CN103333539B - Inorganic aqueous high-temperature heat-resistance coating of silicate and preparation method thereof - Google Patents
Inorganic aqueous high-temperature heat-resistance coating of silicate and preparation method thereof Download PDFInfo
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- CN103333539B CN103333539B CN201310201370.7A CN201310201370A CN103333539B CN 103333539 B CN103333539 B CN 103333539B CN 201310201370 A CN201310201370 A CN 201310201370A CN 103333539 B CN103333539 B CN 103333539B
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Abstract
The invention discloses and the invention provides the inorganic aqueous high-temperature heat-resistance coating of a kind of silicate, mixed by plurality of raw materials; Described raw material comprises: liquid silicon hydrochlorate 40 ~ 50 mass parts, deionized water 10 ~ 15 mass parts, organoalkoxysilane 2 ~ 5 mass parts, silicon sol 2 ~ 6 mass parts, aerogel 0.1 ~ 1 mass parts, aluminum phosphate 3 ~ 10 mass parts, Vanadium Pentoxide in FLAKES/alumina mixture 5 ~ 15 mass parts, high temperature resistant weighting agent 3 ~ 7 mass parts, high temperature resistant inorganic pigment 10 ~ 15 mass parts, wetting agent 1 ~ 3 mass parts.The present invention is also provided for the preparation method preparing the inorganic aqueous high-temperature heat-resistance coating of above-mentioned silicate.Invention increases the heat resisting temperature of heat resisting coating, solve the defect of coating water-resistance property of coating difference, and accomplish low cost, nontoxic, environmental protection.
Description
Technical field
The present invention relates to the body surface for there being higher thermal radiant heat source, the inorganic heat-resisting high-temperature coatings of effective safety precaution is provided, be specifically related to inorganic aqueous high-temperature heat-resistance coating of silicate and preparation method thereof.
Background technology
High-temperature coatings is painted on body surface, effectively can protect coated article body.Above-mentioned heat-resisting high-temperature coatings just has research in early days, and continues so far always.All the time, the method improving the resistance toheat of silica gel heat resisting coating has: (1) improves the resistance toheat of silica column; (2) low melting glass material is adopted; (3) mineral dye is used.But due to silicon system resin on the high side that silicon rubber heat-resisting coating uses, and thermal stability is confined to, between 300 ~ 500 DEG C of scopes, therefore cannot meet the reality need having higher heat resistant requirements.
Clay and various natural mineral matter mixing through pulverizing, be equipped with the coating that colloid and colloidal sol makes and be generically and collectively referred to as ceramic coating, it can meet heat resistant requirements to a certain extent.But, because this coating is produced mainly with two component two liquid type greatly, before using, need mixing to adjust, and require to grasp effective duration of service.In concrete use, be difficult to correct grasp effective duration of service as general human consumer, manage and badly will produce bad consequences for use because of the change of physical property of liquid.This coating is the same with silicon system heat resisting coating, all higher in price structure, therefore limits to a certain extent and promotes the popularization use.
The liquid silicon hydrochlorates such as water glass, potassium silicate, lithium silicate as water soluble liq, the generation of non-volatility organic compound material, cheap compared with existing silicon system resin and petroleum chemistry system organic polymer coating, and there is outstanding heat-resisting and uninflammability energy.Apply the tackiness agent of this material making and special paint, lower as environmentfriendly products cost, there is the value of penetration and promotion.The drying sclerosis of coating is generally carried out at normal temperatures, liquid silicon hydrochlorate is applied in the making of common coating, can because moisture is swelling and soak into, coating film there will be the deadly defect of poor water resistance, and this is also the important factor that this solution can not be widely applied in coating making.So far, the application of silicate solutions in coating, is confined on the upgrading to partial coating characteristic mostly.
Summary of the invention
The object of the present invention is to provide inorganic aqueous high-temperature heat-resistance coating of silicate and preparation method thereof, improve the heat resisting temperature of heat resisting coating, solve the defect of coating water-resistance property of coating difference, and accomplish low cost, nontoxic, environmental protection.
For achieving the above object, the invention provides the inorganic aqueous high-temperature heat-resistance coating of a kind of silicate, mixed by plurality of raw materials; Described raw material comprises: liquid silicon hydrochlorate 40 ~ 50 mass parts, deionized water 10 ~ 15 mass parts, organoalkoxysilane 2 ~ 5 mass parts, silicon sol 2 ~ 6 mass parts, aerogel 0.1 ~ 1 mass parts, aluminum phosphate 3 ~ 10 mass parts, Vanadium Pentoxide in FLAKES/alumina mixture 5 ~ 15 mass parts, high temperature resistant weighting agent 3 ~ 7 mass parts, high temperature resistant inorganic pigment 10 ~ 15 mass parts, wetting agent 1 ~ 3 mass parts.
Preferably, described liquid silicon hydrochlorate is made up of one or more in liquid sodium silicate, liquid silicic acid potassium, liquid silicic acid lithium.
Preferably, in described liquid sodium silicate, the mol ratio of silicon-dioxide and sodium oxide is 2.8 ~ 3.4: 1.
Preferably, in described liquid silicic acid potassium, the mol ratio of silicon-dioxide and potassium oxide is 3.2 ~ 3.6: 1.
Preferably, described organoalkoxysilane is the one in methyltrimethoxy silane, Union carbide A-162, vinyltriethoxysilane, dimethoxydiphenylsilane, triethoxyl silane, 3-glycidoxypropyltrimethoxysilane alkane.
Preferably, the particle size range of described silicon sol is at 10nm ~ 40nm.
Preferably, the proportioning of described Vanadium Pentoxide in FLAKES/alumina mixture is: mass percent is the Vanadium Pentoxide in FLAKES of 25 ~ 35%, and mass percent is the aluminum oxide of 65 ~ 75%.
Preferably, described high temperature resistant weighting agent is zirconium white.
Preferably, described high temperature resistant inorganic pigment is titanium dioxide.
The present invention is also provided for the preparation method preparing the inorganic aqueous high-temperature heat-resistance coating of above-mentioned silicate, comprises the steps: 40 ~ 50 mass parts liquid silicon hydrochlorates and deionized water to feed intake, and is stirred to uniform liquid shape; Add 2 ~ 5 mass parts organoalkoxysilanes again stirring at low speed 30 points, hydration reaction is fully carried out; Slowly added in 30 minutes by 2 ~ 6 mass parts silicon sol, interpolation limit, limit is stirred again; Add 0.1 ~ 1 mass parts aerogel afterwards and carry out thickening; Add 5 ~ 15 mass parts Vanadium Pentoxide in FLAKES/alumina mixtures; Add high temperature resistant weighting agent 3 ~ 7 mass parts and high temperature resistant inorganic pigment 10 ~ 15 mass parts that heat resisting temperature is more than 1500 DEG C successively, stirrer rotating speed is adjusted to high-speed stirring more than 30 points; With hondrometer determination mixture particle diameter be below 20 μm after, in said mixture, add deionized water carry out viscosity adjustment, finally obtained finished product; The otal investment of described deionized water is 10 ~ 15 mass parts.
Advantage of the present invention and beneficial effect are: provide inorganic aqueous high-temperature heat-resistance coating of silicate and preparation method thereof, improve the heat resisting temperature of heat resisting coating, solve the defect of coating water-resistance property of coating difference, and accomplish low cost, nontoxic, environmental protection.
Silane, through hydration reaction, can improve the surface strength of tackiness agent inorganic coating film, play an important role to coating waterproofing.It also can make the interpolation pigment of coating, is more easily mixed in coating paste.The use addition of organoalkoxysilane is 2 ~ 5 mass parts, and when addition is not enough to 2 mass parts, the reaction between burning colloid can weaken, and when usage quantity is higher than 5 mass parts, after sclerosis, the surface strength of film can weaken.
The reasonable addition of silicon sol is 2 ~ 6 mass parts, when addition is less than 2 mass parts, will reduce thermotolerance and the water tolerance of film, if addition is higher than 6 mass parts, will cause the sedimentation of high specific gravity raw material in liquid mixture.
Aerogel can be used as thickening material and uses, the heat-resisting stopping composition preventing proportion higher produces sedimentation phenomenon in the solution, usage quantity scope is 0.1 ~ 1 mass parts, when usage quantity is lower than specialized range value, thickening and anti-settling will be difficult to get a desired effect, if when usage quantity is higher than specialized range value, there will be the phenomenon hindering stirring because of excessive thickening; Optimized usage quantity is 0.3 ~ 0.8 mass parts.
The interpolation of aluminum phosphate 3 ~ 10 mass parts and Vanadium Pentoxide in FLAKES/alumina mixture 5 ~ 15 mass parts, not only improves the heat-resisting of film and resistivity against fire as stiffening agent, and coating also can be made to have protection against corrosion and antirust performance.During usage quantity 5 mass parts less than 3 mass parts, Vanadium Pentoxide in FLAKES of the usage quantity of aluminum phosphate, the setting rate of solution will be reduced, if higher than above-mentioned value range, film can be made in process of setting to produce caking, and the dispersion effect of paint additive in coating solution can be affected.
Liquid humectants, is made up of liquid antifoam agent and dispersion agent, and addition is 1 ~ 3 mass parts, if the addition of liquid humectants is less than 1 mass parts, bubble and shrinkage cavity can be produced in the dispersed with stirring of paint slurry, if addition is higher than 3 mass parts, the degree of compactness of weave construction will be reduced.
High temperature resistant weighting agent, can add in silicate solutions together with high temperature resistant inorganic pigment simultaneously.Mineral dye can use the oxide compound of Si, Al, Zr, Cr, Ti, Mg, Mo, Fe, carbide and nitride.Above-mentioned ferrous oxide, ferric oxide, lazurite pigment, chromic oxide, ochre, umber, the pigment such as acetylene carbon black, can give the multiple natural colour of coating and the thermotolerance improving film.
Deionized water can be used as buffer reagent, regulates dope viscosity.
The invention solves existing heat resisting coating to be beyond one's reach the problem of more than 1000 DEG C heat resisting temperatures.Using liquid Silicate Inorganic Binding Material of the present invention, solves the defect of coating water-resistance property of coating difference.The present invention does not have objectionable impurities (VOC) to discharge, low cost, nontoxic, environmental protection.
In the composition of the inorganic heat-resisting high-temperature coatings of environment friendly silicon phosphate-gallate series non-toxic water of the present invention's making, raw material based on waterborne liquid silicate emulsion, this raw material does not produce harmful organic compound volatile matter, the angle of ecological health can provide the good operating environment benefiting environmental protection, and the film after sclerosis can keep performance and the function of film lastingly in the high temperature of 1000 DEG C.In addition, this coating is different from the ceramic coating of two component, is an one-liquid single-component, has the advantage being convenient to round brush, spraying application.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Liquid silicon hydrochlorate and deionized water are fed intake, is stirred to uniform liquid shape; Add organoalkoxysilane again stirring at low speed 30 points, hydration reaction is fully carried out; Slowly added in 30 minutes by silicon sol, interpolation limit, limit is stirred again; Add aerogel afterwards and carry out thickening; Add Vanadium Pentoxide in FLAKES/alumina mixture; Add high temperature resistant weighting agent and high temperature resistant inorganic pigment that heat resisting temperature is more than 1500 DEG C successively, stirrer rotating speed is adjusted to high-speed stirring more than 30 points; With hondrometer determination mixture particle diameter be below 20 μm after, in said mixture, add deionized water carry out viscosity adjustment, the final obtained inorganic aqueous high-temperature heat-resistance coating of finished silicon phosphate-gallate series.
Described organoalkoxysilane is the one in methyltrimethoxy silane, Union carbide A-162, vinyltriethoxysilane, dimethoxydiphenylsilane, triethoxyl silane, 3-glycidoxypropyltrimethoxysilane alkane.
The each specific embodiment of the present invention is as shown in table 1.
The embodiment of table 1 silicate inorganic aqueous high-temperature heat-resistance coating different ratio
In described liquid sodium silicate, the mol ratio of silicon-dioxide and sodium oxide is 2.8 ~ 3.4: 1.
In described liquid silicic acid potassium, the mol ratio of silicon-dioxide and potassium oxide is 3.2 ~ 3.6: 1.
The particle size range of described silicon sol is at 10nm ~ 40nm.
The proportioning of described Vanadium Pentoxide in FLAKES/alumina mixture is: mass percent is the Vanadium Pentoxide in FLAKES of 25 ~ 35%, and mass percent is the aluminum oxide of 65 ~ 75%.
The performance of the various embodiments described above coating, will carry out test evaluation by project shown in table 2.
The making of test plate (panel): on 150mmx75mmx0.8mm iron plate, with spray gun spraying build to 50 ± 5 μm, after placing 30 minutes in Air drying or 80 DEG C of loft drier, can place 30 points of quick Fabrication test plate (panel)s in 180 ~ 200 DEG C of loft drier temperature.
The physical properties of table 2. film and testing method
The test result of the performance of each embodiment coating is as shown in table 3.
The characteristic test result of each embodiment coating of table 3.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. the inorganic aqueous high-temperature heat-resistance coating of silicate, is characterized in that, mixed by plurality of raw materials; Described raw material comprises: liquid silicon hydrochlorate 40 ~ 50 mass parts, deionized water 10 ~ 15 mass parts, organoalkoxysilane 2 ~ 5 mass parts, silicon sol 2 ~ 6 mass parts, aerogel 0.1 ~ 1 mass parts, aluminum phosphate 3 ~ 10 mass parts, Vanadium Pentoxide in FLAKES/alumina mixture 5 ~ 15 mass parts, high temperature resistant weighting agent 3 ~ 7 mass parts, high temperature resistant inorganic pigment 10 ~ 15 mass parts, liquid humectants 1 ~ 3 mass parts; Described liquid humectants is made up of liquid antifoam agent and dispersion agent;
Described liquid silicon hydrochlorate is made up of one or more in liquid sodium silicate, liquid silicic acid potassium, liquid silicic acid lithium; In described liquid silicic acid potassium, the mol ratio of silicon-dioxide and potassium oxide is 3.2 ~ 3.6: 1;
Described organoalkoxysilane is the one in methyltrimethoxy silane, Union carbide A-162, vinyltriethoxysilane, dimethoxydiphenylsilane, triethoxyl silane, 3-glycidoxypropyltrimethoxysilane alkane;
The particle size range of described silicon sol is at 10nm ~ 40nm;
The proportioning of described Vanadium Pentoxide in FLAKES/alumina mixture is: mass percent is the Vanadium Pentoxide in FLAKES of 25 ~ 35%, and mass percent is the aluminum oxide of 65 ~ 75%;
Described high temperature resistant weighting agent is zirconium white; Described high temperature resistant inorganic pigment is titanium dioxide.
2. for the preparation of the preparation method of the inorganic aqueous high-temperature heat-resistance coating of silicate described in claim 1, it is characterized in that, comprise the steps: 40 ~ 50 mass parts liquid silicon hydrochlorates and deionized water to feed intake, be stirred to uniform liquid shape; Add 2 ~ 5 mass parts organoalkoxysilanes again stirring at low speed 30 points, hydration reaction is fully carried out; Slowly added in 30 minutes by 2 ~ 6 mass parts silicon sol, interpolation limit, limit is stirred again; Add 0.1 ~ 1 mass parts aerogel afterwards and carry out thickening; Add 5 ~ 15 mass parts Vanadium Pentoxide in FLAKES/alumina mixtures; Add high temperature resistant weighting agent 3 ~ 7 mass parts and high temperature resistant inorganic pigment 10 ~ 15 mass parts that heat resisting temperature is more than 1500 DEG C successively, stirrer rotating speed is adjusted to high-speed stirring more than 30 points; With hondrometer determination mixture particle diameter be below 20 μm after, in said mixture, add deionized water carry out viscosity adjustment, finally obtained finished product; The otal investment of described deionized water is 10 ~ 15 mass parts.
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