WO2018047893A1 - Composition de résine pour moulage en coquille et sable enrobé de résine obtenu à l'aide de celle-ci - Google Patents

Composition de résine pour moulage en coquille et sable enrobé de résine obtenu à l'aide de celle-ci Download PDF

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WO2018047893A1
WO2018047893A1 PCT/JP2017/032211 JP2017032211W WO2018047893A1 WO 2018047893 A1 WO2018047893 A1 WO 2018047893A1 JP 2017032211 W JP2017032211 W JP 2017032211W WO 2018047893 A1 WO2018047893 A1 WO 2018047893A1
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Prior art keywords
resin
parts
resin composition
phenol resin
phosphate
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PCT/JP2017/032211
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English (en)
Japanese (ja)
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鉄山
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旭有機材株式会社
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Priority to CN201780054798.XA priority Critical patent/CN109689245B/zh
Priority to MX2019002523A priority patent/MX2019002523A/es
Priority to JP2018538459A priority patent/JP6945537B2/ja
Publication of WO2018047893A1 publication Critical patent/WO2018047893A1/fr

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings

Definitions

  • the present invention relates to a resin composition for a shell mold and a resin coated sand obtained using the same, and more particularly to a resin composition for a shell mold capable of improving the properties of a resin coated sand used for molding a mold.
  • the present invention relates to a resin-coated sand that can be advantageously produced by using a mold resin composition for shell molds and having excellent properties.
  • a phenol resin composition containing a phenol resin as a resin binder (binder component) is used as a binder and kneaded with refractory particles (aggregate / foundry sand).
  • a shell mold mold obtained by forming a resin-coated sand (RCS) formed by forming a binder layer on the surface of such a refractory particle and then molding it into a desired shape is generally used. It is coming.
  • RCS resin-coated sand
  • Patent Document 1 JP-A-11-244990 (Patent Document 1), a phenolic ester, an oxidizing agent, and an organic carboxylic acid metal are blended in a phenol resin.
  • An RCS for a mold obtained by coating the surface of sand grains with a binder prepared as described above has been clarified.
  • the target RCS for molds is produced by preparing a binder using tributyl phosphate as a phosphate ester.
  • the mold obtained using RCS has problems such as a low decay rate in a low temperature region lower than 350 ° C., a slow curing rate when molding the mold, and insufficient blocking resistance of RCS. is doing.
  • Patent Document 2 discloses a resin composition for a shell mold containing a phenol resin and an aromatic condensed phosphate, and is obtained using such a resin composition. It is said that the mold collapsed by RCS is improved in mold disintegration after casting. However, even in such a mold, there is a problem that the decay rate in a low temperature region lower than 350 ° C. is low, and since the fusion point of RCS is low, blocking of RCS is likely to be caused. In addition, the curing speed at the time of mold making is slow, and there is a risk of causing problems in molding workability.
  • the present invention has been made in the background of such circumstances, and the problem to be solved is to improve the mold disintegration property in a low temperature region and to fix the fusion point of RCS.
  • mold molding workability and casting of a casting The object is to provide an RCS with excellent workability.
  • the present inventor has found that the phenol resin does not contain a halogen in the molecule and has a specific content.
  • a P content and a non-halogen phosphate having a specific viscosity to constitute a resin composition for shell molds.
  • the melt of RCS obtained using such a resin composition as a binder is used. Since the landing point can be effectively increased and the disintegration property in the low temperature region of the mold obtained using such RCS can be advantageously increased, the present invention has been completed. is there.
  • the present invention has been completed based on the above-described knowledge, and the gist of the present invention is that in a resin composition for a shell mold containing a phenol resin as a resin caking component, halogen is contained in the molecule.
  • Non-halogen phosphates comprising one or more phosphate ester compounds that do not contain a bond, a P content of 14% or more, and a viscosity of 150 mPa ⁇ s / 25 ° C. or more
  • the resin composition for shell molds is characterized by being caulked.
  • the resin composition for a shell mold according to the present invention a configuration in which at least one of the phosphate ester compounds is an aliphatic condensed phosphate ester is adopted. Become.
  • the non-halogen phosphates are 80% by mass or more of aliphatic condensed phosphates and 20% by mass or less of aromatic phosphates and / or aromatics. Condensed phosphate ester.
  • the resin composition for a shell mold according to the present invention desirably contains the non-halogen phosphate in a proportion of 1 to 50 parts by mass with respect to 100 parts by mass of the phenol resin. .
  • a novolac type phenol resin and / or a resol type phenol resin is advantageously used, and there is a case where the novolac type phenol resin and the resol type phenol resin are used in combination.
  • the shell mold resin composition as described above is used as a binder, and the surface of the refractory aggregate is covered with the binder layer.
  • Resin coated sand (RCS) is also targeted.
  • the binder layer desirably contains a lubricant and / or a silane coupling agent.
  • the resin composition for a shell mold is composed of at least one of a halogen-free phosphate ester compound together with a predetermined phenol resin, and has a specific P content and a specific viscosity. Since the non-halogen phosphate ester is contained, when the RCS is produced using such a resin composition as a binder, the strength of the mold formed from the obtained RCS The RCS fusion point can be effectively increased without lowering the RCS, and the blocking resistance of the RCS can be advantageously improved. In addition, the RCS can be molded using the RCS. The improvement of the disintegration property in the low-temperature region of the mold obtained in this way can be advantageously achieved.
  • a coating of a binder made of the resin composition for a shell mold according to the present invention is applied.
  • a mold is used.
  • the curing rate of the mold to be molded can be effectively increased, so that the handling property can be effectively improved in the molding of a mold using such RCS. Since there is no need to change the molding temperature and molding time in order to obtain the desired mold characteristics, the molding workability can be advantageously improved.
  • the phenol resin to be contained as the resin caking component is, as is well known, an acidic catalyst or a basic compound of phenols and aldehydes.
  • Solid or liquid condensation products obtained by reacting in the presence of a catalyst (including those in the form of varnish and emulsion), novolak type or resole depending on the type of catalyst used It is called a mold, and is a phenol resin that exhibits thermosetting properties by heating in the presence or absence of a predetermined curing agent or curing catalyst.
  • the phenols used as raw materials for such phenol resins mean phenol and phenol derivatives.
  • alkylphenols such as cresol, xylenol, p-tert-butylphenol, nonylphenol, etc.
  • Resorcinol, bisphenol F, polyphenols such as bisphenol A and the like, and mixtures thereof can be mentioned, and one of them is used alone or in combination of two or more Will be.
  • aldehydes examples include formalin in the form of an aqueous formaldehyde solution, paraformaldehyde, trioxane, acetaldehyde, paraaldehyde, propionaldehyde, and other known aldehyde compounds as appropriate. Can be used. These aldehydes can be used alone or in combination of two or more.
  • the novolak-type phenol resin used in the present invention is, as is well known, using the above-described phenols and aldehydes, an acidic catalyst, for example, an inorganic acid such as hydrochloric acid, sulfuric acid, phosphoric acid, It is formed by a condensation reaction with an organic acid such as oxalic acid, paratoluenesulfonic acid, benzenesulfonic acid, xylenesulfonic acid, or an acidic substance such as zinc oxide, zinc chloride, magnesium oxide, or zinc acetate.
  • an acidic catalyst for example, an inorganic acid such as hydrochloric acid, sulfuric acid, phosphoric acid, It is formed by a condensation reaction with an organic acid such as oxalic acid, paratoluenesulfonic acid, benzenesulfonic acid, xylenesulfonic acid, or an acidic substance such as zinc oxide, zinc chloride, magnesium oxide, or zinc acetate.
  • the mixing molar ratio (F / P) of the aldehydes (F) and the phenols (P) is appropriately selected according to the type of the reaction catalyst used, but preferably It will be selected within the range of 0.55 to 0.80.
  • the resol type phenol resin is formed by subjecting the above phenols and aldehydes to a condensation reaction with a known basic catalyst in the same manner as before.
  • a known basic catalyst alkali metal or alkaline earth metal hydroxides such as sodium hydroxide and calcium hydroxide, alkaline earth metal oxides, dimethylamine, triethylamine, butylamine can be used.
  • amines such as dimethylbenzylamine and naphthalenediamine, ammonia, hexamethylenetetramine, and other divalent metal naphthenates and divalent metal hydroxides can be used.
  • the blending molar ratio (F / P) of aldehydes and phenols in such a condensation reaction is appropriately selected according to the type of reaction catalyst used therefor, but generally 1.1 to It will be selected within the range of 4.0.
  • both the novolac type phenol resin and the resol type phenol resin obtained as described above are advantageously used together,
  • a resol type phenolic resin can function as a curing agent for a novolac type phenolic resin, and can also function as a component capable of improving characteristics such as bending strength of a mold.
  • a use ratio within the range of A: B 30: 70 to 70:30, particularly 40:60 to 60:40, is advantageously employed.
  • the use ratio of the resol type phenol resin exceeds 95% by mass with respect to the total amount of the novolac type phenol resin and the resol type phenol resin, Accordingly, when the usage ratio of the novolac type phenol resin is less than 5% by mass, it is difficult to uniformly mix these two types of phenol resins, so that the resin composition for shell mold ( A problem that the strength of the mold as a whole is reduced.
  • the use rate of the resol type phenol resin is less than 5% by mass and the use rate of the novolac type phenol resin exceeds 95% by mass, the novolak cannot be cured with the resol type phenol resin.
  • the amount of phenolic resin increases, and the excess novolac phenolic resin remains uncured, making it difficult to achieve complete curing of the resin composition (binder) for shell molding. There is a risk of inviting.
  • a halogen-free non-halogen phosphate ester is contained together with the above-described phenol resin, where the non-halogen phosphate ester is , It is composed of one or more halogen-free phosphate ester compounds in which no halogen (atom) is bonded in the molecule.
  • a mold is molded using RCS using the resin composition for shell mold as a binder, or a molten metal is cast using the molded mold.
  • halogen compounds are not generated. For this reason, molds and peripheral devices may be corroded by halogen compounds generated by decomposition. Advantages such as not being triggered can be enjoyed.
  • the P (phosphorus element) content is 14% or more, preferably 15% or more, more preferably 18% or more and 30% or less, and
  • the viscosity is 150 mPa ⁇ s / 25 ° C. or higher, preferably 300 mPa ⁇ s / 25 ° C. or higher, more preferably 500 mPa ⁇ s / 25 ° C. or higher, more preferably 800 mPa ⁇ s / 25 ° C. or higher and 3000 mPa ⁇ s / 25 ° C. or lower.
  • P content (%) in the halogen-free phosphate compound is specifically calculated by the following formula.
  • P content (%) [(Atomic weight of phosphorus element in substance ⁇ number of phosphorus elements) / (Molecular weight of the substance)] ⁇ 100
  • non-halogen phosphates having a P content of less than 14% affects the disintegration of the template and causes problems such as an insufficient disintegration rate in the low temperature region. Become.
  • non-halogen phosphates having a viscosity of less than 150 mPa ⁇ s / 25 ° C. are used, the fusion point of RCS is lowered, and RCS blocking is likely to occur, and mold molding is performed. As the curing speed at the time decreases, problems such as deterioration in the workability of molding will be caused.
  • the at least one phosphate ester compound constituting the non-halogen phosphates used in the present invention is preferably an aliphatic condensed phosphate ester, in which an aliphatic condensed phosphate ester is used. Is preferably contained so as to be contained in an amount of 80% by mass or more, more preferably 90% by mass or more of the non-halogen phosphate.
  • the mechanism of the influence on the disintegration property of the template by constituting non-halogen phosphates with aliphatic condensed phosphates as the main component has not yet been elucidated. It has been found that the use of the condensed phosphate ester makes the template disintegration very high especially in the low temperature region (300 to 350 ° C.).
  • an aromatic phosphate ester and an aromatic condensed phosphate ester be used in combination with the aliphatic condensed phosphate ester.
  • the disintegration of the template in a high temperature region 400 ° C. or higher
  • the P content of the non-halogen phosphates is 14% or more and the viscosity is 150 mPa ⁇ s / 25 ° C.
  • the aromatic phosphate ester and the aromatic condensed phosphate ester are used.
  • it can be incorporated as a component of the non-halogen phosphate ester, and the aliphatic phosphate ester is added as a component of the non-halogen phosphate ester.
  • the aromatic phosphate esters, aromatic condensed phosphate esters and aliphatic phosphate esters contain a halogen (atom) in their molecules.
  • the P content (%) is the P content (%) of each phosphate ester compound.
  • Each is obtained as the sum of numerical values obtained by multiplying the blending ratio of each phosphate compound.
  • the viscosity (25 degreeC) of such non-halogen-type phosphate ester which consists of multiple types of phosphate ester compounds will be calculated
  • the aliphatic condensed phosphate ester suitably used in the present invention is an alkyl phosphate having an oligomer form, and specifically includes oligomer ethyl ethylene phosphate, modified oligomer ethyl ethylene phosphate, oligomer ethyl ethylene phosphate as a main component.
  • Such aliphatic condensed phosphate esters are also commercially available, for example, “Fyrol PNX” (manufactured by ICL JAPAN), “Fyrol PNX-LE” ( ICL JAPAN Co., Ltd.), “Fyrol HF-5” (ICL JAPAN Co., Ltd.), etc. will be obtained from the market and used.
  • Such an aliphatic condensed phosphate ester can be conceptually represented by the following formula 1. [Wherein R 1 represents an alkyl group having 1 to 4 carbon atoms, and all R 1 may be the same or different. X represents an alkylene group having 1 to 3 carbon atoms, and n represents an integer of 1 to 10. ]
  • “DAIGUARD-880” manufactured by Daihachi Chemical Industry Co., Ltd.
  • DAIGUARD-880 can be used as aliphatic condensed phosphate esters obtained from the market.
  • aromatic phosphate used in combination with the above aliphatic condensed phosphate ester include triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, 2- Ethylhexyl diphenyl phosphate, t-butylphenyl diphenyl phosphate, bis- (t-butylphenyl) phenyl phosphate, tris- (t-butylphenyl) phosphate, isopropylphenyl diphenyl phosphate, bis- (isopropylphenyl) diphenyl phosphate, tris- (isopropyl Phenyl) phosphate and the like.
  • select commercially available products such as “CR-733S”, “CR-747”, “PX-200”, “CR-741” manufactured by Daihachi Chemical Industry Co., Ltd. Can be used.
  • aliphatic phosphate ester which is a component used together with the aliphatic condensed phosphate ester, specifically, trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, methyl diethyl phosphate, methyl dibutyl phosphate, ethyl dibutyl Mention may be made of trialkyl phosphates such as phosphates.
  • the non-halogen phosphates as described above are generally in a ratio of 1 to 50 parts by mass, preferably 2 to 30 parts per 100 parts by mass of the phenol resin. It is used in a mass part, more preferably 3 to 20 parts by mass. If the amount of the non-halogen phosphates used is too small, the characteristic effect of the present invention, in particular, the effect of improving disintegration is not sufficiently obtained, and if the amount used is too large, There is a possibility that the curing speed at the time of mold making may be lowered, and there is a problem that the fusion point of RCS is lowered and blocking is easily caused, and the amount of smoke generated at the time of molding may be increased.
  • non-halogen phosphates can be added during the manufacture of phenolic resins, or non-halogen phosphates can be added after the manufacture of such phenolic resins for the intended shell mold.
  • a non-halogen phosphate ester is added separately from the phenolic resin (shell mold resin composition) to coat the surface of the refractory particles.
  • a method in which non-halogen phosphates are introduced into the binder layer can also be employed.
  • the resin composition for a shell mold according to the present invention may be appropriately blended with various conventionally used additives for the purpose of improving the physical properties of RCS and molds, if necessary.
  • various conventionally used additives for the purpose of improving the physical properties of RCS and molds, if necessary.
  • waxes such as paraffin wax, synthetic polyethylene wax, and montanic acid wax
  • fatty acid amides such as stearic acid amide, oleic acid amide, and erucic acid amide
  • Alkylene fatty acid amides such as acid amide and ethylene bis-stearic acid amide
  • stearic acid, stearyl alcohol, metal stearate, lead stearate, zinc stearate, calcium stearate, magnesium stearate, stearic acid monoglyceride, stearyl stearate, cured Oil or the like can be added.
  • a coupling agent that reinforces the bond between the refractory particles and the shell mold resin composition is also effective to include a coupling agent that reinforces the bond between the refractory particles and the shell mold resin composition.
  • a silane coupling agent, a zircon coupling agent, a titanium coupling agent, or the like is used. I can do it.
  • a release agent paraffin, wax, light oil, machine oil, spindle oil, insulating oil, waste oil, vegetable oil, fatty acid ester, organic acid, fine graphite particles, mica, meteorite, fluorine release agent, silicone release agent Molding agents and the like can also be used.
  • Each of these additives is used in a ratio of about 0.1 to 10 parts by mass, preferably about 0.5 to 5 parts by mass, with respect to 100 parts by mass of the phenol resin.
  • these additives may be added at the time of manufacture of the resin composition for shell molds, or may be added and blended separately from the resin composition for shell molds during the manufacture of RCS.
  • the amount of the resin composition for the shell mold according to the present invention is appropriately determined in consideration of the type of resin used and the required mold strength. In general, it is within the range of about 0.2 to 10 parts by weight, preferably 0.5 to 8 parts by weight, with respect to 100 parts by weight of the refractory particles. More preferably, it is within the range of 1 to 5 parts by mass.
  • refractory particles (aggregate) in which such a resin composition for a shell mold is kneaded conventionally known ones can be appropriately selected and used, and the kind thereof is defined in the present invention. In that case, there is no particular limitation. Since such a refractory particle is used as a base material for a mold, if it is an inorganic refractory particle having a particle size suitable for casting and mold formation (molding), it can be conventionally used. Any known inorganic particles that have been used for shell mold casting can be used.
  • refractory particles examples include olivine sand, zircon sand, chromite sand, alumina sand and other special sand, ferrochrome-based slag and ferronickel-based materials, in addition to commonly used dredged sand.
  • Slag-type particles such as slag and converter slag, mullite-type artificial particles such as Niiga Cera beads (product name: manufactured by ITOCHU CERATECH Co., Ltd.), or regenerated particles recovered and regenerated after casting, etc.
  • it will be used alone or in combination of two or more.
  • the manufacturing method is not particularly limited, and a dry hot coating method, a semi-hot coating method, a cold coating method, Conventionally known methods such as a powder solvent method can be employed.
  • a dry hot coating method such as a whirl mixer or a speed mixer.
  • an aqueous solution of a predetermined curing agent such as hexamethylenetetramine or a curing accelerator is added, and the bulk content is separated into particles by cooling with air, and then steered.
  • Adoption of a so-called dry hot coating method in which calcium phosphate (lubricant) is added is recommended.
  • the timing for kneading the resin binder (phenolic resin) and the curing agent / curing accelerator constituting the shell mold resin composition according to the present invention with the refractory particles is appropriately selected based on the knowledge of those skilled in the art. In addition to being kneaded sequentially, it can be kneaded in an appropriate combination.
  • the target mold is molded under heating in order to heat and cure the RCS.
  • the heating molding method is not particularly limited, and any conventionally known method can be advantageously used.
  • the RCS as described above is filled in a molding die heated to about 150 ° C. to 300 ° C. having a desired shape space for giving a target mold by a gravity dropping method, a blowing method, or the like, and cured. Thereafter, the target casting mold can be obtained by removing the cured mold from the mold. And in the casting_mold
  • each RCS is measured in accordance with JACT test method: C-1 (fusion point test method). That is, a RCS to be measured is quickly sprinkled on a metal rod having a temperature gradient, and a nozzle having a diameter of 1.0 mm that moves along the guide rod at a position 10 cm away from the metal rod 60 seconds later. Then, while air is blown at an air pressure of 0.1 MPa, the nozzle is reciprocated once from the low temperature portion to the high temperature portion of the metal rod to blow off the RCS on the metal rod.
  • JACT test method JACT test method
  • the fusion point (degreeC) of RCS made into the measurement object is calculated
  • a JIS test piece (width: 10 mm ⁇ thickness: 10 mm ⁇ length: 60 mm, firing time: 250 ° C. ⁇ 60 seconds) was prepared from each RCS, and the obtained JIS formula After wrapping the test pieces (5 pieces) in double aluminum foil, they are placed in a drying furnace at a predetermined temperature (300 ° C., 350 ° C. or 400 ° C.) and heated for 30 minutes. Thereafter, the test piece is taken out and cooled to room temperature, and then the bending strength is measured.
  • the collapse rate (%) for each RCS is calculated from the average value of each test piece according to the following formula.
  • Collapse rate (%) [ ⁇ Folding strength at normal temperature ⁇ Folding strength after 30 minutes treatment at a predetermined temperature (300 ° C., 350 ° C. or 400 ° C.) ⁇ ⁇ Bending strength at normal temperature] ⁇ 100
  • Condensed phosphoric acid ester [main component: phenylene bis (phenylcresol phosphate), trade name: CR-733S, manufactured by Daihachi Chemical Industry Co., Ltd.] (P content 10.9%, viscosity 600 mPa ⁇ s / 25 ° C.) was added to obtain 945 parts of a novolak type phenol resin A10.
  • BPDP t-butylphenyldiphenyl phosphate
  • -Resin production example 15- A reaction vessel equipped with a thermometer, a stirrer, and a condenser was charged with 680 parts of phenol, 535 parts of 47% formalin, and 101 parts of hexamethylenetetramine, and the temperature was raised to 70 ° C. in about 60 minutes. The reaction was continued for 5 hours. Thereafter, the reaction solution was heated to 90 ° C. and dehydrated under reduced pressure, and then 78 parts of an aliphatic condensed phosphate ester (trade name: Fyrol HF-5, manufactured by ICL JAPAN Co., Ltd.) was added to form a resol type phenol resin. 778 parts of B2 were obtained.
  • an aliphatic condensed phosphate ester trade name: Fyrol HF-5, manufactured by ICL JAPAN Co., Ltd.
  • -Resin production example 20- A reaction vessel equipped with a thermometer, a stirrer, and a condenser was charged with 680 parts of phenol, 535 parts of 47% formalin, and 101 parts of hexamethylenetetramine, and the temperature was raised to 70 ° C. in about 60 minutes. The reaction was continued for 5 hours. Thereafter, the reaction solution was heated to 90 ° C. and dehydrated under reduced pressure, and then an aromatic condensed phosphate ester [main component: phenylene bis (phenylcresol phosphenoate), trade name: CR-733S, Daihachi Chemical Industry, Ltd. 78 parts by product] was added to obtain 778 parts of resol type phenol resin B7.
  • main component phenylene bis (phenylcresol phosphenoate), trade name: CR-733S, Daihachi Chemical Industry, Ltd. 78 parts by product
  • -Resin production example 21- A reaction vessel equipped with a thermometer, a stirrer, and a condenser was charged with 680 parts of phenol, 535 parts of 47% formalin, and 101 parts of hexamethylenetetramine, and the temperature was raised to 70 ° C. in about 60 minutes. The reaction was continued for 5 hours. Thereafter, the reaction solution was dehydrated under reduced pressure while being heated to 90 ° C., and then 78 parts of aromatic phosphate t-butylphenyldiphenyl phosphate (BPDP) was added to obtain 778 parts of resol type phenol resin B8. It was.
  • BPDP aromatic phosphate t-butylphenyldiphenyl phosphate
  • Example 9 to Example 13- In the same manner as in Example 1, except that 52.5 parts of the novolak type phenolic resin A1 and 52.5 parts of each of the novolak type phenolic resins A2 to A6 were used, the RCS 9 to 13 were used. Respectively. The obtained RCSs 9 to 13 were used to measure the fusion point, the bend (300 gf) amount, and the disintegration rate, respectively. The results obtained are shown in Table 2 below.
  • Example 14 to Example 18 7000 parts of fresh sand (Australian natural cinnabar, trade name: Flattery) heated to 150 ° C., 52.5 parts of the above novolac type phenol resins A2 to A6 and 52.5 parts of the above resol type phenol resins B2 to B6 And knead until the sand is separated into individual particles with a speed mixer, add 7 parts of calcium stearate (manufactured by Nippon Oil & Fats Co., Ltd.) and mix for 15 seconds. By discharging, RCS14 to 18 were obtained. Then, using the obtained RCSs 14 to 18, measurement of the fusion point, measurement of the bend (300 gf) amount and measurement of the collapse rate were performed, and the obtained results are shown in Table 2 and Table 2 below. 3 shows.
  • Example 19 to Example 23- 26.25 parts of novolac type phenol resin A1, 26.25 parts of each of novolac type phenol resins A2 to A6, 26.25 parts of resol type phenol resin B1, and resol type phenol resin B2 RCS 19 to 23 were obtained in the same manner as in Example 14 except that 26.25 parts of each of B6 to B6 were used.
  • the obtained RCSs 19 to 23 were measured for the fusion point, the bend (300 gf) and the collapse rate, respectively, and the obtained results are shown in Table 3 below.
  • RCS 24 to 28 were obtained in the same manner as in Example 1 except that the novolak type phenol resin A2 was replaced with the novolak type phenol resins A1 and A10 to A13 in Example 1.
  • the obtained RCSs 24 to 28 were measured for the fusion point, the bend (300 gf) and the collapse rate, respectively, and the obtained results are shown in Table 4 below.
  • Example 14 Comparative Example 6 to Comparative Example 8-
  • Example 14 except that the novolak-type phenol resin A2 was replaced with the novolak-type phenol resin A1, A10, or A11 and the resol-type phenol resin B2 was replaced with the resol-type phenol resin B1, B7, or B8, and Example 14 Similarly, RCS29 to 31 were obtained. The obtained RCSs 29 to 31 were measured for the fusion point, the bend (300 gf) and the collapse rate, respectively, and the obtained results are shown in Table 4 below.

Abstract

L'invention concerne une composition de résine pour moulage en coquille, qui peut améliorer avantageusement la résistance de blocage de la RCS par l'élévation du point de fusion de la RCS, tout en améliorant la capacité de désintégration d'un moule dans une plage de basse température. L'invention concerne également une RCS qui est obtenue à l'aide de cette composition de résine pour moulage en coquille et présente une excellente aptitude à la formation et une excellente aptitude au façonnage de moulage. L'invention porte sur une composition de résine pour moulage en coquille, qui contient une résine phénolique comme composant de liant de résine, et qui contient en plus un ester d'acide phosphorique non halogéné qui est composé d'un ou de plusieurs composés d'ester d'acide phosphorique dans lesquels aucun atome d'halogène n'est lié dans chaque molécule, tout en ayant une teneur en P de 14 % ou plus et une viscosité de 150 mPa·s/25°C ou plus.
PCT/JP2017/032211 2016-09-08 2017-09-07 Composition de résine pour moulage en coquille et sable enrobé de résine obtenu à l'aide de celle-ci WO2018047893A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780054798.XA CN109689245B (zh) 2016-09-08 2017-09-07 壳模用树脂组合物和使用其得到的树脂覆膜砂
MX2019002523A MX2019002523A (es) 2016-09-08 2017-09-07 Composicion de resina para moldeo en cascara y arena recubierta de resina obtenida usando la misma.
JP2018538459A JP6945537B2 (ja) 2016-09-08 2017-09-07 シェルモールド用樹脂組成物及びそれを用いて得られるレジンコーテッドサンド

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JP2016-175214 2016-09-08
JP2016175214 2016-09-08

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WO2022220133A1 (fr) * 2021-04-15 2022-10-20 旭有機材株式会社 Composition de résine pour moules

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CN111360199A (zh) * 2020-04-08 2020-07-03 安徽羿维表面工程技术有限公司 合金铸造侧导板合金成分
WO2022220133A1 (fr) * 2021-04-15 2022-10-20 旭有機材株式会社 Composition de résine pour moules
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