CN110591425A - Inorganic anti-doodling environment-friendly coating and preparation method thereof - Google Patents
Inorganic anti-doodling environment-friendly coating and preparation method thereof Download PDFInfo
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- 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
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- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1668—Vinyl-type polymers
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
Abstract
The invention discloses an inorganic anti-doodling environment-friendly coating which comprises the following components in percentage by mass: 20-40% of water glass, 10-20% of silica sol solution, 5-8% of fluorocarbon emulsion, 2-5% of rutile titanium dioxide, 3-5% of filler, 0.1-1% of fumed silica, 0.1-0.5% of surfactant, 1-3% of functional pigment, 0.05-0.1% of defoaming agent and the balance of water; the inorganic anti-doodling environment-friendly paint has the advantages of environmental protection, zero formaldehyde, safety, extremely low VOC, acid resistance, alkali resistance and scrubbing resistance. In addition, the invention discloses a preparation method of the inorganic anti-doodling environment-friendly coating, and the preparation method has the advantages of promoting the uniform mixing of the components of the raw materials, accelerating the dissolution of the components, saving the preparation time, along with simple preparation process and low operation requirement.
Description
Technical Field
The invention relates to the technical field of inorganic coatings, in particular to an inorganic anti-doodling environment-friendly coating and a preparation method thereof.
Background
The common problem of the exterior wall coating is caused by the insufficient stain resistance of the coating. And is also an outstanding technical problem which restricts the popularization and application of the external wall coating in China. Fluorocarbon resin and organic silicon modified acrylic resin with low surface energy are generally adopted at home and abroad, or fluorine-containing and silicon-containing auxiliaries are added into the coating to reduce the attachment of pollutants, so that the stain resistance of the coating is improved.
At present, Chinese patent application No. CN2006100291638 discloses a preparation method of self-cleaning fluorocarbon resin coating. The preparation method mainly comprises the following steps: firstly, reacting diisocyanate with trihydric alcohol to a certain degree, then adding metered polyethylene glycol monoether for reaction to prepare branched modified diisocyanate, and then reacting the modified diisocyanate with fluorocarbon resin to obtain the self-cleaning fluorocarbon resin. The self-cleaning fluorocarbon resin is prepared into a coating by a conventional method, hydrophilic molecular groups of the coating migrate to the surface of the coating after construction, so that the surface of the coating is hydrophilized, and the coating has a self-cleaning function; meanwhile, the fluorocarbon resin forms a compact coating film at the bottom of the coating, so that pollutants are prevented from entering the interior of the coating film along with rainwater to form permanent pollution.
However, the fluorocarbon resin coating has the following defects in the actual production and use process:
(1) the preparation cost is high: the total cost for producing 8kg of coating is at least 1.5 ten thousand, the production time is at least 6 hours, and the preparation operation requirement is higher;
(2) there is a health risk: raw materials for producing the coating are all organic compounds, a certain amount of volatile harmful pollutants are inevitably contained, and meanwhile, toxic and volatile diisocyanate is needed to be used in the preparation process, so that the potential health risk and the environmental pollution risk are high.
Therefore, how to prepare a coating with low cost, low health and environmental risk is a problem to be solved in the industry.
Disclosure of Invention
Aiming at the defects in the prior art, the first purpose of the invention is to provide an inorganic anti-doodling environment-friendly coating, so that the prepared coating has the advantages of environmental protection, safety and extremely low VOC.
In order to achieve the first object, the invention provides the following technical scheme: an inorganic anti-doodling environment-friendly coating comprises the following components in percentage by mass:
20-40% of water glass, 10-20% of silica sol solution, 5-8% of fluorocarbon emulsion, 2-5% of rutile titanium dioxide, 3-5% of filler, 0.1-1% of fumed silica, 0.1-0.5% of surfactant, 1-3% of functional pigment and defoaming agent: 0.05-0.1% and the balance of water.
By adopting the technical scheme, 1, as water glass, silica sol and fluorocarbon emulsion are adopted to be used as a base material of the coating and as a film forming material, the coating has good hardness and wear resistance, the silica sol has waterproof and corrosion-resistant effects in the coating, the main components of the silica sol are silicon dioxide and water, the silicon dioxide and the water are the most stable and environment-friendly substances in nature, and meanwhile, the acid resistance and alkali resistance of the whole coating are enhanced; the fluorocarbon latex has water resistance and stain resistance;
2. the fumed silica is used as a dispersing agent, organic matters, inorganic matters and other components are uniformly dispersed in water, so that the pigment and the filler are improved, the pollution resistance is improved, the strength of a paint film is enhanced, and meanwhile, the fumed silica is pollution-free, has no influence on the prepared VOC and cannot cause an incompatible state with other components;
3. the rutile titanium dioxide is powder with good whiteness and large hardness, has better covering power, tinting strength, corrosion resistance and weather resistance, and has larger reflection effect on sunlight, thereby playing a role in heat preservation and insulation;
4. the surfactant mainly plays a role in emulsification, and can uniformly disperse organic fluorocarbon emulsion, silica sol solution, inorganic sodium silicate and other components in water to form emulsion, so that uniformly mixed emulsion paint is obtained, the adhesive force of the paint is enhanced, and a layer of coating with a protective effect is formed; the filler plays a role of a skeleton in the coating, so that the coating is thicker and firmer and has good covering power;
5. the functional pigment not only has the functions of endowing the coating with color, increasing the strength of the coating, reducing the shrinkage, reducing the internal stress in the drying and curing process, and improving the adhesive force of the coating;
6. the defoaming agent reduces the surface tension of foam to cause the foam to break, and contains hydrophobic particles, the hydrophobic particles are on the surface of the foam thin layer, the surfactant begins to be adsorbed at the top of the surface of the thin layer, and the foam breaks due to the gradual disappearance of the surfactant; therefore, the components are mixed and stirred according to the proportion, so that the inorganic anti-doodling environment-friendly coating is prepared, and has the excellent performances of environment friendliness, zero formaldehyde, safety, extremely low VOC, acid resistance, alkali resistance and scrubbing resistance.
Further, the paint comprises the following components in percentage by mass:
35-39% of water glass, 10-15% of silica sol solution, 3-8% of fluorocarbon emulsion, 2-5% of rutile titanium dioxide, 3-5% of filler, 0.6-1% of fumed silica, 0.3-0.5% of surfactant, 2-3% of functional pigment, 0.06-0.08% of defoaming agent and the balance of water.
Further, the paint comprises the following components in percentage by mass:
37% of water glass, 12.5% of silica sol solution, 7% of fluorocarbon emulsion, 4% of rutile titanium dioxide, 4% of filler, 0.8% of fumed silica, 0.4% of surfactant, 2.5% of functional pigment, 0.07% of defoaming agent and the balance of water.
Further, the water glass comprises potassium silicate and sodium silicate solution, and the mass ratio of the potassium silicate to the sodium silicate is 1: 1.
By adopting the technical scheme, the water glass is alkali metal silicate with good water solubility and has the function of a binder, and the silicate with the best cohesiveness is sodium silicate and potassium silicate; meanwhile, both the water-soluble paint and the water-soluble paint are soluble and are easy to dissolve in the preparation process, and the prepared paint can generate an insoluble substance with carbon dioxide in the air when being applied to buildings, so that the water-resistant paint has water resistance. Therefore, the prepared coating has better binding power and the strength of the coating is improved.
Further, the filler includes barium sulfate and magnesium sulfate.
By adopting the technical scheme, the thickness, the wear resistance, the water resistance, the heat resistance, the surface hardness, the acid-base resistance, the corrosion resistance and the impact resistance of the coating are improved due to the adoption of the barium sulfate and the magnesium sulfate, and meanwhile, the barium sulfate has very high reflectivity in the range of 300-400 microns in wavelength, so that the coating can be protected from aging, and the barium sulfate is an effective and cheap inorganic light stabilizer with certain covering property; therefore, the use cost of raw materials is saved, and the service life of the coating is prolonged.
Further, the functional pigment is selected from one of copper chromium black, titanium nickel yellow, titanium chromium brown, cobalt blue and cobalt green.
By adopting the technical scheme, 1, as the copper chromium black, the titanium nickel yellow, the titanium chromium brown, the cobalt blue and the cobalt green are all high-temperature-resistant heat-insulation pigments, the radiation heat of infrared rays and the conduction of heat can be effectively inhibited and shielded, the heat radiation of a high-temperature object and the dissipation of heat are inhibited, and the paint is pollution-free and acid-resistant; therefore, the prepared coating has the effects of acid and alkali resistance, high temperature resistance, heat insulation and heat preservation;
2. the coating using the functional pigment can protect a substrate from corrosion, oxidation, sealing protection and the like in high-temperature gas (smoke), fire and high-temperature liquid (seawater and sewage) environments, has high stability and wear resistance, can react with other active molecules in the high-temperature environment, and has long service life;
3. the coating has the advantages of good waterproof sealing performance, convenient coating, long service life, acid and alkali resistance, ageing resistance, self-cleaning property and wear resistance, can well keep the matrix from being eroded by water, liquid and steam, prolongs the service life of the matrix, and can be directly coated on high-temperature flues, chimneys, concrete, various metals, fiber surfaces, insulating bricks and the like; therefore, the paint prepared by the pigment can be coated in a thin layer, and has the advantages of acid and alkali resistance, water resistance, good adhesion and convenient construction.
Further, the silica sol is an alkaline silica sol, and the pH = 9-10.
By adopting the technical scheme, the potassium silicate and the sodium silicate which are contained in the water glass are weak acid and strong alkali solutions, so that the water glass solution presents an alkaline environment, and the alkaline silica sol is adapted to the alkaline environment of the water glass, so that the whole process for preparing the coating is in a stable state.
The second purpose of the invention is to provide a preparation method of the inorganic anti-doodling environment-friendly coating, which has the advantages of promoting the uniform mixing of the raw materials, accelerating the dissolution of the components, saving the preparation time, along with simple preparation process and low operation requirement.
In order to achieve the second object, the invention provides the following technical scheme: the preparation method of the inorganic anti-doodling environment-friendly coating comprises the following steps:
s1: adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 350r/min and 250-;
s2: the slurry obtained in the S1 is added with fluorocarbon emulsion, water glass and silica sol solution in sequence at the rotation speed of 550-650r/min and mixed evenly;
s3: the obtained base material is added with functional pigment according to the formula amount at the rotating speed of 750-850r/min to prepare the coating.
By adopting the technical scheme, the raw materials are uniformly mixed by firstly stirring at a low speed and then stirring at a high speed, on the one hand, the dissolution among the components is accelerated, the preparation time is saved, the preparation process is simple, and the operation requirement is low.
Further, the preparation temperature in the steps S1, S2 and S3 is 15-30 ℃.
By adopting the technical scheme, the temperature in the process of preparing the coating is 15-30 ℃, when the temperature is lower than 15 ℃, the dissolution speed among the components is low, and the dissolution time is long; when the temperature is higher than 30 ℃, the solution forms a binder between the water glass and the silica sol, so that the crosslinking between the water glass and the silica sol is accelerated, the components are not uniformly dispersed, and the using effect of the coating is influenced.
In conclusion, the invention has the following beneficial effects:
firstly, because the inorganic anti-doodling environment-friendly coating prepared by the invention adopts the inorganic water glass, the silica sol and the fluorocarbon emulsion as the base materials and passes through other components, the prepared coating has the effects of environment protection, zero formaldehyde, safety, extremely low VOC, acid resistance, alkali resistance and scrubbing resistance.
Secondly, the method of the invention promotes the uniform mixing of the raw materials and the components on the one hand, accelerates the dissolution of the components on the other hand, saves the preparation time, and has simple preparation process and low operation requirement by stirring at low speed and then at high speed.
Detailed Description
The present invention will be described in further detail with reference to examples.
The raw material sources are as follows: see Table 1 below
TABLE 1 sources of the components of the inorganic anti-graffiti environmental protection coating
Example 1: a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 100 parts of 45% potassium silicate solution, 100 parts of 40% sodium silicate solution, 100 parts of 40% silica sol solution, 50 parts of 48% fluorocarbon emulsion, 20 parts of rutile titanium dioxide, 15 parts of barium sulfate, 15 parts of magnesium sulfate, 1 part of fumed silica, 1 part of 30% fluorocarbon surfactant, 10 parts of copper-chromium black, 0.5 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) the water, the defoaming agent for fluorocarbon paint, 30% of fluorocarbon surfactant, fumed silica, rutile titanium dioxide, barium sulfate and magnesium sulfate which are weighed according to the proportion are sequentially added into a dispersion cylinder, uniformly mixed at the rotating speed of 300r/min and then dispersed for 40 minutes at the rotating speed of 1300r/min until the fineness of the slurry is less than or equal to 40 micrometers, and the fineness of the slurry is measured by a rod-scraping fineness gauge.
(3) Adding 48 percent of fluorocarbon emulsion, 45 percent of potassium silicate solution, 40 percent of sodium silicate solution and silica sol solution into the obtained slurry in sequence at the rotating speed of 600r/min, and uniformly mixing to obtain a base material;
(4) adding the weighed copper-chromium black with the formula ratio into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 2:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 175 parts of 45% potassium silicate solution, 175 parts of 40% sodium silicate solution, 100 parts of 40% silica sol solution, 60 parts of 48% fluorocarbon emulsion, 30 parts of rutile titanium dioxide, 15 parts of barium sulfate, 15 parts of magnesium sulfate, 6 parts of fumed silica, 3 parts of 30% fluorocarbon surfactant, 20 parts of copper-chromium black, 0.6 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) the water, the defoaming agent for fluorocarbon paint, 30% of fluorocarbon surfactant, fumed silica, rutile titanium dioxide, barium sulfate and magnesium sulfate which are weighed according to the proportion are sequentially added into a dispersion cylinder, uniformly mixed at the rotating speed of 300r/min and then dispersed for 40 minutes at the rotating speed of 1300r/min until the fineness of the slurry is less than or equal to 40 micrometers, and the fineness of the slurry is measured by a rod-scraping fineness gauge.
(3) Adding 48 percent of fluorocarbon emulsion, 45 percent of potassium silicate solution, 40 percent of sodium silicate solution and silica sol solution into the obtained slurry in sequence at the rotating speed of 600r/min, and uniformly mixing to obtain a base material;
(4) adding the weighed copper-chromium black with the formula ratio into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 3:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 185 parts of 45% potassium silicate solution, 185 parts of 40% sodium silicate solution, 125 parts of 40% silica sol solution, 70 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 4 parts of 30% fluorocarbon surfactant, 2.5 parts of copper-chromium black, 0.7 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) the water, the defoaming agent for fluorocarbon paint, 30% of fluorocarbon surfactant, fumed silica, rutile titanium dioxide, barium sulfate and magnesium sulfate which are weighed according to the proportion are sequentially added into a dispersion cylinder, uniformly mixed at the rotating speed of 300r/min and then dispersed for 40 minutes at the rotating speed of 1300r/min until the fineness of the slurry is less than or equal to 40 micrometers, and the fineness of the slurry is measured by a rod-scraping fineness gauge.
(3) Adding 48 percent of fluorocarbon emulsion, 45 percent of potassium silicate solution, 40 percent of sodium silicate solution and silica sol solution into the obtained slurry in sequence at the rotating speed of 600r/min, and uniformly mixing to obtain a base material;
(4) adding the weighed copper-chromium black with the formula ratio into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 4:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 195 parts of 45% potassium silicate solution, 195 parts of 40% sodium silicate solution, 150 parts of 40% silica sol solution, 80 parts of 48% fluorocarbon emulsion, 50 parts of rutile titanium dioxide, 25 parts of barium sulfate, 25 parts of magnesium sulfate, 10 parts of fumed silica, 5 parts of 30% fluorocarbon surfactant, 30 parts of copper-chromium black, 0.8 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) the water, the defoaming agent for fluorocarbon paint, 30% of fluorocarbon surfactant, fumed silica, rutile titanium dioxide, barium sulfate and magnesium sulfate which are weighed according to the proportion are sequentially added into a dispersion cylinder, uniformly mixed at the rotating speed of 300r/min and then dispersed for 40 minutes at the rotating speed of 1300r/min until the fineness of the slurry is less than or equal to 40 micrometers, and the fineness of the slurry is measured by a rod-scraping fineness gauge.
(3) Adding 48 percent of fluorocarbon emulsion, 45 percent of potassium silicate solution, 40 percent of sodium silicate solution and silica sol solution into the obtained slurry in sequence at the rotating speed of 600r/min, and uniformly mixing to obtain a base material;
(4) adding the weighed copper-chromium black with the formula ratio into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 5:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 200 parts of 45% potassium silicate solution, 200 parts of 40% sodium silicate solution, 200 parts of 40% silica sol solution, 80 parts of 48% fluorocarbon emulsion, 50 parts of rutile titanium dioxide, 25 parts of barium sulfate, 25 parts of magnesium sulfate, 10 parts of fumed silica, 5 parts of 30% fluorocarbon surfactant, 30 parts of copper-chromium black, 1 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) the water, the defoaming agent for fluorocarbon paint, 30% of fluorocarbon surfactant, fumed silica, rutile titanium dioxide, barium sulfate and magnesium sulfate which are weighed according to the proportion are sequentially added into a dispersion cylinder, uniformly mixed at the rotating speed of 300r/min and then dispersed for 40 minutes at the rotating speed of 1300r/min until the fineness of the slurry is less than or equal to 40 micrometers, and the fineness of the slurry is measured by a rod-scraping fineness gauge.
(3) Adding 48 percent of fluorocarbon emulsion, 45 percent of potassium silicate solution, 40 percent of sodium silicate solution and silica sol solution into the obtained slurry in sequence at the rotating speed of 600r/min, and uniformly mixing to obtain a base material;
(4) adding the weighed copper-chromium black with the formula ratio into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 6:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 185 parts of 45% potassium silicate solution, 185 parts of 40% sodium silicate solution, 125 parts of 40% silica sol solution, 70 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 4 parts of 30% fluorocarbon surfactant, 25 parts of copper-chromium black, 0.7 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =10, D =30 nm;
(2) adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 300r/min, and then dispersing for 40 minutes at a rotating speed of 1300r/min until the fineness of the slurry measured by a rod-scraping fineness meter is less than or equal to 40 micrometers;
(3) sequentially adding fluorocarbon emulsion, water glass and silica sol solution into the obtained slurry at the rotating speed of 600r/min, and uniformly mixing;
(4) adding the copper-chromium black with the formula amount into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 7:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 185 parts of 45% potassium silicate solution, 185 parts of 40% sodium silicate solution, 125 parts of 40% silica sol solution, 70 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 4 parts of 30% fluorocarbon surfactant, 25 parts of titanium nickel yellow, 0.7 part of defoaming agent for fluorocarbon paint and the balance of water according to 1000 parts by weight of paint; silica sol pH =8, D =30 nm;
(2) adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 300r/min, and then dispersing for 40 minutes at a rotating speed of 1300r/min until the fineness of the slurry measured by a rod-scraping fineness meter is less than or equal to 40 micrometers;
(3) sequentially adding fluorocarbon emulsion, water glass and silica sol solution into the obtained slurry at the rotating speed of 600r/min, and uniformly mixing;
(4) adding the titanium-nickel yellow with the formula amount into the obtained base material at the rotating speed of 800r/min to prepare the coating.
Example 8:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 165 parts of 45% potassium silicate solution, 165 parts of 40% sodium silicate solution, 180 parts of 40% silica sol solution, 50 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 3 parts of fluorocarbon surfactant, 2 parts of titanium chromium brown, 7 parts of 30% fluorocarbon surfactant and the balance of water according to 1000 parts by weight of coating; silica sol pH8, D30 nm;
(2) adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 300r/min, and then dispersing for 40 minutes at a rotating speed of 1300r/min until the fineness of the slurry measured by a rod-scraping fineness meter is less than or equal to 40 micrometers;
(3) sequentially adding fluorocarbon emulsion, water glass and silica sol solution into the obtained slurry at the rotating speed of 600r/min, and uniformly mixing;
(4) adding the titanium chromium brown with the formula amount into the obtained base material at the rotating speed of 800r/min to prepare the coating.
Example 9:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 165 parts of 45% potassium silicate solution, 165 parts of 40% sodium silicate solution, 180 parts of 40% silica sol solution, 50 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 3 parts of fluorocarbon surfactant, 2 parts of cobalt blue, 7 parts of 30% fluorocarbon surfactant and the balance of water according to 1000 parts by weight of coating; silica sol pH =8, D30 nm;
(2) adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 300r/min, and then dispersing for 40 minutes at a rotating speed of 1300r/min until the fineness of the slurry measured by a rod-scraping fineness meter is less than or equal to 40 micrometers;
(3) sequentially adding fluorocarbon emulsion, water glass and silica sol solution into the obtained slurry at the rotating speed of 600r/min, and uniformly mixing;
(4) adding cobalt blue with the formula amount into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Example 10:
a preparation method of an inorganic anti-doodling environment-friendly coating comprises the following steps:
(1) preparing materials: weighing 165 parts of 45% potassium silicate solution, 165 parts of 40% sodium silicate solution, 180 parts of 40% silica sol solution, 50 parts of 48% fluorocarbon emulsion, 40 parts of rutile titanium dioxide, 20 parts of barium sulfate, 20 parts of magnesium sulfate, 8 parts of fumed silica, 3 parts of fluorocarbon surfactant, 2 parts of cobalt green, 7 parts of 30% fluorocarbon surfactant and the balance of water according to 1000 parts by weight of coating; silica sol pH8, D30 nm;
(2) adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 300r/min, and then dispersing for 40 minutes at a rotating speed of 1300r/min until the fineness of the slurry measured by a rod-scraping fineness meter is less than or equal to 40 micrometers;
(3) sequentially adding fluorocarbon emulsion, water glass and silica sol solution into the obtained slurry at the rotating speed of 600r/min, and uniformly mixing;
(4) adding the cobalt green with the formula amount into the obtained base material at the rotating speed of 800r/min to obtain the coating.
Comparative example 1:
a preparation method of a self-cleaning fluorocarbon resin coating comprises the following steps;
666g of isophorone diisocyanate and 134g of trimethylolpropane are put into a reaction kettle and stirred to react for 3 hours at 85 ℃. 514g of polyethylene glycol monoether was then added and the reaction was stirred at 85 ℃ for 2 hours. 5256g of fluorocarbon resin was then added, stirred at 85 ℃ for 2 hours, cooled to room temperature, and discharged, obtained from clean fluorocarbon resin. Then preparing the self-cleaning fluorocarbon resin and a biuret curing agent into a double-component powder coating according to a conventional method.
Comparative example 2:
a preparation method of a self-cleaning fluorocarbon resin coating comprises the following steps;
522g of hexamethylene diisocyanate and 134g of trimethylolpropane were put into a reaction vessel and stirred at 75 ℃ for 4 hours. 954g of polyethylene glycol monoether was then added thereto, and the reaction was stirred at 75 ℃ for 2 hours. 5256g of fluorocarbon resin was then added, stirred at 80 ℃ for reaction for 3.5 hours, cooled to room temperature, and discharged, obtained from clean fluorocarbon resin. Then preparing the self-cleaning fluorocarbon resin and a biuret curing agent into a double-component powder coating according to a conventional method.
The inorganic anti-graffiti environmental protection of examples 1-10 and comparative examples 1 and 2 were subjected to film coating with a spray coater, and the film properties were tested, the test items including graffiti resistance, anti-sticking property, salt spray resistance, adhesion, and photocatalytic effect.
Wherein the anti-graffiti test method adopts Standard ASTMD6578-00 Standard Practice for
The principle of the standard method is that a Graffiti material is applied to the surface of a coating, the Graffiti surface is cleaned according to a specified cleaning method after a certain period of time, and the scrawlability of the coating is represented by a cleanable grade.
The anti-sticking test method adopts GB/T2792-1998 pressure sensitive adhesive tape 180 degree peel strength test method, uses 3M single-side marking adhesive tape as a simulation sticking object, and observes whether the coating layer is peeled off, has obvious light loss and has adhesive residue.
The salt spray resistance test is to place the coated sample plate in a salt spray box, observe the corrosion, spreading and foaming degree of the sample plate after a period of time, and record the occurrence of corrosion or foaming time.
The adhesion test method is carried out by using a scribing X method and is measured by using GB/T9286-1998 standard.
Wherein VOC test method U.S. Standard ASTM/D2369-90 tests coagulants. About 0.5 grams of coagulant was weighed into a weighed aluminum pan and then placed in a forced air oven heated to 110 c for 1 hour dwell time. The plates were reweighed and the weight lost represented the percent (%) of VOC in the coagulant.
And (3) testing the water contact angle of the paint sprayed on the aluminum plate by using a water contact angle tester to represent the hydrophobic property of the paint.
And (3) scratch resistance, and performing hardness test on the coating product by referring to national standard GB/T6739-2006 'paint film hardness test by colored paint and varnish pencil method'.
RCA tape Abrasion Resistance Test the Abrasion Resistance of the above coating products was tested using RCA tape Abrasion Resistance tester with reference to US Standard ASTM/F2357-2010 Standard Test Method for Determining the Abrasion Resistance of the Inksand coating on Membrane switch using the Norman Tool "RCA" Abrader ".
Table 2 example test results
As described in Table 2 above, the coating products of the examples 1-10 have better graffiti resistance, cling resistance, than the coating products of comparative examples 1, 2; for the water contact angle, the contact angles of the examples 1-10 are all larger than 110 degrees, the hydrophobicity is good, the coating can be subjected to the washing of rainwater when being used on an aluminum sheet curtain wall, no residue is generated, dust is not easy to adhere to the surface of the coating, and the excellent self-cleaning performance is shown; the examples 1-10 are placed in a salt-tolerant box, and the corrosion or foaming time is more than 3500 hours, so that the corrosion resistance is excellent compared with the comparative examples 1 and 2; the VOC test results show that the VOC in the examples 1-10 has good environmental protection property compared with the VOC in the comparative examples 1 and 2; the hardness of the examples 1-10 and the wear-resisting times of the RCA paper tape are both greater than those of the comparative examples 1 and 2, which shows that the coating prepared by the method has higher hardness and better wear resistance; the adhesive force of the paint in the examples 1-10 is strong, and the paint is not easy to fall off once being sprayed on a base material, so that the service life of the paint is prolonged.
After examples 1 to 10 and comparative examples 1 and 2 were sprayed on an aluminum plate, a graffiti pen was used to write on the coating film, and then the coating film was wiped, and it was found that the coating films of examples 1 to 10 were easily wiped off and had no residue, indicating that the coating prepared by the method of the present invention had good wiping effect, and when applied to an aluminum plate curtain wall, the cleaning was very simple and the original appearance was restored, and the clean appearance of the aluminum plate curtain wall was maintained, even if stains were present on the surface of the coating after a long period of use.
In examples 1-10, the addition of pigments of different pH values of the silica sol solution, copper chromium black, titanium nickel yellow, titanium chromium brown, cobalt blue and cobalt green had no significant effect on the performance of the coating.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. The inorganic anti-doodling environment-friendly coating is characterized by comprising the following components in percentage by mass:
20-40% of water glass, 10-20% of silica sol solution, 5-8% of fluorocarbon emulsion, 2-5% of rutile titanium dioxide, 3-5% of filler, 0.1-1% of fumed silica, 0.1-0.5% of surfactant, 1-3% of functional pigment, 0.05-0.1% of defoaming agent and the balance of water.
2. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized by comprising the following components in percentage by mass:
35-39% of water glass, 10-15% of silica sol solution, 6-8% of fluorocarbon emulsion, 3-5% of rutile titanium dioxide, 3-5% of filler, 0.6-1% of fumed silica, 0.3-0.5% of surfactant, 2-3% of functional pigment, 0.06-0.08% of defoaming agent and the balance of water.
3. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized in that: the paint comprises, by mass, 37% of water glass, 12.5% of a silica sol solution, 7% of a fluorocarbon emulsion, 4% of rutile titanium dioxide, 4% of a filler, 0.8% of fumed silica, 0.4% of a surfactant, 2.5% of a functional pigment, 0.07% of a defoaming agent, and the balance of water.
4. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized in that: the water glass comprises potassium silicate and sodium silicate solution, and the mass ratio of the potassium silicate to the sodium silicate solution is 1: 1.
5. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized in that: the filler is a mixture of barium sulfate and magnesium sulfate.
6. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized in that: the functional pigment is selected from one of copper chromium black, titanium nickel yellow, titanium chromium brown, cobalt blue and cobalt green.
7. The inorganic anti-doodling environment-friendly paint as claimed in claim 1, characterized in that: the silica sol is alkaline silica sol, and the pH = 9-10.
8. The preparation method of the inorganic anti-doodling environment-friendly paint as defined in claim 1 is characterized by comprising the following steps: the method comprises the following steps:
s1: adding water, a defoaming agent, an auxiliary agent, rutile titanium dioxide and a filler into a dispersion cylinder in sequence according to a ratio, uniformly mixing at a rotating speed of 350r/min and 250-;
s2: the slurry obtained in S1 is added with fluorocarbon emulsion, water glass and silica sol solution in sequence at the rotation speed of 550-650r/min, and is mixed evenly to obtain base material;
s3: the base material obtained from S2 is added with functional pigment according to the formula amount at the rotating speed of 750-.
9. The preparation method of the inorganic anti-doodling environment-friendly paint as claimed in claim 8, wherein the preparation temperatures in the steps S1, S2 and S3 are all 15-30 ℃.
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| CN115612325A (en) * | 2022-10-27 | 2023-01-17 | 特灵空调***(中国)有限公司 | Metal inorganic coating and preparation method and application thereof |
| CN116063876A (en) * | 2022-10-11 | 2023-05-05 | 永康市质量技术监测研究院 | Environment-friendly inorganic correction fluid and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116063876A (en) * | 2022-10-11 | 2023-05-05 | 永康市质量技术监测研究院 | Environment-friendly inorganic correction fluid and preparation method thereof |
| CN115612325A (en) * | 2022-10-27 | 2023-01-17 | 特灵空调***(中国)有限公司 | Metal inorganic coating and preparation method and application thereof |
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