WO2006092716A1 - Composition de coulage - Google Patents

Composition de coulage Download PDF

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Publication number
WO2006092716A1
WO2006092716A1 PCT/IB2006/000447 IB2006000447W WO2006092716A1 WO 2006092716 A1 WO2006092716 A1 WO 2006092716A1 IB 2006000447 W IB2006000447 W IB 2006000447W WO 2006092716 A1 WO2006092716 A1 WO 2006092716A1
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WO
WIPO (PCT)
Prior art keywords
diacetal
binder
composition
composition according
weight
Prior art date
Application number
PCT/IB2006/000447
Other languages
English (en)
Inventor
Valérie BARTAGNON
Magali Veillard
Original Assignee
Clariant (France)
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 Clariant (France) filed Critical Clariant (France)
Publication of WO2006092716A1 publication Critical patent/WO2006092716A1/fr

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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

Definitions

  • the invention relates to the use of certain diacetals as additives in the preparation of moulding compositions for casting.
  • the invention also relates to compositions comprising these diacetals and to the use of these compositions in the manufacture of casting moulds and/or cores.
  • the moulds and cores used to manufacture metal parts are generally prepared from a mixture of a casting aggregate (for example sand) and of a binder which is cured by addition of a catalyst.
  • a casting aggregate for example sand
  • a binder which is cured by addition of a catalyst
  • One manufacturing technique, process of "cold curing (no bake/type)" comprises the stages consisting in mixing the aggregate with a binder and in adding a liquid curing catalyst in order to form a casting mixture.
  • This casting mixture is shaped by placing it in a pattern and by then leaving it to cure at ambient temperature, without application of heat, until it is self-supporting and able to be handled.
  • Another technique used, process of "cold box” type comprises the stages consisting in mixing the aggregate with a binder, in shaping the mixture by placing it in a pattern and in then curing the shaped component, generally at ambient temperature, by injecting a curing catalyst which can be a gas, an aerosol or a liquid gasified by a carrier gas, which is or is not heated.
  • a curing catalyst which can be a gas, an aerosol or a liquid gasified by a carrier gas, which is or is not heated.
  • the binders can be resins, such as, for example, resins of phenolic, furan or poly(urethane) type.
  • the use of these moulding processes is limited by the lifetime of the moulding composition, that is to say the time interval between the formation of the casting mixture, the latter not always being used immediately after its preparation, and the time at which this mixture can no longer be used to prepare moulds and cores of acceptable quality.
  • This lifetime can, for example, be measured by the flexural strength of the casting mixture after curing, which corresponds to the flexural strength of the moulds and cores produced from this mixture. This is because, according to Technical Recommendation No.
  • the moulds and cores will have a flexural strength which is unacceptable for the use envisaged.
  • the technical problem to be solved thus consists in increasing the lifetime of the casting compositions and/or increasing the flexural strength of the moulds and/or cores.
  • diacetal is understood to mean the compounds which can be prepared from dialdehydes and alcohols but also the compositions which can have simultaneously present structures of diacetal, monoacetal and hemiacetal type.
  • diacetal is also understood to mean the compounds which can be prepared from dialdehydes and polyols, such as glycerol or pentaerythritol, which result in acetal compounds but also in compositions which can have simultaneously present structures of diacetal, monoacetal and hemiacetal type.
  • the invention thus relates, according to a first aspect, to the use of at least one linear or cyclic diacetal, capable of being prepared from C 2 -C 6 aldehydes and C 1 -C 12 alcohols, preferably from C 2 -C 4 aldehydes and C 1 -C 8 alcohols and more particularly from C 2 -C 3 aldehydes and C 1 -C 3 alcohols, as additive in the preparation of a moulding composition.
  • Use may also be made, according to the invention, of any combination of the abovementioned acetals, for example 2 or 3 acetals, and even 4 or more.
  • Preferred compounds are, for example, 1,1,2,2-tetramethoxyethane (TME), 1,1,2,2- tetraethoxyethane (TEE), 1 , 1 ,2,2-tetrapropoxyethane (TPE), 1,1,3,3- tetramethoxypropane (TMP) or 1,1,3,3-tetraethoxypropane (TEP), and preferably TME.
  • TME 1,1,2,2-tetramethoxyethane
  • TPE 1,1,2,2-tetraethoxyethane
  • TPE 1,1,3,3- tetramethoxypropane
  • TMP 1,1,3,3-tetraethoxypropane
  • TME 1,1,3,3-tetraethoxypropane
  • the aldehydes from which the acetals which can be used according to the present invention can be prepared are, for example, dialdehydes, such as glyoxal, malonaldehyde or glutaraldehyde.
  • the alcohols from which the acetals which can be used according to the present invention can be prepared are, for example, monoalcohols, such as methanol or ethanol, diols, such as ethylene glycol, diethylene glycol, 1 ,4-butanediol or neopentyl glycol, or polyols, such as glycerol or pentaerythritol.
  • monoalcohols such as methanol or ethanol
  • diols such as ethylene glycol, diethylene glycol, 1 ,4-butanediol or neopentyl glycol
  • polyols such as glycerol or pentaerythritol.
  • a diacetal such as TME can be prepared from glyoxal and methanol.
  • the use of at least one linear or cyclic diacetal as defined above as additive in the said moulding composition makes it possible to increase its lifetime and in particular to increase its flexural strength.
  • the said moulding composition comprises an organic binder, preferably a cold-setting organic binder.
  • the said binder is a liquid or a solid composed of one or more macromolecular chains which can be crosslinked by the action of a liquid or gaseous catalyst.
  • the binder can, for example, comprise a resin of phenolic type.
  • These families of resins are mainly phenolic resins of novolac type, preferably of resol type.
  • the resols are generally prepared by condensing phenols with an excess of aldehydes, in the presence of an alkaline catalyst.
  • the novolacs are generally prepared by condensing phenols with aldehydes in the presence of acid catalysts and by using a molar excess of phenol relative to the aldehyde.
  • the most widely used monomers are phenol and formaldehyde, both for the novolacs and for the resols.
  • Phenolic resins etherified by an alcohol can also be used.
  • the said binder can, for example, comprise a resin of furan type, such as furfuryl alcohol-formaldehyde resins, urea-formaldehyde-furfuryl alcohol resins, phenol-formaldehyde-furfuryl alcohol resins, urea-formaldehyde-phenol-furfuryl alcohol resins or resorcinol-furfuryl alcohol resins.
  • a resin of furan type such as furfuryl alcohol-formaldehyde resins, urea-formaldehyde-furfuryl alcohol resins, phenol-formaldehyde-furfuryl alcohol resins, urea-formaldehyde-phenol-furfuryl alcohol resins or resorcinol-furfuryl alcohol resins.
  • These resins can also be modified by natural resins, natural products or synthetic materials, in order to obtain advantageous properties.
  • furan resins of the Chem Rez® resins sold by Ashland or the Enviroset® and Airkure® resins sold by Borden.
  • binder comprising a resin of poly(urethane) type.
  • polyisocyanates comprising at least two NCO groups and of polyols comprising at least two OH groups.
  • the polyisocyanates, blocked or nonblocked can be of aliphatic, cycloaliphatic, arylaliphatic, aromatic or heterocyclic type, such as, for example, diphenylmethane diisocyanate (MDI).
  • MDI diphenylmethane diisocyanate
  • the polyols are polyhydroxylated polyethers, polyhydroxylated polyalkyds, polyhydroxylated polyesters, polyhydroxylated epoxy resins, polyhydroxylated polyacrylics, polyhydroxylated polyacrylates and, preferably, phenolic resins as defined above.
  • the binders of poly(urethane) type are provided in the form of two- component systems, the polyol(s) and the polyisocyanate(s) being in solution in a compatible organic solvent.
  • the solvents are aromatic and/or aliphatic solvents, such as toluene, xylenes, ethylbenzene, butyl cellosolve, diacetone alcohol, dibasic esters (DBE), naphthalene or the methyl ester of industrial rapeseed oil.
  • aromatic and/or aliphatic solvents such as toluene, xylenes, ethylbenzene, butyl cellosolve, diacetone alcohol, dibasic esters (DBE), naphthalene or the methyl ester of industrial rapeseed oil.
  • resins of poly(urethane) type for example, of the Sigma Cure ® or Techniset® resins sold by Borden or the Isocure® or Pepset® resins sold by Ashland.
  • catalysts conventional in the field, such as organic or inorganic acids, in particular phosphoric acid, hydrochloric acid, sulphuric acid or sulphonic acids, in particular para- toluenesulphonic acid.
  • the catalysts used to cure the binders of polyurethane type are usually amines, preferably tertiary amines.
  • Mention may be made, by way of examples, of dimethylethylamine, dimethylisopropylamine, triethylamine or phenylpropylpyridine.
  • binders based on resins of poly(urethane) type in the casting processes of cold box type.
  • the diacetal used for the purposes of the invention is present in the moulding composition in a proportion of 0.1 to 40%, preferably of 1 to 20%, in particular of 5 to 10%, by weight of the binder.
  • the invention also relates, according to a subsequent aspect, to a binder composition comprising at least one organic binder and at least one diacetal as are defined above.
  • the diacetal present in the said composition is, for example, 1,1,2,2- tetramethoxyethane (TME), 1,1,2,2-tetraethoxyethane (TEE), 1,1,2,2- tetrapropoxyethane (TPE), 1,1,3,3-tetramethoxypropane (TMP) or 1,1,3,3- tetraethoxypropane (TEP), and preferably TME.
  • TME 1,1,2,2- tetramethoxyethane
  • TPE 1,1,2,2-tetraethoxyethane
  • TPE 1,1,2,2- tetrapropoxyethane
  • TME 1,1,3,3-tetramethoxypropane
  • TME 1,1,3,3- tetraethoxypropane
  • the diacetal as defined above is present in the binder composition in a proportion of 0.1 to 40%, preferably 1 to 20%, in particular 5 to 10%, by weight of the binder.
  • the said binder composition comprises a cold-setting organic binder as described above, for example a resin chosen from phenolic resins, furan resins and poly(urethane) resins.
  • the invention also relates to a moulding composition comprising at least one casting aggregate, characterized in that it comprises a binder composition comprising at least one organic binder and at least one linear or cyclic diacetal, capable of being prepared from C 2 -C 6 aldehydes and C 1 -C 12 alcohols, preferably from C 2 -C 4 aldehydes and C 1 -C 8 alcohols and more particularly from C 2 -C 3 aldehydes and C 1 -C 3 alcohols.
  • a binder composition comprising at least one organic binder and at least one linear or cyclic diacetal, capable of being prepared from C 2 -C 6 aldehydes and C 1 -C 12 alcohols, preferably from C 2 -C 4 aldehydes and C 1 -C 8 alcohols and more particularly from C 2 -C 3 aldehydes and C 1 -C 3 alcohols.
  • the diacetal is chosen from 1,1,2,2-tetramethoxyethane (TME), l,l,2,2-tetraethoxyethane (TEE), 1,1,2,2-tetrapro ⁇ oxyethane (TPE), 1,1,3,3- tetramethoxypropane (TMP) or 1,1,3,3-tetraethoxypropane (TEP), and preferably 1,1 ,2,2-tetramethoxyethane (TME).
  • TPE 1,1,2,2-tetramethoxyethane
  • TPE 1,1,2,2-tetrapro ⁇ oxyethane
  • TPE 1,1,3,3- tetramethoxypropane
  • TMP 1,1,3,3-tetraethoxypropane
  • TEP 1,1,3,3-tetraethoxypropane
  • the said binder composition can comprise the diacetal in a proportion of 0.1 to 40%, preferably of 1 to 20% and preferentially of 5 to 10%, by weight of the binder.
  • the addition of the diacetal allows to reduce the amount of organic binder in the binding composition while the mechanical properties (life time) of the casting composition containing this binding composition is maintained or even improved.
  • the binder composition comprises a cold-setting organic binder as described above, for example a resin chosen from phenolic resins, furan resins and poly(urethane) resins.
  • the moulding composition can comprise a predominant proportion, which can be equal to or greater than 80%, preferably equal to or greater than 90%, of a casting aggregate.
  • the said aggregate can be composed of fresh or recycled casting sand.
  • siliceous sands zirconium sands, olivine sands, chromite sands, and the like.
  • a majority of the grains in particular at least 80% by weight of the grains, have a particle size distribution (fineness number) of between 45 and 140 AFS (according to the American Foundry Society United States standard).
  • the moulding composition according to the invention comprising a predominant proportion of casting aggregate, comprises: 0.1 to 40% of organic binder, by weight of the casting aggregate, and 0.1 to 40% of diacetal, by weight of the organic binder.
  • the diacetal and the organic binder are as defined above.
  • the said composition comprises from 0.1 to 5%, preferably from 0.6 to 4.5%, of organic binder, by weight of the aggregate.
  • the invention also relates to the use of the moulding composition described above in the manufacture of casting moulds and/or cores.
  • the invention relates to the use of the said moulding composition in the manufacture of casting moulds and/or cores by a process of cold box type or also by a process of cold curing type ("no bake" process).
  • the said processes are characterized in that they comprise a stage consisting in placing, in a casting pattern, a composition according to the invention.
  • compositions of the invention are used to prepare ordinary sand-based casting forms, it is possible, for example, to carry out the preparation according to the following stages:
  • a casting mixture comprising an aggregate (for example, sand) and a binder is formed; - the casting mixture is introduced into a pattern in order to give it the desired shape; the form is left to acquire minimum mechanical strength in the mould; and the form is removed from the mould and is allowed to continue its hardening in order to obtain a solid hard casting form.
  • aggregate for example, sand
  • the casting mixture can also comprise other components conventional in the field, such as silanes, iron oxides or decoring agents.
  • the casting mixture can, for example, be prepared according to the Technical Recommendation of the BNIF, No. 481 (December 1999).
  • a mixture comprising approximately half the amount of casting aggregate, the binder and the additive according to the invention is prepared and then the other half of the aggregate and the curing catalyst are added to this mixture.
  • the lifetime of the compositions of the examples was evaluated according to the Technical Recommendation of the BNIF, No. 482 (December 1999). The evaluation is obtained from the flexural strengths, measured on a series of test specimens prepared at regular time intervals and subsequently stored for 24 h in a confined atmosphere.
  • the flexural strengths are recorded on a graph as a function of the times at which the test specimens are prepared.
  • the lifetime value is the abscissa of the point corresponding to a strength equal to 75% of the maximum strength.
  • the fresh siliceous sand used is the sand LA 32 sold by Sifraco having a fineness number of 55-60 AFS.
  • the phenolic resin is the Kalyphen® 100 resin sold by Ashland Avebene (formaldehyde-phenolic resin of resol type).
  • the acid catalyst is SP25, a xylenesulphonic acid equivalent to 100% of PTSA, sold by Ashland Avebene.
  • the mixtures of sands and binders are prepared according to the Technical Recommendation of the BNIF, No. 481.
  • a weight of 3000 g of sand is mixed in a room climatically controlled at 23 °C with 72 g of phenolic resin and is then kneaded for 2 minutes with a conventional mixer (sand 1).
  • the two sand parts are subsequently introduced into the two compartments of a rapid mixer and then kneaded for 10 seconds.
  • a moulding composition comprising 100 parts of sand, 1.2 parts of resin and 0.48 part of catalyst is obtained.
  • Comparative Example 1 The conditions of Comparative Example 1 are repeated but using a phenolic resin comprising 5% by weight of 1,1,2,2-tetramethoxyethane (TME).
  • TAE 1,1,2,2-tetramethoxyethane
  • the said phenolic resin is prepared by adding, with stirring, 3.6 g of TME dropwise to 68.4 g of resin in order to obtain 72 g of resin.
  • Comparative Example 1 The conditions of Comparative Example 1 are repeated but using a phenolic resin comprising 10% by weight of TME.
  • the said phenolic resin is prepared by adding, with stirring, 7.2 g of TME dropwise to 64.8 g of resin in order to obtain 72 g of resin.
  • the time shown is the waiting time before preparing the test specimens.
  • the start of the times corresponds to the contacting of the sands 1 and 2.
  • compositions of the invention exhibit a better flexural strength and consequently a better lifetime.
  • the lifetime of the additive-free casting composition is 15 minutes, whereas it is 18 minutes with the addition of 5% of TME.
  • the fresh siliceous sand used is the sand LA 32 sold by Sifraco having a fineness number of 55-60 AFS.
  • the phenolic resin used is the Pentex® 34V44 resin, sold by H ⁇ ttenes Albertus France (phenolic resin of novolac type in solution in a solvent system).
  • the curing agent used is Pentex® 35V9234V44, sold by H ⁇ ttenes Albertus France (MDI polymer in solution in a solvent system).
  • Pentex® 36009 sold by H ⁇ ttenes Albertus France (phenylpropylpyridine tertiary amine).
  • a weight of 3000 g of sand is mixed in a room climatically controlled at 23°C with 36 g of phenolic resin comprising 1.44 g of catalyst and is then kneaded for 2 minutes with a conventional mixer (sand 1).
  • the two sand parts are subsequently introduced into the two compartments of a rapid mixer and then kneaded for 10 seconds.
  • a moulding composition comprising 100 parts of sand, 0.6 part of phenolic resin comprising 0.024 parts of catalyst and 0.6 part of curing agent is obtained.
  • Comparative Example 2 The conditions of Comparative Example 2 are repeated but using a phenolic resin comprising 10% by weight of TME.
  • the said phenolic resin is prepared by adding, with stirring, 3.6 g of TME dropwise to 32.4 g of resin in order to obtain 36 g of resin.
  • the time shown is the waiting time before preparing the test specimens.
  • the start of the times corresponds to the contacting of the sands 1 and 2.
  • compositions of the invention exhibit a better flexural strength and consequently a better lifetime.
  • the lifetime of the additive-free casting composition is 2 minutes 10 seconds, whereas it is 5 minutes with the addition of 10% of TME.
  • the fresh silica sand used is LA 32 sand marketed by Sifraco having a fineness index of 55-60 AFS.
  • the phenolic resin used is Isocure® 352 resin marketed by Ashland Avebene.
  • the hardener used is Isocure 362® marketed by Asland Avebene (4,4'- methane diphenyl diisocyanate).
  • the catalyst used is dimethyl isopropyl amine.
  • a mass of 80 kg of sand is mixed in a temperature controlled room at 23 °C with 480 g of resin (Part 1) and 480 g of hardener (Part 2) and the combination is mixed for 3 minutes using a batch mixer (Sigma blade arm mixer, vertical shaft).
  • a moulding composition comprising 100 parts of sand, 0.6 parts of phenolic resin at 0.6 parts of hardener.
  • comparative example 3 The conditions of comparative example 3 are repeated but using a phenolic resin (Part 1 ) containing 5 % by weight of TME.
  • the said phenolic resin is prepared by adding dropwise with stirring 24 g of TME (marketed by Clariant) with 456 g of resin to obtain 480 g of resin.
  • Example 4 The conditions of example 4 are repeated but using a phenolic resin containing 10 % by weight of TME.
  • the conditions of comparative example 3 are repeated but using a phenolic resin containing 5 % by weight of tetramethoxypropane (TMP).
  • TMP tetramethoxypropane
  • the said resin is prepared by adding dropwise with stirring 24 g of TMP (Aldrich) with 456 g of resin to obtain 480 g of resin.
  • Test specimens were prepared by shooting (5 bar) with a R ⁇ perwerk Hl 6 core shooter using a box with 7 Dietert (8 cm * 1 cm * 1 cm) bend specimen cavities and a 10 mm diameter filter (technical recommendations of B.N.I.F. Nos. 484 and 485).
  • Gassing was carried out using a Laempe LlOO gassing machine, with a mixture of dimethylisopropylamine gas (mass content 0.1 % of the weight of sand) in air at 0.5 bar and for 20 seconds.
  • the bend tests were performed using an M&O press, a 500 N electronic ring, a loading rate of 2 mm/min, the top of the specimen being positioned frontward during the bend tests.
  • the specimens were prepared by varying the potlife before shooting and gassing the moulding compositions described above: immediately after mixing, half an hour after mixing, one hour after mixing, two hours after mixing and three hours after mixing. The specimens thus prepared were then bend tested one hour after preparation. The results of these measurements are given in Table 3.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

L'invention concerne l'utilisation d’au moins un diacétal en tant qu’additif dans la préparation d’une composition de moulage, et les compositions qui le comprennent.
PCT/IB2006/000447 2005-03-04 2006-02-27 Composition de coulage WO2006092716A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0502196 2005-03-04
FR0502196A FR2882668B1 (fr) 2005-03-04 2005-03-04 Composition pour fonderie

Publications (1)

Publication Number Publication Date
WO2006092716A1 true WO2006092716A1 (fr) 2006-09-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010032734A1 (de) 2010-07-30 2012-02-02 Ashland-Südchemie-Kernfest GmbH Bindemittelsystem auf Polyurethanbasis zur Herstellung von Kernen und Gießformen unter Verwendung cyclischer Formale, Formstoffmischung und Verfahren
DE102014117284A1 (de) 2014-11-25 2016-05-25 Ask Chemicals Gmbh Polyurethan-Bindemittelsystem zur Herstellung von Kernen und Gießformen, Formstoffmischung enthaltend das Bindemittel und ein Verfahren unter Verwendung des Bindemittels
WO2017075351A1 (fr) 2015-10-30 2017-05-04 Ask Chemicals, L.P. Liant polyuréthane contenant un solvant alcoolique
WO2021049150A1 (fr) * 2019-09-09 2021-03-18 花王株式会社 Composition de liant pour former un moule

Citations (4)

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US4116916A (en) * 1976-10-26 1978-09-26 International Minerals & Chemical Corp. Foundry resin components
EP0255608A2 (fr) * 1986-07-05 1988-02-10 Herberts Gesellschaft mit beschränkter Haftung Composition de revêtement thermodurcissable et son utilisation
US4929649A (en) * 1986-11-20 1990-05-29 Huttenes-Albertus Chemische Werke Gmbh Cold-setting moulding binders and their use (phenols and gaseous acetals)
EP0399289A2 (fr) * 1989-05-13 1990-11-28 Herberts Gesellschaft mit beschränkter Haftung Compositions de revêtemment thermodurcissables et leur utilisation pour revêtir des pellicules de finition et des bords sans fin

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US4013629A (en) * 1975-02-21 1977-03-22 Krause Milling Company Art of catalyzing the reaction between a polyol and a polyaldehyde
DE3624558A1 (de) * 1985-07-29 1987-02-05 Kao Quaker Co Formbindemittelzusammensetzung und verfahren zur herstellung einer giessform

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US4116916A (en) * 1976-10-26 1978-09-26 International Minerals & Chemical Corp. Foundry resin components
EP0255608A2 (fr) * 1986-07-05 1988-02-10 Herberts Gesellschaft mit beschränkter Haftung Composition de revêtement thermodurcissable et son utilisation
US4929649A (en) * 1986-11-20 1990-05-29 Huttenes-Albertus Chemische Werke Gmbh Cold-setting moulding binders and their use (phenols and gaseous acetals)
EP0399289A2 (fr) * 1989-05-13 1990-11-28 Herberts Gesellschaft mit beschränkter Haftung Compositions de revêtemment thermodurcissables et leur utilisation pour revêtir des pellicules de finition et des bords sans fin

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010032734A1 (de) 2010-07-30 2012-02-02 Ashland-Südchemie-Kernfest GmbH Bindemittelsystem auf Polyurethanbasis zur Herstellung von Kernen und Gießformen unter Verwendung cyclischer Formale, Formstoffmischung und Verfahren
WO2012025084A1 (fr) 2010-07-30 2012-03-01 Ask Chemicals Gmbh Système de liant à base de polyuréthanne permettant la fabrication de noyaux et de moules au moyen de formals cycliques, mélange de matières à mouler et procédé
DE102014117284A1 (de) 2014-11-25 2016-05-25 Ask Chemicals Gmbh Polyurethan-Bindemittelsystem zur Herstellung von Kernen und Gießformen, Formstoffmischung enthaltend das Bindemittel und ein Verfahren unter Verwendung des Bindemittels
WO2017075351A1 (fr) 2015-10-30 2017-05-04 Ask Chemicals, L.P. Liant polyuréthane contenant un solvant alcoolique
WO2021049150A1 (fr) * 2019-09-09 2021-03-18 花王株式会社 Composition de liant pour former un moule
CN113891771A (zh) * 2019-09-09 2022-01-04 花王株式会社 铸型造型用粘结剂组合物
CN113891771B (zh) * 2019-09-09 2024-05-10 花王株式会社 铸型造型用粘结剂组合物

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FR2882668A1 (fr) 2006-09-08
FR2882668B1 (fr) 2007-06-15

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