CN101642796A - Formula and preparation process of alcohol group nanometer composite and surface modified dry powder mold paint - Google Patents

Formula and preparation process of alcohol group nanometer composite and surface modified dry powder mold paint Download PDF

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CN101642796A
CN101642796A CN200910189788A CN200910189788A CN101642796A CN 101642796 A CN101642796 A CN 101642796A CN 200910189788 A CN200910189788 A CN 200910189788A CN 200910189788 A CN200910189788 A CN 200910189788A CN 101642796 A CN101642796 A CN 101642796A
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powder
alcohol
nano
dry powder
compound
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CN101642796B (en
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孙鲁洪
胡昊民
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Shenzhen Jingding Modern Science & Technology Co Ltd
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Shenzhen Jingding Modern Science & Technology Co Ltd
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Abstract

The invention relates to an auxiliary material for casting and moulding, in particular to a formula of alcohol group dry powder mold paint for sand mold casting. The dry powder mold paint comprises surface modifier, suspending agent, binder and refractory powder, wherein the surface modifier is 0.6-4.2wt% of refractory powder, the suspending agent is 4.0-8.0wt% of refractory powder and the binderis 4.0-6.2wt% of refractory powder. The alcohol group nanometer composite and surface modified dry powder mold paint of the invention adopts nanometer layered clay and nano-SiO2 to form composite suspending agent so that the controllability of operation technological parameters of the alcohol group dry powder mold paint is good and the process performance and operating performance of the obtainedpulp-type paint can both meet the demand of the casting factory.

Description

A kind of alcohol group nano compound and surface modified dry powder mold paint prescription and preparation technology thereof
Technical field:
The present invention relates to a kind of casting and molding auxiliary material, especially a kind of alcohol radical dry powder mold paint prescription and preparation technology thereof who is used for sand casting.
Background technology:
Mold wash is to solve scab, improves surface quality of continuous castings effective measures the most.Igniting is dry owing to having, characteristics such as intensity is good, efficient height are used widely in castings production factory for alcohol-base paint wherein.And the present commercial mold wash overwhelming majority is the form supply of material with pulpous state, the carrier fluid of alcohol-base paint mainly is made up of ethanol, methyl alcohol, isopropyl alcohol etc., belong to inflammable dangerous material, this just makes coating be subjected to all multiple constraints at aspects such as packing, transportation, storages inevitably, and especially the haul-cycle time is long, expense is high; Because the suspension stability of alcohol-base paint is relatively poor, coating is in long-distance transport and deposit easily layering in the process, and its processing performance is descended in addition, serious coating produced harden (silent as the grave shallow lake) phenomenon and scraps.Alcohol radical dry powder (powdery) coating does not contain flammable solvent, only needs during use to add in powder to get final product after alcohols solvent stirs; And can transport by general cargo with the dry powder paint that the double braid bag is packed, the haul-cycle time is short, and expense also reduces greatly.
Chinese patent CN86105456A discloses a kind of mould coating made of lithium bentonite and zirconite powder, raw materials such as lithium bentonite, zirconium English powder, resin and titanium dioxide are milled by mixing make powder-type coating, directly add ethanol during use and be diluted to slurry coating material, but because the suspending agent lithium bentonite is without causing swelling, the slurry coating material suspension that mixes system is poor, causes the non-constant of its on-the-spot workability.Chinese patent CN1022173C discloses a kind of process for preparation of dry powder of alcoholic paint, suspending agent lithium soil is carried out degenerative treatments, again with refractory powder, binding agent and other auxiliary agent mixed grinds become alcohol based dry powder paint, its preparation technology requires very high, it is improper that control has slightly, promptly can influence the performance of coating, and this technology is only applicable to prepare silica flour, the coating of low density fire resistant powder in the graphite powder etc., for zirconium English powder commonly used in the mold wash, chromite powder, the dry powder paint of higher density refractory powders such as schmigel can not guarantee that still it has suspension stability and other processing performances preferably.Chinese patent CN100377811C discloses a kind of production method of Alcohoh base casting coating material powder for concave convex rod, with the attapulgite clay of sodium modification as suspending agent, made coating material powder can reach higher suspensibility in ethanol, but the shared percentage of modified attapulgite clay is 55%~85% in this coating material powder, refractory powder (alumine+graphite) only is 10%~45%, the consumption of suspending agent is much higher than refractory powder, though make the slurry coating material that obtains that good suspension stability be arranged, but with the refractoriness that reduces coating as cost, therefore, limit the scope of application of coating, can not be used for the production of steel-casting and large-sized iron casting.Chinese patent CN101319104A discloses the coating of composite suspension agent of a kind of alcohol based dry powder paint and preparation method thereof and preparation, in organic clay, add active component, be mixed into dry powder paint with film forming complexing agent and the fire-resistant base material formed by adhesion component again, be applicable to the refractory powder of various density such as zirconium English powder, graphite powder, can reach comparatively ideal suspension effect.But because refractory powder is an inorganic material, suspending agent organic clay and film forming complexing agent are organic material, easily form segregation (especially through after long-distance transport and the long-term storage) by the dry powder paint that is mixed and made into, thereby it is inhomogeneous to cause dry powder paint to be formed, make the slurry coating material performance inconsistency of the system of mixing, be difficult to control during use.
Summary of the invention:
The present invention provides a kind of alcohol radical dry powder mold paint technology that can be used for cast steel, cast iron and nonferrous alloy sand casting in order to solve above-mentioned prior art problem just, it forms even segregation-free, add the slurry coating material that obtains behind the alcohol and have good suspension stability, and other technologies of coating and service behaviour all can satisfy instructions for use.
The present invention seeks to realize by following technological means:
Formulation for coating material:
Compound and the surface modified dry powder mold paint of a kind of alcohol group nano includes: surface modifier, suspending agent, binding agent and refractory powder; Wherein the mass fraction of surface modifier is 0.6%~4.2% of a refractory powder, and the mass fraction of suspending agent is 4.0%~8.0% of a refractory powder, and the mass fraction of binding agent is 4.0%~6.2% of a refractory powder.
Above-mentioned prescription can also be 1.0%~3.0% of refractory powder for the mass fraction of surface modifier, and the mass fraction of suspending agent is 6.0%~8.0% of a refractory powder, and the mass fraction of binding agent is 4.0%~5.0% of a refractory powder.
Wherein, in each component composition: refractory powder is at least a in zirconium English powder, chromite powder, schmigel, fused alumina zirconia powder, magnesia powder, forsterite powder, aquamaine stone flour, sillimanite powder, mullite powder, bauxite powder, silica flour, talcum powder, graphite powder, pyrophyllite in powder, kaolin, mica powder, diatomite in powder, the calcium carbonate.The refractory powder granularity is 100~320 orders.
Described surface modifier is made up of coupling agent and higher fatty acids and salt, and the mass fraction of coupling agent is 0.1%~1.2% of a refractory powder, and the mass fraction of higher fatty acids and salt is 0.5%~3.0% of a refractory powder; Wherein coupling agent can be silane coupler or titanate coupling agent, silane coupler is γ-glycidyl ether oxygen propyl trimethoxy silicane or gamma-aminopropyl-triethoxy-silane, and titanate coupling agent is isopropyl three (dodecyl benzenesulfonyl) titanate esters or isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters; Higher fatty acids and salt are a kind of in stearic acid, calcium stearate, the zinc stearate.
Described suspending agent is nano lamellar clay and nanometer SiO 2Mixture, nano lamellar clay: nanometer SiO 2(mass ratio)=2~3: 1; Wherein the nano lamellar clay becomes organo montmorillonite by organo montmorillonite with organic attapulgite local soil type: organic attapulgite soil (mass ratio)=1: 0.5~2.1, its average wafer thickness 25~100nm; Nanometer SiO 2Particle diameter is 20~60nm.
Described compound binding agent can be one or more mixtures in phenolic resinoid polymer, rosin and derivative thereof, the vinylite, and the binding agent granularity is 120~300 orders; The mass fraction of phenolic resinoid polymer and rosin and derivative thereof is 4.0%~6.0% of a refractory powder, and the mass fraction of vinylite is 0~0.2% of a refractory powder; Wherein the phenolic resinoid polymer is pure dissolubility phenolic resins or rosin modified phenolic resin; Rosin and derivative thereof are a kind of in gum rosin, newtrex or the maleic rosin; Vinylite is a polyvinyl butyral resin.
Preparation technology:
Alcohol group nano of the present invention preparation technology compound and surface modified dry powder mold paint is: a, coupling agent added mix 0.5~1h in the refractory powder in kneader, add higher fatty acids and salt and mix and disperse 4~6h, and place 24h; B, the refractory powder after the modification is placed in the barrel mixer, add nano combined suspending agent and mix 2~4h; C, add compound binding agent at last and mix 2~4h, obtain the dry powder mold paint finished product.
Using method:
Compound and the surface modified dry powder mold paint of alcohol group nano of the present invention can be according to different manner of application such as brushing, dip-coating, flow coat, sprayings, press powder with ethanol, methyl alcohol or isopropyl alcohol: alcohol (mass ratio)=100: 40~70 agitation and dilution pulp coating, its suspension 2h 〉=98%, 8h 〉=92%, 24h 〉=85%.Light drying after coating applies immediately, the dry powder mold paint that different refractory powders make can be applicable to the sand casting process of cast steel, cast iron or nonferrous alloy respectively.
Compound and the surface modified dry powder mold paint of alcohol group nano of the present invention has adopted nano lamellar clay and nanometer SiO 2Form composite suspension agent.The nano lamellar clay is that natural clay is through the dispersion of delaminating, purify remodeling, super-fine classified, special organic being composited, nanometer SiO 2Be the silicon tetrachloride SiO that hydrolysis forms in oxygen-hydrogen flame 2The ultrafine particle of content more than 99.8%.The nanoparticle size is little, and the surface can be high, and the atom that is positioned at the surface accounts for sizable ratio.Because the surface atom number increases the Atomic coordinate deficiency; In addition,, make these surface atoms have high activity because the surface can be higher, extremely unstable, be easy to combine with other atoms.Therefore, after two kinds of nano material combinations, show good polymolecularity, thixotropy and adsorptivity, also have high-temperature viscosity stability simultaneously.This composite suspension system need not be leaned on initator to cause and be directly used in the dry powder mold paint, just can make to add the slurry coating material that obtains behind the alcohol and have good suspension stability.Simultaneously in the alcohol radical dry powder mold paint, adsorb, react, coat and realize organic modification of surface on inorganic refractory powder surface by modifier (coupling agent and higher fatty acids and salt).Coupling agent is the material with both sexes structure, a part of group of its molecule can form chemical bonding with the various functional group reactionses on refractory powder surface, some chemical reaction or physics can take place with organic matter and twine in another part group, thereby " the molecule bridge " that make the intermolecular generation of inorganic refractory powder and organic system (binding agent and suspending agent) that its strong bonded is got up; The chain alkyl and the organic matter of same higher fatty acids and molecules of salt one end have certain compatibility, physics, chemisorption can take place with the refractory powder surface in the carboxyl of the molecule other end, therefore the compatibility of refractory powder and organic system be can improve, suspending agent and the decentralization of binding agent in refractory powder improved; And higher fatty acids and salt itself have lubrication, can also reduce to mix the frictional force in the compound system of back, improves the mobile performance of dry powder mold paint.Use two kinds of surface modifiers by mixing, both suppressed the refractory powder particle and be separated, its particle surface is organised, have the interface affine with organic system.Even adopt simple mechanical mixture, organic suspending agent and binding agent are uniformly dispersed in refractory powder preferably, make the dry powder paint mixed system that makes be difficult for taking place segregation phenomena, thereby make the use technological parameter controllability of alcohol radical dry powder mold paint good, the processing performance of gained slurry coating material and service behaviour all can satisfy the requirement of castings production factory.
The specific embodiment:
Further explain the present invention below by some concrete prescriptions and preparation technology.
Embodiment 1
Coating formula: zirconium English powder 100kg, γ-glycidyl ether oxygen propyl trimethoxy silicane 0.5kg, stearic acid 0.5kg, organo montmorillonite 1.3kg, organic attapulgite soil 1.4kg, nanometer SiO 21.3kg, phenolic resins 4.0kg, polyvinyl butyral resin 0.2kg.
Preparation technology: γ-glycidyl ether oxygen propyl trimethoxy silicane is added in the zirconium English powder, in kneader, mix 0.5h, add stearic acid and mix dispersion 4h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add phenolic resins and polyvinyl butyral resin mixing 4h at last, obtain the dry powder mold paint finished product.
Embodiment 2
Coating formula: zirconium English powder 70kg, mullite powder 30kg, gamma-aminopropyl-triethoxy-silane 0.6kg, calcium stearate 1.0kg, organo montmorillonite 1.7kg, organic attapulgite soil 1.7kg, nanometer SiO 21.6kg, rosin modified phenolic resin 5.0kg, polyvinyl butyral resin 0.1kg.
Preparation technology: gamma-aminopropyl-triethoxy-silane is added in zirconium English powder and the mullite powder, in kneader, mix 0.5h, add calcium stearate and mix dispersion 5h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add rosin modified phenolic resin and polyvinyl butyral resin mixing 3h at last, obtain the dry powder mold paint finished product.
Embodiment 3
Coating formula: aquamaine stone flour 60kg, bauxite powder 40kg, γ-glycidyl ether oxygen propyl trimethoxy silicane 0.7kg, zinc stearate 1.5kg, organo montmorillonite 2.0kg, organic attapulgite soil 2.0kg, nanometer SiO 22.0kg, phenolic resins 6.0kg.
Preparation technology: γ-glycidyl ether oxygen propyl trimethoxy silicane is added in aquamaine stone flour and the bauxite powder, in kneader, mix 0.5h, add zinc stearate and mix dispersion 6h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add phenolic resins mixing 2h at last, obtain the dry powder mold paint finished product.
Embodiment 4
Coating formula: chromite powder 100kg, isopropyl three (dodecyl benzenesulfonyl) titanate esters 0.1kg, calcium stearate 2.0kg, organo montmorillonite 2.3kg, organic attapulgite soil 2.4kg, nanometer SiO 22.3kg, gum rosin 6.0kg, polyvinyl butyral resin 0.2kg.
Preparation technology: isopropyl three (dodecyl benzenesulfonyl) titanate esters is added in the chromite powder, in kneader, mix 0.5h, add calcium stearate and mix dispersion 4h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add gum rosin and polyvinyl butyral resin mixing 4h at last, obtain the dry powder mold paint finished product.
Embodiment 5
Coating formula: schmigel 60kg, sillimanite powder 40kg, gamma-aminopropyl-triethoxy-silane 0.8kg, stearic acid 2.5kg, organo montmorillonite 2.7kg, organic attapulgite soil 2.7kg, nanometer SiO 22.6kg, newtrex 5.0kg, polyvinyl butyral resin 0.1kg.
Preparation technology: gamma-aminopropyl-triethoxy-silane is added in schmigel and the sillimanite powder, in kneader, mix 0.5h, add stearic acid and mix dispersion 5h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add newtrex and polyvinyl butyral resin mixing 3h at last, obtain the dry powder mold paint finished product.
Embodiment 6
Coating formula: fused alumina zirconia powder 100kg, γ-glycidyl ether oxygen propyl trimethoxy silicane 1.2kg, calcium stearate 3.0kg, organo montmorillonite 2.0kg, organic attapulgite soil 1.0kg, nanometer SiO 21.0kg, maleic rosin 4.0kg.
Preparation technology: γ-glycidyl ether oxygen propyl trimethoxy silicane is added in the fused alumina zirconia powder, in kneader, mix 0.5h, add calcium stearate and mix dispersion 6h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add maleic rosin mixing 2h at last, obtain the dry powder mold paint finished product.
Embodiment 7
Coating formula: magnesia powder 100kg, isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters 0.1kg, zinc stearate 0.5kg, organo montmorillonite 2.5kg, organic attapulgite soil 1.2kg, nanometer SiO 21.3kg, rosin modified phenolic resin 2.8kg, newtrex 1.2kg, polyvinyl butyral resin 0.2kg.
Preparation technology: isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters is added in the magnesia powder, in kneader, mix 0.5h, add zinc stearate and mix dispersion 4h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add rosin modified phenolic resin, newtrex and polyvinyl butyral resin mixing 4h at last, obtain the dry powder mold paint finished product.
Embodiment 8
Coating formula: forsterite powder 80kg, bauxite powder 20kg, isopropyl three (dodecyl benzenesulfonyl) titanate esters 0.3kg, calcium stearate 1.0kg, organo montmorillonite 3.0kg, organic attapulgite soil 1.5kg, nanometer SiO 21.5kg, phenolic resins 2.8kg, gum rosin 1.2kg, polyvinyl butyral resin 0.1kg.
Preparation technology: isopropyl three (dodecyl benzenesulfonyl) titanate esters is added in forsterite powder and the bauxite powder, in kneader, mix 0.5h, add calcium stearate and mix dispersion 5h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 4h, add phenolic resins, gum rosin and polyvinyl butyral resin mixing 3h at last, obtain the dry powder mold paint finished product.
Embodiment 9
Coating formula: silica flour 30kg, bauxite powder 70kg, gamma-aminopropyl-triethoxy-silane 1.0kg, stearic acid 2.0kg, organo montmorillonite 3.5kg, organic attapulgite soil 1.7kg, nanometer SiO 21.8kg, rosin modified phenolic resin 2.8kg, maleic rosin 1.2kg.
Preparation technology: gamma-aminopropyl-triethoxy-silane is added in silica flour and the bauxite powder, in kneader, mix 1h, add stearic acid and mix dispersion 6h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add rosin modified phenolic resin and maleic rosin mixing 2h at last, obtain the dry powder mold paint finished product.
Embodiment 10
Coating formula: talcum powder 90kg, kaolin 10kg, isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters 0.2kg, calcium stearate 2.5kg, organo montmorillonite 4.0kg, organic attapulgite soil 2.0kg, nanometer SiO 22.0kg, phenolic resins 2.5kg, maleic rosin 2.5kg, polyvinyl butyral resin 0.2kg.
Preparation technology: isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters is added in talcum powder and the kaolin, in kneader, mix 1h, add calcium stearate and mix dispersion 4h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add phenolic resins, maleic rosin and polyvinyl butyral resin mixing 4h at last, obtain the dry powder mold paint finished product.
Embodiment 11
Coating formula: graphite powder 75kg, silica flour 25kg, isopropyl three (dodecyl benzenesulfonyl) titanate esters 0.2kg, zinc stearate 3.0kg, organo montmorillonite 1.0kg, organic attapulgite soil 2.0kg, nanometer SiO 21.0kg, rosin modified phenolic resin 2.5kg, newtrex 2.5kg, polyvinyl butyral resin 0.1kg.
Preparation technology: isopropyl three (dodecyl benzenesulfonyl) titanate esters is added in graphite powder and the silica flour, in kneader, mix 1h, add zinc stearate and mix dispersion 5h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add rosin modified phenolic resin, newtrex and polyvinyl butyral resin mixing 3h at last, obtain the dry powder mold paint finished product.
Embodiment 12
Coating formula: silica flour 10kg, pyrophyllite in powder 80kg, mica powder 10kg, γ-glycidyl ether oxygen propyl trimethoxy silicane 1.1kg, calcium stearate 0.5kg, organo montmorillonite 1.2kg, organic attapulgite soil 2.5kg, nanometer SiO 21.3kg, phenolic resins 2.5kg, gum rosin 2.5kg.
Preparation technology: γ-glycidyl ether oxygen propyl trimethoxy silicane is added in silica flour, pyrophyllite in powder and the mica powder, in kneader, mix 1h, add calcium stearate and mix dispersion 6h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add phenolic resins and gum rosin mixing 2h at last, obtain the dry powder mold paint finished product.
Embodiment 13
Coating formula: talcum powder 30kg, graphite powder 10kg, diatomite in powder 60kg, gamma-aminopropyl-triethoxy-silane 1.2kg, stearic acid 1.0kg, organo montmorillonite 1.5kg, organic attapulgite soil 3.0kg, nanometer SiO 21.5kg, rosin modified phenolic resin 1.8kg, gum rosin 4.2kg, polyvinyl butyral resin 0.2kg.
Preparation technology: gamma-aminopropyl-triethoxy-silane is added in talcum powder, graphite powder and the diatomite in powder, in kneader, mix 1h, add stearic acid and mix dispersion 4h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add rosin modified phenolic resin, gum rosin and polyvinyl butyral resin mixing 4h at last, obtain the dry powder mold paint finished product.
Embodiment 14
Coating formula: graphite powder 100kg, γ-glycidyl ether oxygen propyl trimethoxy silicane 0.9kg, calcium stearate 1.5kg, organo montmorillonite 1.7kg, organic attapulgite soil 3.5kg, nanometer SiO 21.8kg, phenolic resins 1.8kg, maleic rosin 4.2kg, polyvinyl butyral resin 0.1kg.
Preparation technology: γ-glycidyl ether oxygen propyl trimethoxy silicane is added in the graphite powder, in kneader, mix 1h, add calcium stearate and mix dispersion 5h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add phenolic resins, maleic rosin and polyvinyl butyral resin mixing 3h at last, obtain the dry powder mold paint finished product.
Embodiment 15
Coating formula: forsterite powder 30kg, calcium carbonate 70kg, isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters 0.3kg, zinc stearate 2.0kg, organo montmorillonite 2.0kg, organic attapulgite soil 4.0kg, nanometer SiO 22.0kg, rosin modified phenolic resin 1.8kg, newtrex 4.2kg.
Preparation technology: isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters is added in forsterite powder and the calcium carbonate, in kneader, mix 1h, add zinc stearate and mix dispersion 6h, and place 24h; Refractory powder after the modification is placed in the barrel mixer, add organo montmorillonite, organic attapulgite soil and nanometer SiO 2Mix 2h, add rosin modified phenolic resin and newtrex mixing 2h at last, obtain the dry powder mold paint finished product.
The foregoing description can carry out multiple combination, so long as in above-mentioned scope of the present invention, can prepare the compound and surface modified dry powder mold paint of alcohol group nano.
Compound and the surface modified dry powder mold paint of alcohol group nano can be according to different manner of application such as brushing, dip-coating, flow coat, sprayings, press powder with ethanol, methyl alcohol or isopropyl alcohol: alcohol (mass ratio)=100: 40~70 agitation and dilution pulp coating, its suspension 2h 〉=98%, 8h 〉=92%, 24h 〉=85%.Light drying after coating applies immediately, the dry powder mold paint that different refractory powders make can be applicable to the sand casting process of cast steel, cast iron or nonferrous alloy respectively.
More than be that compound and surface modified dry powder mold paint prescription and preparation technology thereof are described in detail to a kind of alcohol group nano provided by the present invention, used specific case herein prescription of the present invention and preparation technology thereof are set forth, 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, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.

Claims (10)

1, the compound and surface modified dry powder mold paint of a kind of alcohol group nano is characterized in that the compound and surface modified dry powder mold paint of described alcohol group nano includes: surface modifier, suspending agent, binding agent and refractory powder; The mass fraction of surface modifier is 0.6%~4.2% of a refractory powder, and the mass fraction of suspending agent is 4.0%~8.0% of a refractory powder, and the mass fraction of binding agent is 4.0%~6.2% of a refractory powder.
2, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1, it is characterized in that the compound and surface modified dry powder mold paint prescription of described alcohol group nano can also for: the mass fraction of surface modifier is 1.0%~3.0% of a refractory powder, the mass fraction of suspending agent is 6.0%~8.0% of a refractory powder, and the mass fraction of binding agent is 4.0%~5.0% of a refractory powder.
3, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1 is characterized in that described refractory powder is at least a in zirconium English powder, chromite powder, schmigel, fused alumina zirconia powder, magnesia powder, forsterite powder, aquamaine stone flour, sillimanite powder, mullite powder, bauxite powder, silica flour, talcum powder, graphite powder, pyrophyllite in powder, kaolin, mica powder, diatomite in powder, the calcium carbonate.
4, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1 is characterized in that described refractory powder granularity is 100~320 orders.
5, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1, it is characterized in that described surface modifier is made up of coupling agent and higher fatty acids and salt, the mass fraction of coupling agent is 0.1%~1.2% of a refractory powder, and the mass fraction of higher fatty acids and salt is 0.5%~3.0% of a refractory powder; Wherein coupling agent can be silane coupler or titanate coupling agent, silane coupler is γ-glycidyl ether oxygen propyl trimethoxy silicane or gamma-aminopropyl-triethoxy-silane, and titanate coupling agent is isopropyl three (dodecyl benzenesulfonyl) titanate esters or isopropyl three (dioctyl phosphoric acid acyloxy) titanate esters; Higher fatty acids and salt are a kind of in stearic acid, calcium stearate, the zinc stearate.
6, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1 is characterized in that described suspending agent is nano lamellar clay and nanometer SiO 2Mixture, quality is than nano lamellar clay: nanometer SiO 2=2~3: 1; Wherein the nano lamellar clay is become with organic attapulgite local soil type by organo montmorillonite, and quality is than organo montmorillonite: organic attapulgite soil=1: 0.5~2.1, its average wafer thickness 25~100nm; Nanometer SiO 2Particle diameter is 20~60nm.
7, the compound and surface modified dry powder mold paint of alcohol group nano according to claim 1, it is characterized in that described compound binding agent can be one or more mixtures in phenolic resinoid polymer, rosin and derivative thereof, the vinylite, the binding agent granularity is 120~300 orders; The mass fraction of phenolic resinoid polymer and rosin and derivative thereof is 4.0%~6.0% of a refractory powder, and the mass fraction of vinylite is 0~0.2% of a refractory powder; Wherein the phenolic resinoid polymer is pure dissolubility phenolic resins or rosin modified phenolic resin; Rosin and derivative thereof are a kind of in gum rosin, newtrex or the maleic rosin; Vinylite is a polyvinyl butyral resin.
8, the preparation technology of the compound and surface modified dry powder mold paint of a kind of alcohol group nano according to claim 1, it is characterized in that described technology may further comprise the steps: a, coupling agent added in kneader, mix 0.5~1h in the refractory powder, add higher fatty acids and salt and mix dispersion 4~6h, and place 24h; B, the refractory powder after the modification is placed in the barrel mixer, add nano combined suspending agent and mix 2~4h; C, add compound binding agent at last and mix 2~4h, obtain the dry powder mold paint finished product.
9, the using method of the compound and surface modified dry powder mold paint of a kind of alcohol group nano according to claim 1, it is characterized in that the compound and surface modified dry powder mold paint of described alcohol group nano can cooperate ethanol, methyl alcohol or isopropyl alcohol at least a, by quality than dry powder paint: alcohol=100: 40~70 agitation and dilution pulp coating; Slurry coating material is applied in a kind of mode in brushing, dip-coating, flow coat, the spraying lights dry getting final product behind the sand mold immediately.
10, the using method of and surface modified dry powder mold paint compound according to the described alcohol group nano of claim 9 is characterized in that 2h suspension 〉=98%, 8h suspension 〉=92%, 24h suspension 〉=85% of made slurry coating material.
CN2009101897884A 2009-08-28 2009-08-28 Formula and preparation process of alcohol group nanometer composite and surface modified dry powder mold paint Expired - Fee Related CN101642796B (en)

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