CN111253810A - Water-based inorganic floor coating and preparation method thereof - Google Patents
Water-based inorganic floor coating and preparation method thereof Download PDFInfo
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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
- C09D125/00—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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
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- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- 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 relates to the field of coatings, and particularly relates to a water-based inorganic floor coating and a preparation method thereof, wherein the water-based inorganic floor coating comprises the following components in parts by weight: 260 parts of inorganic nano reinforcing agent 240-260 parts, 1.5-2.5 parts of defoaming agent, 90-110 parts of titanium dioxide, 420 parts of filler 380-420 parts, 3-4 parts of cellulose, 175 parts of water 170-175 parts, 1-2 parts of bactericide, 50-70 parts of film-forming emulsion and 1-3 parts of film-forming auxiliary agent; the inorganic nano reinforcing agent is prepared from nano silicon dioxide, a silane coupling agent and organic sepiolite. The water-based inorganic floor coating provided by the invention has high bonding strength of the combination of the cement base surface, does not fall off or peel, can improve the hardness, wear resistance and impact resistance of the cement base surface, and has good water resistance and scrubbing resistance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based inorganic floor coating and a preparation method thereof.
Background
The inorganic coating is a coating which takes inorganic materials as main film forming substances and is widely used in the daily life fields of buildings, paintings and the like; compared with organic coatings, the inorganic coatings mostly use water as a dispersion medium, have less pollution to the environment in the production and use processes, are alkaline, are more suitable for being applied to basic layers of cement, sand lime and the like which are alkaline, can generate chemical reaction with lime in the basic layers to generate calcium silicate crystals, can be integrated with the basic layers, and have excellent adhesion.
In the prior art, patent application publication No. CN107739189A discloses a super wear-resistant, fireproof and flame-retardant mineral floor coating and a preparation method thereof, wherein an inorganic super wear-resistant, fireproof and flame-retardant mineral floor coating comprises the following raw materials in percentage by mass: 1-10% of dispersing agent, 0-5% of cellulose, 0-5% of bentonite, 0-3% of defoaming agent, 0-5% of flatting agent, 0-4% of wetting agent, 1-15% of titanium dioxide, 0-15% of aluminum hydroxide, 0-10% of wollastonite powder, 15-30% of silicon dioxide, 0-5% of fumed silica, 0-40% of nano silicate, 0-5% of thickening agent and the balance of water.
The terrace paint uses nano silicate as a main film forming substance, belongs to alkali metal silicate paint, and can be divided into phosphate paint, silica sol inorganic paint and the like according to the film forming substance except the alkali metal silicate paint; the alkali metal silicate paint is a paint using potassium silicate and sodium silicate as binders, and the film forming mechanism is that sodium silicate or potassium silicate reacts with carbon dioxide in air to form silicic acid sol, and the silicic acid sol is dehydrated to form inorganic silica chain network macromolecules along with the evaporation of water, so that the alkali metal silicate paint has good heat resistance, flame resistance and acid resistance. The phosphate coating is a film-forming substance which is aqueous solution of acid phosphate, forms a net structure through high-temperature baking, has the advantages of high bonding strength, high temperature resistance and good corrosion resistance, but has the defects of high curing temperature and large coating film brittleness. The silica sol coating takes aqueous dispersion of colloidal silica as a film forming substance, and the film forming mechanism is that when the silica sol is dehydrated and evaporated, colloidal molecules are increased, and Si-O-Si three-dimensional network structures are formed among silica particles, so that the silica sol coating has the advantages of hard coating film, strong adhesive force and good water resistance, but the coating has the defect that the coating film is easy to crack.
Thus, current inorganic coatings of a single film-forming material still suffer from several drawbacks.
Disclosure of Invention
Aiming at the defects in the prior art, the first object of the invention is to provide a water-based floor coating which has high bonding strength with a cement base surface, does not fall off or peel, can improve the hardness, wear resistance and impact resistance of the cement base surface, and has the advantages of good water resistance and scrubbing resistance.
The second purpose of the invention is to provide a preparation method of the water-based inorganic floor coating, which has the advantages of simple preparation and easy operation.
In order to achieve the first object, the invention provides the following technical scheme: the water-based inorganic floor coating comprises the following components in parts by weight:
260 parts of inorganic nano reinforcing agent 240-260 parts, 1.5-2.5 parts of defoaming agent, 90-110 parts of titanium dioxide, 420 parts of filler 380-420 parts, 3-4 parts of cellulose, 175 parts of water 170-175 parts, 1-2 parts of bactericide, 50-70 parts of film-forming emulsion and 1-3 parts of film-forming auxiliary agent;
the inorganic nano reinforcing agent is prepared from nano silicon dioxide, a silane coupling agent and organic sepiolite.
By adopting the technical scheme, the sepiolite is fibrous hydrous magnesium silicate and has the characteristics of softening after meeting water and hardening after drying; the sepiolite and the silane coupling agent are adopted to modify the nano-silica, so that the compactness of a net structure can be improved by utilizing the fiber structure of the sepiolite while the silicon dioxide particles form a Si-O-Si three-dimensional net structure, and an organic-inorganic network structure can be formed by matching the inorganic nano reinforcing agent with cellulose, film-forming emulsion and film-forming auxiliary agent, so that the water retention property and the elasticity of a coating film of the coating are improved, the binding force between the coating film and a cement base surface is improved, and the coating film is not easy to fall off and peel; and the inorganic nano reinforcing agent is matched with the titanium dioxide and the filler, so that the hardness, the wear resistance and the impact resistance of the cement base surface can be effectively improved, and the scrubbing resistance of the cement base surface is improved.
Further, the paint comprises the following components in parts by weight: 250 parts of inorganic nano reinforcing agent, 2 parts of defoaming agent, 100 parts of titanium dioxide, 400 parts of filler, 3.5 parts of cellulose, 172 parts of water, 1.5 parts of bactericide, 60 parts of film-forming emulsion and 2 parts of film-forming additive.
By adopting the technical scheme, the bonding strength of the coating prepared according to the proportion and the cement base surface is high, so that the obtained paint film does not fall off or peel, the hardness, the wear resistance and the impact resistance of the cement base surface can be improved, and the coating has the advantages of good water resistance and scrubbing resistance.
① mixing silane coupling agent and 65-95% ethanol solution at a ratio of 1:3, and ultrasonically dispersing for 20-30min to obtain silane hydrolysate;
② taking 100 weight parts of silane hydrolysate, adding 20-30 weight parts of nano silicon dioxide and 3-5 weight parts of organic sepiolite, grinding for 1-2h, reacting for 1-2h at 60-70 ℃, and evaporating the solvent to obtain a condensate;
③ and drying the condensate to obtain the inorganic nanometer reinforcing modifier.
By adopting the technical scheme, the nano-silica is used as the main coating of the inorganic nano-reinforcing agent, the nano-silica is dispersed in the raw materials of the coating and can be used as a film forming substance, and after the nano-silica loses water, a Si-O-Si three-dimensional network structure is formed among the silica particles, so that the hardness, the water resistance and the adhesive force to a cement base can be improved; dispersing a silane coupling agent in an ethanol solution to prepare silane hydrolysate, which is beneficial to the dispersion of nano silicon dioxide and organic sepiolite, modifying the silane hydrolysate by adopting the organic sepiolite, improving the compactness of a net structure by utilizing the fiber structure of the sepiolite, and taking the organic sepiolite as a bridging agent of film-forming emulsion and the nano silicon dioxide, wherein in a coating state, the sepiolite which absorbs water and becomes soft can improve the compatibility of the nano silicon dioxide and the film-forming emulsion, and is beneficial to improving the stability of a system; and after the paint film is hardened, the sepiolite fibers hardened by dehydration can also improve the hardness of the paint film.
Further, the silane coupling agent is one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
By adopting the technical scheme, the chemical name of the silane coupling agent is gamma-aminopropyltriethoxysilane, the chemical name of the silane coupling agent KH560 is gamma-glycidoxypropyltrimethoxysilane, and the chemical name of the silane coupling agent KH570 is gamma- (methacryloyloxy) propyltrimethoxysilane; silane coupling agents KH550, KH560 and KH570 can be used for coupling the film-forming aid and the nano-silica to increase the cohesiveness of the film-forming aid and the nano-silica.
Further, the organic sepiolite is prepared by adopting the following method: a. taking 50 parts by weight of sepiolite powder, adding the sepiolite powder into 300 parts by weight of water, and stirring for 40-60min at the temperature of 50-60 ℃ to obtain sepiolite dispersion liquid;
b. adding 8-10 parts of dioctadecyl dimethyl ammonium bromide into the sepiolite dispersion liquid, stirring for 1-2h, then adding 3-5 parts of stearic acid amide, and stirring for 20-30min to obtain a suspension;
c. centrifuging the suspension at the speed of 5000-6000r/min for 3-5min, and removing the supernatant to obtain a precipitate; drying, crushing and sieving the precipitate to obtain the organic sepiolite.
By adopting the technical scheme, the sepiolite after being modified can improve the dispersibility and the suspension property of the inorganic nano reinforcing agent in water and reduce the layering phenomenon of the coating, and can be used as a coupling agent of inorganic particles and film-forming emulsion so as to improve the compatibility of the sepiolite and the film-forming emulsion of a high polymer material and improve the blending stability of the coating.
Further, the filler is formed by mixing barium sulfate and wollastonite in a weight ratio of 3: 5.
By adopting the technical scheme, the barium sulfate and the wollastonite are adopted as the fillers, so that the production cost can be reduced, the glossiness of the surface of the coating film can be improved, and the flatness of the surface of the coating film can be improved.
Further, the defoaming agent is a silicone defoaming agent.
By adopting the technical scheme, the organic silicon defoaming agent can remove bubbles generated in the stirring process of the coating, and is beneficial to improving the stability of the system.
Further, the cellulose is one of hydroxyethyl cellulose and methyl ethyl hydroxyethyl cellulose or a composite of the hydroxyethyl cellulose and the methyl ethyl hydroxyethyl cellulose.
By adopting the technical scheme, the hydroxyethyl cellulose and the methyl ethyl hydroxyethyl cellulose are used as the non-ionic soluble cellulose ethers, so that the viscosity, the stability and the water retention of the water-based paint can be improved, and the stability of a paint system is modified.
Further, the film-forming emulsion is styrene-acrylic emulsion.
By adopting the technical scheme, the styrene-acrylic emulsion is obtained by emulsion copolymerization of styrene and acrylate monomers, and has the advantages of good adhesive force and good water resistance.
In order to achieve the second object, the invention provides the following technical scheme:
a preparation method of a water-based inorganic floor coating comprises the following steps:
s1, stirring 1/2 of antifoaming agent, cellulose and water in the total amount of inorganic nano reinforcing agent and antifoaming agent for 5-10min at the speed of 500-800r/min according to the proportion to obtain a mixed solution;
s2, adding titanium dioxide and filler into the mixed solution, and stirring for 30-40min at the speed of 1000-3000 r/min; and then adding the bactericide, the film-forming emulsion, the film-forming assistant and the rest of the defoaming agent, and stirring for 30-50min to obtain the water-based inorganic floor coating.
By adopting the technical scheme and the method for preparing the floor coating, the operation is simple and the realization is easy.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. by matching the inorganic nano reinforcing agent with cellulose, film-forming emulsion and film-forming auxiliary agent, an organic-inorganic network structure can be formed so as to improve the water retention property of the coating and the elasticity of a coating film, improve the binding force between the coating and a cement base surface and ensure that the coating film is not easy to fall off and peel; in addition, the inorganic nano reinforcing agent is matched with the titanium dioxide and the filler, so that the hardness, the wear resistance and the impact resistance of a cement base surface can be effectively improved, and the scrubbing resistance of the cement base surface is improved;
2. the inorganic nano reinforcing agent takes nano silicon dioxide as a main raw material, utilizes the characteristic of the colloid film-forming property of the nano silicon dioxide, adopts the organic sepiolite and the silane coupling agent to carry out modification treatment on the nano silicon dioxide, can improve the compactness of a net structure, solves the defect that a silica sol paint film is easy to crack, and is beneficial to improving the mechanical property of the paint film;
3. the sepiolite which absorbs water and becomes soft can improve the compatibility of the nano silicon dioxide and the film-forming emulsion, thereby being beneficial to improving the stability of the system; after the paint film is hardened, the sepiolite fibers hardened by dehydration can also improve the hardness of the paint film; the modified sepiolite can be used as a coupling agent of inorganic particles and film-forming emulsion to improve the compatibility of the sepiolite and the film-forming emulsion of a high polymer material and improve the blending stability of the coating.
Detailed Description
The present invention will be described in further detail below.
Preparation of organic sepiolite powder with a fineness of 325 mesh, which was provided by sepiolite powder jiazhuang whole mineral products ltd, in the following preparation examples; dioctadecyl dimethyl ammonium bromide, Nanjing chemical reagents, Inc.; the stearic acid amide is provided by Hubeixin Rundchemical company, Inc.
Preparation example 1 of organic sepiolite: a. taking 50kg of sepiolite powder, adding the sepiolite powder into 200kg of water, and stirring at the temperature of 50 ℃ at the speed of 2000r/min for 40min to obtain sepiolite dispersion liquid;
b. adding 8kg of dioctadecyl dimethyl ammonium bromide into the sepiolite dispersion liquid, stirring for 1h at the speed of 800r/min, then adding 3kg of stearic acid amide, and stirring for 20min at the speed of 800r/min to obtain a suspension;
c. centrifuging the suspension at 5000r/min for 3min, and removing supernatant to obtain precipitate; drying the precipitate at 90 deg.C for 12h, pulverizing, and sieving with 200 mesh sieve to obtain organic sepiolite.
Preparation example 2 of organic sepiolite: a. taking 50kg of sepiolite powder, adding the sepiolite powder into 250kg of water, and stirring at the temperature of 55 ℃ for 50min at the speed of 2000r/min to obtain sepiolite dispersion liquid;
b. adding 9kg of dioctadecyl dimethyl ammonium bromide into the sepiolite dispersion liquid, stirring for 1.5h at the speed of 800r/min, then adding 4kg of stearic acid amide, and stirring for 25min at the speed of 800r/min to obtain suspension;
c. centrifuging the suspension at 5500r/min for 4min, and removing supernatant to obtain precipitate; drying the precipitate at 90 deg.C for 12h, pulverizing, and sieving with 200 mesh sieve to obtain organic sepiolite.
Preparation example 3 of organic sepiolite: a. taking 50kg of sepiolite powder, adding the sepiolite powder into 300kg of water, and stirring at the temperature of 60 ℃ at the speed of 2000r/min for 60min to obtain sepiolite dispersion liquid;
b. adding 10kg of dioctadecyl dimethyl ammonium bromide into the sepiolite dispersion liquid, stirring for 2h at the speed of 800r/min, then adding 5kg of stearic acid amide, and stirring for 30min at the speed of 800r/min to obtain a suspension;
c. centrifuging the suspension at 6000r/min for 5min, and removing supernatant to obtain precipitate; drying the precipitate at 90 deg.C for 12h, pulverizing, and sieving with 200 mesh sieve to obtain organic sepiolite.
Preparation example 4 of organic sepiolite: the preparation example is different from the preparation example 1 of the organic sepiolite in that the step b comprises the following steps: 10kg of octadecyl trimethyl ammonium bromide was added to the sepiolite dispersion, and the mixture was stirred at a rate of 800r/min for 1 hour to obtain a suspension.
Preparation of inorganic nano reinforcing agent silane coupling agents KH550, KH560 and KH570 in the following preparation examples were all provided by the ancient sea plastic chemical company, guan, dong guan; the nano-silicon dioxide is selected from 2500-mesh nano-silicon dioxide of Tuofang Chenkun chemical building materials Limited.
Preparation example of inorganic nano reinforcing agent 1: ① silane coupling agent and 65% volume fraction ethanol solution are mixed according to the proportion of 1:3, and are subjected to ultrasonic dispersion for 20min under the condition of frequency of 80kHz to obtain silane hydrolysate;
② adding 20kg of nano silicon dioxide and 3kg of organic sepiolite (selected from preparation example 1 of organic sepiolite) into 100 parts of silane hydrolysate, grinding for 1h, reacting at 60 ℃ for 1h, evaporating the solvent ethanol to obtain a solidified substance, and drying ③ the solidified substance at 80 ℃ for 10h to obtain the inorganic nano reinforcing modifier.
① preparation example of inorganic nanometer reinforcing agent, mixing silane coupling agent and 80% volume fraction ethanol solution at a ratio of 1:3, and ultrasonically dispersing at 80kHz for 25min to obtain silane hydrolysate;
② taking 100 parts of silane hydrolysate, adding 25kg of nano silicon dioxide and 4kg of organic sepiolite (selected from preparation example 2 of organic sepiolite), grinding for 1.5h, reacting for 1.5h at 65 ℃, and evaporating solvent ethanol to obtain a condensate;
③ drying the condensate at 80 ℃ for 10h to obtain the inorganic nano reinforcing modifier.
Preparation example 3 of inorganic nano reinforcing agent ① mixing silane coupling agent and 95% volume fraction ethanol solution at a ratio of 1:3, and ultrasonically dispersing for 30min at a frequency of 80kHz to obtain silane hydrolysate;
② taking 100 parts of silane hydrolysate, adding 30kg of nano silicon dioxide and 5kg of organic sepiolite (selected from preparation example 3 of organic sepiolite), grinding for 2h, reacting for 2h at 70 ℃, and evaporating solvent ethanol to obtain a condensate;
③ drying the condensate at 80 ℃ for 10h to obtain the inorganic nano reinforcing modifier.
Preparation example 4 of inorganic nanoenhancer this preparation example differs from preparation example 1 of inorganic nanoenhancer in that no organic sepiolite was added in step ②.
Preparation example 5 of inorganic nanoenhancer: the difference between this preparation example and preparation example 1 of the inorganic nano reinforcing agent is that the organic sepiolite was replaced with the same amount of ordinary sepiolite powder.
Preparation example 6 of inorganic nanoenhancer: the difference between the preparation example and the preparation example 1 of the inorganic nano reinforcing agent is that the organic sepiolite is prepared from the preparation example 4 of the organic sepiolite.
Examples
The defoaming agent in the following preparation examples is selected from RK-7306 defoaming agent provided by Xiamen Rayman chemical technology Co., Ltd; the hydroxyethyl cellulose is selected from 250HBR hydroxyethyl cellulose provided by Astrodon americana; the methyl ethyl hydroxyethyl cellulose is selected from methyl ethyl hydroxyethyl cellulose provided by Acksonobel with model number Bermocoll EBM 8000; the bactericide is selected from 5-chloro-2-methyl-4-isothiazolin-3-one bactericide provided by Beijing Muyu Yuan International science and technology development Co; the film-forming emulsion is selected from TRD-506 styrene-acrylic emulsion provided by Zhengzhou Guangjie chemical Co., Ltd; the film forming aid is selected from propylene glycol ethyl ether.
Example 1: a horizontal inorganic floor coating is prepared by the following method:
s1, taking 250kg of inorganic nano reinforcing agent (selected from preparation example 1 of the inorganic nano reinforcing agent), 1kg of defoaming agent, 3.5kg of hydroxyethyl cellulose and 172kg of water, and stirring at the speed of 650r/min for 8min to obtain a mixed solution;
s2, adding 100kg of titanium dioxide, 150kg of barium sulfate and 250kg of wollastonite into the mixed solution, and stirring at the speed of 2000r/min for 35 min; then adding 1.5kg of bactericide 60kg of film-forming emulsion, 2kg of film-forming auxiliary agent and 1kg of defoamer, and stirring for 30-50min to obtain the water-based inorganic floor coating.
Example 2: a horizontal inorganic floor coating is prepared by the following method:
s1, taking 240kg of inorganic nano reinforcing agent (selected from preparation example 2 of the inorganic nano reinforcing agent), 0.75kg of defoaming agent, 3kg of methyl ethyl hydroxyethyl cellulose and 170kg of water, and stirring at the speed of 500r/min for 5min to obtain a mixed solution;
s2, adding 90kg of titanium dioxide, 142.5kg of barium sulfate and 237.5kg of wollastonite into the mixed solution, and stirring at the speed of 1000r/min for 30 min; then adding 1kg of bactericide, 50kg of film-forming emulsion, 1kg of film-forming auxiliary agent and 0.75kg of defoaming agent, and stirring for 30min to obtain the water-based inorganic floor coating.
Example 3: a horizontal inorganic floor coating is prepared by the following method:
s1, taking 260kg of inorganic nano reinforcing agent (selected from preparation example 3 of the inorganic nano reinforcing agent), 1.25kg of defoaming agent, 4kg of hydroxyethyl cellulose and 175kg of water, and stirring at the speed of 800r/min for 10min to obtain a mixed solution;
s2, adding 110kg of titanium dioxide, 157.5kg of barium sulfate and 262.5kg of wollastonite into the mixed solution, and stirring at the speed of 3000r/min for 40 min; then adding 2kg of bactericide, 70kg of film-forming emulsion, 3kg of film-forming auxiliary agent and 1.25kg of defoaming agent, and stirring for 50min to obtain the water-based inorganic floor coating.
Comparative example
Comparative example 1 using patent application publication No. CN107739189A (super wear-resistant, fire-retardant, and fire-retardant mineral floor coating and preparation method thereof), a floor coating is composed of the following raw materials by mass: 4% of dispersing agent, 2% of cellulose, 2% of bentonite, 3% of defoaming agent, 2% of flatting agent, 3% of wetting agent, 10% of titanium dioxide, 10% of aluminum hydroxide, 10% of wollastonite powder, 10% of silicon dioxide, 2% of fumed silica, 15% of nano silicate, 2% of thickening agent and 25% of water. The dispersing agent is TiloSperse6003, the defoaming agent is NXZ, the leveling agent is BYK333, the wetting agent is OT75, the titanium dioxide is R706, the thickening agent is TT935, the cellulose is B30K, and the bentonite is ATTAGEL 50.
The preparation method of the floor coating comprises the following steps of (1) respectively weighing raw materials according to the mass percentage; (2) starting a dispersing device, sequentially and slowly adding the water, the cellulose, the bentonite, the dispersing agent, the defoaming agent, the flatting agent and the wetting agent, and continuously dispersing for 10min to obtain a crude mixed material; (3) sequentially adding the titanium dioxide, the silicon dioxide, the fumed silica, the wollastonite powder, the aluminum hydroxide and other powder into the obtained crude mixed material, and stirring until the fineness of the mixed material is not more than 40 mu m; (4) adding the nano silicate into the mixture obtained in the step (3), and uniformly dispersing; (5) and (4) adding a thickening agent into the mixture obtained in the step (4) under the stirring state, uniformly dispersing, and filtering to obtain the water-based ink.
Comparative example 2: this comparative example differs from example 1 in that the inorganic nanoreinforcement is replaced with an equal amount of nanosilica.
Comparative example 3: this comparative example is different from example 1 in that the inorganic nano-reinforcing agent is selected from the preparation example 4 of the inorganic nano-reinforcing agent.
Comparative example 4: this comparative example is different from example 1 in that the inorganic nano-reinforcing agent is selected from the preparation example 5 of the inorganic nano-reinforcing agent.
Comparative example 5: this comparative example is different from example 1 in that the inorganic nano-reinforcing agent is selected from the preparation example 6 of the inorganic nano-reinforcing agent.
Performance testing
The coatings prepared in examples 1 to 3 and comparative examples 1 to 5 were tested for their properties in the following manner, and the test results are shown in Table 1.
The thermal storage stability, the low-temperature storage stability, the surface drying time, the scrubbing resistance, the water resistance, the alkali resistance, the temperature change resistance, the stain resistance and the artificial aging resistance are tested according to the method in JG/T26-2002 inorganic building coating for exterior walls;
paint film hardness is according to GB/T6739-2006 color paint and varnish: testing paint film hardness by pencil method;
the wear resistance is tested according to GB/T1768-2006 rotating rubber grinding wheel method for measuring the wear resistance of colored paint and varnish;
the impact resistance is tested by adopting a method of 6.3.10 in standard GB/T22374-2008 according to the impact resistance, 100cm of 500g steel ball has no crack and no stripping in a paint film, and the paint film is I-grade; 1000g of steel ball is 100cm, and the paint film has no crack and no stripping and is II grade;
the adhesion was tested in accordance with GB/T9286-1998 test for the marking of paint and varnish films.
TABLE 1 test Table for Performance of coating materials in examples 1-3 and comparative examples 1-5
According to the data in table 1, the terrace coating prepared by the invention has the advantages of high adhesion, difficult shedding and peeling, high hardness, good wear resistance, good impact resistance and scrub resistance of a paint film, and good storage stability, water resistance, alkali resistance, temperature change resistance, stain resistance and aging resistance.
The inorganic nanoenhancer of comparative example 2 was replaced with an equivalent amount of nanosilica; compared with example 1, the paint in comparative example 2 has obviously reduced washing resistance, wear resistance, impact resistance and adhesion, which shows that the inorganic nano reinforcing agent prepared by the method of the invention can obviously improve the washing resistance, wear resistance, impact resistance and adhesion to a base layer of a paint film.
The inorganic nano reinforcing agent of comparative example 3 was prepared from preparation example 4 of the inorganic nano reinforcing agent, to which sepiolite was not added; the coating of comparative example 3 showed significantly reduced scrub resistance, abrasion resistance, impact resistance and adhesion compared to example 1, indicating that the addition of organic sepiolite resulted in the scrub resistance, abrasion resistance, impact resistance and adhesion to the base layer of the paint film when the inorganic nano-reinforcing agent was prepared.
The inorganic nano reinforcing agent of comparative example 4 was prepared from preparation example 5 of an inorganic nano reinforcing agent in which organic sepiolite was replaced with an equal amount of ordinary sepiolite powder; as can be seen by comparing example 1, comparative example 3 and comparative example 4, the coating in comparative example 4 has significantly lower brushing resistance, abrasion resistance, impact resistance and adhesion than the coating in example 1, but slightly better adhesion than the coating in example 3, which shows that the addition of ordinary sepiolite is advantageous for improving the brushing resistance, abrasion resistance, impact resistance and adhesion to the base layer of the paint film in the preparation of the inorganic nano reinforcing agent, but the improvement effect is lower than that of organic sepiolite on the performance of the paint film.
The inorganic nano-reinforcing agent of comparative example 5 was prepared from preparation example 6 of an inorganic nano-reinforcing agent, in which octadecyl trimethyl ammonium bromide was used instead of dioctadecyl dimethyl ammonium bromide and stearamide; as can be seen by comparing example 1, comparative example 4 and comparative example 5, the brushing resistance, abrasion resistance, impact resistance and adhesion of the coating in comparative example 5 are obviously lower than those of the coating in example 1, but the brushing resistance and abrasion resistance are obviously better than those of the coating in example 3, which shows that the sepiolite modified by the octadecyl trimethyl ammonium bromide can improve the brushing resistance and abrasion resistance of the paint film, but the improvement effect on the impact resistance and adhesion of the paint film is lower than that of the organic sepiolite of the invention on the performance of the paint film.
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 (10)
1. The water-based inorganic floor coating is characterized in that: the paint comprises the following components in parts by weight:
260 parts of inorganic nano reinforcing agent 240-260 parts, 1.5-2.5 parts of defoaming agent, 90-110 parts of titanium dioxide, 420 parts of filler 380-420 parts, 3-4 parts of cellulose, 175 parts of water 170-175 parts, 1-2 parts of bactericide, 50-70 parts of film-forming emulsion and 1-3 parts of film-forming auxiliary agent;
the inorganic nano reinforcing agent is prepared from nano silicon dioxide, a silane coupling agent and organic sepiolite.
2. The aqueous inorganic floor coating of claim 1, characterized in that: the paint comprises the following components in parts by weight: 250 parts of inorganic nano reinforcing agent, 2 parts of defoaming agent, 100 parts of titanium dioxide, 400 parts of filler, 3.5 parts of cellulose, 172 parts of water, 1.5 parts of bactericide, 60 parts of film-forming emulsion and 2 parts of film-forming additive.
3. The water-based inorganic floor coating of claim 1, wherein the inorganic nano reinforcing agent is prepared by ① mixing a silane coupling agent and an ethanol solution with a volume fraction of 65-95% in a ratio of 1:3, and performing ultrasonic dispersion for 20-30min to obtain a silane hydrolysate;
② taking 100 weight parts of silane hydrolysate, adding 20-30 weight parts of nano silicon dioxide and 3-5 weight parts of organic sepiolite, grinding for 1-2h, reacting for 1-2h at 60-70 ℃, and evaporating the solvent to obtain a condensate;
③ and drying the condensate to obtain the inorganic nanometer reinforcing modifier.
4. The aqueous inorganic floor coating of claim 1, characterized in that: the silane coupling agent is one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
5. The aqueous inorganic floor coating of claim 1, characterized in that: the organic sepiolite is prepared by the following method: a. taking 50 parts by weight of sepiolite powder, adding the sepiolite powder into 300 parts by weight of water, and stirring for 40-60min at the temperature of 50-60 ℃ to obtain sepiolite dispersion liquid;
b. adding 8-10 parts of dioctadecyl dimethyl ammonium bromide into the sepiolite dispersion liquid, stirring for 1-2h, then adding 3-5 parts of stearic acid amide, and stirring for 20-30min to obtain a suspension;
c. centrifuging the suspension at the speed of 5000-6000r/min for 3-5min, and removing the supernatant to obtain a precipitate; drying, crushing and sieving the precipitate to obtain the organic sepiolite.
6. The aqueous inorganic floor coating of claim 1, characterized in that: the filler is formed by mixing barium sulfate and wollastonite in a weight ratio of 3: 5.
7. The aqueous inorganic floor coating of claim 1, characterized in that: the defoaming agent is an organic silicon defoaming agent.
8. The aqueous inorganic floor coating of claim 1, characterized in that: the cellulose is one of hydroxyethyl cellulose and methyl ethyl hydroxyethyl cellulose or the compound of the hydroxyethyl cellulose and the methyl ethyl hydroxyethyl cellulose.
9. The aqueous inorganic floor coating of claim 1, characterized in that: the film-forming emulsion is styrene-acrylic emulsion.
10. A method of making the aqueous inorganic floor coating of any of claims 1-9, characterized in that: the method comprises the following steps:
s1, stirring 1/2 of antifoaming agent, cellulose and water in the total amount of inorganic nano reinforcing agent and antifoaming agent for 5-10min at the speed of 500-800r/min according to the proportion to obtain a mixed solution;
s2, adding titanium dioxide and filler into the mixed solution, and stirring for 30-40min at the speed of 1000-3000 r/min; and then adding the bactericide, the film-forming emulsion, the film-forming assistant and the rest of the defoaming agent, and stirring for 30-50min to obtain the water-based inorganic floor coating.
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| CN113372741A (en) * | 2021-07-22 | 2021-09-10 | 四川布瑞世科技有限公司 | Novel inorganic coating and preparation method thereof |
| CN113913035A (en) * | 2021-08-24 | 2022-01-11 | 杭州盛得佳实业有限公司 | Inorganic floor reinforcing paint and production process thereof |
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