CN109627891B - Coating containing hydrotalcite-attapulgite composite and preparation method thereof - Google Patents
Coating containing hydrotalcite-attapulgite composite and preparation method thereof Download PDFInfo
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- CN109627891B CN109627891B CN201811588533.0A CN201811588533A CN109627891B CN 109627891 B CN109627891 B CN 109627891B CN 201811588533 A CN201811588533 A CN 201811588533A CN 109627891 B CN109627891 B CN 109627891B
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- 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
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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Abstract
The invention provides a hydrotalcite-attapulgite composite and a preparation method thereof, as well as a coating containing the composite and a preparation method thereof, and the preparation method of the hydrotalcite-attapulgite composite comprises the following steps: (A) after being roasted, the hydrotalcite is added with an organic acid solution and a silane coupling agent and stirred uniformly, dynamically crystallized at the temperature of 60-150 ℃, and cooled to obtain organic silicon modified intercalated hydrotalcite slurry; (B) uniformly mixing attapulgite with deionized water and a silane coupling agent to obtain organic silicon modified attapulgite slurry; (C) and mixing the organic silicon modified intercalated hydrotalcite slurry and the organic silicon modified attapulgite slurry, and adding ammonium thiosulfate to obtain the organic silicon modified intercalated hydrotalcite/attapulgite composite material. The hydrotalcite-attapulgite composite has excellent performances in all aspects, and the coating prepared from the composite has improved heat insulation performance and stability.
Description
Technical Field
The invention relates to the field of coating processing, in particular to a hydrotalcite-attapulgite composite and a preparation method thereof, and further relates to a coating containing the composite and a preparation method of the coating.
Background
The building area is large in China, the building adding speed is high, the overall energy-saving standard-reaching rate of the building is low, the building energy consumption is one of three major 'energy-consuming households' in China, the economic development of China is severely restricted, and the building energy saving is pushed to the forefront. The heat-insulating coating for buildings is a novel coating for buildings, which integrates heat preservation, heat insulation and decoration, and is safe, energy-saving, environment-friendly and economical. The heat-insulating coating is coated on the surface of a building, so that the indoor temperature can be reduced, indoor heat is not easy to dissipate quickly, and the effect of 'warm in winter and cool in summer' is achieved, which is the simplest and most effective way for reducing the energy consumption of the building, and therefore, the heat-insulating coating is popular among consumers.
In the prior art, a hydrotalcite compound is a double-metal hydroxide with a layered structure, has the properties of adjustable composition and structure, thermal stability, alkalinity, infrared absorption, ultraviolet blocking and the like, and can enable a coating to have good functions of heat insulation, corrosion prevention, aging resistance, weather resistance and the like when being added into the coating.
In addition, the hydrotalcite-based water-based heat-insulating coating still has the phenomena of unsatisfactory heat-insulating effect, poor adhesive force, easy bubbling and falling of a coating film and the like, and the further application of the hydrotalcite-based water-based heat-insulating coating in the field of energy-saving buildings is restricted by the factors such as the phenomena.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a preparation method of an organic silicon modified hydrotalcite-attapulgite composite with an intercalation structure, which has the advantages of simple operation, close connection of operation steps, no three wastes generation in the operation process, green and environment-friendly whole process and mild operation conditions.
The second object of the present invention is to provide a hydrotalcite-attapulgite composite prepared by the above preparation method, which has excellent properties in all aspects and is improved in heat insulating properties and stability.
The third purpose of the invention is to provide a coating formula containing the hydrotalcite-attapulgite composite, the coating takes the composite as a main component, the heat insulation performance of the coating is obviously improved, the prepared water-based heat insulation coating has good adhesive force, and the coating does not bubble or fall off in the using process, and in addition, the coating takes water as a dispersing agent, so that the VOC emission is effectively reduced, and the coating accords with the concept of green chemistry.
The fourth purpose of the invention is to provide a further preparation method of the coating, the preparation method has simple operation steps, close connection of the front and the rear steps, environmental protection, excellent performance of the prepared coating, good economic benefit and wide application value.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the invention provides a preparation method of a hydrotalcite-attapulgite compound, which comprises the following steps:
(A) after being roasted, the hydrotalcite is added with an organic acid solution and a silane coupling agent and stirred uniformly, dynamically crystallized at the temperature of 60-150 ℃, and cooled to obtain organic silicon modified intercalated hydrotalcite slurry;
(B) uniformly mixing attapulgite with deionized water and a silane coupling agent to obtain organic silicon modified attapulgite slurry;
(C) and mixing the organic silicon modified intercalated hydrotalcite slurry and the organic silicon modified attapulgite slurry, and adding ammonium thiosulfate to obtain the organic silicon modified intercalated hydrotalcite/attapulgite composite material.
In the prior art, a hydrotalcite compound is a double-metal hydroxide with a layered structure, has the properties of adjustable composition and structure, thermal stability, alkalinity, infrared absorption, ultraviolet blocking and the like, and can enable a coating to have good functions of heat insulation, corrosion prevention, aging resistance, weather resistance and the like when being added into the coating.
In addition, the hydrotalcite-based water-based heat-insulating coating still has the phenomena of unsatisfactory heat-insulating effect, poor adhesive force, easy bubbling and falling of a coating film and the like, and the further application of the hydrotalcite-based water-based heat-insulating coating in the field of energy-saving buildings is restricted by the factors such as the phenomena.
The invention aims to solve the technical problems and provides a preparation method of an organic silicon modified hydrotalcite-attapulgite composite with an intercalation structure, wherein organic acid is adopted to intercalate hydrotalcite, so that the heat preservation and heat insulation performance of the composite can be improved, and a silane coupling agent is added to be crosslinked with organic intercalated hydrotalcite and attapulgite, so that the fundamental stability problem of the hydrotalcite-based coating is solved, of course, in the whole preparation method, the hydrotalcite and the attapulgite are respectively modified and then mixed with each other to form the composite, so that after the modified components are matched, the crosslinking degree between the hydrotalcite and the attapulgite can be increased, the stability is improved, the cross-linking and stabilizing effect between the hydrotalcite and the polymer component in the coating is also facilitated during the subsequent preparation process, so that the hydrotalcite and the attapulgite can be mixed after being respectively modified in the specific preparation process, is carried out strictly in accordance with the preparation method operations of the present invention.
In addition, the addition of the silane coupling agent can avoid aggregation of particles in a complex system to cause easy agglomeration of substances, and increase the mutual crosslinking effect between the hydrotalcite and polymers when coating emulsion is formed subsequently, thereby realizing firm bonding.
The ammonium thiosulfate is added subsequently in order to polymerize with the remaining excess organic acid.
Preferably, as a further practicable aspect, in the step (a), the pH of the organic acid solution is controlled to be between 5 and 7;
preferably, the roasting temperature of the hydrotalcite is 400-;
preferably, the temperature of the dynamic crystallization is 60-150 ℃, the time of the dynamic crystallization is 4-20h, and the temperature is cooled to below 60 ℃ after the dynamic crystallization;
preferably, the organic acid has a structure containing a carbon-carbon double bond, and more preferably at least one of acrylic acid and methacrylic acid.
Preferably, as a further implementable scheme, in the step (B), the mixing and stirring time is 1-3h, and the stirring temperature is 60-100 ℃.
Preferably, as a further implementable scheme, in the step (C), the organosilicon modified intercalated hydrotalcite slurry and the organosilicon modified attapulgite slurry are mixed and stirred for 1 to 3 hours at a stirring temperature of 60 to 100 ℃;
preferably, adding ammonium thiosulfate, stirring, keeping the temperature for 2 hours, carrying out suction filtration, drying and crushing;
preferably, the number of hydrolyzable groups of the silane coupling agent is two or more, and more preferably at least one of methyltriethoxysilane, methyltrimethoxysilane, tetraethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, propyltriethoxysilane.
In each of the above-mentioned optimization schemes, the quality of the prepared compound is improved by optimally adjusting the operation parameters involved in the whole preparation method, and particularly, the stirring temperature and time need to be controlled within a proper range, and if the temperature is too low, the normal operation of the reaction may be affected.
The invention also provides a hydrotalcite-attapulgite composite prepared by the preparation method;
preferably, in the composite, the mass ratio of the hydrotalcite to the attapulgite is (1-7) to (1-2).
The proportion of the hydrotalcite and the attapulgite in the composite is best controlled within the range, the mass ratio of the hydrotalcite to the attapulgite in the composite can be 2:1.2, 3:1.3, 4:1.6 and the like, and the stability and the film-forming property and the service life of a coating can be best only after the hydrotalcite and the attapulgite are controlled under the excellent mass ratio parameters.
The invention further provides a coating containing the compound, which is mainly prepared from the following raw materials: the coating comprises, by mass, 20-40 parts of water-based hydroxyl acrylic resin, 5-20 parts of alkyd resin, 25-50 parts of hydrotalcite-attapulgite composite, 1-5 parts of pigment, 0.1-2 parts of wetting agent, 0.1-2 parts of dispersing agent, 0.1-2 parts of defoaming agent, 0.1-2 parts of flatting agent, 0.1-5 parts of film-forming assistant and 10-50 parts of deionized water.
Preferably, in order to optimize the proportion of the raw materials, as a further implementable scheme, by mass, 30-35 parts of water-based hydroxyl acrylic resin, 10-15 parts of alkyd resin, 30-40 parts of hydrotalcite-attapulgite composite, 2-4 parts of pigment, 0.5-1.5 parts of wetting agent, 0.5-1.5 parts of dispersing agent, 0.5-1.5 parts of defoaming agent, 0.5-1.5 parts of leveling agent, 0.5-1.5 parts of film-forming assistant and 20-40 parts of deionized water.
By controlling the raw material components in the coating within a relatively proper range, the performance of the coating in all aspects is obviously improved.
In addition, the invention also provides a preparation method of the coating, which comprises the following steps:
(A) stirring and fully mixing the water-based hydroxyl acrylic resin, the alkyd resin and part of deionized water;
(B) adding a wetting agent, a dispersing agent, a hydrotalcite-attapulgite composite and a pigment in sequence, and fully stirring and dispersing to obtain a dispersion liquid;
(C) and adding a leveling agent, a film forming aid and a defoaming agent into the dispersion liquid, uniformly stirring, finally adding the rest of deionized water, and adjusting the viscosity.
According to the preparation method, the components are added in stages, so that the prepared coating is better in uniformity, the adding sequence is obtained by considering the specific properties and functions of each component, the properties are similar and are suitable for simultaneous addition, the prepared coating is good in fusion degree, and the quality is relatively guaranteed.
Preferably, as a further implementable solution, in the step (A), the rotation speed is between 500r/min and 800 r/min.
Preferably, as a further implementable solution, in the step (B), the rotation speed is 2000r/min-2500 r/min.
Compared with the prior art, the invention has the beneficial effects that:
1) in the water-based heat-insulating coating, the organic acid intercalated hydrotalcite is designed, so that the porosity of the filler is increased, and meanwhile, the organic acid intercalated hydrotalcite is compounded with attapulgite and compounded with the pigment, so that a formed coating has higher reflectivity, and simultaneously has the functions of a reflection-type heat-insulating coating and a barrier-type heat-insulating coating, and the heat-insulating property of the coating is obviously improved;
2) according to the invention, organic acid intercalated hydrotalcite containing carbon-carbon double bonds is adopted, and the carbon-carbon double bonds in the interlayer intercalant can be subjected to polymerization reaction with acrylic monomers according to requirements, so that the compatibility between the filler and a film forming material is improved, the uniformity and the flatness of the coating are improved, and the application range of the coating is expanded;
3) on one hand, the invention utilizes the principle of 'mutual attraction of heterogeneous charges' to compound the organic intercalated hydrotalcite with positive charge and the attapulgite with negative charge, and on the other hand, the silane coupling agent containing a plurality of reactive groups is used to crosslink with the organic intercalated hydrotalcite and the attapulgite, thereby solving the most fundamental stability problem of the hydrotalcite-based coating;
4) the silicon hydroxyl groups which are not crosslinked in the organic silicon modified intercalated hydrotalcite-attapulgite composite can be further crosslinked with silicate of a building, so that the water-based heat-insulating coating has good adhesive force, the problems of bubbling, falling and scumming can not occur in the using process, the service life is long, and the stability is good;
5) the coating disclosed by the invention takes water as a dispersing agent, so that the emission of VOC is effectively reduced, and the coating accords with the concept of green chemistry.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Preparation example 1
Preparing an organic silicon modified intercalated hydrotalcite-attapulgite compound:
1) weighing 60.0g of acrylic acid, dissolving in deionized water, adjusting the pH value with 6mol/L of sodium hydroxide to prepare an acrylic acid solution with the pH value of 5, weighing 50g of hydrotalcite, roasting at 400 ℃ for 1h, cooling, adding into the organic acid solution, adding 17.6g of methyltrimethoxysilane, stirring uniformly, dynamically crystallizing at 60 ℃ for 20h, and cooling to 60 ℃ to obtain the organic silicon modified intercalated hydrotalcite slurry.
2) Weighing 50g of attapulgite, adding the attapulgite into deionized water, adding 3.0g of methyltrimethoxysilane, stirring uniformly, and stirring under reflux at 60 ℃ for 3 hours to obtain organic silicon modified attapulgite slurry;
3) mixing the obtained organosilicon modified intercalated hydrotalcite slurry and organosilicon modified attapulgite slurry, refluxing and stirring at 100 ℃ for 1h, adding 0.25g of ammonium thiosulfate into the obtained slurry, stirring, keeping the temperature for 2h, performing suction filtration, drying and crushing to obtain the organosilicon modified intercalated hydrotalcite-attapulgite composite.
Preparation example 2
Preparing an organic silicon modified intercalated hydrotalcite-attapulgite compound:
1) weighing 86.5g of methacrylic acid, dissolving in deionized water, adjusting the pH value with 6mol/L of sodium hydroxide to prepare an acrylic acid solution with the pH value of 7, weighing 175g of hydrotalcite, roasting at 600 ℃ for 4h, cooling, adding into the organic acid solution, adding 12.3g of tetraethoxysilane, stirring uniformly, dynamically crystallizing at 150 ℃ for 4h, and cooling to 50 ℃ to obtain the organic silicon modified intercalated hydrotalcite slurry.
2) Weighing 50g of attapulgite, adding the attapulgite into deionized water, adding 3.0g of tetraethoxysilane, uniformly stirring, and carrying out reflux stirring at 100 ℃ for 1h to obtain organic silicon modified attapulgite slurry;
3) mixing the obtained organosilicon modified intercalated hydrotalcite slurry and organosilicon modified attapulgite slurry, refluxing and stirring at 60 ℃ for 3h, adding 0.25g of ammonium thiosulfate into the obtained slurry, stirring, keeping the temperature for 2h, performing suction filtration, drying and crushing to obtain the organosilicon modified intercalated hydrotalcite-attapulgite composite.
Preparation example 3
Preparing an organic silicon modified intercalated hydrotalcite-attapulgite compound:
1) weighing 86.5g of methacrylic acid, dissolving in deionized water, adjusting the pH value with 6mol/L of sodium hydroxide to prepare an acrylic acid solution with the pH value of 6, weighing 200g of hydrotalcite, roasting at 500 ℃ for 3h, cooling, adding into the organic acid solution, adding 12.3g of ethyltriethoxysilane, stirring uniformly, dynamically crystallizing at 100 ℃ for 10h, and cooling to 50 ℃ to obtain the organic silicon modified intercalated hydrotalcite slurry.
2) Weighing 50g of attapulgite, adding the attapulgite into deionized water, adding 3.0g of vinyl trimethoxy silane, uniformly stirring, and carrying out reflux stirring at 80 ℃ for 2 hours to obtain organic silicon modified attapulgite slurry;
3) mixing the obtained organosilicon modified intercalated hydrotalcite slurry and organosilicon modified attapulgite slurry, refluxing and stirring at 80 ℃ for 2h, adding 0.25g of ammonium thiosulfate into the obtained slurry, stirring, keeping the temperature for 2h, performing suction filtration, drying and crushing to obtain the organosilicon modified intercalated hydrotalcite-attapulgite composite.
Example 1
Preparation of the water-based heat insulation coating: stirring and fully mixing 20 parts of waterborne hydroxyl acrylic resin, 20 parts of alkyd resin and 15mL of deionized water at the rotating speed of 500 r/min; then, 2 parts of wetting agent, 2 parts of dispersing agent, 50 parts of modified intercalated hydrotalcite-attapulgite composite prepared in preparation example 1 and 5 parts of pigment are gradually added, and the mixture is stirred and fully mixed at the rotating speed of 2000r/min to reach proper fineness; then adding 5 parts of film forming additive, 0.1 part of flatting agent and 0.1 part of defoaming agent, fully and uniformly stirring, and adding 35ml of deionized water to adjust to proper viscosity.
Example 2
Preparation of the water-based heat insulation coating: stirring and fully mixing 40 parts of waterborne hydroxyl acrylic resin, 5 parts of alkyd resin and 5mL of deionized water at the rotating speed of 800 r/min; then gradually adding 0.1 part of wetting agent, 0.1 part of dispersing agent, 25 parts of modified intercalated hydrotalcite-attapulgite composite prepared in preparation example 2 and 1 part of pigment, and stirring and fully mixing at the rotating speed of 2500r/min to obtain a proper fineness; then 0.1 part of film forming auxiliary agent, 2 parts of flatting agent and 2 parts of defoaming agent are added and fully stirred evenly, and 5ml of deionized water is added to adjust to proper viscosity.
Example 3
Preparation of the water-based heat insulation coating: stirring and fully mixing 35 parts of water-based hydroxyl acrylic resin, 15 parts of alkyd resin and 5mL of deionized water at the rotating speed of 700 r/min; then gradually adding 1.5 parts of wetting agent, 0.5 part of dispersing agent, 30 parts of modified intercalated hydrotalcite-attapulgite composite prepared in preparation example 3 and 2 parts of pigment, and stirring and fully mixing at the rotating speed of 2100r/min to obtain a proper fineness; then adding 1.5 parts of film forming auxiliary agent, 0.5 part of flatting agent and 1.5 parts of defoaming agent, fully and uniformly stirring, and adding 15ml of deionized water to adjust to proper viscosity.
Example 4
Preparation of the water-based heat insulation coating: stirring and fully mixing 30 parts of waterborne hydroxyl acrylic resin, 10 parts of alkyd resin and 20mL of deionized water at the rotating speed of 600 r/min; then gradually adding 0.5 part of wetting agent, 1.5 parts of dispersing agent, 40 parts of modified intercalated hydrotalcite-attapulgite composite prepared in preparation example 3 and 4 parts of pigment, and stirring and fully mixing at the rotating speed of 2300r/min to obtain proper fineness; then 0.5 part of film forming additive, 1.5 parts of flatting agent and 0.5 part of defoaming agent are added and fully stirred evenly, and 20ml of deionized water is added to adjust to proper viscosity.
Comparative example 1
The specific operation steps are the same as those in example 4, except that 40 parts of the modified intercalated hydrotalcite-attapulgite composite prepared in preparation example 3 is replaced by 40 parts of hydrotalcite material.
The parts in the examples and comparative examples are parts by mass.
Experimental example 1
The specific relevant performance of the coatings prepared in examples 3 to 4 of the invention and comparative example 1 was tested, and the specific test performance data is shown in table 1 below.
TABLE 1 test results
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (16)
1. The preparation method of the hydrotalcite-attapulgite composite is characterized by comprising the following steps:
(A) after being roasted, the hydrotalcite is added with an organic acid solution and a silane coupling agent and stirred uniformly, dynamically crystallized at the temperature of 60-150 ℃, and cooled to obtain organic silicon modified intercalated hydrotalcite slurry;
(B) uniformly mixing attapulgite with deionized water and a silane coupling agent to obtain organic silicon modified attapulgite slurry;
(C) mixing the organic silicon modified intercalated hydrotalcite slurry and the organic silicon modified attapulgite slurry, and adding ammonium thiosulfate to obtain the organic silicon modified intercalated hydrotalcite slurry;
the organic acid is at least one of acrylic acid and methacrylic acid.
2. The method according to claim 1, wherein in the step (A), the pH of the organic acid solution is controlled to be 5 to 7.
3. The preparation method as claimed in claim 1, wherein the calcination temperature of hydrotalcite is 400-600 ℃ and the calcination time is 1-4 h.
4. The preparation method according to claim 1, wherein the temperature of the dynamic crystallization is 60-150 ℃, the time of the dynamic crystallization is 4-20h, and the temperature is cooled to below 60 ℃ after the dynamic crystallization.
5. The method according to claim 1, wherein in the step (B), the mixing and stirring time is 1 to 3 hours, and the stirring temperature is 60 to 100 ℃.
6. The production method according to claim 1, characterized in that, in the step (C), the organosilicon-modified intercalated hydrotalcite slurry and the organosilicon-modified attapulgite slurry are mixed and stirred for 1 to 3 hours at a temperature of 60 to 100 ℃.
7. The preparation method according to claim 1, wherein the ammonium thiosulfate is added, stirred and kept warm for 2 hours, and then the mixture is subjected to suction filtration, drying and crushing.
8. The production method according to claim 1, wherein the number of hydrolyzable groups of the silane coupling agent is two or more.
9. The method according to claim 1, wherein the silane coupling agent is at least one of methyltriethoxysilane, methyltrimethoxysilane, tetraethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, and propyltriethoxysilane.
10. The hydrotalcite-attapulgite composite prepared by the preparation method according to any one of claims 1 to 9.
11. The hydrotalcite-attapulgite composite according to claim 10, wherein the mass ratio of hydrotalcite to attapulgite in the composite is between (1-7) to (1-2).
12. A coating using the compound of claim 10 or 11, characterized by being prepared mainly from the following raw materials: the coating comprises, by mass, 20-40 parts of water-based hydroxyl acrylic resin, 5-20 parts of alkyd resin, 25-50 parts of hydrotalcite-attapulgite composite, 1-5 parts of pigment, 0.1-2 parts of wetting agent, 0.1-2 parts of dispersing agent, 0.1-2 parts of defoaming agent, 0.1-2 parts of flatting agent, 0.1-5 parts of film-forming assistant and 10-50 parts of deionized water.
13. The coating of claim 12, wherein the coating comprises, by mass, 30-35 parts of a water-based hydroxy acrylic resin, 10-15 parts of an alkyd resin, 30-40 parts of a hydrotalcite-attapulgite composite, 2-4 parts of a pigment, 0.5-1.5 parts of a wetting agent, 0.5-1.5 parts of a dispersant, 0.5-1.5 parts of an antifoaming agent, 0.5-1.5 parts of a leveling agent, 0.5-1.5 parts of a film-forming aid, and 20-40 parts of deionized water.
14. A method of preparing a coating according to claim 12 or 13, comprising the steps of:
(A) stirring and mixing the water-based hydroxyl acrylic resin, the alkyd resin and part of deionized water;
(B) sequentially adding a wetting agent, a dispersing agent, a hydrotalcite-attapulgite compound and a pigment, stirring and dispersing to obtain a dispersion liquid;
(C) and sequentially adding a flatting agent, a film-forming assistant and a defoaming agent into the dispersion liquid, uniformly stirring, finally adding the rest of deionized water, and adjusting the viscosity.
15. The method according to claim 14, wherein in the step (A), the rotation speed is 500-800 r/min.
16. The method according to claim 14, wherein the rotation speed in the step (B) is 2000r/min to 2500 r/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101081958A (en) * | 2007-07-05 | 2007-12-05 | 北京工商大学 | Inner wall heat-preservation coating |
| CN102408581A (en) * | 2011-10-24 | 2012-04-11 | 常州奥特纳新材料科技有限公司 | Attapulgite/hydrotalcite composite flame-retardant material and preparation method thereof |
| CN106543476A (en) * | 2016-12-08 | 2017-03-29 | 肇庆学院 | A kind of composite for PVC heat stabilizer and preparation method thereof |
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