CN102717024A - Epoxy resin double-component adhesion agent prepared by using cold box process as well as casting mixture and casting formed body - Google Patents
Epoxy resin double-component adhesion agent prepared by using cold box process as well as casting mixture and casting formed body Download PDFInfo
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Abstract
The invention discloses an epoxy resin double-component adhesion agent system prepared by using a cold box process. The epoxy resin double-component adhesion agent is characterized in that the adhesion agent system blows gaseous sulfur dioxide to cure. The adhesion agent system comprises the following components in parts by weight: (a) 1-40 parts of benzyl ether phenolic resin; (b) 0.1-10 parts of polyisocyanate; (c) 40-80 parts of epoxy resin; (d) 20-30 parts of acrylate; (e) 1-30 parts of ester with a high boiling point and/or a hydrocarbon diluent; and (f) 15-75 parts of organic peroxides. The weight-average molecular weight of the benzyl ether phenolic resin is in a range of 500-2000. With the adoption of the adhesion agent system, the defects that the cold box adhesion agent for curing the sulfur dioxide by blowing in the prior art has poor brittleness and poor temperature resistance can be overcome, so that the strength of a core sand mould is improved in a casting process of the core sand mould; the rejection ratio is reduced; the quality of a casting piece is improved; and meanwhile, the viscosity of the adhesion agent is reduced. The epoxy resin double-component adhesion agent system is beneficial to a casting process.
Description
Technical field
The present invention relates to binding agent, this binding agent is used for the casting resin sand compound, and air blowing attitude sulfur dioxide solidifies, and forms the core mould of making the cast metal foundry goods, is applicable to the various types of cast steels of casting field, cast iron and non-ferrous alloy spare.
Background technology
In foundary industry, cold-box process is meant with gas or the aerosol catalyst process of the instantaneous curing of catalytic resin sand at room temperature.Press the difference of gas or aerosol catalyst, can cold-box process be divided into amine method, SO2 method, CO2 resin method and methyl formate method.
SO2-furane resins method has been invented by France SPAIC company in 1971, be referred to as the Hardox method, is used for Foundry Production in 1975.Its technical process is: the activator that will contain peroxide adds in the core sand; When SO2 combines to generate SO3 with nascent oxygen that peroxide discharges during through core sand; SO3 generates sulfuric acid with the water that is dissolved in binding agent and the sand; Impel resin that the heat release polycondensation reaction takes place rapidly, core is hardened rapidly, domestic custom is called the SO2 method.Its binder system is formed: binding agent (furane resins), oxidant (methyl ethyl ketone peroxide), coupling agent (silane), catalyst (SO2).
SO2-epoxy resin method was used for producing in nineteen eighty-three, adopted a kind of dual-component binder, and component A is combined by epoxy resin and organic peroxide, and component B is added with acrylic acid modified dose of epoxy resin that is used for improving reactivity and setting rate.Compare with SO2-furane resins method, the up time of core sand is longer, has solved production problems such as core box fouling and sticking to mould basically, is fit to produce in enormous quantities.
U.S. Pat 4,518,723 disclose a kind of curable epoxy resin composition, and the methyl alcohol that it uses 80% Epon828,10% phenolic resins, 0.2%A-187Silane and 10% wherein is added with 20% tri methylol triacrylate;
A kind of foundry binders system is disclosed among the open CN1852782A " acrylate-free binders that contains epoxy resin and alkyl silicate " of China invention application; It will solidify in the presence of sulfur dioxide and oxidant, and this adhesive system comprises: (a) 40～80 parts by weight of epoxy resin; (b) fatty acid ester of 1～40 weight portion; (c) alkyl silicate of 1～10 weight portion; (d) oxidant of effective dose and (e) 0 part ethylenically unsaturated monomers or polymer;
A kind of foundry binders system is disclosed among the Chinese patent publication number CN1871080A " the cold-box process adhesive that contains epoxy resin, acrylic acid ester and some Arrcostabs "; It will solidify in the presence of sulfur dioxide and radical initiator, and this adhesive system comprises: (a) 20～70 parts by weight of epoxy resin; (b) 1～50 parts by weight of acrylic ester; (c) fatty acid alkyl esters of 1～30 weight portion; (d) oxidant of effective dose;
Disclosing a kind of foundry binders during Chinese patent publication number CN101484258A " uses epoxy-acrylate cold-box binder to prepare the method for erosion resistant foundry shapes " comprises: (a) 20～70 parts by weight of epoxy resin; (b) 5～50 parts by weight of acrylic esters; (c) silane of the organic functional of at least 3.0 weight %; (d) peroxide of effective dose.
Epoxy resin is a kind of thermosetting resin, has excellent cementability, mechanical performance and favorable manufacturability.Because shortcomings such as its property is crisp, anti-impact force differences, people in use usually add plasticizer, mainly are external plasticizations, but toughening effect is not remarkable, becomes the difficult problem that the restriction product is used.The viscosity of epoxy resin is general bigger simultaneously, usually reduces the viscosity of epoxy resin through the interpolation diluent, improves its processing performance.
The Chinese invention patent application CN200910265766.1 that the applicant submitted on December 31st, 2009 has overcome the defective that existing cold-box binder moisture-proof pattern of fever is poor, property is crisp, mechanical strength of resin is low, has improved mechanical strength of resin, has reduced the percent defective of casting article.The applicant further improves the technical scheme of this invention, so that binding agent obtains desirable viscosity and the sand mold sand core strength of Geng Gao.
Summary of the invention
The technical problem that the present invention solves is to reduce the viscosity of cold-box process epoxy adhesive, has the intensity of the core sand mold of free-running property and Geng Gao preferably so that be mixed with the casting model powder of binding agent.
The present invention proposes a kind of cold-box process epoxy resin dual-component binder, and this binder system air blowing attitude sulfur dioxide solidifies, and comprises by its weight:
(a) benzylic ether phenolic resins is 1～40 part
(b) PIC is 0.1～10 part
(c) epoxy resin is 40～80 parts
(d) acrylic acid ester is 20～30 parts
(e) high boiling ester and/or hydrocarbon diluent are 1～30 part
(f) organic peroxide is 15～75 parts,
Wherein, The consumption of benzylic ether phenolic resins be about epoxy resin 1～50% between; The consumption of PIC be about benzylic ether phenolic resins 1～30% between; And component I comprises acrylic acid ester of all parts and benzylic ether phenolic resins, PIC, epoxy resin and high boiling ester and/or the hydrocarbon diluent of part part; Component II comprises organic peroxide of all parts and epoxy resin, benzylic ether phenolic resins, PIC and the high boiling ester and/or the hydrocarbon diluent of all the other parts, and the weight average molecular weight of said benzylic ether phenolic resins is between 500～2000.
As preferred version, binder system comprises by its weight:
(a) benzylic ether phenolic resins is 5～30 parts
(b) PIC is 1～8 part
(c) epoxy resin is 45～60 parts
(d) acrylic acid ester is 20～30 parts
(e) high boiling ester and/or hydrocarbon diluent are 5～20 parts
(f) organic peroxide is 30～65 parts,
Wherein, the consumption of benzylic ether phenolic resins be about epoxy resin 5～35% between, the consumption of PIC be about benzylic ether phenolic resins 5～20% between.
Preferably, the weight average molecular weight of this benzylic ether phenolic resins is 600～1200.
In a kind of specific embodiment, it is made above-mentioned binding agent by following method: benzylic ether phenolic resins and PIC are reacted at 70～90 ℃, obtain polyurethane; Make gained polyurethane and epoxy resin carry out polymerisation, obtain polyurethane-modified epoxy resin at 110～150 ℃; This modified epoxy is mixed with all the other compositions, be distributed into component I, component II, prerequisite is that acrylic acid ester and peroxide are separated.
The invention still further relates to a kind of cast mixture, comprising: the above-mentioned bicomponent epoxy resin binding agent of casting aggregate and effective dose.The invention still further relates to casting body by above-mentioned cast mixture preparation.
The specific embodiment
In the present invention, with benzylic ether phenolic resins and PIC modified epoxy, so that the bonding agent that obtains has the adhesive strength and the toughness of raising.The consumption of benzylic ether phenolic resins and PIC is to be no more than the consumption of epoxy resin usually.Particularly, the consumption of benzylic ether phenolic resins be about epoxy resin 1～50% between, between preferred 5～35%, the consumption of PIC be about benzylic ether phenolic resins 1～30% between, preferably between 5～20%.
In the present invention, benzylic ether phenolic resins is that weight average molecular weight is 500～2000, is preferably between the 600-1200.Through selecting this specific benzylic ether phenolic resins for use, can reduce the viscosity of binding agent, make the casting model powder that is mixed with binding agent have the sand mold sand core strength of higher free-running property and Geng Gao.The preferred high ortho position benzylic ether phenolic resins that uses among the present invention, so-called high ortho position benzylic ether phenolic resins are meant neighbour/contrast greater than 1 phenolic resins, and major part is the phenolic resins at ortho position in other words.Use high ortho position benzylic ether phenolic resins can obtain curing rate faster.
The PIC that the present invention uses can be aliphatic polymeric isocyanate or aromatic poly-isocyanate, and the example of aliphatic polymeric isocyanate has isophorone vulcabond, hexamethylene diisocyanate.The example of aromatic poly-isocyanate has diphenyl methane-4; 4 '-vulcabond (abbreviating " MDI " as), thick diphenyl methane-4; 4 '-vulcabond (abbreviating thick " MDI " as) or poly methylene poly phenyl poly isocyanate (abbreviating " PAPI " as), or their composition.
Epoxy resin is the resin with epoxide group, makes the epoxy functionalities (epoxide group in each molecule) of epoxy resin be equal to or greater than 1.9, typically is 2.0-4.0.
The instance that can be used for epoxy resin of the present invention comprises the diglycidyl ether of (1) bisphenol-A, B, F; (2) epoxy phenolics; It is the glycidol ether of phenolic resins, (3) cycloaliphatic epoxy resin, (4) glycidyl amine type epoxy resin and (5) their mixture.
Epoxy resin (1) reacts through chloropropylene oxide and bisphenol compound in the presence of base catalyst and prepares.Through the control operation condition, and change the ratio of chloropropylene oxide and bisphenol compound, can prepare the product of different molecular weight.Epoxy resin based on the above-mentioned type of various bis-phenols can be obtained by the wide range of commercial channel.
Epoxy resin (2); The instance that is epoxy phenolics comprises epoxy cresol and epoxy phenol phenolic resins; It is through making phenolic resins (usually through orthoresol or phenol and formolite reaction formation) and chloropropylene oxide, 4-chloro-1; 2 epoxy butanes, 5-bromo-1,2 epoxy pentane or 6-chloro-1, reaction such as 3-epoxy hexane forms.
Epoxy resin (3), promptly the instance of cycloaliphatic epoxy resin comprises any aliphatic series with any aliphatic group, alicyclic or mixed aliphatic series-cycloaliphatic epoxides, and comprises the aliphatic epoxy resin with aryl, i.e. mixed aliphatic series-aromatic epoxy resin.Aliphatic epoxy resin can contain the cyclosiloxane monomer oxide that mixes with epoxide polymerization.
Epoxy resin (4); Promptly; Glycidyl amine type epoxy resin is that operable instance has 4 with primary amine or secondary amine and the synthetic compound with two or more glycidols amino of chloropropylene oxide; 4 '-MDA epoxy resin (AG-80 type), para-aminophenol epoxy resin (AFG-90 type), four glycidol m-xylene diamines, four glycidols-1, the two aminomethyl cyclohexanes of 3-etc.
Being used for acrylic acid ester of the present invention is that unimolecule has at least two reactive moieties to play the acrylic acid ester of crosslinked action, it typically is linear diacrylate.Typical example comprises tripropylene glycol diacrylate, hexanediyl ester, trimethylolpropane triacrylate.
In most of the cases, need in binding agent, introduce diluent (solvent).Usually, be benchmark with the total amount of epoxy resin, the total amount of all solvents is 0-25 weight %.Operable solvent comprises liquid high boiling ester, vegetable oil, lower alcohol and hydro carbons, for example aromatic hydrocarbons.In the present invention; High boiling ester is meant that boiling point is between 100～400 ℃; Especially between 150～400 ℃; The carboxylate between 200～400 ℃ particularly, example comprises dibutyl phthalate, dioctyl phthalate, diisobutyl phthalate, diisooctyl phthalate, adipic acid dibutyl ester, dimethyl succinate, dimethyl glutarate, dimethyl adipate; The example of lower alcohol comprises methyl alcohol, ethanol, butanols, isopropyl alcohol; The example of aromatic hydrocarbons comprises that benzene,toluene,xylene and ethylbenzene and boiling range are 150～290 ℃ petroleum liquid aromatic hydrocarbons fraction; The example of vegetable oil comprises rapeseed oil, soya-bean oil, linseed oil, sunflower oil, peanut oil, tung oil, palm-kernel oil, coconut oil, castor oil and olive oil, the wherein preferred minimum rapeseed oil of cost.
In a kind of preferred implementation of the present invention, use the mixed diluent of forming by high boiling ester and aromatic solvent, wherein introduce the effect that high boiling ester can play plasticising.Under the situation of using mixed diluent, the ratio of high boiling ester and aromatic solvent can be controlled in (2-4): in 1 the scope.
Preferably, described organic peroxide is a kind of or its combination in cumyl hydroperoxide, methyl ethyl ketone peroxide, the t-butyl hydroperoxide.
Can also introduce other composition at composition of the present invention, like silane etc. to improve performance of products.
In order to prepare binding agent of the present invention, benzylic ether phenolic resins and PIC are reacted at 70～90 ℃, obtain polyurethane, make polyurethane and epoxy resin carry out polymerisation then at 110～150 ℃, obtain polyurethane-modified epoxy resin.This modified epoxy is mixed with all the other compositions at normal temperatures, be distributed into component I, component II, the purpose of packing is that acrylic acid ester and peroxide are separated.
Through methods known in the art, the binding agent of dissimilar aggregates and different amounts is used to prepare cast mixture.Use this adhesive system and suitable aggregate can prepare common formed body, hot investment casting formed body and fire-resistant formed body.The amount of used binding agent and the type of aggregate are known to those skilled in the art.The aggregate that is preferred for preparing cast mixture is a sand, wherein at least about 70wt%, preferably the sand at least about 85wt% is silica.Other aggregate materials that are used for the conventional cast formed body that are fit to comprise zircon, olivine, aluminosilicate, chromite sand etc.
Those skilled in the art should understand can add other additives such as siloxanes, releasing agent, antifoaming agent, wetting agent etc. in aggregate or cast mixture.Designer's specific purposes are depended in the selection of special additive.
In ordinary sand casting is used, be benchmark with the weight of aggregate, the amount of binding agent is not more than about 10wt% usually, and usually in the scope of about 0.5-7.0wt%.More frequently, be benchmark with the weight of aggregate in the ordinary sand casting formed body, the binder amount that is used for normal sands casting body is the about 5.0wt% of about 0.6-.
Through hammering, winding-up or other known casting core and mould manufacturing method, cast mixture is molded as the formed body of hope.Use gaseous sulfur dioxide as curing agent (the most typically be to contain the nitrogen of 35-65wt% sulfur dioxide and the blend of sulfur dioxide, wherein nitrogen is as carrier), formed body is almost solidified simultaneously through cold-box process.Formed body preferably is exposed to the gaseous sulfur dioxide of effective catalytic amount, and chooses wantonly and can use vector gas.The open-assembly time of sand mixture in gas typically is 0.5-10 second.The casting body solidifies with sulfur dioxide inflation back again.If casting body and function fireproof coating applies, possibly need stove dry.
Following examples only are exemplary, can not be interpreted as the restriction to protection domain of the present invention.
Embodiment 1
The preparation of polyurethane modified epoxy resin
(1) will melt in good 180 kilograms of input agitated reactors of benzylic ether phenolic resins (weight average molecular weight 600), heated and stirred, dehydration (vacuum is the 15mm mercury column) under the vacuum, reach 120 ℃ of no bubbles to temperature till.Be cooled to 60 ℃, add 15 kilograms of PIC PM-200;
(2) the agitated reactor condenser is adjusted into reflux state, under agitation logical steam heats up, and in 30 minutes, makes temperature rise to 70 ℃, and 70～90 ℃ of insulation reaction 180 minutes;
(3) after insulation finishes, material is cooled to 60 ℃, adds 805 kilograms of epoxy resin DER331, in 60 minutes, make temperature in the kettle rise to 110 ℃, and, cool, promptly obtain polyurethane modified epoxy resin 110～150 ℃ of insulation reaction 180 minutes.
The preparation of component I: 600 kilograms, 260 kilograms trimethylolpropane triacrylates of above-mentioned polyurethane modified epoxy resin, 110 kilograms of dibutyl phthalates, 30 kilograms of aromatic hydrocarbons Solvesso 100 diluents add in the mixing kettle; Start stirring; Mixed about 2 hours, and made mixing of materials even.
The preparation of component II: 600 kilograms of cumyl hydroperoxides, above-mentioned polyurethane modified epoxy resin add in the mixing kettle for 400 kilograms, start stirring, mix about 2 hours, make mixing of materials even.
Embodiment 2
The preparation of polyurethane modified epoxy resin
(1) will melt in good 160 kilograms of input agitated reactors of benzylic ether phenolic resins (weight average molecular weight 800), heated and stirred, dehydration (vacuum is the 15mm mercury column) under the vacuum, reach 120 ℃ of no bubbles to temperature till.Be cooled to 60 ℃, add 20 kilograms of PIC PM-200;
(2) the agitated reactor condenser is adjusted into reflux state, under agitation logical steam heats up, and in 30 minutes, makes temperature rise to 70 ℃, and 70～90 ℃ of insulation reaction 180 minutes;
(3) after insulation finishes, material is cooled to 60 ℃, adds 820 kilograms of epoxy resin DER331, in 60 minutes, make temperature in the kettle rise to 110 ℃, and, cool, promptly obtain polyurethane modified epoxy resin 110～150 ℃ of insulation reaction 180 minutes.
The preparation of component I: 630 kilograms, 200 kilograms trimethylolpropane triacrylates of above-mentioned polyurethane modified epoxy resin, 140 kilograms of dibutyl phthalates, 30 kilograms of arene diluent Solvesso100 add in the mixing kettle; Start stirring; Mixed about 2 hours, and made mixing of materials even.
The preparation of component II: 650 kilograms of cumyl hydroperoxides, above-mentioned polyurethane modified epoxy resin add in the mixing kettle for 350 kilograms, start stirring, mix about 2 hours, make mixing of materials even.
Embodiment 3
The preparation of polyurethane modified epoxy resin
(1) will melt in good 134 kilograms of input agitated reactors of benzylic ether phenolic resins (weight average molecular weight 1200), heated and stirred, dehydration (vacuum is the 15mm mercury column) under the vacuum, reach 120 ℃ of no bubbles to temperature till.Be cooled to 60 ℃, add 16 kilograms of PIC PM-200;
(2) the agitated reactor condenser is adjusted into reflux state, under agitation logical steam heats up, and in 30 minutes, makes temperature rise to 70 ℃, and 70～90 ℃ of insulation reaction 180 minutes;
(3) after insulation finishes, material is cooled to 60 ℃, adds 850 kilograms of epoxy resin DER331, in 60 minutes, make temperature in the kettle rise to 110 ℃, and, cool, promptly obtain polyurethane modified epoxy resin 110～150 ℃ of insulation reaction 180 minutes.
The preparation of component I: 610 kilograms, 220 kilograms trimethylolpropane triacrylates of above-mentioned polyurethane modified epoxy resin, 140 kilograms of dibutyl phthalates, 30 kilograms of arene diluents add in the mixing kettle; Start stirring; Mixed about 2 hours, and made mixing of materials even.
The preparation of component II: 700 kilograms of cumyl hydroperoxides, above-mentioned polyurethane modified epoxy resin add in the mixing kettle for 300 kilograms, start stirring, mix about 2 hours, make mixing of materials even.
Embodiment 4
The preparation of polyurethane modified epoxy resin
(1) will melt in good 20 kilograms of input agitated reactors of benzylic ether phenolic resins (weight average molecular weight 1200), heated and stirred, dehydration (vacuum is the 15mm mercury column) under the vacuum, reach 120 ℃ of no bubbles to temperature till.Be cooled to 60 ℃, add 3 kilograms of PIC PM-200;
(2) the agitated reactor condenser is adjusted into reflux state, under agitation logical steam heats up, and in 30 minutes, makes temperature rise to 70 ℃, and 70～90 ℃ of insulation reaction 180 minutes;
(3) after insulation finishes, material is cooled to 60 ℃, adds 800 kilograms of epoxy resin DER331, in 60 minutes, make temperature in the kettle rise to 110 ℃, and, cool, promptly obtain polyurethane modified epoxy resin 110～150 ℃ of insulation reaction 180 minutes.
The preparation of component I: 823 kilograms, 400 kilograms trimethylolpropane triacrylates of above-mentioned polyurethane modified epoxy resin, 10 kilograms of dibutyl phthalates, 10 kilograms of arene diluents add in the mixing kettle; Start stirring; Mixed about 2 hours, and made mixing of materials even.
The preparation of component II: 300 kilograms of cumyl hydroperoxides, above-mentioned polyurethane modified epoxy resin add in the mixing kettle for 700 kilograms, start stirring, mix about 2 hours, make mixing of materials even.
Embodiment 5
The preparation of polyurethane modified epoxy resin
(1) will melt in good 200 kilograms of input agitated reactors of benzylic ether phenolic resins (weight average molecular weight 1800), heated and stirred, dehydration (vacuum is the 15mm mercury column) under the vacuum, reach 120 ℃ of no bubbles to temperature till.Be cooled to 60 ℃, add 50 kilograms of PIC PM-200;
(2) the agitated reactor condenser is adjusted into reflux state, under agitation logical steam heats up, and in 30 minutes, makes temperature rise to 70 ℃, and 70～90 ℃ of insulation reaction 180 minutes;
(3) after insulation finishes, material is cooled to 60 ℃, adds 400 kilograms of epoxy resin DER331, in 60 minutes, make temperature in the kettle rise to 110 ℃, and, cool, promptly obtain polyurethane modified epoxy resin 110～150 ℃ of insulation reaction 180 minutes.
The preparation of component I: 650 kilograms, 150 kilograms trimethylolpropane triacrylates of above-mentioned polyurethane modified epoxy resin, 150 kilograms of dibutyl phthalates, 50 kilograms of arene diluents add in the mixing kettle; Start stirring; Mixed about 2 hours, and made mixing of materials even.
The preparation of component II: 700 kilograms of cumyl hydroperoxides, above-mentioned polyurethane modified epoxy resin add in the mixing kettle for 300 kilograms, start stirring, mix about 2 hours, make mixing of materials even.
Comparative example 1-5
Repeat the operation of embodiment 1-5, difference is that comparative example 1-5 uses the benzylic ether phenolic resins of number-average molecular weight as 800-1200.
Table 1 is listed the viscosity of embodiment and comparative example gained binding agent
Table 1
The intensity detection of polyurethane modified epoxy resin dual-component binder is with reference to GB2684 " casting is with roughing sand and test mixture method ".At first add sand 3000 grams, add binding agent component I, component II among the embodiment 1～3 again, mixed 3 minutes, then this resin sand being pressed into diameter through the air blowing of MLA1 core making machine is that 30mm, height are the cylindrical sample of 50mm, and its core manufacturing craft parameter is seen table 2
Table 2
| Penetrate sand pressure | Blow SO2 pressure | Washing pressure | Blow the SO2 time | Wash time |
| 0.4MPa | ?0.2MPa | 0.2MPa | 15.0 second | 10.0 second |
The compression strength result that detection obtains sees table 3
Table 3
More than to a kind of sulfur dioxide provided by the present invention the sclerosis of blowing carried out detailed introduction with cold-box binder; Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on the specific embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a cold-box process epoxy resin dual-component binder is characterized in that, said binder system air blowing attitude sulfur dioxide solidifies, and said binder system comprises by its weight:
(a) benzylic ether phenolic resins is 1～40 part
(b) PIC is 0.1～10 part
(c) epoxy resin is 40～80 parts
(d) acrylic acid ester is 20～30 parts
(e) high boiling ester and/or hydrocarbon diluent are 1～30 part
(f) organic peroxide is 15～75 parts,
Wherein, The consumption of benzylic ether phenolic resins be about epoxy resin 1～50% between; The consumption of PIC be about benzylic ether phenolic resins 1～30% between; And component I comprises acrylic acid ester of all parts and benzylic ether phenolic resins, PIC, epoxy resin and high boiling ester and/or the hydrocarbon diluent of part part; Component II comprises organic peroxide of all parts and epoxy resin, benzylic ether phenolic resins, PIC and the high boiling ester and/or the hydrocarbon diluent of all the other parts, and the weight average molecular weight of said benzylic ether phenolic resins is between 500～2000.
2. dual-component binder according to claim 1 is characterized in that: said binder system air blowing attitude sulfur dioxide solidifies, and said binder system comprises by its weight:
(a) benzylic ether phenolic resins is 5～30 parts
(b) PIC is 1～8 part
(c) epoxy resin is 45～60 parts
(d) acrylic acid ester is 20～30 parts
(e) high boiling ester and/or hydrocarbon diluent are 5～20 parts
(f) organic peroxide is 30～65 parts,
Wherein, the consumption of benzylic ether phenolic resins be about epoxy resin 5～35% between, the consumption of PIC be about benzylic ether phenolic resins 5～20% between.
3. dual-component binder according to claim 1 is characterized in that: the weight average molecular weight of said benzylic ether phenolic resins is 600～1200.
4. dual-component binder according to claim 1; It is characterized in that: described PIC is a diphenyl methane-4; 4 '-vulcabond, thick diphenyl methane-4; 4 '-vulcabond or polymethylene polyphenyl polyisocyanates, 1, one of hexamethylene-diisocyanate, IPDI or its mixture.
5. dual-component binder according to claim 1 is characterized in that: described acrylic acid ester is a kind of or its combination of tripropylene glycol diacrylate, hexanediyl ester, trimethylolpropane triacrylate.
6. dual-component binder according to claim 1 is characterized in that: described high boiling ester and/or hydrocarbon diluent are the petroleum liquid aromatic hydrocarbons fraction of 150～290 ℃ of dibutyl phthalates, dioctyl phthalate, diisobutyl phthalate, diisooctyl phthalate, adipic acid dibutyl ester, dimethyl succinate, dimethyl glutarate, dimethyl adipate, methyl alcohol, ethanol, butanols, isopropyl alcohol, boiling range, a kind of or its combination in the kerosene.
7. dual-component binder according to claim 1 is characterized in that: described organic peroxide is a kind of or its combination in cumyl hydroperoxide, methyl ethyl ketone peroxide, the t-butyl hydroperoxide.
8. dual-component binder according to claim 1, it is made by following method:
Benzylic ether phenolic resins and PIC are reacted at 70～90 ℃, obtain polyurethane,
Make gained polyurethane and epoxy resin carry out polymerisation, obtain polyurethane-modified epoxy resin at 110～150 ℃,
This modified epoxy is mixed with all the other compositions, be distributed into component I, component II, prerequisite is that acrylic acid ester and peroxide are separated.
9. cast mixture comprises:
(a) casting aggregate;
(b) each described bicomponent epoxy resin binding agent of the claim 1-8 of effective dose.
10. utilize the casting body of the said cast mixture preparation of claim 9.
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| CN104162625A (en) * | 2014-08-14 | 2014-11-26 | 济南圣泉集团股份有限公司 | Adhesive for casting and preparation method thereof |
| CN106040966A (en) * | 2015-06-18 | 2016-10-26 | 济南圣泉集团股份有限公司 | Cold core box binder and casting molding body |
| CN106424536A (en) * | 2016-10-12 | 2017-02-22 | 山东科技大学 | Free aldehyde-free and free phenol-free novel triethylamine cold core box casting adhesive |
| CN110139722A (en) * | 2016-12-23 | 2019-08-16 | Ask化学品股份有限公司 | The components system of manufacture type core and mold |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104162625A (en) * | 2014-08-14 | 2014-11-26 | 济南圣泉集团股份有限公司 | Adhesive for casting and preparation method thereof |
| CN106040966A (en) * | 2015-06-18 | 2016-10-26 | 济南圣泉集团股份有限公司 | Cold core box binder and casting molding body |
| CN106040966B (en) * | 2015-06-18 | 2019-02-05 | 济南圣泉集团股份有限公司 | Cold-box binder and casting and forming body |
| CN106424536A (en) * | 2016-10-12 | 2017-02-22 | 山东科技大学 | Free aldehyde-free and free phenol-free novel triethylamine cold core box casting adhesive |
| CN106424536B (en) * | 2016-10-12 | 2018-07-27 | 山东科技大学 | Novel triethylamine cold box process casting binder without dissociate aldehyde, free phenol |
| CN110139722A (en) * | 2016-12-23 | 2019-08-16 | Ask化学品股份有限公司 | The components system of manufacture type core and mold |
| CN110139722B (en) * | 2016-12-23 | 2021-10-26 | Ask化学品股份有限公司 | Component system for producing cores and molds |
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|---|---|
| CN102717024B (en) | 2016-03-30 |
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