CN112280342A - Inorganic anticorrosive fireproof coating and preparation method thereof - Google Patents
Inorganic anticorrosive fireproof coating and preparation method thereof Download PDFInfo
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- CN112280342A CN112280342A CN202011239849.6A CN202011239849A CN112280342A CN 112280342 A CN112280342 A CN 112280342A CN 202011239849 A CN202011239849 A CN 202011239849A CN 112280342 A CN112280342 A CN 112280342A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention provides an inorganic anticorrosive fireproof coating which comprises the following components in parts by weight: composite silica sol, silane compound, alumina sol, zirconia sol, inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder. The coating provided by the invention can form a compact coating film, is firmly adhered to the surface of an object, and has higher hardness; thereby providing the coating film with corrosion resistance, wear resistance and durability. When the temperature is over 200 ℃, the coating can be sintered more compactly and firmly, and still has good protective performance at high temperature. The zinc sulfate in the coating has good bactericidal capacity, so that the coating has an anti-corrosion effect. The combination of the active-SiX in the potassium silicate and the silane compound after hydrolysis and/or the cross-linking reaction between the-Si-OH bond and the magnesium powder generate an inorganic magnesium silicate space network structure, the strength and the toughness of the coating film are improved, and the coating film is prevented from cracking.
Description
Technical Field
The invention belongs to the technical field of paint manufacturing, and particularly relates to an inorganic anticorrosive fireproof paint and a preparation method thereof.
Background
The anticorrosion and fireproof functions of buildings are very important functions of buildings, and in order to realize the anticorrosion and fireproof functions, an anticorrosion and fireproof coating is generally adopted to be coated on the surface of the building. At present, one method of the fireproof coating is to adopt a flame-retardant organic polymer as a base material, but the organic polymer in the coating has toxicity to a human body and damage to the environment, and has attracted more and more attention; in another method, a flame retardant is added into the coating, which is a representative fire-retardant coating of halogen series, phosphorus series and the like, but some bromine fire-retardant coatings in the halogen series are controversial due to environmental protection problems; the anticorrosive paint is prepared with synthetic resin emulsion as base material, water as dispersing medium, pigment, assistant, etc. and through certain technological process, and has certain amount of volatile organic matter and certain harm to environment and human body.
Disclosure of Invention
The invention provides an inorganic anticorrosive fireproof coating and a preparation method thereof, aiming at overcoming the problems in the prior art, and the inorganic anticorrosive fireproof coating can play a role in corrosion-resistant shielding and sealing and can also play a role in fire prevention and isolation.
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 20-30 parts of composite silica sol, 20-30 parts of silane compound, 20-40 parts of alumina sol, 10-20 parts of zirconia sol, 18-27 parts of inorganic filler, 1-5 parts of defoaming agent, 3-8 parts of emulsifier, 4-6 parts of bentonite, 1-3 parts of zinc sulfate, 10-20 parts of deionized water, 2-5 parts of pigment and 5-8 parts of feldspar powder.
The silane compound has the formula Rn1R’n2SiXn3Yn4Wherein R represents hydrogen and R' represents an alkyl group having less than 10 carbon atoms; x is ester group, cyano, Y is hydroxyl; n1 is 0, 1, 2, n2 is 0, 1, 2N3 is 0, 1, 2, 3, 4, n4 is 0, 1, 2, 3, 4, n1+ n2+ n3+ n4 is 4, and n3 and n4 are not 0 at the same time. The inorganic filler is any one of montmorillonite, gneiss and rhyolite.
The invention also provides a preparation method of the inorganic anticorrosive fireproof coating, which comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 10-30%, the mass fraction of the potassium silicate is 10-30%, the mass fraction of the zinc oxide is 5-15%, the mass fraction of the deionized water is 30-50%, the mass fraction of the magnesium powder is 5-15%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5;
uniformly mixing powdery alumina with the particle size of 0.2-1.0 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10-20%;
uniformly mixing zirconia powder with the particle size of 0.2-1.0 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 10-20%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Compared with the prior art, the inorganic anti-corrosion fireproof coating provided by the invention has the advantages that the silane compound, the silica sol, the alumina sol and the zirconia sol form main components, the coating has certain adhesiveness, a compact coating can be formed after the coating is coated on the surface of an object, the compact coating forms a protective layer, so that the protective layer and a base layer formed by the surface of the object form mutual supporting force, the protective layer is firmly adhered to the surface of the object, and the inorganic anti-corrosion fireproof coating has higher hardness; thereby the coating film has corrosion resistance, wear resistance and durability; the feldspar powder can reduce the sintering temperature of the coating, so that the coating can be more compact and firmer in sintering when the coating is in a high-temperature state of more than 200 ℃, and the coating still has good protection performance at high temperature. The zinc sulfate in the coating has good bactericidal capacity, so that the coating has an anti-corrosion effect.
The combination of active-SiX in potassium silicate and silane compound after hydrolysis and/or the cross-linking reaction between-Si-OH bond and magnesium powder, which generates inorganic magnesium silicate space network structure rather than simple physical mosaic on the surface of coating, increases the strength and toughness of coating, prevents the coating from cracking, shields the protected layer on the surface of object, and prevents flame from directly extending at high temperature. In addition, since the coating material is mainly composed of inorganic materials, it is natural and has fire-retardant properties. The raw materials adopted by the paint provided by the invention are nontoxic and harmless, have no VOC components, and are healthy and environment-friendly.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In the following embodiments, the defoaming agent is a polyether-modified polysiloxane solution, the emulsifier is Tween 80, and the pigment is titanium dioxide.
Example 1
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 20 parts of composite silica sol, 20 parts of silane compound, 20 parts of alumina sol, 10 parts of zirconia sol, 18 parts of inorganic filler, 1 part of defoaming agent, 3 parts of emulsifier, 4 parts of bentonite, 1 part of zinc sulfate, 10 parts of deionized water, 2 parts of pigment and 5 parts of feldspar powder.
The silane compound has the molecular formula R' SiX2Y, wherein R' represents a methyl group; x is an ester group, and Y is a hydroxyl group; the inorganic filler is montmorillonite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water uniformly to obtainThe composite silica sol comprises silica powder with a particle size of 1 μm, wherein the silica powder comprises 10 wt%, potassium silicate 30 wt%, zinc oxide 5 wt%, deionized water 50 wt%, magnesium powder 5 wt%, and SiO in potassium silicate2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.2 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10%; uniformly mixing zirconia powder with the particle size of 0.2 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 10%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 2
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of composite silica sol, 25 parts of silane compound, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The molecular formula of the silane compound is RSiXY2Wherein R represents hydrogen, X is cyano, and Y is hydroxy; the inorganic filler is gneiss.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 20%, the mass fraction of the potassium silicate is 20%, the mass fraction of the zinc oxide is 10%, the mass fraction of the deionized water is 40%, the mass fraction of the magnesium powder is 10%, and SiO in the potassium silicate is2/K2Of OThe molar ratio is 2.5; uniformly mixing powdery alumina with the particle size of 0.6 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 15%; uniformly mixing zirconia powder with the particle size of 0.26 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 15%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 3
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 30 parts of composite silica sol, 30 parts of silane compound, 40 parts of alumina sol, 20 parts of zirconia sol, 27 parts of inorganic filler, 5 parts of defoaming agent, 8 parts of emulsifier, 6 parts of bentonite, 3 parts of zinc sulfate, 20 parts of deionized water, 5 parts of pigment and 8 parts of feldspar powder.
The silane compound has the formula R2SiXY, wherein R represents hydrogen, X is an ester group, and Y is a hydroxyl group; the inorganic filler is rhyolite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 30%, the mass fraction of the potassium silicate is 10%, the mass fraction of the zinc oxide is 15%, the mass fraction of the deionized water is 30%, the mass fraction of the magnesium powder is 15%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 1.0 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 20%; uniformly mixing zirconia powder with the particle size of 1.0 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia accounts for 20%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 4
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of composite silica sol, 25 parts of silane compound, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The silane compound has a molecular formula of RR 'SiXY, wherein R represents hydrogen, and R' represents nonyl; x is an ester group and Y is a hydroxyl group. The inorganic filler is gneiss.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 20%, the mass fraction of the potassium silicate is 20%, the mass fraction of the zinc oxide is 10%, the mass fraction of the deionized water is 40%, the mass fraction of the magnesium powder is 10%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.6 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 15%; uniformly mixing zirconia powder with the particle size of 0.26 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 15%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 5
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 20 parts of composite silica sol, 20 parts of silane compound, 20 parts of alumina sol, 10 parts of zirconia sol, 18 parts of inorganic filler, 1 part of defoaming agent, 3 parts of emulsifier, 4 parts of bentonite, 1 part of zinc sulfate, 10 parts of deionized water, 2 parts of pigment and 5 parts of feldspar powder.
The silane compound has the molecular formula SiXY3Wherein X is cyano and Y is hydroxy; the inorganic filler is montmorillonite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 10%, the mass fraction of the potassium silicate is 30%, the mass fraction of the zinc oxide is 5%, the mass fraction of the deionized water is 50%, the mass fraction of the magnesium powder is 5%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.2 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10%; uniformly mixing zirconia powder with the particle size of 0.2 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 10%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 6
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of composite silica sol, 25 parts of silane compound, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The silane compound has the molecular formula SiX4Wherein X is an ester group; the inorganic filler is gneiss.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 20%, the mass fraction of the potassium silicate is 20%, the mass fraction of the zinc oxide is 10%, the mass fraction of the deionized water is 40%, the mass fraction of the magnesium powder is 10%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.6 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 15%; uniformly mixing zirconia powder with the particle size of 0.26 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 15%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 7
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 20 parts of composite silica sol, 20 parts of silane compound, 20 parts of alumina sol, 10 parts of zirconia sol, 18 parts of inorganic filler, 1 part of defoaming agent, 3 parts of emulsifier, 4 parts of bentonite, 1 part of zinc sulfate, 10 parts of deionized water, 2 parts of pigment and 5 parts of feldspar powder.
The silane compound has the molecular formula SiY4Wherein Y is hydroxy; the inorganic filler is montmorillonite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 10%, the mass fraction of the potassium silicate is 30%, the mass fraction of the zinc oxide is 5%, the mass fraction of the deionized water is 50%, the mass fraction of the magnesium powder is 5%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.2 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10%; uniformly mixing zirconia powder with the particle size of 0.2 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 10%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 8
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 30 parts of composite silica sol, 30 parts of silane compound, 40 parts of alumina sol, 20 parts of zirconia sol, 27 parts of inorganic filler, 5 parts of defoaming agent, 8 parts of emulsifier, 6 parts of bentonite, 3 parts of zinc sulfate, 20 parts of deionized water, 5 parts of pigment and 8 parts of feldspar powder.
The silane compound has the molecular formula SiX3Y, wherein X is cyano and Y is hydroxy; the inorganic filler is rhyolite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 30%, the mass fraction of the potassium silicate is 10%, the mass fraction of the zinc oxide is 15%, the mass fraction of the deionized water is 30%, and the mass fraction of the magnesium powder is 30%The weight percentage is 15 percent, and SiO in the potassium silicate2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 1.0 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 20%; uniformly mixing zirconia powder with the particle size of 1.0 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia accounts for 20%;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Example 9
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 20 parts of composite silica sol, 20 parts of silane compound, 20 parts of alumina sol, 10 parts of zirconia sol, 18 parts of inorganic filler, 1 part of defoaming agent, 3 parts of emulsifier, 4 parts of bentonite, 1 part of zinc sulfate, 10 parts of deionized water, 2 parts of pigment and 5 parts of feldspar powder.
The silane compound has the molecular formula SiX2Y2Wherein X is an ester group and Y is a hydroxyl group; the inorganic filler is montmorillonite.
A preparation method of an inorganic anticorrosive fireproof coating comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 10%, the mass fraction of the potassium silicate is 30%, the mass fraction of the zinc oxide is 5%, the mass fraction of the deionized water is 50%, the mass fraction of the magnesium powder is 5%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5; uniformly mixing powdery alumina with the particle size of 0.2 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10%; uniformly mixing zirconia powder with the particle size of 0.2 mu m and deionized water to obtain zirconia solThe mass fraction of the zirconium oxide is 10 percent;
step 2: adding composite silica sol, silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding inorganic filler, defoaming agent, emulsifier, bentonite, zinc sulfate, deionized water, pigment and feldspar powder, continuously stirring for 2 hours, and adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
Comparative example 1
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of composite silica sol, 25 parts of silane compound, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water and 3 parts of pigment.
The silane compound has a molecular formula of RR 'SiXY, wherein R represents hydrogen, and R' is nonyl; x is an ester group and Y is a hydroxyl group. The inorganic filler is gneiss.
The preparation method of an inorganic anticorrosive fireproof coating is the same as that of example 4.
Comparative example 2
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of silane compound, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The silane compound has a molecular formula of RR 'SiXY, wherein R represents hydrogen, and R' is nonyl; x is an ester group and Y is a hydroxyl group. The inorganic filler is gneiss.
The preparation method of an inorganic anticorrosive fireproof coating is the same as that of example 4.
Comparative example 3
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 25 parts of composite silica sol, 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The inorganic filler is gneiss.
The preparation method of an inorganic anticorrosive fireproof coating is the same as that of example 4.
Comparative example 4
The inorganic anticorrosive fireproof coating comprises the following components in parts by weight: 30 parts of alumina sol, 15 parts of zirconia sol, 23 parts of inorganic filler, 3 parts of defoaming agent, 6 parts of emulsifier, 5 parts of bentonite, 2 parts of zinc sulfate, 15 parts of deionized water, 3 parts of pigment and 7 parts of feldspar powder.
The silane compound has a molecular formula of RR 'SiXY, wherein R represents hydrogen, and R' is nonyl; x is ester group, cyano, Y is hydroxyl. The inorganic filler is gneiss.
The preparation method of an inorganic anticorrosive fireproof coating is the same as that of example 4.
TABLE 1 Properties of coating films of various embodiments
Note: the adhesion test was carried out using the circling method (GB/T1720). The temperature resistance is that the coating sample in each embodiment is coated on the surface of an object, sintered for 2h at 200 ℃, then placed in an environment at 400 ℃ for 2h, and the change condition of a coating film is observed. Hardness was measured using a pencil scratch hardness tester. The abrasion resistance was determined according to GB1768-89 and the fire rating was rated according to DIN 4102.
As can be seen from Table 1, the composite silica sol and the silane compound have a synergistic effect on the adhesion, hardness and abrasion resistance of the coating; the feldspar powder component in the coating enables the sintered coating to have better mechanical property and can keep excellent protection effect in a high-temperature environment; at the same time, the coating of the invention has the highest fire-proof rating.
Claims (3)
1. The inorganic anticorrosive fireproof coating is characterized by comprising the following components in parts by weight: 20-30 parts of composite silica sol, 20-30 parts of silane compound, 20-40 parts of alumina sol, 10-20 parts of zirconia sol, 18-27 parts of inorganic filler, 1-5 parts of defoaming agent, 3-8 parts of emulsifier, 4-6 parts of bentonite, 1-3 parts of zinc sulfate, 10-20 parts of deionized water, 2-5 parts of pigment and 5-8 parts of feldspar powder;
the silane compound has the formula Rn1R’n2 SiXn3Yn4Wherein R represents hydrogen and R' represents an alkyl group having less than 10 carbon atoms; x is an ester group or a cyano group, and Y is a hydroxyl group; n1 is 0, 1, 2, n2 is 0, 1, 2, n3 is 0, 1, 2, 3, 4, n4 is 0, 1, 2, 3, 4, n1+ n2+ n3+ n4 is 4, and n3 and n4 are not 0 at the same time.
2. The inorganic anticorrosive fireproof paint of claim 1, wherein the inorganic filler is any one of montmorillonite, gneiss and rhyolite.
3. The preparation method of the inorganic anticorrosive fireproof coating according to claim 1, wherein the preparation method comprises the following steps:
step 1: uniformly mixing silicon dioxide powder, potassium silicate, zinc oxide, magnesium powder and deionized water to obtain composite silica sol, wherein the particle size of the silicon dioxide powder is 1 mu m, the mass fraction of the silicon dioxide is 10-30%, the mass fraction of the potassium silicate is 10-30%, the mass fraction of the zinc oxide is 5-15%, the mass fraction of the deionized water is 30-50%, the mass fraction of the magnesium powder is 5-15%, and SiO in the potassium silicate is2/K2The molar ratio of O is 2.5;
uniformly mixing powdery alumina with the particle size of 0.2-1.0 mu m and deionized water to obtain alumina sol, wherein the mass fraction of the alumina is 10-20%;
uniformly mixing zirconia powder with the particle size of 0.2-1.0 mu m and deionized water to obtain zirconia sol, wherein the mass fraction of zirconia is 10-20%;
step 2: adding composite silica sol, a silane compound, alumina sol and zirconia sol into a mixing tank, stirring for 2 hours at the rotating speed of 800r/min, adding an inorganic filler, a defoaming agent, an emulsifier, bentonite, zinc sulfate, deionized water, a pigment and feldspar powder, continuously stirring for 2 hours, and then adjusting the pH value of the mixture to be 8 to obtain the inorganic anticorrosive fireproof coating.
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