CN113527969A - Waterproof flame-retardant coating for wood and application method thereof - Google Patents
Waterproof flame-retardant coating for wood and application method thereof Download PDFInfo
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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
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- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C09D191/00—Coating compositions based on oils, fats or waxes; Coating compositions based on derivatives thereof
- C09D191/06—Waxes
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
- C09D7/63—Additives non-macromolecular organic
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- 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
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The application relates to the field of coatings, and particularly discloses a waterproof flame-retardant coating for wood and an application method thereof, wherein the waterproof flame-retardant coating for wood comprises the following substances in parts by weight: 45-80 parts of matrix emulsion; 20-60 parts of an inorganic filler; 5-10 parts of decabromodiphenylethane; 2-5 parts of a dispersing agent; 3-5 parts of a defoaming agent; 45-60 parts of an inorganic sol solution; 60-80 parts of water; the solid content of the inorganic sol solution is 15-20%, and the inorganic sol solution comprises one or more of nano silica sol, nano zirconium sol and nano titanium sol. The application method comprises the following steps: s1, drying; s2, strengthening the waterproof performance; s3, mixing the paint; and S4, coating. According to the application, the sol material is adopted to modify the flame retardant coating, so that the compactness of wood is improved, the water absorption of the wood is reduced, and the waterproof performance of the wood flame retardant coating is improved.
Description
Technical Field
The application relates to the field of coatings, in particular to a waterproof flame-retardant coating for wood and an application method thereof.
Background
The wood is a porous polymer material, has the advantages of environmental protection, greenness, no toxicity, strong processability and reproducibility, has strong water absorption, is greatly influenced by the external environment, and is a material which is easily combustible and combustible. For example: temperature and humidity, etc. When the external environment changes greatly, the wood material absorbs water or loses water, so that the wood expands or contracts, the dimensional stability is poor, and the wood can crack, thereby causing damage to related articles and causing certain property loss to people.
Dried wood is a building and decoration material which is very easily combustible, and the fire retardant treatment of wood is very important in the building and decoration industry, so that the waterproof and fireproof treatment of wood is required when wood material is selected as a building material in a specific place. There are many methods for fire retarding and waterproofing wood, for example: the wood is soaked with special liquid medicine, coated with paint and the like, the wood is generally subjected to waterproof and flame-retardant treatment in China, the wood is treated step by step, and the steps are complex.
In order to effectively prevent the occurrence of fire and reduce the risk of fire, the existing proposal is often to improve the fire-retardant property of wood by coating the surface of the wood with a fire-retardant coating. However, most of the existing flame-retardant coatings have poor water resistance and cannot meet the waterproof requirement.
Disclosure of Invention
In order to overcome the defect of poor water resistance of the conventional flame-retardant coating for wood, the application provides a waterproof flame-retardant coating for wood and an application method thereof, and the following technical scheme is adopted:
in a first aspect, the application provides a waterproof flame-retardant coating for wood, which adopts the following technical scheme:
the waterproof flame-retardant coating for the wood comprises the following substances in parts by weight: 45-80 parts of matrix emulsion; 20-60 parts of an inorganic filler; 5-10 parts of decabromodiphenylethane; 2-5 parts of a dispersing agent; 3-5 parts of a defoaming agent; 45-60 parts of an inorganic sol solution; 60-80 parts of water; the solid content of the inorganic sol solution is 15-20%, and the inorganic sol solution comprises one or more of nano silica sol, nano zirconium sol and nano titanium sol.
By adopting the technical scheme, the sol material is adopted to modify the flame-retardant coating, so that the flame retardant property of the flame-retardant coating is effectively improved by adding the traditional inorganic filler and the flame retardant.
On the other hand, the inorganic sol solution is selected to modify the flame-retardant coating in the technical scheme, after the inorganic sol solution is added into the coating and the flame-retardant coating is dried and cured, the inorganic sol solution has a good coating effect on the surface of the wood, and meanwhile, nano inorganic particles in the inorganic sol solution can effectively penetrate and fill capillary channels and pores in the wood, so that the compactness of the wood is improved, the water absorption rate of the wood is reduced, and the waterproof performance of a wood matrix is further improved.
The application also optimizes the solid content of the inorganic sol solution, and the inorganic sol solution with the optimized solid content can form a uniform and stable coating form on the surface of the wood, so that pores and capillary pipelines inside the wood are effectively blocked, and the waterproof performance of the flame-retardant coating is further improved.
Further, the waterproof flame-retardant coating for wood also comprises 10-20 parts of a waterproof reinforcing agent, wherein the waterproof reinforcing agent comprises the following substances in parts by weight: 45-50 parts of water; 3-5 parts of wax; 1-5 parts of a surfactant; 15-20 parts of polyvinyl alcohol solution.
By adopting the technical scheme, the waterproof strengthening emulsion is formed by adopting the wax as the main waterproof strengthening material and then under the action of the surfactant material, and the waterproof strengthening agent in the emulsion form has high stability and can effectively permeate and improve the waterproof performance of the surface of the wood, so that pores and capillary pipelines inside the wood are effectively plugged, and the waterproof performance of the flame retardant coating is further improved.
Further, the inorganic sol solution also comprises biomass organic acid, and the mass of the biomass organic acid is 5-8% of that of the inorganic sol solution.
Through adopting above-mentioned technical scheme, this application is through adding living beings organic acid in inorganic sol solution as modified material, and at the in-process of in-service use, inorganic sol solution after high temperature combustion, living beings organic acid decomposes and releases the phosphoric acid molecule, promotes the formation of coacervate charcoal layer, and isolated or slow down heat transfer and the material exchange of timber material and external to improve timber material's fire behaviour.
Further, the matrix emulsion comprises any one of acrylate emulsion, vinyl acetate-ethylene copolymer emulsion and styrene-acrylic emulsion.
By adopting the technical scheme, the substrate emulsion is preferably selected to have good weather resistance and waterproof performance, and a good coating waterproof effect can be formed through the substrate emulsion in the actual use process, so that a good waterproof protective layer is further formed on the basis of the flame-retardant coating, and the waterproof performance of the flame-retardant coating is further improved.
Further, the wax includes any one or more of beeswax, carnauba wax, and paraffin wax.
Through adopting above-mentioned technical scheme, because the material of wax has been optimized in this application, select the wax that has good performance and cost are moderate, through in the preparation process, wax can effectively form the solidified layer and shutoff timber surface structure on timber surface, and the coating of this application preparation has formed good structure under the modification of wax simultaneously to flame retardant coating's waterproof performance has been improved.
In a second aspect, the application provides an application method of a waterproof flame-retardant coating for wood, which adopts the following technical scheme:
an application method of a waterproof flame-retardant coating for wood comprises the following specific preparation steps:
s1, drying: placing the wood in a drying device, and drying until the water content is 15-20% to obtain dried wood;
s2, waterproof strengthening: stirring and mixing water, wax, a surfactant and a polyvinyl alcohol solution, placing the mixture in an ultrasonic dispersing device for ultrasonic dispersion to obtain a waterproof reinforcing agent, coating the waterproof reinforcing agent on the surface of dry wood, and drying and curing for 24 hours to obtain waterproof reinforced wood;
s3, mixing the coating: stirring and mixing the matrix emulsion, the inorganic filler, the decabromodiphenylethane, the dispersing agent, the defoaming agent, the inorganic sol solution and water according to the formula, homogenizing for 15min, and collecting to obtain a coating mixed solution;
s4, coating: and (5) coating the coating mixed solution prepared in the step (S3) on the surface of the waterproof reinforced wood, drying at 50-60 ℃ for 48h after coating, standing and cooling to room temperature to finish the application of the waterproof flame-retardant coating for wood.
Through adopting above-mentioned technical scheme, this application carries out drying process to timber earlier, makes the inside moisture content of timber base member neither too high nor can low excessively, and this application carries out effectual water repellent through waterproof strengthening agent to the timber surface earlier simultaneously, improves its waterproof performance, on this basis, through carrying out effectual coating with fire retardant coating to on traditional waterproof fire retardant coating's basis, advance one and improve ligneous waterproof flame retardant efficiency through the waterproof strengthening layer that forms.
Further, the coating thickness of the waterproof reinforcing agent in the step S2 is 0.2-0.8 mm.
Through adopting above-mentioned technical scheme, this application is through optimizing the coating thickness of waterproof reinforcer, prevents that waterproof strengthening layer leads to between its and the timber bonding strength to hang down excessively owing to excessive coating, and subsequent flame retardant coating coats the back, produces the not good defect of bonding property, and the thickness of waterproof strengthening layer is further optimized simultaneously, prevents that its waterproof strengthening layer from being too thin to lead to the not good defect of waterproof property to flame retardant coating's waterproof performance has further been improved.
Further, the coating thickness of the coating mixture liquid in the step S4 is 3-5 mm.
By adopting the technical scheme, the coating thickness of the flame-retardant coating is optimized, so that the flame-retardant coating can play a good heat-insulating and flame-retardant effect in the actual use process, and the flame retardant property of the flame-retardant coating is further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
firstly, the flame retardant coating is modified by adopting the sol material, so that on one hand, the flame retardant property of the flame retardant coating is effectively improved by adding the traditional inorganic filler and the flame retardant.
On the other hand, the inorganic sol solution is selected to modify the flame-retardant coating in the technical scheme, after the inorganic sol solution is added into the coating and the flame-retardant coating is dried and cured, the inorganic sol solution has a good coating effect on the surface of the wood, and meanwhile, nano inorganic particles in the inorganic sol solution can effectively penetrate and fill capillary channels and pores in the wood, so that the compactness of the wood is improved, the water absorption rate of the wood is reduced, and the waterproof performance of a wood matrix is further improved.
The application also optimizes the solid content of the inorganic sol solution, and the inorganic sol solution with the optimized solid content can form a uniform and stable coating form on the surface of the wood, so that pores and capillary pipelines inside the wood are effectively blocked, and the waterproof performance of the flame-retardant coating is further improved.
And secondly, the waterproof strengthening emulsion is formed by adopting wax as a main waterproof strengthening material and under the action of a surfactant material, and the waterproof strengthening agent in the emulsion form has high stability and can effectively permeate and improve the waterproof performance of the surface of the wood, so that pores and capillary pipelines inside the wood are effectively plugged, and the waterproof performance of the flame retardant coating is further improved.
And thirdly, the biomass organic acid is added into the inorganic sol solution to serve as a modified material, and in the actual use process, after the inorganic sol solution is combusted at high temperature, the biomass organic acid is decomposed to release phosphoric acid molecules, so that the formation of a condensed phase carbon layer is promoted, and the heat transfer and the material exchange between the wood material and the outside are isolated or slowed down, so that the flame retardant property of the wood material is improved.
Fourth, this application carries out drying process to timber earlier, makes the inside moisture content of timber base member neither too high nor can low excessively, and this application carries out effectual water repellent through waterproof strengthening agent to timber surface earlier simultaneously, improves its waterproof performance, on this basis, through carrying out effectual coating with fire retardant coating to on traditional waterproof fire retardant coating's the basis, advance one through the waterproof strengthening layer of formation and improve ligneous waterproof flame retardant efficiency.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
The starting materials for the preparation examples, examples and comparative examples of the present application are commercially available unless otherwise specified.
The instrument comprises the following steps: force-increasing electric stirrer: model JJ-1, Shanghai Meixiang Instrument Co., Ltd;
digital display constant temperature water bath: model HH-4, Australian instruments, Inc., Changzhou;
an electronic balance: model FA2104, shanghai liangping instruments ltd;
and (3) vacuum drying oven: model DZ-2BL, Tensted instruments, Inc., Tianjin;
medicine preparation: dispersing agent: DS-195, Liaoning Seifei chemical Co., Ltd;
defoaming agent: polyether/silicone defoamers from southeast brightness new materials, inc;
surfactant (b): CAB-35 Cocamidopropyl betaine, Jinan Chengxuan chemical Co., Ltd;
phytic acid: shandong Nu Ju Biotech Co., Ltd.
Examples
Example 1
S1, drying: placing the wood in a drying device, and drying at the temperature of 50 ℃ in an environment until the water content of the wood is 15% to obtain dried wood;
s2, waterproof strengthening: mixing 45kg of water, 3kg of beeswax, 1kg of cocamidopropyl betaine and 15kg of 5% polyvinyl alcohol solution by mass percent, stirring, placing the mixture in an ultrasonic dispersion device, performing ultrasonic dispersion for 20min at 500W to obtain a waterproof reinforcing agent, coating the waterproof reinforcing agent on the surface of dried wood, adjusting the coating thickness to be 0.2mm, and drying and curing at 55 ℃ for 24h to obtain waterproof reinforced wood;
s3, mixing the coating: stirring and mixing 45kg of acrylate emulsion, 20kg of heavy calcium carbonate, 5kg of decabromodiphenylethane, 2 parts of dispersing agent, 3 parts of defoaming agent, 45kg of nano silica sol with the solid content of 15 percent and 60kg of water, homogenizing for 15min, and collecting to obtain a coating mixed solution;
s4, coating: and (4) coating the coating mixed solution prepared in the step (S3) on the surface of the waterproof reinforced wood, adjusting the coating thickness to be 3mm, drying at 50 ℃ for 48h after coating, standing and cooling to room temperature to finish the application of the waterproof flame-retardant coating for wood.
Example 2
S1, drying: placing the wood in a drying device, and drying at 55 ℃ in an environment until the water content of the wood is 15% to obtain dried wood;
s2, waterproof strengthening: mixing 47kg of water, 4kg of beeswax, 2kg of cocamidopropyl betaine and 17kg of 5% polyvinyl alcohol solution by mass percent, stirring, placing in an ultrasonic dispersion device, performing ultrasonic dispersion for 20min at 500W to obtain a waterproof reinforcing agent, coating the waterproof reinforcing agent on the surface of dried wood, adjusting the coating thickness to be 0.2mm, and drying and curing at 57 ℃ for 24h to obtain the waterproof reinforced wood;
s3, mixing the coating: stirring and mixing 62kg of acrylate emulsion, 40kg of heavy calcium carbonate, 7kg of decabromodiphenylethane, 4 parts of dispersing agent, 4 parts of defoaming agent, 52kg of nano silica sol with the solid content of 15 percent and 70kg of water, homogenizing for 15min, and collecting to obtain a coating mixed solution;
s4, coating: and (4) coating the coating mixed solution prepared in the step (S3) on the surface of the waterproof reinforced wood, adjusting the coating thickness to be 3mm, drying at 55 ℃ for 48h after coating is finished, standing and cooling to room temperature, and finishing the application of the waterproof flame-retardant coating for wood.
Example 3
S1, drying: placing the wood in a drying device, and drying at the temperature of 60 ℃ in an environment until the water content of the wood is 15% to obtain dried wood;
s2, waterproof strengthening: mixing 50kg of water, 5kg of beeswax, 5kg of cocamidopropyl betaine and 20kg of a 5% polyvinyl alcohol solution by mass fraction, stirring, placing the mixture in an ultrasonic dispersion device, performing ultrasonic dispersion for 20min at 500W to obtain a waterproof reinforcing agent, coating the waterproof reinforcing agent on the surface of dried wood, adjusting the coating thickness to be 0.2mm, and performing drying and curing at 60 ℃ for 24h to obtain waterproof reinforced wood;
s3, mixing the coating: stirring and mixing 80kg of acrylate emulsion, 60kg of heavy calcium carbonate, 10kg of decabromodiphenylethane, 5 parts of dispersing agent, 5 parts of defoaming agent, 60kg of nano silica sol with the solid content of 15 percent and 80kg of water, homogenizing for 15min, and collecting to obtain a coating mixed solution;
s4, coating: and (4) coating the coating mixed solution prepared in the step (S3) on the surface of the waterproof reinforced wood, adjusting the coating thickness to be 3mm, drying at 60 ℃ for 48h after coating, standing and cooling to room temperature to finish the application of the waterproof flame-retardant coating for wood.
Example 4
The application of the waterproof flame-retardant coating for the wood is different from the embodiment 1 in that the water content of the wood in the embodiment 4 is 20 percent, and the preparation conditions and the scheme are the same as those in the embodiment 1.
Example 5
The application of a waterproof and flame-retardant coating for wood is different from the application of example 1 in that the beeswax in example 1 is replaced by palm wax in example 5, and the preparation conditions and the scheme are the same as those in example 1.
Example 6
The application of a waterproof flame-retardant coating for wood is different from the application of example 1 in that paraffin wax is used instead of beeswax in example 1 in example 6, and the preparation conditions and scheme are the same as those in example 1.
Example 7
The application of the waterproof flame-retardant coating for the wood is different from the embodiment 1 in that the solid content of the nano silica sol in the embodiment 7 is 20 percent, and the preparation conditions and the scheme are the same as those in the embodiment 1.
Example 8
The application of the waterproof flame-retardant coating for wood is different from the embodiment 1 in that nano zirconium sol with the solid content of 15% is adopted to replace the nano silicon sol in the embodiment 1 in the embodiment 8, and the rest preparation conditions and the scheme are the same as those in the embodiment 1.
Example 9
The application of the waterproof flame-retardant coating for wood is different from the embodiment 1 in that the nano-titanium sol with the solid content of 15% is adopted to replace the nano-silica sol in the embodiment 1 in the embodiment 8, and the rest of the preparation conditions and the scheme are the same as those in the embodiment 1.
Example 10
The application of the waterproof flame-retardant coating for the wood is different from the embodiment 1 in that phytic acid with the mass of 5% is added into the inorganic sol liquid in the embodiment 10, and the preparation conditions and the scheme are the same as those in the embodiment 1.
Example 11
The application of the waterproof flame-retardant coating for the wood is different from the embodiment 1 in that the embodiment 11 also adds 8 percent of phytic acid by mass into the inorganic sol solution, and the other preparation conditions and the scheme are the same as the embodiment 1.
Example 12
The application of a waterproof flame-retardant coating for wood is different from the example 1 in that the vinyl acetate-ethylene copolymer emulsion is used instead of the acrylate emulsion used in the example 12, and the preparation conditions and the scheme are the same as those in the example 1.
Example 13
The application of a waterproof flame-retardant coating for wood is different from the application of the example 1 in that the styrene-acrylic emulsion is used to replace the acrylic emulsion used in the application of the example 13, and the preparation conditions and the scheme are the same as those of the application of the example 1.
Example 14
The application of a waterproof flame-retardant coating for wood is different from example 1 in that the waterproof reinforcing agent is coated to a thickness of 0.8mm in example 14, and the other preparation conditions and the scheme are the same as those in example 1.
Example 15
The application of the waterproof flame-retardant coating for wood is different from the application of the waterproof flame-retardant coating in the embodiment 1 in that the coating thickness of the coating mixed solution in the embodiment 15 is 5mm, and the preparation conditions and the scheme are the same as those in the embodiment 1.
Comparative example
Comparative example 1: the application method of the waterproof flame-retardant coating for the wood is different from that of the example 1 in that no inorganic sol solution is added in the comparative example 1, and the other preparation schemes and material compositions are the same as those in the example 1.
Comparative example 2: the application method of the waterproof flame-retardant coating for the wood is different from that of the example 1 in that a polyethylene glycol solution with the mass fraction of 20% is adopted in the comparative example 2 to replace the inorganic sol solution in the example 1, and the rest preparation schemes and material compositions are the same as those in the example 1.
Performance test
The waterproof flame-retardant wood prepared in examples 1 to 15 and comparative examples 1 to 2 were subjected to performance tests, respectively.
Detection method/test method
(1) Flame retardant property: test of Limited oxygen index the JF-3 type oxygen index tester for testing Limited oxygen index measures the Limited oxygen index of a sample according to test standard GB/T1406-93, the test sample is 80mm x 10mm x 4 mm. The oxygen index is an experimental method for measuring the minimum oxygen concentration required for just maintaining the combustion of a sample in a mixed gas flow of oxygen and nitrogen (wherein, the oxygen and the nitrogen refer to high-purity oxygen and high-purity nitrogen, and the purity is more than 99.5 percent).
(2) Waterproof performance: the waterproof performance is tested according to the relevant test method in the national standard JC/T864-2008 polymer emulsion building waterproof paint.
The specific detection results are shown in the following table 1:
TABLE 1 Performance test in examples 1 to 15 and comparative examples 1 to 2
Performance analysis was performed from table 1 above:
(1) the method comprises the steps of comparing the groups of the embodiments 1 to 9, the groups of the embodiments 10 to 11 and the groups of the embodiments 12 to 15, wherein the three groups are combined, and the comparison between the groups and the data in the table 1 show that the data of the embodiments 10 to 11 are most excellent and the waterproof and flame retardant properties of the groups are higher than those of the conventional scheme.
Meanwhile, the solid content of the inorganic sol solution is optimized, the inorganic sol solution with the optimized solid content can form a uniform and stable coating form on the surface of the wood, and pores and capillary pipelines inside the wood are effectively blocked, so that the waterproof performance of the flame-retardant coating is further improved.
On the basis, from the examples 10 to 11, the phytic acid is further added into the inorganic sol solution in the examples 10 to 11, which indicates that the biomass organic acid is added to be the modified material in the technical scheme of the application, and in the actual use process, after the inorganic sol solution is combusted at high temperature, the biomass organic acid is decomposed to release phosphoric acid molecules, so that the formation of a condensed phase carbon layer is promoted, and the heat transfer and the substance exchange between the wood material and the outside are isolated or slowed down, so that the flame retardant property of the wood material is improved.
(2) Comparing the example 1 with the comparative examples 1-2, further explaining that the flame retardant coating is modified by the sol material according to the technical scheme of the application, on one hand, the flame retardant property of the flame retardant coating is effectively improved by adding the traditional inorganic filler and the flame retardant, and on the other hand, the flame retardant coating is modified by the inorganic sol solution according to the technical scheme of the application, so that the compactness of wood is improved, the water absorption rate of the wood is reduced, and the waterproof property of a wood substrate is further improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The waterproof flame-retardant coating for the wood is characterized by comprising the following substances in parts by weight:
45-80 parts of matrix emulsion;
20-60 parts of an inorganic filler;
5-10 parts of decabromodiphenylethane;
2-5 parts of a dispersing agent;
3-5 parts of a defoaming agent;
45-60 parts of an inorganic sol solution;
60-80 parts of water; the solid content of the inorganic sol solution is 15-20%, and the inorganic sol solution comprises one or more of nano silica sol, nano zirconium sol and nano titanium sol.
2. The waterproof and flame-retardant coating for wood as claimed in claim 1, further comprising 10-20 parts of a waterproof reinforcing agent, wherein the waterproof reinforcing agent comprises the following substances in parts by weight:
45-50 parts of water;
3-5 parts of wax;
1-5 parts of a surfactant;
15-20 parts of polyvinyl alcohol solution.
3. The waterproof and flame-retardant coating for wood as claimed in claim 1, wherein the inorganic sol solution further comprises a biomass organic acid, and the mass of the biomass organic acid is 5-8% of that of the inorganic sol solution.
4. The waterproof and flame-retardant coating for wood as claimed in claim 3, wherein the base emulsion comprises any one of acrylate emulsion, vinyl acetate-ethylene copolymer emulsion and styrene-acrylic emulsion.
5. The waterproof and flame-retardant coating for wood as claimed in claim 2, wherein the wax includes any one or more of beeswax, carnauba wax and paraffin wax.
6. The method for applying the waterproof and flame-retardant coating for wood according to any one of claims 1 to 7, comprising the steps of:
s1, drying: placing the wood in a drying device, and drying until the water content is 15-20% to obtain dried wood;
s2, waterproof strengthening: stirring and mixing water, wax, a surfactant and a polyvinyl alcohol solution, placing the mixture in an ultrasonic dispersing device for ultrasonic dispersion to obtain a waterproof reinforcing agent, coating the waterproof reinforcing agent on the surface of dry wood, and drying and curing for 24 hours to obtain waterproof reinforced wood;
s3, mixing the coating: stirring and mixing the matrix emulsion, the inorganic filler, the decabromodiphenylethane, the dispersing agent, the defoaming agent, the inorganic sol solution and water according to the formula, homogenizing for 15min, and collecting to obtain a coating mixed solution;
s4, coating: and (5) coating the coating mixed solution prepared in the step (S3) on the surface of the waterproof reinforced wood, drying at 50-60 ℃ for 48h after coating, standing and cooling to room temperature to finish the application of the waterproof flame-retardant coating for wood.
7. The method of claim 6, wherein the thickness of the water-proofing reinforcing agent applied in step S2 is 0.2-0.8 mm.
8. The method of claim 6, wherein the coating thickness of the coating mixture solution in step S4 is 3-5 mm.
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| CN202110877810.5A CN113527969A (en) | 2021-08-02 | 2021-08-02 | Waterproof flame-retardant coating for wood and application method thereof |
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