CN114907732A - Water-based wood coating based on nanocrystals and preparation process thereof - Google Patents
Water-based wood coating based on nanocrystals and preparation process thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000000576 coating method Methods 0.000 title claims abstract description 76
- 239000011248 coating agent Substances 0.000 title claims abstract description 68
- 239000002159 nanocrystal Substances 0.000 title claims abstract description 46
- 239000002023 wood Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 44
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 32
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- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 25
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 25
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 25
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 24
- 239000001913 cellulose Substances 0.000 claims abstract description 24
- 229920002678 cellulose Polymers 0.000 claims abstract description 24
- RWNUSVWFHDHRCJ-UHFFFAOYSA-N 1-butoxypropan-2-ol Chemical compound CCCCOCC(C)O RWNUSVWFHDHRCJ-UHFFFAOYSA-N 0.000 claims abstract description 22
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- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 22
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- 238000012986 modification Methods 0.000 claims abstract description 7
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- ZQBAKBUEJOMQEX-UHFFFAOYSA-N salicylic acid phenyl ester Natural products OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 claims description 20
- 239000003973 paint Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
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- XMSXQFUHVRWGNA-UHFFFAOYSA-N Decamethylcyclopentasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 XMSXQFUHVRWGNA-UHFFFAOYSA-N 0.000 claims description 10
- 108010010803 Gelatin Proteins 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
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- 229920001525 carrageenan Polymers 0.000 claims description 10
- 235000010418 carrageenan Nutrition 0.000 claims description 10
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- 239000008273 gelatin Substances 0.000 claims description 10
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- 235000019322 gelatine Nutrition 0.000 claims description 10
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- GDESWOTWNNGOMW-UHFFFAOYSA-N resorcinol monobenzoate Chemical compound OC1=CC=CC(OC(=O)C=2C=CC=CC=2)=C1 GDESWOTWNNGOMW-UHFFFAOYSA-N 0.000 claims description 10
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- 241001474374 Blennius Species 0.000 claims description 8
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- 230000032683 aging Effects 0.000 claims description 5
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 5
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
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- 239000013530 defoamer Substances 0.000 claims description 2
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- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 description 5
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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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- 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
- C09D7/43—Thickening agents
- C09D7/44—Combinations of two or more thickening agents
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
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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
- 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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- 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
- C09D7/65—Additives macromolecular
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention discloses a water-based wood coating based on nano-crystals and a preparation process thereof, wherein the formula comprises the following components: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the weight parts of the components are respectively as follows: 62-74 parts of water-based acrylic resin, 47-55 parts of deionized water, 4-6 parts of a silane coupling agent KH560, 15-19 parts of cellulose nanocrystals, 6-8 parts of propylene glycol butyl ether, 2-4 parts of polyacrylic acid, 1-3 parts of talcum powder, 5-7 parts of polyethylene glycol, 9-13 parts of an anti-aging agent, 5-7 parts of a thickening agent, 1-3 parts of an antifoaming agent and 2-4 parts of a coloring agent; the surface strength and tensile strength of the coating are improved through modification, the rigidity of the coating is improved, the comprehensive performance is stronger, and the use requirements of different scenes are met.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a nanocrystal-based water-based wood coating and a preparation process thereof.
Background
The waterborne wood coating is used earlier in European and American markets, the waterborne wood coating starts later in China, but the attention degree is higher and higher, and colleges and universities, scientific research institutions and production enterprises engaged in the research of the waterborne wood coating are more and more. The waterborne wood coating product is gradually applied to public places such as high-grade hotels, factories, schools, markets, hospitals and the like, but the development among regions is unbalanced, and the waterborne wood coating product is mainly concentrated in Guangdong, Yangtze river, Jingjin and other economically developed or coastal large and medium cities. At present, the consumption objects of the water-based wood coatings are mainly concentrated on high-income people. With the continuous improvement of the living standard of substances, the spiritual life of people is richer, the requirement on the home environment is higher and higher, the interior decoration is gradually fashionable due to the fact that the interior decoration is environment-friendly, healthy and sanitary, and the water-based paint can just meet the requirement, so that the water-based paint has a huge market space. The consumer's line of favor for aqueous wood coatings is constantly growing and expanding. People have stricter requirements on coatings used for wood products, and the application of safe and environment-friendly water-based coatings in the wood industry becomes a trend.
In the prior art, for example, the Chinese patent (publication No. CN106893468A) discloses a water-based wood coating and a preparation method thereof. The water-based wood coating comprises water, 100 parts of mixed resin component and 70-100 parts of siloxane according to parts by mass; wherein the raw material of the mixed resin component comprises a mixed resin composed of a water-based hydroxyl acrylic resin and a water-based hydroxyl polyurethane resin.
However, the aqueous wood coating adopts two resin crosslinking modification modes, is limited by resin materials, has low surface strength and tensile strength and poor rigidity, has larger difference in comprehensive performance compared with solvent-based coatings, is difficult to meet the use requirements of different scenes, has poor market competitiveness, more residual moisture and gas, low viscosity and small surface adhesion, has falling risk after coating, poor working reliability, does not have ultraviolet resistance and oxidation resistance, has serious material aging under severe environment and poor chemical stability, and inevitably influences the service life of the coating.
Disclosure of Invention
The invention aims to provide a nanocrystal-based water-based wood coating and a preparation process thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the nano crystal-based water-based woodware coating comprises the following formula: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the weight parts of the components are respectively as follows: 62-74 parts of water-based acrylic resin, 47-55 parts of deionized water, 4-6 parts of a silane coupling agent KH560, 15-19 parts of cellulose nanocrystals, 6-8 parts of propylene glycol butyl ether, 2-4 parts of polyacrylic acid, 1-3 parts of talcum powder, 5-7 parts of polyethylene glycol, 9-13 parts of an anti-aging agent, 5-7 parts of a thickening agent, 1-3 parts of an antifoaming agent and 2-4 parts of a coloring agent.
Preferably, the anti-aging agent is prepared by mixing phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide, and the weight ratio of the phenyl o-hydroxybenzoate, the phenylenediamine, the resorcinol monobenzoate and the dimethylformamide is 2: 3: 2: 1.
Preferably, the thickening agent is formed by mixing carrageenan, gelatin and seaweed gel, and the weight ratio of the carrageenan, the gelatin and the seaweed gel is 1: 3: 1.
Preferably, the defoaming agent is formed by mixing cyclomethicone, fatty alcohol-polyoxyethylene ether and polyethylene glycol siloxane, and the weight ratio of the cyclomethicone to the fatty alcohol-polyoxyethylene ether to the polyethylene glycol siloxane is 1: 3: 2.
Preferably, the colorant is any one or two of pigment carbon black, cobalt blue, titanium dioxide, cadmium yellow and molybdenum-chromium red.
The preparation process of the nanocrystal-based waterborne wood coating comprises the following steps: taking materials; step two, mixing materials; step three, modification; step four, aging resistance; step five, thickening;
in the first step, respectively weighing 62-74 parts of water-based acrylic resin, 47-55 parts of deionized water, 4-6 parts of silane coupling agent KH560, 15-19 parts of cellulose nanocrystals, 6-8 parts of propylene glycol butyl ether, 2-4 parts of polyacrylic acid, 1-3 parts of talcum powder, 5-7 parts of polyethylene glycol, 9-13 parts of anti-aging agent, 5-7 parts of thickening agent, 1-3 parts of defoaming agent and 2-4 parts of coloring agent by weight for later use;
in the second step, the water-based acrylic resin, the deionized water, the propylene glycol butyl ether, the polyacrylic acid and the talcum powder prepared in the first step are poured into a stirrer and stirred until the materials are fully mixed to obtain the water-based paint;
in the third step, the silane coupling agent KH560 and the cellulose nanocrystals prepared in the first step are poured into a stirrer, heated and stirred, and fully mixed with the water-based paint obtained in the second step to obtain a modified paint;
in the fourth step, the modified liquid obtained in the third step is poured into an ultrasonic dispersing agent, polyethylene glycol and an anti-aging agent are added, and the modified liquid is dispersed by ultrasonic vibration until the modified liquid and the anti-aging agent are uniformly mixed to obtain an anti-aging coating;
and in the fifth step, the anti-aging coating obtained in the fourth step is poured into a vacuum defoaming machine, the thickener, the defoamer and the colorant prepared in the first step are added and fully mixed, the mixture is heated and then vacuumized, and the excess water and gas are evaporated into steam to be discharged, so that the water-based wood coating is obtained.
Preferably, in the fourth step, the working frequency of the ultrasonic dispersion machine is 8-13 kHz, and the dispersion time is 5-10 min.
Preferably, in the fifth step, the defoaming temperature of the vacuum defoaming machine is 77-86 ℃, and the defoaming pressure is 0.0012-0.0020 Pa.
Compared with the prior art, the invention has the beneficial effects that: according to the nanocrystal-based waterborne wood coating and the preparation process, the cellulose nanocrystals with high strength and high surface energy and the silane coupling agent KH560 with high reactivity are used for modifying the waterborne acrylic resin, so that the surface strength and the tensile strength of the coating are improved, the rigidity of the coating is improved, the comprehensive performance is stronger, and the use requirements of different scenes are met; the thickening agent is added and vacuum defoaming treatment is carried out, so that residual moisture and gas in the coating are reduced, the viscosity is greatly improved, the surface adhesion is high, the coating is not easy to fall off after coating, and the operation is more reliable; through anti-aging treatment, the coating has ultraviolet resistance and oxidation resistance, the problem of material aging under severe environment is avoided, the chemical stability is good, and the service life of the coating is prolonged.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, the present invention provides a technical solution:
example 1:
the nano crystal-based water-based woodware coating comprises the following formula: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the weight parts of the components are respectively as follows: 62 parts of water-based acrylic resin, 47 parts of deionized water, 4 parts of a silane coupling agent KH560, 15 parts of cellulose nanocrystals, 6 parts of propylene glycol butyl ether, 2 parts of polyacrylic acid, 1 part of talcum powder, 5 parts of polyethylene glycol, 9 parts of an anti-aging agent, 5 parts of a thickening agent, 1 part of an antifoaming agent and 2 parts of a coloring agent, wherein the anti-aging agent is formed by mixing phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide, the weight ratio of phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide is 2: 3: 2: 1, the thickening agent is formed by mixing carrageenan, gelatin and furcellaran, the weight ratio of the carrageenan, gelatin and furcellaran is 1: 3: 1, the antifoaming agent is formed by mixing cyclomethicone, fatty alcohol polyoxyethylene ether and polyethylene glycol siloxane, the weight ratio of the cyclomethicone, the fatty alcohol-polyoxyethylene ether and the polyethylene glycol siloxane is 1: 3: 2, and the colorant is any one or two of pigment carbon black, cobalt blue, titanium dioxide, cadmium yellow and molybdenum-chromium red.
The preparation process of the nanocrystal-based waterborne wood coating comprises the following steps: taking materials; step two, mixing materials; step three, modification; step four, aging resistance; step five, thickening;
in the first step, respectively weighing 62 parts of water-based acrylic resin, 47 parts of deionized water, 4 parts of silane coupling agent KH560, 15 parts of cellulose nanocrystals, 6 parts of propylene glycol butyl ether, 2 parts of polyacrylic acid, 1 part of talcum powder, 5 parts of polyethylene glycol, 9 parts of anti-aging agent, 5 parts of thickening agent, 1 part of defoaming agent and 2 parts of coloring agent according to the parts by weight of the components, and keeping the components for later use;
in the second step, the water-based acrylic resin, the deionized water, the propylene glycol butyl ether, the polyacrylic acid and the talcum powder prepared in the first step are poured into a stirrer and stirred until the materials are fully mixed to obtain the water-based paint;
in the third step, the silane coupling agent KH560 and the cellulose nanocrystals prepared in the first step are poured into a stirrer, heated and stirred, and fully mixed with the water-based paint obtained in the second step to obtain a modified paint;
in the fourth step, the modified liquid obtained in the third step is poured into an ultrasonic dispersing agent, polyethylene glycol and an anti-aging agent are added, and the modified liquid is dispersed for 7min by using 11kHz ultrasonic vibration until the modified liquid and the anti-aging agent are uniformly mixed, so that the anti-aging coating is obtained;
and in the fifth step, the anti-aging coating obtained in the fourth step is poured into a vacuum defoaming machine, the thickener, the defoaming agent and the colorant prepared in the first step are added and fully mixed, the mixture is heated at 82 ℃ and then is vacuumized to 0.0016Pa, and the excess water and gas are evaporated into steam to be discharged, so that the water-based wood coating is obtained.
Example 2:
the nano-crystal based water-borne wood coating comprises the following formula: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the weight parts of the components are respectively as follows: 68 parts of water-based acrylic resin, 51 parts of deionized water, 5 parts of silane coupling agent KH560, 17 parts of cellulose nanocrystals, 6 parts of propylene glycol butyl ether, 3 parts of polyacrylic acid, 2 parts of talcum powder, 6 parts of polyethylene glycol, 11 parts of anti-aging agent, 6 parts of thickening agent, 2 parts of defoaming agent and 3 parts of coloring agent, wherein the anti-aging agent is formed by mixing phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide, the weight ratio of phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide is 2: 3: 2: 1, the thickening agent is formed by mixing carrageenan, gelatin and seaweed gel, the weight ratio of the carrageenan, gelatin and seaweed gel is 1: 3: 1, the defoaming agent is formed by mixing cyclomethicone, fatty alcohol polyoxyethylene ether and polyethylene glycol siloxane, the weight ratio of the cyclomethicone, the fatty alcohol-polyoxyethylene ether and the polyethylene glycol siloxane is 1: 3: 2, and the colorant is any one or two of pigment carbon black, cobalt blue, titanium dioxide, cadmium yellow and molybdenum-chromium red.
The preparation process of the nanocrystal-based waterborne wood coating comprises the following steps: taking materials; step two, mixing materials; step three, modification; step four, ageing resistance; step five, thickening;
in the first step, respectively weighing 68 parts of water-based acrylic resin, 51 parts of deionized water, 5 parts of silane coupling agent KH560, 17 parts of cellulose nanocrystals, 6 parts of propylene glycol butyl ether, 3 parts of polyacrylic acid, 2 parts of talcum powder, 6 parts of polyethylene glycol, 11 parts of anti-aging agent, 6 parts of thickening agent, 2 parts of defoaming agent and 3 parts of coloring agent according to the parts by weight of the components, and keeping the components for later use;
in the second step, the water-based acrylic resin, the deionized water, the propylene glycol butyl ether, the polyacrylic acid and the talcum powder prepared in the first step are poured into a stirrer and stirred until the materials are fully mixed to obtain the water-based paint;
in the third step, the silane coupling agent KH560 and the cellulose nanocrystals prepared in the first step are poured into a stirrer, heated and stirred, and fully mixed with the water-based paint obtained in the second step to obtain a modified paint;
in the fourth step, the modified liquid obtained in the third step is poured into an ultrasonic dispersing agent, polyethylene glycol and an anti-aging agent are added, and the modified liquid is dispersed for 7min by using 11kHz ultrasonic vibration until the modified liquid and the anti-aging agent are uniformly mixed, so that the anti-aging coating is obtained;
and in the fifth step, the anti-aging coating obtained in the fourth step is poured into a vacuum defoaming machine, the thickener, the defoaming agent and the colorant prepared in the first step are added and fully mixed, the mixture is heated at 82 ℃ and then is vacuumized to 0.0016Pa, and the excess water and gas are evaporated into steam to be discharged, so that the water-based wood coating is obtained.
Example 3:
the nano crystal-based water-based woodware coating comprises the following formula: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the weight parts of the components are respectively as follows: 74 parts of water-based acrylic resin, 55 parts of deionized water, 6 parts of silane coupling agent KH560, 19 parts of cellulose nanocrystals, 8 parts of propylene glycol butyl ether, 4 parts of polyacrylic acid, 3 parts of talcum powder, 7 parts of polyethylene glycol, 13 parts of anti-aging agent, 7 parts of thickening agent, 3 parts of defoaming agent and 4 parts of coloring agent, wherein the anti-aging agent is formed by mixing phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide, the weight ratio of phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide is 2: 3: 2: 1, the thickening agent is formed by mixing carrageenan, gelatin and seaweed gel, the weight ratio of the carrageenan, gelatin and seaweed gel is 1: 3: 1, the defoaming agent is formed by mixing cyclomethicone, fatty alcohol polyoxyethylene ether and polyethylene glycol siloxane, the weight ratio of the cyclomethicone, the fatty alcohol-polyoxyethylene ether and the polyethylene glycol siloxane is 1: 3: 2, and the colorant is any one or two of pigment carbon black, cobalt blue, titanium dioxide, cadmium yellow and molybdenum-chromium red.
The preparation process of the nanocrystal-based waterborne wood coating comprises the following steps: taking materials; step two, mixing materials; step three, modification; step four, aging resistance; step five, thickening;
in the first step, 74 parts of water-based acrylic resin, 55 parts of deionized water, 6 parts of silane coupling agent KH560, 19 parts of cellulose nanocrystals, 8 parts of propylene glycol butyl ether, 4 parts of polyacrylic acid, 3 parts of talcum powder, 7 parts of polyethylene glycol, 13 parts of anti-aging agent, 7 parts of thickening agent, 3 parts of defoaming agent and 4 parts of coloring agent are weighed according to the parts by weight of the components for later use;
in the second step, the water-based acrylic resin, the deionized water, the propylene glycol butyl ether, the polyacrylic acid and the talcum powder prepared in the first step are poured into a stirrer and stirred until the materials are fully mixed to obtain the water-based paint;
in the third step, the silane coupling agent KH560 and the cellulose nanocrystals prepared in the first step are poured into a stirrer, heated and stirred, and fully mixed with the water-based paint obtained in the second step to obtain a modified paint;
in the fourth step, the modified liquid obtained in the third step is poured into an ultrasonic dispersing agent, polyethylene glycol and an anti-aging agent are added, and the modified liquid is dispersed for 7min by utilizing 11kHz ultrasonic vibration until the modified liquid and the anti-aging agent are uniformly mixed to obtain an anti-aging coating;
and in the fifth step, the anti-aging coating obtained in the fourth step is poured into a vacuum defoaming machine, the thickener, the defoaming agent and the colorant prepared in the first step are added and fully mixed, the mixture is heated at 82 ℃ and then is vacuumized to 0.0016Pa, and the excess water and gas are evaporated into steam to be discharged, so that the water-based wood coating is obtained.
The physical properties of the waterborne wood coatings obtained in the above embodiments are respectively detected, and compared with the waterborne wood coatings on the market, the obtained results are as follows:
| tensile Strength (N/mm) | Water content (%) | |
| Example 1 | 3.15 | 4.2 |
| Example 2 | 3.22 | 4.5 |
| Example 3 | 3.29 | 4.8 |
| Comparative example | 1.22 | 7.3 |
Based on the above, the invention has the advantages that the water-based acrylic resin is modified by the high-strength high-surface-energy cellulose nanocrystals and the high-reactivity silane coupling agent KH560, so that the surface strength and the tensile strength of the coating are improved, the rigidity of the coating is improved, the comprehensive performance is stronger, the use requirements of different scenes are met, the thickening agent is added, and the vacuum defoaming treatment is carried out, so that the residual moisture and gas in the coating are reduced, the viscosity is greatly improved, the surface adhesion is high, the coating is not easy to fall off after being coated, the work is more reliable, in addition, the coating has the ultraviolet resistance and the oxidation resistance through the anti-aging treatment, the problem of material aging in a severe environment is avoided, the chemical stability is good, and the service life of the coating is prolonged.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The nano crystal-based water-based woodware coating comprises the following formula: the coating comprises water-based acrylic resin, deionized water, a silane coupling agent KH560, cellulose nanocrystals, propylene glycol butyl ether, polyacrylic acid, talcum powder, polyethylene glycol, an anti-aging agent, a thickening agent, a defoaming agent and a coloring agent; the method is characterized in that: the weight parts of the components are respectively as follows: 62-74 parts of water-based acrylic resin, 47-55 parts of deionized water, 4-6 parts of a silane coupling agent KH560, 15-19 parts of cellulose nanocrystals, 6-8 parts of propylene glycol butyl ether, 2-4 parts of polyacrylic acid, 1-3 parts of talcum powder, 5-7 parts of polyethylene glycol, 9-13 parts of an anti-aging agent, 5-7 parts of a thickening agent, 1-3 parts of an antifoaming agent and 2-4 parts of a coloring agent.
2. The nanocrystal-based aqueous wood coating of claim 1, wherein: the anti-aging agent is prepared by mixing phenyl o-hydroxybenzoate, phenylenediamine, resorcinol monobenzoate and dimethylformamide, wherein the weight ratio of the phenyl o-hydroxybenzoate, the phenylenediamine, the resorcinol monobenzoate and the dimethylformamide is 2: 3: 2: 1.
3. The nanocrystal-based aqueous wood coating of claim 1, wherein: the thickening agent is formed by mixing carrageenan, gelatin and seaweed gel, and the weight ratio of the carrageenan, the gelatin and the seaweed gel is 1: 3: 1.
4. The nanocrystal-based aqueous wood coating of claim 1, wherein: the defoaming agent is formed by mixing cyclomethicone, fatty alcohol-polyoxyethylene ether and polyethylene glycol siloxane, and the weight ratio of the cyclomethicone to the fatty alcohol-polyoxyethylene ether to the polyethylene glycol siloxane is 1: 3: 2.
5. The nanocrystal-based aqueous wood coating of claim 1, wherein: the colorant is any one or two of pigment carbon black, cobalt blue, titanium dioxide, cadmium yellow and molybdenum-chromium red.
6. The preparation process of the nanocrystal-based waterborne wood coating comprises the following steps: taking materials; step two, mixing materials; step three, modification; step four, aging resistance; step five, thickening; the method is characterized in that:
in the first step, respectively weighing 62-74 parts of water-based acrylic resin, 47-55 parts of deionized water, 4-6 parts of silane coupling agent KH560, 15-19 parts of cellulose nanocrystals, 6-8 parts of propylene glycol butyl ether, 2-4 parts of polyacrylic acid, 1-3 parts of talcum powder, 5-7 parts of polyethylene glycol, 9-13 parts of anti-aging agent, 5-7 parts of thickening agent, 1-3 parts of defoaming agent and 2-4 parts of coloring agent by weight for later use;
in the second step, the water-based acrylic resin, the deionized water, the propylene glycol butyl ether, the polyacrylic acid and the talcum powder prepared in the first step are poured into a stirrer and stirred until the materials are fully mixed to obtain the water-based paint;
in the third step, the silane coupling agent KH560 and the cellulose nanocrystals prepared in the first step are poured into a stirrer, heated and stirred, and fully mixed with the water-based paint obtained in the second step to obtain a modified paint;
in the fourth step, the modified liquid obtained in the third step is poured into an ultrasonic dispersing agent, polyethylene glycol and an anti-aging agent are added, and the modified liquid is dispersed by ultrasonic vibration until the modified liquid and the anti-aging agent are uniformly mixed to obtain an anti-aging coating;
and in the fifth step, the anti-aging coating obtained in the fourth step is poured into a vacuum defoaming machine, the thickener, the defoamer and the colorant prepared in the first step are added and fully mixed, the mixture is heated and then vacuumized, and the excess water and gas are evaporated into steam to be discharged, so that the water-based wood coating is obtained.
7. The process for preparing the nanocrystal-based waterborne wood coating according to claim 6, wherein: in the fourth step, the working frequency of the ultrasonic dispersion machine is 8-13 kHz, and the dispersion time is 5-10 min.
8. The process for preparing the nanocrystal-based waterborne wood coating according to claim 6, wherein: and in the fifth step, the defoaming temperature of the vacuum defoaming machine is 77-86 ℃, and the defoaming pressure is 0.0012-0.0020 Pa.
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