID=7157570

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH51056A Pending DE1194530B (en) 1963-12-06 1963-12-06 Core and foundry sand binders

Country Status (1)

Country Link
DE (1) DE1194530B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583521B1 (en) * 1966-08-01 1970-04-23 Ashland Oil Inc Masses for making foundry cores and molds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583521B1 (en) * 1966-08-01 1970-04-23 Ashland Oil Inc Masses for making foundry cores and molds

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