CN110182833B - Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof - Google Patents
Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof Download PDFInfo
- Publication number
- CN110182833B CN110182833B CN201910477010.7A CN201910477010A CN110182833B CN 110182833 B CN110182833 B CN 110182833B CN 201910477010 A CN201910477010 A CN 201910477010A CN 110182833 B CN110182833 B CN 110182833B
- Authority
- CN
- China
- Prior art keywords
- hydrotalcite
- cross
- parts
- water
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
- C01F7/784—Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions
- C01F7/785—Hydrotalcite
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/006—Compounds containing, besides zinc, two ore more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- 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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- C—CHEMISTRY; METALLURGY
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/10—Solid density
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Geology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a preparation method of cross-linked hydrotalcite-like compound, a water-based paint and a preparation method thereof, belonging to the technical field of paints. The preparation method of the cross-linked hydrotalcite-like compound provided by the invention comprises the following steps: mixing an aluminum source, a cross-linking agent and water, adjusting the pH value of the obtained mixed system to 5-9, and then carrying out chemical reaction to obtain slurry; and mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and crystallizing to obtain the cross-linked hydrotalcite-like compound. According to the invention, an aluminum source reacts with sodium hydroxide under weak acid or weak base conditions to obtain aluminum hydroxide, a cross-linking agent reacts with hydroxyl on the surface of the aluminum hydroxide, and simultaneously, the cross-linking agent and hydroxyl on different hydrotalcite sheets are subjected to cross-linking action, so that the hydrotalcite sheets are orderly stacked and spliced and crystallized under strong base conditions, and the prepared cross-linked hydrotalcite is compact, large in interlayer pore space, large in specific heat capacity and good in heat insulation performance, and can remarkably improve the heat insulation performance and adhesive force of the coating.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a preparation method of a cross-linked hydrotalcite-like compound, a water-based coating and a preparation method thereof.
Background
The hydrotalcite-like compound is a bimetallic hydroxide with a layered structure, is alkaline, has adjustable composition and structure, has the performances of infrared absorption, ultraviolet obstruction and the like, and can enable the coating to have the functions of corrosion resistance, aging resistance, weather resistance, certain heat insulation and the like by being added into the coating.
However, the conventional hydrotalcite-like compounds have the following disadvantages: the hydrotalcite-like compound has small particles, thin layers, poor covering power and weak light reflection; secondly, the hydrotalcite-like sheets are stacked disorderly and difficultly play a role of heat transfer blocking by interlayer gaps; and the hydrotalcite-like compound has high surface hydroxyl group content, large surface energy, poor compatibility with resin, poor adhesive force and the like. Therefore, when the traditional hydrotalcite-like compound is applied to the heat-insulating coating, the defects of non-ideal heat-insulating effect, poor adhesion and the like exist, so that the phenomena of bubbling, falling and the like of a coating film are easy to occur, and the popularization and the application of the hydrotalcite-like compound in the heat-insulating coating are restricted.
Chinese patent CN103318933A discloses a method for preparing surface modified hydrotalcite compound by adopting brucite, all raw materials are directly and simultaneously added without pretreatment, so that hydrotalcite synthesis and surface modification are completed in one step; although the method obviously reduces the production cost of the surface modified hydrotalcite compound, simplifies the production process and shortens the production period, the modified hydrotalcite prepared by the method only changes the hydrophilicity and hydrophobicity (changing hydrophilicity into hydrophobicity) of the hydrotalcite surface, thereby preventing crystal grain agglomeration and better dispersing hydrotalcite lamella, but the obtained hydrotalcite has small particle size, looseness and poor heat insulation performance.
Disclosure of Invention
The invention aims to provide a preparation method of cross-linked hydrotalcite-like compound, a water-based coating and a preparation method thereof.
The water-based paint provided by the invention has the advantages of good heat insulation performance, strong adhesive force, long service life, safety and environmental protection; the preparation method is simple to operate and suitable for industrial production.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of cross-linked hydrotalcite-like compound, which comprises the following steps:
mixing an aluminum source, a cross-linking agent and water, adjusting the pH value of the obtained mixed system to 5-9, and then carrying out chemical reaction to obtain slurry;
and mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and crystallizing to obtain the cross-linked hydrotalcite-like compound.
Preferably, the aluminum source comprises one or more of aluminum nitrate, aluminum sulfate, aluminum chloride, sodium metaaluminate, aluminum hydroxide and aluminum oxide;
the cross-linking agent comprises one or more of a silane coupling agent, an acrylic polymer and an acrylic copolymer;
the divalent metal ion source comprises a magnesium compound and/or a zinc compound;
the source of anions comprises a soluble carbonate and/or a soluble bicarbonate.
Preferably, the molar ratio of the aluminum source, the crosslinking agent, the divalent metal ion source and the anion source is 1 (0.005-0.2): 1.5-4): 0.3-0.8.
Preferably, the temperature of the chemical reaction is 70-100 ℃, and the time is 2-8 h.
Preferably, the crystallization temperature is 130-190 ℃ and the crystallization time is 12-20 h.
The invention also provides a water-based paint which comprises the cross-linked hydrotalcite-like compound prepared by the preparation method of the technical scheme.
Preferably, the water-based paint is prepared from the following components in parts by weight:
25-40 parts of acrylic resin;
15-30 parts of cross-linked hydrotalcite-like compound;
15-30 parts of alkyd resin;
5-15 parts of titanium dioxide;
2-10 parts of barium sulfate;
0.1-2 parts of a wetting agent;
0.1-2 parts of a dispersing agent;
0.1-2 parts of a defoaming agent;
0.1-2 parts of a leveling agent;
0.1-2 parts of a film-forming assistant;
20-40 parts of water.
Preferably, the dispersant comprises a nonionic surfactant.
The invention also provides a preparation method of the water-based paint in the technical scheme, which comprises the following steps:
mixing and grinding the cross-linked hydrotalcite-like compound, titanium dioxide and barium sulfate to obtain mixed powder;
mixing the mixed powder with acrylic resin, part of water, a wetting agent and a dispersing agent to obtain first slurry;
mixing the first slurry with alkyd resin to obtain a second slurry;
and mixing the second slurry, the film forming auxiliary agent, the defoaming agent, the flatting agent and the residual water to obtain the water-based paint.
Preferably, the particle size of the mixed powder is 0.1-15 μm;
the part of water accounts for 40-70 wt% of the total amount of water.
The invention provides a preparation method of cross-linked hydrotalcite-like compound, which comprises the following steps: mixing an aluminum source, a cross-linking agent and water, adjusting the pH value of the obtained mixed system to 5-9, and then carrying out chemical reaction to obtain slurry; and mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and crystallizing to obtain the cross-linked hydrotalcite-like compound. The cross-linking agent adopted by the invention can simultaneously generate cross-linking action with hydroxyl groups on different hydrotalcite sheets under weak acid and weak base conditions, so that the hydrotalcite sheets are orderly stacked and spliced and are easier to generate and crystallize under strong base conditions, and the obtained hydrotalcite-like compound has large particles, high compactness, opacity and strong covering power, can obviously improve the reflectivity of a coating film, reflects most of heat and has good heat insulation performance; active groups in the cross-linking agent which is not cross-linked on the surface of the cross-linked hydrotalcite can be further condensed with active groups of acrylic resin, alkyd resin and a coating substrate, and the compatibility of the cross-linked hydrotalcite with the acrylic resin and the alkyd resin can be obviously improved. Moreover, the cross-linked hydrotalcite-like compound prepared by the method has large interlayer gaps, and can effectively reduce the heat transfer speed; the cross-linked hydrotalcite-like interlayer crystal water has larger specific heat capacity, and the heating rate of the coating can be greatly reduced; the acrylic resin has the infrared blocking property, can block the heat transfer, has good heat insulation performance, and has good compatibility with acrylic resin and alkyd resin.
The invention also provides a water-based paint, wherein the cross-linked hydrotalcite-like compound has the advantages of compactness, opaqueness and strong covering power, can obviously improve the reflectivity of a coating film and reflects most of heat; the cross-linked hydrotalcite-like compound has infrared blocking property and can block heat transfer; the interlayer gaps of the cross-linked hydrotalcite-like compound can effectively reduce the heat transfer speed; the cross-linked hydrotalcite-like interlayer crystal water has larger specific heat capacity, greatly reduces the heating rate of a coating film, and further obviously improves the heat insulation performance of the coating. Meanwhile, active groups of the cross-linking agent which are not cross-linked on the surface of the cross-linked hydrotalcite can be further condensed with active groups contained in acrylic resin, alkyd resin and a substrate coated with the coating, so that the compatibility of the cross-linked hydrotalcite and the resin and the adhesive force of the coating are obviously improved, the problems of bubbling, falling off, skin formation and the like of the coating in the using process are avoided, and the service life is long. In addition, the water-based paint provided by the invention takes water as a dispersing agent, so that the discharge of VOC is effectively reduced, the green chemical concept is met, and the water-based paint is safe and environment-friendly.
The preparation method of the water-based paint provided by the invention is simple to operate and suitable for large-scale production.
Drawings
FIG. 1 is an XRD pattern of hydrotalcite and crosslinked hydrotalcite-like compound, wherein A represents comparative example 1 and B represents example 1;
FIG. 2 is an SEM photograph of hydrotalcite and crosslinked hydrotalcite-like compound, wherein A represents comparative example 1 and B represents example 1;
FIG. 3 is a graph showing a comparison of the diffuse reflectance of different coated sheets, wherein A represents a blank, B represents comparative example 2, C represents example 4, and D represents example 5;
fig. 4 is a graph comparing the thermal insulation performance of different coatings, wherein a represents a blank panel, B represents comparative example 2, C represents example 4, and D represents example 5.
Detailed Description
The invention provides a preparation method of cross-linked hydrotalcite-like compound, which comprises the following steps:
mixing an aluminum source, a cross-linking agent and water, adjusting the pH value of the obtained mixed system to 5-9, and then carrying out chemical reaction to obtain slurry;
and mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and crystallizing to obtain the cross-linked hydrotalcite-like compound.
In the present invention, all the raw material components are commercially available products well known to those skilled in the art unless otherwise specified.
According to the invention, an aluminum source, a cross-linking agent and water are mixed, the pH value of the obtained mixed system is adjusted to 5-9, and then a chemical reaction is carried out, so as to obtain slurry. In the invention, the alkali used for adjusting the pH value of the obtained mixed system to 5-9 preferably comprises sodium hydroxide solid or sodium hydroxide solution. In the present invention, the type of the chemical reaction is related to the kind of the cross-linking agent, and the chemical reaction occurs differently according to the kind of the cross-linking agent, and the chemical reaction includes hydrolysis and self-condensation of the cross-linking agent (such as a silane coupling agent); reacting an aluminum source with sodium hydroxide to generate aluminum hydroxide; the cross-linking agent reacts with the hydroxyl groups of the aluminum hydroxide; hydrolysis of the crosslinking agent, reaction of the product of self-condensation with hydroxyl groups of aluminum hydroxide, and the like.
Under the condition that the pH value is 5-9, the aluminum source and sodium hydroxide can be guaranteed to react to obtain aluminum hydroxide, the crosslinking reaction between the crosslinking agent and different hydrotalcite laminas is mainly the reaction between carboxyl and hydroxyl in the crosslinking agent and hydroxyl on the surfaces of hydrotalcite, the activity of hydroxyl on the surfaces of hydrotalcite is a main factor for success of crosslinking, and the crosslinking agent and the hydroxyl on the surfaces of aluminum hydroxide are easy to react under the conditions of weak acid and weak alkalinity; if the pH value is too large, aluminum hydroxide can be dissolved and cannot react with the cross-linking agent, the activity of hydroxyl on the surface of a hydrotalcite-generated rear laminate is obviously reduced, the cross-linking agent cannot react with hydroxyl on different laminates at the same time, and the cross-linked hydrotalcite-like compound cannot be prepared.
In the present invention, the aluminum source preferably comprises one or more of aluminum nitrate, aluminum sulfate, aluminum chloride, sodium metaaluminate, aluminum hydroxide and aluminum oxide, more preferably comprises aluminum nitrate, aluminum sulfate, aluminum chloride, sodium metaaluminate, aluminum hydroxide or aluminum oxide, and most preferably comprises aluminum nitrate, aluminum chloride or aluminum hydroxide.
In the present invention, the crosslinking agent preferably includes one or more of a silane coupling agent, an acrylic polymer and an acrylic copolymer, more preferably includes a silane coupling agent, an acrylic polymer or an acrylic copolymer, and most preferably a silane coupling agent. In the present invention, the silane coupling agent preferably includes tetraethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, methyltriethoxysilane, methyltrimethoxysilane, or propyltriethoxysilane; the acrylic polymer preferably comprises sodium polyacrylate or sodium polymethacrylate; the acrylic copolymer preferably includes acrylic acid-maleic acid copolymer, acrylic acid-maleic anhydride copolymer, acrylic acid-butyl acrylate copolymer, acrylic acid-ethyl acrylate copolymer. The cross-linking agent adopted by the invention can simultaneously generate cross-linking action with hydroxyl groups on different hydrotalcite layers, so that the hydrotalcite layers are orderly stacked and spliced, and the obtained cross-linked hydrotalcite-like compound is compact, non-transparent and strong in covering power, and can obviously improve the reflectivity of a coating film and improve the heat insulation effect of the coating; meanwhile, the silicon hydroxyl which is not crosslinked and positioned on the surface of the crosslinked hydrotalcite-like compound can be further condensed with active groups of the resin and the substrate, so that the compatibility of the crosslinked hydrotalcite-like compound and the resin and the adhesive force of the coating are obviously improved, the problems of bubbling, falling, skin-forming and the like of the coating in the use process are avoided, and the service life of the coating is prolonged.
In the present invention, the mixing of the aluminum source, the crosslinking agent and water is preferably performed under stirring conditions; the stirring speed and time are not particularly limited, and the purpose of uniform mixing is achieved, and specifically, the stirring speed is preferably 200-800 rpm, and more preferably 230-750 rpm; the stirring time is preferably 1-30 min, and more preferably 5-20 min. In the invention, the mixing temperature is preferably 70-100 ℃, and more preferably 80-90 ℃.
In the invention, the concentration of the sodium hydroxide solution is preferably 2.5-4.0 mol/L, and more preferably 2.6-3.5 mol/L. In the present invention, the chemical reaction is preferably carried out under stirring conditions, and the stirring speed of the chemical reaction is preferably the same as the stirring speed at the time of mixing. In the invention, the temperature of the chemical reaction is preferably 70-100 ℃, and more preferably 80-90 ℃; the time of the chemical reaction is preferably 2-8 h, and more preferably 3-6 h.
After obtaining the slurry, mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and then crystallizing to obtain the cross-linked hydrotalcite-like compound. In the invention, the slurry and the divalent metal ion source generate hydrotalcite-like crystal nuclei under a strong alkali condition (pH value is 10-13), and the hydrotalcite crystal nuclei are further crystallized to obtain the cross-linked hydrotalcite-like compound. In the invention, the hydrotalcite-like compound is easier to generate and crystallize under the strong alkali condition, crystal nuclei are difficult to form under the lower pH condition, the crystal growth speed is slow, and the hydrotalcite with better crystallinity can be obtained only by long-time crystallization. . In the invention, the divalent metal ion source comprises one or more of a magnesium compound, a zinc compound and an anion source; wherein, the magnesium compound preferably comprises one or more of magnesium chloride, magnesium nitrate, magnesium sulfate, magnesium hydroxide and magnesium oxide; the zinc compound preferably comprises one or more of zinc chloride, zinc nitrate, zinc sulfate, zinc hydroxide and zinc oxide; the magnesium compound and the zinc compound function to provide the metal elements required for crosslinking the hydrotalcite-like compound. In the present invention, the anion source preferably comprises a soluble carbonate and/or a soluble bicarbonate, more preferably one or more of sodium carbonate, potassium carbonate, ammonium carbonate, sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate, most preferably sodium carbonate, potassium carbonate or ammonium carbonate, which provides interlayer anions necessary for crosslinking the hydrotalcite-like compound, and also serves to adjust the pH.
In the present invention, the molar ratio of the aluminum source, the crosslinking agent, the divalent metal ion source and the anion source is preferably 1 (0.005-0.2): (1.5-4): 0.3-0.8), more preferably 1 (0.005-0.15): 2-4): 0.4-0.7, and most preferably 1 (0.005-0.15): 2-3.7): 0.4-0.6. In the present invention, the anion source is preferably used in an amount based on the amount of anions. The amount of water used in the present invention is not particularly limited, and may be the amount of water well known in the art, specifically, the amount of aluminum source: the dosage ratio of water is 1mol (800-2500) mL. The invention controls the raw material dosage within the range, is beneficial to improving the crosslinking degree among hydrotalcite-like layers, and further improves the performance of the crosslinked hydrotalcite-like.
In the invention, the mixing of the slurry, the divalent metal ion source and the anion source is preferably carried out under stirring conditions, and the stirring speed is preferably 200 to 800rpm, more preferably 230 to 750 rpm; the stirring time is preferably 1-30 min, and more preferably 5-20 min. In the invention, the pH value of the obtained mixed material is adjusted to 10-13, preferably to 11-12. In the present invention, the base used for adjusting the pH preferably comprises sodium hydroxide solid or sodium hydroxide solution; in the invention, the concentration of the sodium hydroxide solution is preferably 2.5-4.0 mol/L, and more preferably 2.6-3.5 mol/L. In the invention, the crystallization temperature is preferably 130-190 ℃, and more preferably 140-180 ℃; the crystallization time is preferably 12-20 hours, and more preferably 14-18 hours. In the invention, the crystallization conditions are controlled, so that the growth of hydrotalcite crystals can be ensured to be more complete, and the crystallinity of hydrotalcite is improved.
In the present invention, the cooling preferably further comprises cooling the obtained system, separating solid from liquid, and then drying and pulverizing the obtained filter cake to obtain the crosslinked hydrotalcite-like compound. The cooling mode and the cooling rate of the present invention are not particularly limited, and those known in the art may be used. The solid-liquid separation method of the present invention is not particularly limited, and a solid-liquid separation method known in the art, specifically, filtration, may be employed. In the invention, the drying temperature is preferably 80-150 ℃, and more preferably 100-120 ℃; the drying time is preferably 4-16 h, and more preferably 5-12 h. In the present invention, the particle size of the crushed crosslinked hydrotalcite-like compound is preferably 3 to 15 μm.
The invention also provides a water-based paint which comprises the cross-linked hydrotalcite-like compound prepared by the preparation method of the technical scheme.
In the invention, the water-based paint is preferably prepared from the following components in parts by weight: 25-40 parts of acrylic resin; 15-30 parts of alkyd resin; 15-30 parts of cross-linked hydrotalcite-like compound; 5-15 parts of titanium dioxide; 2-10 parts of barium sulfate; 0.1-2 parts of a wetting agent; 0.1-2 parts of a dispersing agent; 0.1-2 parts of a defoaming agent; 0.1-2 parts of a leveling agent; 0.1-2 parts of a film-forming assistant; 20-40 parts of water.
In the invention, the raw materials for preparing the water-based paint comprise 25-40 parts by weight of acrylic resin, preferably 30-40 parts by weight. In the present invention, the acrylic resin preferably includes a hydroxy acrylic resin, and more preferably includes an aqueous hydroxy acrylic resin.
In the invention, the raw materials for preparing the water-based paint comprise 15-30 parts of alkyd resin, preferably 20-30 parts of alkyd resin, and more preferably 20-25 parts of acrylic resin by weight. After the alkyd resin is cured into a film, the alkyd resin has the advantages of luster, toughness, strong adhesive force, good wear resistance, weather resistance, insulativity and the like, and the adhesive force and the service life of the coating are improved.
In the invention, the raw materials for preparing the water-based paint comprise 15-30 parts, preferably 15-25 parts and more preferably 20-25 parts of cross-linked hydrotalcite-like compound by weight of the acrylic resin. In the invention, the surface of the cross-linked hydrotalcite-like compound contains active groups which do not generate cross-linking reaction, such as silicon hydroxyl, and can be condensed with active groups contained in acrylic resin and alkyd resin, so that the compatibility of the cross-linked hydrotalcite-like compound and resin and the adhesive force of the coating are obviously improved, the problems of bubbling, falling off, skinning and the like cannot be generated in the use process of the coating, and the service life is prolonged.
In the invention, the raw materials for preparing the water-based paint comprise 5-15 parts of titanium dioxide, preferably 6-13 parts of titanium dioxide, and more preferably 8-12 parts of acrylic resin by weight. In the invention, the titanium dioxide has better ultraviolet shielding effect and strong adhesive force, and can improve the adhesive force and the heat insulation performance of the coating and prolong the service life under the combined action of the titanium dioxide and other components.
In the invention, the raw materials for preparing the water-based paint comprise 2-10 parts of barium sulfate, preferably 3-9 parts of barium sulfate, and more preferably 4-8 parts of barium sulfate based on the weight parts of the acrylic resin. In the invention, the barium sulfate has low oil absorption, high density, granular or spherical structure and good filling performance, and can improve the coverage rate of the coating and the strength of the coating by synergistic effect with other components.
In the invention, the raw materials for preparing the water-based paint comprise 0.1-2 parts of wetting agent, preferably 0.5-2 parts, and more preferably 0.5-1.5 parts by weight of acrylic resin. The wetting agent of the present invention is not particularly limited, and any wetting agent known in the art may be used, specifically, PE-100, TRITON wetting agent X-405, SN-5040 or SN-5027, which are German Kenin. In the invention, the wetting agent and other components act together to change the surface tension and permeability of the coating, so that the substrate can be wetted better and the adhesive force of the coating is improved; meanwhile, the paint can also play roles in assisting dispersion and assisting dust prevention, and avoids paint layering.
In the invention, the raw materials for preparing the water-based paint comprise 0.1-2 parts of dispersant, preferably 0.5-2 parts, and more preferably 0.5-1.5 parts by weight of acrylic resin. In the present invention, the dispersant preferably includes a nonionic surfactant, and more preferably includes SURFYNOL 440, Dow CF-10, SN-5040, SN-5027, ByK-191, Germany, or ByK-2010.
In the invention, the raw materials for preparing the water-based paint comprise 0.1-2 parts of defoaming agent, preferably 0.5-2 parts, and more preferably 0.5-1.5 parts by weight of acrylic resin. The defoaming agent of the present invention is not particularly limited, and may be any known defoaming agent known in the art, specifically, Jitian J0404, Mooneng-2311, Switzerland ryan C740, or Germany Basff 2190. In the invention, the defoaming agent can eliminate foams generated in the production and coating processes of the coating, and is beneficial to improving the smoothness of a coating film.
In the invention, the raw materials for preparing the water-based paint comprise 0.1-2 parts of flatting agent, preferably 0.5-2 parts, and more preferably 0.5-1.5 parts by weight of acrylic resin. In the present invention, the leveling agent is preferably Rohm-2020, TEGO450 or BYK-346. In the invention, the leveling agent can promote the coating to form a flat, smooth and uniform coating film in the drying film-forming process, and is beneficial to reducing the surface tension of the coating film and improving the wetting capacity of the coating substrate material.
In the invention, the raw materials for preparing the water-based paint comprise 0.1-2 parts of film-forming additive, preferably 0.5-2 parts, and more preferably 0.5-1.5 parts by weight of acrylic resin. The film-forming assistant of the present invention is not particularly limited, and any film-forming assistant known in the art may be used, and specifically, propylene glycol phenyl ether, ester alcohol dodecyl, dipropylene glycol butyl ether or tripropylene glycol butyl ether may be used. In the invention, the titanium dioxide and the barium sulfate pigment and filler can form a stable complex with the pigment and filler under the action of the film forming additive, so that the heat insulation effect and the adhesive force of the coating are improved.
In the invention, the raw materials for preparing the water-based paint comprise, by weight, 20-40 parts of water, more preferably 25-40 parts of water, and even more preferably 25-35 parts of water. In the present invention, the water is preferably deionized water. The invention takes water as a dispersing medium, effectively reduces the discharge of VOC compared with other organic solvent dispersing media, accords with the concept of green chemistry, and is safe and environment-friendly.
The invention also provides a preparation method of the water-based paint in the technical scheme, which comprises the following steps:
mixing the cross-linked hydrotalcite-like compound, titanium dioxide and barium sulfate to obtain mixed powder;
mixing the mixed powder with water-based hydroxyl acrylic resin, part of water, a wetting agent and a dispersing agent to obtain first slurry;
mixing the first slurry with alkyd resin to obtain a second slurry;
and mixing the second slurry, the film forming auxiliary agent, the defoaming agent, the flatting agent and the residual water to obtain the water-based paint.
The invention mixes the crosslinking hydrotalcite-like compound, titanium dioxide and barium sulfate to obtain mixed powder. In the invention, the mixing is preferably carried out under the condition of stirring, and the stirring speed is preferably 1800-2400 rpm, more preferably 2100-2300 rpm; the stirring time is not specially limited, and the materials can be uniformly mixed. In the present invention, the particle size of the ground powder mixture is preferably 15 μm or less. The invention mixes the cross-linking hydrotalcite, titanium dioxide and barium sulfate filler and then grinds the mixture to proper fineness, which is beneficial to the uniform dispersion of powder in resin, and simultaneously can save the slurry grinding process and simplify the operation steps.
After the mixed powder is obtained, the mixed powder is mixed with the water-based hydroxyl acrylic resin, part of water, the wetting agent and the dispersing agent to obtain first slurry. In the invention, the mixing is preferably carried out under the condition of stirring, and the stirring speed is preferably 400-800 rpm, more preferably 550-650 rpm; the stirring time is preferably 10-120 min, and more preferably 20-90 min. In the present invention, the portion of water preferably accounts for 40 to 70 wt%, more preferably 45 to 65 wt%, and most preferably 50 to 65 wt% of the total amount of water.
After the first slurry is obtained, the first slurry is mixed with alkyd resin to obtain a second slurry. In the invention, the mixing is preferably carried out under the condition of stirring, and the stirring speed is preferably 1900-2500 rpm, more preferably 2100-2400 rpm; the stirring time is preferably 20-150 min, and more preferably 30-120 min.
After the second slurry is obtained, the second slurry, the film forming assistant, the defoaming agent, the leveling agent and the residual water are mixed to obtain the water-based paint.
In the present invention, the residual water preferably accounts for 30 to 60 wt%, more preferably 35 to 45 wt% of the total amount of water. In the present invention, the remaining water preferably corresponds to the portion of water, i.e. the total amount of the portion of water and the remaining water is preferably 100%. The speed and time of mixing are not particularly limited in the invention, and the materials can be uniformly mixed by adopting a mixing mode well known in the field.
In the invention, the cross-linked hydrotalcite-like compound has certain hydrophobicity, the titanium dioxide and the barium sulfate have certain hydrophilicity, and the wetting agent and the dispersing agent are added to fully wet the cross-linked hydrotalcite-like compound, so that the viscosity of the first slurry can be reduced, and the dispersion of the first slurry in resin is facilitated. Carboxyl in the acrylic resin can react with the active groups which are not crosslinked in the crosslinked hydrotalcite-like compound, so that the compatibility of the crosslinked hydrotalcite-like compound and the resin is improved. Mixing the obtained first slurry with alkyd resin can improve the fullness, gloss, hardness, solvent resistance, weather resistance and yellowing resistance of the coating. The film-forming assistant has larger cohesiveness to the emulsion, and needs to be added after the crosslinking hydrotalcite-like compound, the titanium dioxide and the barium sulfate are fully dispersed, otherwise, the dispersion of the titanium dioxide and barium sulfate mixed powder is influenced. The defoaming agent can effectively eliminate foam generated by rapid stirring in the pigment and filler dispersing process, and simultaneously inhibit foam generated by the subsequently added leveling agent. The leveling agent can effectively reduce the surface tension of the coating, improve the permeability of the coating, increase the coating property and ensure uniform film coating, but the leveling agent consists of a surfactant and is easy to generate a large amount of foam, so the leveling agent can be added after the pigment and the filler are fully dispersed, and the foam is prevented from being generated by rapid stirring. By controlling the charging sequence, the obtained coating has good heat-insulating property and strong adhesive force, does not have the problems of bubbling, falling off and skin formation in the using process, and has long service life; in addition, the coating disclosed by the invention takes water as a dispersion medium, so that the emission of VOC is effectively reduced, the green chemical concept is met, and the coating is safe and environment-friendly.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
187.6g of aluminum nitrate, 13.6g of ethyltriethoxysilane and 1000mL of deionized water are fully mixed at 80 ℃, the pH value is adjusted to 9.0 by sodium hydroxide, and stirring reflux is carried out for 3 hours to obtain slurry;
and (2) fully and uniformly mixing the slurry, 256.4g of magnesium nitrate and 31.8g of sodium carbonate, adjusting the pH value to 11 by using sodium hydroxide, crystallizing for 14 hours at 160 ℃, cooling and filtering to obtain a filter cake, drying the obtained filter cake for 10 hours at 120 ℃, and then crushing to obtain the cross-linked hydrotalcite-like compound.
Example 2
187.6g of aluminum nitrate, 10.2g of octyl triethoxysilane and 1000mL of deionized water are fully mixed at 80 ℃, the pH value is adjusted to 8.5 by sodium hydroxide, and stirring reflux is carried out for 5 hours to obtain slurry;
and (2) fully and uniformly mixing the slurry, 205.1g of magnesium nitrate, 59.5g of zinc nitrate and 25.2g of sodium carbonate, adjusting the pH value to 12 by using sodium hydroxide, crystallizing for 18 hours at the temperature of 140 ℃, cooling and filtering to obtain a filter cake, drying the obtained filter cake for 10 hours at the temperature of 120 ℃, and then crushing to obtain the cross-linked hydrotalcite-like compound.
Example 3
Fully mixing 39.0 parts of aluminum hydroxide, 6.8 parts of octyl trimethoxy silane and 1000mL of deionized water at 90 ℃, adjusting the pH value to 8.0 by using sodium hydroxide, and stirring and refluxing for 6 hours to obtain slurry;
and (2) fully and uniformly mixing the slurry, 40.3g of magnesium oxide and 31.8g of sodium carbonate, regulating the pH value to 11 by using sodium hydroxide, crystallizing for 15 hours at 180 ℃, cooling and filtering to obtain a filter cake, drying the obtained filter cake for 10 hours at 120 ℃, and then crushing to obtain the cross-linked hydrotalcite-like compound.
Comparative example 1
187.6g of aluminum nitrate and 1000mL of deionized water are fully mixed at 80 ℃, the pH value is adjusted to 9.0 by sodium hydroxide, and stirring reflux is carried out for 3 hours to obtain slurry;
and fully and uniformly mixing the slurry, 256.4g of magnesium nitrate and 31.8g of sodium carbonate, adjusting the pH value to 11 by using sodium hydroxide, crystallizing for 14 hours at 160 ℃, cooling, filtering to obtain a filter cake, drying the obtained filter cake for 10 hours at 120 ℃, and then crushing to obtain the hydrotalcite-like compound.
FIG. 1 is an XRD pattern of hydrotalcite-like compound and crosslinked hydrotalcite-like compound, wherein A represents comparative example 1 and B represents example 1. As can be seen from fig. 1, the crosslinked hydrotalcite prepared in example 1 and the uncrosslinked hydrotalcite prepared in comparative example 1 have the same structure, indicating that the crosslinking agent does not enter the interlayer of the hydrotalcite, but rather, the crosslinking agent reacts with the surface of the hydrotalcite.
FIG. 2 is an SEM photograph of hydrotalcite-like compound and crosslinked hydrotalcite-like compound, in which A represents comparative example 1 and B represents example 1. As can be seen from fig. 2, the morphology of the uncrosslinked hydrotalcite prepared in comparative example 1 is sheet-shaped hexagonal, and stacking disorder among the sheets is not observed; the cross-linked hydrotalcite-like compound prepared in example 1 is subjected to ordered splicing and stacking of different hydrotalcite layer sheets under the action of the cross-linking agent, and the layer sheets are stacked in order to form a compact block.
Comparative example 2
187.6g of aluminum nitrate, 256.4g of magnesium nitrate, 31.8g of sodium carbonate, 13.6g of ethyltriethoxysilane and 1000mL of deionized water are fully mixed at 80 ℃, the pH value is adjusted to 11 by using sodium hydroxide, slurry is obtained and crystallized for 14h at 160 ℃, a filter cake is obtained by cooling and filtering, the obtained filter cake is dried for 10h at 120 ℃, and then the obtained product is crushed, so that the modified hydrotalcite is obtained.
Test example 1
The whiteness, the laser average particle size (D50), the laser average particle size (D90) and the specific surface area of the prepared cross-linked hydrotalcite were measured according to the analysis method of HG-T3820-2013 synthetic hydrotalcite, and the test results are shown in Table 1.
TABLE 1 results of Performance test of crosslinked hydrotalcite-like compounds
As can be seen from Table 1, the laser average particle diameters (D50) of the cross-linked hydrotalcite-like compounds are all larger than 6.5 μm, the laser average particle diameters (D50) of the cross-linked hydrotalcite-like compounds are all larger than 1.0 μm, and are obviously larger than the laser average particle diameters of the non-cross-linked hydrotalcite-like compounds and the surface-modified hydrotalcite-like compounds, which indicates that different hydrotalcite layers are orderly spliced and stacked under the action of the cross-linking agent, and the particle diameters of the obtained cross-linked hydrotalcite-like compounds are obviously; the specific surface area of the cross-linked hydrotalcite-like compound is less than 2.5m2(ii)/g, and the specific surface area of both the uncrosslinked hydrotalcite-like compound and the surface-modified hydrotalcite-like compound is more than 18.0m2The/g shows that the cross-linked hydrotalcite-like compound prepared by the preparation method provided by the invention has ordered and compact stacking among layers.
Example 4
Fully mixing 30 parts by weight of the cross-linked hydrotalcite-like compound prepared in example 1, 10 parts by weight of titanium dioxide and 5 parts by weight of barium sulfate, and grinding the mixture until the particle size is less than 15 microns to obtain mixed powder;
stirring and fully mixing the mixed powder, 30 parts of waterborne hydroxyl acrylic resin, 25 parts of deionized water, 1 part of wetting agent and 1 part of dispersing agent at the rotating speed of 600rpm to obtain first slurry;
stirring and fully mixing the first slurry and 20 parts of alkyd resin at the rotating speed of 2300rpm to obtain a second slurry;
and fully and uniformly stirring the second slurry, 1 part of defoaming agent, 2 parts of film-forming assistant, 1 part of flatting agent and 15 parts of deionized water to obtain the water-based paint.
Example 5
According to the weight portion, 30 portions of the cross-linking hydrotalcite prepared in the embodiment 2, 7.5 portions of titanium dioxide and 7.5 portions of barium sulfate are fully mixed and ground until the granularity is less than 15 μm, and mixed powder is obtained;
stirring and fully mixing the mixed powder, 40 parts of waterborne hydroxyl acrylic resin, 25 parts of deionized water, 1 part of wetting agent and 1 part of dispersing agent at the rotating speed of 600rpm to obtain first slurry;
stirring and fully mixing the first slurry and 15 parts of alkyd resin at the rotating speed of 2300rpm to obtain a second slurry;
and fully and uniformly stirring the second slurry, 1 part of defoaming agent, 2 parts of film-forming assistant, 1 part of flatting agent and 10 parts of deionized water to obtain the water-based paint.
Example 6
Fully mixing 30 parts by weight of the cross-linked hydrotalcite-like compound prepared in example 3, 5 parts by weight of titanium dioxide and 10 parts by weight of barium sulfate, and grinding the mixture until the particle size is less than 15 microns to obtain mixed powder;
and fully and uniformly stirring the mixed powder, 35 parts of waterborne hydroxyl acrylic resin, 20 parts of deionized water, 1 part of wetting agent and 1 part of dispersing agent, 15 parts of alkyd resin, 1 part of defoaming agent, 2 parts of film-forming assistant, 1 part of flatting agent and 20 parts of deionized water to obtain the water-based paint.
Comparative example 3
In parts by weight, 30 parts of hydrotalcite-like compound prepared in comparative example 1, 10 parts of titanium dioxide and 5 parts of barium sulfate were thoroughly mixed and ground to a particle size of less than 15 μm to obtain a mixed powder;
stirring and fully mixing the mixed powder, 30 parts of waterborne hydroxyl acrylic resin, 25 parts of deionized water, 1 part of wetting agent and 1 part of dispersing agent at the rotating speed of 600rpm to obtain first slurry;
stirring and fully mixing the first slurry and 20 parts of alkyd resin at the rotating speed of 2300rpm to obtain a second slurry;
and fully and uniformly stirring the second slurry, 1 part of defoaming agent, 2 parts of film forming assistant, 1 part of flatting agent and 15 parts of deionized water to obtain the water-based paint.
Comparative example 4
Fully mixing 30 parts by weight of the cross-linked hydrotalcite-like compound prepared in example 1, 10 parts by weight of titanium dioxide and 5 parts by weight of barium sulfate, and grinding the mixture until the particle size is 15 microns to obtain mixed powder;
and fully and uniformly stirring the mixed powder, 30 parts of waterborne hydroxyl acrylic resin, 40 parts of deionized water, 1 part of wetting agent, 1 part of dispersing agent, 20 parts of alkyd resin, 1 part of defoaming agent, 2 parts of film-forming assistant and 1 part of flatting agent to obtain the water-based paint.
Test example 2
Preparing a coating according to a method of national standard GB/T1765-1979, and testing the heat insulation performance of the coating according to a method of GB/T25261-2018 reflective heat insulation coating for buildings; the test results are shown in Table 2, and the diffuse reflectance of the coated sheet is shown in FIG. 3.
TABLE 2 Performance test results for Water-based coatings
As shown in Table 2, the coating material containing the crosslinked hydrotalcite-like compound has good workability and water resistance, and the adhesive strength and the heat-insulating property are remarkably improved.
FIG. 3 is a graph showing a comparison of the diffuse reflectance of coated sheets, wherein A represents a blank sheet, B represents a comparative example 2, C represents example 4, and D represents example 5. As can be seen from fig. 3, the addition of the crosslinked hydrotalcite-like compound significantly improves the diffuse reflectance of the coating film.
Fig. 4 is a graph showing a comparison of thermal insulation performance of different coatings, wherein a denotes a blank panel, B denotes comparative example 2, C denotes example 4, and D denotes example 5. As can be seen from FIG. 4, the thermal insulation temperature difference of the coating prepared by adding the non-crosslinked hydrotalcite-like compound is only 3.0 ℃, while the thermal insulation temperature difference of the coating prepared by adding the crosslinked hydrotalcite-like compound is respectively 26.9 ℃ and 26.6 ℃, which shows that the crosslinked hydrotalcite-like compound remarkably improves the thermal insulation property of the coating, and the water-based coating provided by the invention has excellent thermal insulation property.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A preparation method of cross-linked hydrotalcite-like compound is characterized by comprising the following steps:
mixing an aluminum source, a cross-linking agent and water, adjusting the pH value of the obtained mixed system to 5-9, and then carrying out chemical reaction to obtain slurry;
mixing the slurry, a divalent metal ion source and an anion source, adjusting the pH value of the obtained mixed material to 10-13, and then crystallizing to obtain cross-linked hydrotalcite-like compound;
the cross-linking agent comprises one or more of a silane coupling agent, an acrylic polymer and an acrylic copolymer;
the molar ratio of the aluminum source to the cross-linking agent to the divalent metal ion source to the anion source is 1 (0.005-0.2) to 1.5-4 to 0.3-0.8;
the temperature of the chemical reaction is 70-100 ℃, and the time is 2-8 h;
the crystallization temperature is 130-190 ℃, and the crystallization time is 12-20 h.
2. The preparation method of claim 1, wherein the aluminum source comprises one or more of aluminum nitrate, aluminum sulfate, aluminum chloride, sodium metaaluminate, aluminum hydroxide and aluminum oxide;
the divalent metal ion source comprises a magnesium compound and/or a zinc compound;
the source of anions comprises a soluble carbonate and/or a soluble bicarbonate.
3. An aqueous coating material, characterized by comprising the crosslinked hydrotalcite-like compound produced by the production method according to any one of claims 1 to 2.
4. The water-based paint according to claim 3, which is prepared from the following components in parts by weight:
25-40 parts of acrylic resin;
15-30 parts of cross-linked hydrotalcite-like compound;
15-30 parts of alkyd resin;
5-15 parts of titanium dioxide;
2-10 parts of barium sulfate;
0.1-2 parts of a wetting agent;
0.1-2 parts of a dispersing agent;
0.1-2 parts of a defoaming agent;
0.1-2 parts of a leveling agent;
0.1-2 parts of a film-forming assistant;
20-40 parts of water.
5. The aqueous coating of claim 4, wherein the dispersant comprises a nonionic surfactant.
6. The method for preparing the water-based paint according to any one of claims 3 to 5, characterized by comprising the following steps:
mixing and grinding the cross-linked hydrotalcite-like compound, titanium dioxide and barium sulfate to obtain mixed powder;
mixing the mixed powder with acrylic resin, part of water, a wetting agent and a dispersing agent to obtain first slurry;
mixing the first slurry with alkyd resin to obtain a second slurry;
and mixing the second slurry, the film forming auxiliary agent, the defoaming agent, the flatting agent and the residual water to obtain the water-based paint.
7. The method according to claim 6, wherein the particle size of the powder mixture is 0.1 to 15 μm;
the part of water accounts for 40-70 wt% of the total amount of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477010.7A CN110182833B (en) | 2019-06-03 | 2019-06-03 | Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477010.7A CN110182833B (en) | 2019-06-03 | 2019-06-03 | Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110182833A CN110182833A (en) | 2019-08-30 |
| CN110182833B true CN110182833B (en) | 2021-06-15 |
Family
ID=67719923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910477010.7A Active CN110182833B (en) | 2019-06-03 | 2019-06-03 | Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110182833B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956144A (en) * | 2022-06-07 | 2022-08-30 | 秦迎 | Hydrotalcite single-layer nano material and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000159520A (en) * | 1998-09-21 | 2000-06-13 | Kyowa Chem Ind Co Ltd | Hydrotalcite compound including low content uranium and production of the same compound |
| CN101980963A (en) * | 2008-03-31 | 2011-02-23 | 户田工业株式会社 | Particulate powder of hydrotalcite type compound, chlorinated-resin stabilizer comprising the particulate powder of hydrotalcite type compound, and chlorinated-resin composition |
| CN102834443A (en) * | 2010-03-09 | 2012-12-19 | 协和化学工业株式会社 | filler for synthetic resin, synthetic resin composition, manufacturing method therefor, and molded object made therefrom |
| CN103288108A (en) * | 2013-06-19 | 2013-09-11 | 肇庆学院 | Method for preparing hydrotalcite compound using brucite |
| CN103394327A (en) * | 2013-08-20 | 2013-11-20 | 青岛科技大学 | Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof |
| CN106006687A (en) * | 2016-05-18 | 2016-10-12 | 青岛科技大学 | Flower-ball-like LDHs (laminar double-metal hydroxides) and application thereof |
| CN106700523A (en) * | 2016-12-21 | 2017-05-24 | 衢州普信新材料有限公司 | Preparation method of nano hydrotalcite composite material |
| CN106995643A (en) * | 2017-05-23 | 2017-08-01 | 上海工程技术大学 | A kind of water paint of graphene-containing/zinc-aluminum gavite nano-complex and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL2055675T3 (en) * | 2006-07-31 | 2016-03-31 | Japan Dev & Construction | Hydrotalcite-like particulate material and method for production thereof |
| GB201217348D0 (en) * | 2012-09-28 | 2012-11-14 | Scg Chemicals Co Ltd | Modification of layered double hydroxides |
-
2019
- 2019-06-03 CN CN201910477010.7A patent/CN110182833B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000159520A (en) * | 1998-09-21 | 2000-06-13 | Kyowa Chem Ind Co Ltd | Hydrotalcite compound including low content uranium and production of the same compound |
| CN101980963A (en) * | 2008-03-31 | 2011-02-23 | 户田工业株式会社 | Particulate powder of hydrotalcite type compound, chlorinated-resin stabilizer comprising the particulate powder of hydrotalcite type compound, and chlorinated-resin composition |
| CN102834443A (en) * | 2010-03-09 | 2012-12-19 | 协和化学工业株式会社 | filler for synthetic resin, synthetic resin composition, manufacturing method therefor, and molded object made therefrom |
| CN103288108A (en) * | 2013-06-19 | 2013-09-11 | 肇庆学院 | Method for preparing hydrotalcite compound using brucite |
| CN103394327A (en) * | 2013-08-20 | 2013-11-20 | 青岛科技大学 | Silanized functionalized ionic liquid/hydrotalcite-like compound composite material, and preparation method and application thereof |
| CN106006687A (en) * | 2016-05-18 | 2016-10-12 | 青岛科技大学 | Flower-ball-like LDHs (laminar double-metal hydroxides) and application thereof |
| CN106700523A (en) * | 2016-12-21 | 2017-05-24 | 衢州普信新材料有限公司 | Preparation method of nano hydrotalcite composite material |
| CN106995643A (en) * | 2017-05-23 | 2017-08-01 | 上海工程技术大学 | A kind of water paint of graphene-containing/zinc-aluminum gavite nano-complex and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 表面改性的类水滑石催化醇的选择性氧化;王晓丽等;《石油学报(石油加工)》;20170331;第33卷(第2期);349-355 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110182833A (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9650520B2 (en) | Methods for preparing vanadium dioxide composite powders, vanadium dioxide powder slurry, and vanadium dioxide coating for intelligent temperature control | |
| CA2724691C (en) | Perovskite-type infrared reflective material | |
| CN102226043B (en) | Preparation method of titanium pigment used in ship paint | |
| EP3075709B1 (en) | Black fine particulate near-infrared reflective material, method for manufacturing same, and usage for same | |
| WO2018168596A1 (en) | Near infrared-reflective black pigment and method for producing same | |
| TWI726127B (en) | Photocatalyst laminate | |
| CN110105694B (en) | Special PVC stabilizer and preparation method and application thereof | |
| CN105452390A (en) | Black pigment having infrared-reflecting properties, and paint and resin composition that use said black pigment having infrared-reflecting properties | |
| CN110182833B (en) | Preparation method of cross-linked hydrotalcite-like compound, water-based paint and preparation method thereof | |
| JP6214412B2 (en) | Core-shell type oxide fine particle dispersion, method for producing the same, and use thereof | |
| TW201348138A (en) | Magnesium fluoride particle, magnesium fluoride particle dispersion, composition for forming layer having low refractive index, substrate with layer having low refractive index and methods for producing each same | |
| CN110684453A (en) | Water-based high-brightness easy-cleaning porcelainized coating for tunnel and preparation method thereof | |
| KR20080036109A (en) | Composite titanic acid coating film and composite titanic acid-coated resin substrate | |
| CN104011148A (en) | Oligomer-modified fine particles, method for producing same, and coating material | |
| TW202130584A (en) | Near-infrared absorbing material particles, near-infrared absorbing material particle dispersing solution, and near-infrared absorbing material particle dispersion | |
| TWI743134B (en) | Titanium dioxide product | |
| CN109627891B (en) | Coating containing hydrotalcite-attapulgite composite and preparation method thereof | |
| CN112662249A (en) | Preparation method of indoor sealing primer with heat preservation function | |
| WO2011059105A1 (en) | Heat-insulating agent composition | |
| NL2034435B1 (en) | Production of thermochromic vanadium dioxide particulate material | |
| CN115418116B (en) | Black pigment, pigment composition, and preparation method and application thereof | |
| CN118291025A (en) | Water-based wind power blade finishing paint with excellent alkali resistance and weather resistance and preparation method thereof | |
| KR20210048826A (en) | Inorganic oxide particle-containing dispersion composition, method for preparing the same and article using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |