DE728397C - Release agent - Google Patents

Release agent

Info

Publication number
DE728397C
DE728397C DEL106209D DEL0106209D DE728397C DE 728397 C DE728397 C DE 728397C DE L106209 D DEL106209 D DE L106209D DE L0106209 D DEL0106209 D DE L0106209D DE 728397 C DE728397 C DE 728397C
Authority
DE
Germany
Prior art keywords
weight
parts
concrete
release agent
formwork
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
DEL106209D
Other languages
German (de)
Inventor
Dr-Ing Eugen Hutzenlaub
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.)
LECHLER PAUL FA
Original Assignee
LECHLER PAUL FA
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 LECHLER PAUL FA filed Critical LECHLER PAUL FA
Priority to DEL106209D priority Critical patent/DE728397C/en
Application granted granted Critical
Publication of DE728397C publication Critical patent/DE728397C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00Moulds; Cores; Mandrels
    • B28B7/38Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/384Treating agents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/008Temporary coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paints Or Removers (AREA)

Description

Entschalungsmittel Um das Entschalen von Betonkörpern zu erleichtern, ist @es, üblich, die Schalungsformen vor denn Einbringen des Betons mit einem Überzug zu versehen, der den Zweck hat, als Trennschicht zu dienen und somit ;eine feste Verbindung zwischen Beton einerseits und Schalungsform anderseits, welche zu Beschädigungen des Betonkörpers oder der Schalungsform führenkönnte, zu unterbinden. Bekannt sind für diesen Zweck Seifen, Öle, wasserlöslich gemachte Öle, Emulsioren von Ölen und Wachsten -sowie wäßrige Salzlösungen. Ferner sind hart auftrocknende Lacke zum Anstrich von metallischen Schalungsformen in Gebrauch, und zwar werden diese vorzugsweise bei der Herstellung von Schleuderbieton verwendet, weil bei dessen Herstellung flüssige und weiche, nachgiebige überzüge unter Einwirkung der beim Schleudern auftretenden starken Flieh- und Scherkräfte von den. Formten rasch entfernt würden und somit den Zweck nicht erfüllen könnten.; außerdem würde unter Umständen die Festigkeit des Betons dadurch beeinträchtigt. Wird nun aus diesen Gründen ein. Anstrichmittel gewählt, das nach dem Trocknen einen harten Überzug liefert, so zeigt sich häufig, daß zwar der Anstrich auch bei Anfertigung von Schleuderbeton erhalten bleibt, daß ,aber die Betonoberfläche an .dem Anstrichfilm so fest haftet, daß die Entschalun,g Schwierigkeiten macht, ja sogar, daß Teile des Betons sich abspalten und am Anstrichfilm haftenbleiben.Stripping agents To facilitate the stripping of concrete bodies, it is common practice to apply a coating to the formwork before placing the concrete to provide, which has the purpose of serving as a separating layer and thus; a solid Connection between concrete on the one hand and formwork on the other hand, which leads to damage of the concrete body or the form of the formwork. Are known for this purpose soaps, oils, water-solubilized oils, emulsifiers of oils and Waxes and aqueous salt solutions. Furthermore, hard-drying varnishes are used for painting of metallic formwork forms in use, and these are preferred Used in the manufacture of slinged concrete because it is liquid and soft, resilient coatings under the action of those that occur during spinning strong centrifugal and shear forces from the. Shaped would be removed quickly and thus could not serve the purpose .; in addition, under certain circumstances, the strength of the concrete is impaired. Is now one for these reasons. Paints is chosen that provides a hard coating after drying, it often turns out that that the paint is retained even when spun concrete is made, that , but the concrete surface adheres so firmly to the paint film that the formwork, g Difficulties, even that parts of the concrete split off and on the paint film stick.

Erfindungsgemäß werden diese Unzuträglichkeiten dadurch vermi,ed@en, daß man dem Überzugsmittel neben einem durch die A.1-kalität des Zements: unverseifbaren Körper einen durch diese Alkalien verseifbaren Körper ,einverleibt. Diese Stoffe können .entweder in gelöster oder in emulgilerter Form verwendet werden. Wird ein solches, Übcrzugsmittel auf die Schalungsform:eai aufgetragen, so bildet :es nach dem Trocknen einen fest werdenden, widerstandsfähigen, lackartigen Überzug. Nach dem Einbringen des Betons genügt je- doch dessten alkalische Einwirkung, um eine dünne Oberflächenschicht des überzugs,durch Verseifung des darmenthaltenen verseifbaren Körpers mürbe zu mache" so daß die Entschalung sich ohne Schwierigkeit vollziehen läßt. Trotzdem reicht ein überzug für mehrere Formungen aus.According to the invention, these inconveniences are avoided by including a body saponifiable by these alkalis in the coating agent in addition to a body which is unsaponifiable due to the A.1-cality of the cement. These substances can be used either in dissolved or in emulsified form. If such a coating agent is applied to the formwork: eai, it forms a solid, resistant, lacquer-like coating after drying. After the concrete has been poured, however, alkaline action is sufficient to penetrate a thin surface layer of the coating Saponification of the saponifiable body contained in the intestine so that the formwork can be removed without difficulty. Nevertheless, one coating is sufficient for several forms.

Als geeignete, im Sinne der Erfindung un, vers;eifbare Körper haben sich beispielsweise Bitumina,- Peche, unverseifbare Harze und Kunstharze sowie unverseifbare Wachse erwiesen. Als versüifbare Körper kommen z. B. Kolophonium:, Extraktionsharze, Montanwachs, Stearinpech, Stearinsäure in Betracht. Nachstehend werden einige Ausführungsbeisp,eIe angegeben, die jedoch keineswegs. :erschöpfend sind.As suitable, within the meaning of the invention, un, sifiable bodies for example bitumina, pitch, unsaponifiable resins and synthetic resins as well as unsaponifiable ones Waxes proven. As a verüifbaren body z. B. Rosin :, Extraction Resins, Montan wax, stearic pitch, stearic acid into consideration. Below are some implementation examples indicated, but by no means. : are exhaustive.

1. 25 Gewichtsteile Bitumen mit Enveichungspunkt ioo' nach R. und K. und 25 Gewichts.teil:e Kolophonium werden zusammengeschmolzen und in 5o Gewichtsteilen Lackbenzin aufgelöst.1. 25 parts by weight of bitumen with a dew point 100 'according to R. and K. and 25 parts by weight: e rosin are melted together and divided into 50 parts by weight White spirit dissolved.

2. 4o Gewichtsheile helles. Cumaronharz und 15 Gewichtsteile Stearinsäure werden in 45 Gewichtsteilen Xylol gelöst.2. 4o parts by weight light. Coumarone resin and 15 parts by weight of stearic acid are dissolved in 45 parts by weight of xylene.

3. 2o Gewichtsteile Bitumen mit Erweichungspunkt So' nach R. und K., io Gewichtsteil:e dunkles Cumaro:nharz und 25 Gewichtsteile Montanwachs. werden in 45 Gewichtsteilen Xylol gelöst.3.2o parts by weight of bitumen with softening point So 'according to R. and K., 10 part by weight: e dark Cumaro: resin and 25 parts by weight of montan wax. will dissolved in 45 parts by weight of xylene.

.4. 3o Gewichtsteile Bituimen mit Erwei-' chungspunkt 6o' nach R. und K. und 25 Gewichtsteile Stearinpech werden zusammenge-.schmolzen und mit 45 Gewichtsteilen einer i %igen Lösung von Atzkali in Wasser in üblicher Weise ernulb ert..4. 3o parts by weight of bitumen with softening point 6o 'according to R. and K. and 25 parts by weight of stearic pitch are melted together and with 45 Parts by weight of a 1% solution of caustic potash in water in the usual way ert.

5. 4o Gewichtsteile helles Cumaronharz und io Gewichtsteile Stearinpech werden mit einer Aufschlämmung von 5 Gewichtsteilen Ton in 45 Gewichtsteilen Wasser in bekannter Weise emulgiert.5. 40 parts by weight of light coumarone resin and 10 parts by weight of stearic pitch are made with a slurry of 5 parts by weight of clay in 45 parts by weight of water emulsified in a known manner.

Claims (1)

PATENTANSPRUCH: Entschalungsmittel in flüssiger, gelöster oder :emulgierter Form, welche nach dem Auftragen auf Betonschalungen zu einem fest werdenden Überzug auftrocknen, dadurch gekennzeichnet, daß sie neben eiiieni durch die Alkalität des Zements verseifbaren Körper einen unverseifbaren Körper enthalten.PATENT CLAIM: Release agent in liquid, dissolved or: emulsified Form which, after being applied to concrete formwork, becomes a solid coating dry up, characterized in that in addition to eiiieni by the alkalinity of the Cement saponifiable bodies contain an unsaponifiable body.
DEL106209D 1941-12-14 1941-12-14 Release agent Expired DE728397C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL106209D DE728397C (en) 1941-12-14 1941-12-14 Release agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL106209D DE728397C (en) 1941-12-14 1941-12-14 Release agent

Publications (1)

Publication Number Publication Date
DE728397C true DE728397C (en) 1942-11-26

Family

ID=7290274

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL106209D Expired DE728397C (en) 1941-12-14 1941-12-14 Release agent

Country Status (1)

Country Link
DE (1) DE728397C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873226C (en) * 1943-04-03 1953-04-13 Hoechst Ag Concrete release agent for metallic formwork
EP0385131A1 (en) * 1989-02-25 1990-09-05 Hebel Aktiengesellschaft Process for the treatment of supports for reinforcements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873226C (en) * 1943-04-03 1953-04-13 Hoechst Ag Concrete release agent for metallic formwork
EP0385131A1 (en) * 1989-02-25 1990-09-05 Hebel Aktiengesellschaft Process for the treatment of supports for reinforcements

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