CN112480805A - Novel water-based ultraviolet-curing wear-resistant coating and preparation method and use method thereof - Google Patents
Novel water-based ultraviolet-curing wear-resistant coating and preparation method and use 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
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- C09D7/20—Diluents or solvents
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The application provides a novel water-based ultraviolet-curing wear-resistant coating, and a preparation method and a use method thereof, wherein the novel water-based ultraviolet-curing wear-resistant coating comprises the following components: 20-25 parts of ten-functionality waterborne polyurethane acrylate, 35-50 parts of two-functionality waterborne polyurethane acrylate, 14-23 parts of nano composite filler, 25-35 parts of waterborne mixed diluent, 0.4-0.8 part of polymerization inhibitor, 3-5 parts of dispersant, 0.3-0.5 part of defoaming agent, 0.3-0.5 part of flatting agent, 2-4 parts of co-initiator and 4-8 parts of photoinitiator; the nano composite filler is composed of fumed silica, nano alumina and nano glass powder, the polymerization inhibitor is xanthan gum, guar gum and sodium alginate, and after the nano composite filler is coated on a wood floor, a paint film is dried uniformly without whitening and cracking phenomena, a high-mesh structure is formed after drying, the nano composite filler has high wear resistance and high adhesion, and meanwhile, the nano composite filler is excellent in anti-settling effect and excellent in storage stability, and can prolong the storage time of the coating.
Description
Technical Field
The invention belongs to the technical field of water-based coatings, and particularly relates to a novel water-based ultraviolet-curable wear-resistant coating, and a preparation method and a use method thereof.
Background
The ultraviolet curing coating in the current market is basically an oily ultraviolet curing coating, wherein most of wear-resistant coatings are made of polyurethane acrylate, epoxy acrylate and ceramic powder or aluminum oxide, and have the advantages of high hardness and good wear resistance. The paint film of the oil-based polyurethane acrylate and the epoxy acrylate has the defects of high paint film shrinkage, brittleness, poor wear resistance, poor adhesion, poor paint liquid sinking resistance due to the addition of more wear-resistant materials, poor paint film transparency and the like, so that the market demand cannot be met. The few water-based ultraviolet curing coatings on the market also have the problems of low solid content, poor filling, easy whitening of a paint film, no water resistance, no wear resistance, no scratch resistance and the like.
Disclosure of Invention
The invention provides a novel aqueous ultraviolet-curing wear-resistant coating, aiming at solving the technical problems of poor wear resistance, poor adhesion and poor anti-settling property of the existing coating.
The invention also aims to provide a preparation method of the novel water-based ultraviolet-curable wear-resistant coating.
The third purpose of the invention is to provide a use method of the novel water-based ultraviolet-curing wear-resistant coating.
A novel water-based ultraviolet-curing wear-resistant coating comprises the following components in parts by weight:
the nano composite filler is prepared from fumed silica, nano alumina and nano glass powder in a weight ratio of 11-18: 3-5: 2-4.
The novel aqueous ultraviolet curing wear-resistant coating takes ten-functionality aqueous polyurethane acrylate and two-functionality aqueous polyurethane acrylate as main bodies to form an aqueous dispersion system with a cross-linked structure, the ten-functionality aqueous polyurethane acrylate contains a large number of urethane bonds which are beneficial to forming hydrogen bonds between macromolecular chains, the cross-linking density and the film forming speed of a coating film are improved, the coating system is endowed with good wear resistance and adhesion, the two-functionality aqueous polyurethane acrylate is used for improving the flexibility of the coating system and the adhesion of the coating film, the problems of cracks and yellowing of the coating film are avoided, an aqueous mixed diluent is used as a solvent to adjust the viscosity and accelerate the cross-linking reaction curing, a nano composite filler is used as a modified material, wherein fumed silica can change the curve shape rheology and improve the viscosity under low shear rate, the nano alumina improves the fluidity of the material and the wear resistance of the paint, the nano glass powder improves the transparency of the paint, the nano composite filler has small particle size, good dispersibility and anti-settling effect, the polymerization inhibitor can efficiently control the leveling property, stability and settling property of a water-based paint system, so that the water-based paint has excellent storage stability, shows anti-sagging performance in construction application and improves the adhesion of a product, and then combines a dispersing agent, a defoaming agent, a leveling agent, an initiator aid and a photoinitiator to initiate a monomer to carry out a crosslinking reaction. After drying, a high-mesh structure is formed, the coating has high wear resistance and high adhesion, and simultaneously has excellent anti-settling effect and excellent storage stability, and the storage time of the coating can be prolonged.
Preferably, the ten-functional waterborne polyurethane acrylate is 10-functional hydroxyl-containing low-viscosity aliphatic polyurethane acrylate, and the solid content is 100%. The waterborne polyurethane acrylate is preferably Guangdong Boxing type B-912, has viscosity of 9000-13000cps/60 ℃, refractive index of 1.498 +/-0.005, high curing speed and good toughness, has relatively balanced hardness and flexibility, has good transparency, surface leveling effect and glossiness in appearance, has good adhesion performance to wood, and can be used for improving wear resistance, wherein the ten-functionality waterborne polyurethane acrylate accounts for 20-25 parts by weight, when the content of the ten-functionality waterborne polyurethane acrylate is less than 20 parts, the problem of poor curing performance and heat resistance of a coating film exists, and on the contrary, when the content of the ten-functionality waterborne polyurethane acrylate exceeds 25 parts, the problem of cracks and yellowing in the coating film can be caused due to excessive curing density.
Preferably, the difunctional waterborne polyurethane acrylate is hydroxyl-containing difunctional aliphatic urethane acrylate, and the solid content is 100%. The polyurethane coating is preferably Guangdong Boxing type B-210D, has viscosity of 9000-13000cps/60 ℃, has refractive index of 1.482 +/-0.005, is a two-functionality PUA resin, has medium molecular weight, high curing speed, low heat release and good toughness, is colorless transparent viscous liquid for improving adhesive force and transparency by adjusting the hardness and flexibility of a formula in the coating, is 35-50 parts of the two-functionality waterborne polyurethane acrylate in the application, is more preferably 40-45 parts of the two-functionality waterborne polyurethane acrylate, has weak adhesion when the addition is less than 35 parts, influences the curing property of a coating film, and has the problem of cracking because the addition is more than 50 parts.
Preferably, the polymerization inhibitor is one or any combination of xanthan gum, guar gum and sodium alginate. The addition of the polymerization inhibitor is beneficial to improving the settleability, rheological property and vertical surface of the coating, and provides good fluid thixotropy for the coating. The water-based coating is preferably compounded with xanthan gum and guar gum, the guar gum has low-price and high-efficiency emulsification and thickening properties, the xanthan gum has a hard rod shape in a solution, the leveling property, the stability and the settleability of a water-based coating system can be efficiently controlled, the xanthan gum and the guar gum are compounded to form gel, a synergistic effect can be generated, the water-based coating has the characteristic of high viscosity under low shearing force, and the water-based coating also has suspension property, high pseudoplastic flow, excellent high-temperature acid-base stability and tolerance to other auxiliaries, can effectively control the diffusivity of the coating during coating, can effectively prevent flow collapse, has excellent rheological control performance, enables the water-based coating to have excellent storage stability, and shows anti-sagging property in construction application.
Preferably, the fumed silica is fumed silica micro powder with fineness of 12-16 microns; the coating adopts fumed silica micropowder of 12-16 microns, the particle size is too small and is easy to settle to influence the storage performance of the coating, the particle size is too large and is not easy to disperse and cause brittleness, the shape of the rheological curve of micron-sized spherical fumed silica micropowder can be changed, the viscosity under low shear rate is improved, compared with the traditional thickening agent and a rheological control agent, the coating shows excellent rheological performance, the coating has an anti-settling effect, consolidation is prevented, fluidity is improved, good anti-sagging effect is kept under various construction conditions, the coating can be quickly and completely dispersed in the aqueous coating, and extra process steps (such as grinding) are reduced for helping enterprises, so that the production process is quicker and more efficient, and better rheological efficiency is given to the coating product.
The nano alumina is hydrophilic nano alumina micro powder with the fineness of 12-16 microns; the high-hardness transparent ceramic-resistant wear-resistant varnish can be formed, the flowability of materials is improved, the wear resistance of the coating is improved, the nano aluminum oxide is 12-16 micrometers, the adhesion of the coating is affected due to the fact that the particle size is too small and easy to settle, and the coating is too large and not easy to disperse and easy to dry crack.
The nano glass powder is nano lead-free glass powder with the fineness of 2-5 microns. The superfine glass powder is a high-quality neutral inorganic filler, has strong dispersibility and can be uniformly dispersed in various materials. After the nano transparent glass powder is added into the weather-resistant coating, the hardness, wear resistance and scratch resistance coefficient of a paint film of the coating can be increased.
Preferably, the aqueous mixed diluent is prepared by mixing 2-hydroxyethyl methacrylate and polyethylene glycol diacrylate according to the weight ratio of 5-7: 3-5. The advantages are that: the aqueous mixed diluent not only regulates viscosity, photocuring speed and photopolymerization degree, but also participates in the photocuring process, and 2-hydroxyethyl methacrylate and polyethylene glycol diacrylate are mixed according to a specific proportion, so that the UV curing agent has the characteristics of high UV curing speed and high crosslinking density. The 2-hydroxyethyl methacrylate plays a role of a stabilizer in the coating, prevents the coating from being gelled, prolongs the storage time of the coating, and the polyethylene glycol diacrylate plays a role in dissolving, adjusting the drying time of the coating, reducing the surface tension and helping to form a film. Preferably, the aqueous mixed diluent is 2-hydroxyethyl methacrylate and polyethylene glycol diacrylate according to the weight ratio of 7: 3 parts by weight, the aqueous mixing diluent of the present invention is 25 to 35 parts, and when the content is less than 25 parts, workability and leveling property may be deteriorated, whereas when the content exceeds 35 parts, formation of a coating film is easily reduced.
Preferably, the photoinitiator is prepared from a photoinitiator A and a photoinitiator B according to the weight ratio of 2-4: 2-4; the photoinitiator A is 2-hydroxy-2-methyl-1-phenyl acetone or 2-hydroxy-2-methyl-1-phenyl-1-acetone; the photoinitiator B is 1-hydroxycycloethylphenyl ketone or 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide. The application uses a cracking type photoinitiator, and adopts a compound photoinitiator A and a compound photoinitiator B for initiating polymer crosslinking.
Preferably, the co-initiator is one of tertiary amine acrylate, alkyl hydroxylamine and dimethylaminobenzoate; preferably, the tertiary amine acrylate is a transparent liquid.
The dispersing agent is a copolymer containing 100% of solid acid groups; the dispersant has the function of improving the compatibility between the nano composite filler and the monomer mixed slurry in the process of preparing the nano composite filler and the monomer mixed slurry, so that the nano composite filler can be uniformly dispersed in the coating.
The defoaming agent is polyether polysiloxane transparent liquid with solid content of 100%; is added for improving the adhesion of the coating film.
The leveling agent is polyether modified polydimethylsiloxane containing 100% of solid content. The leveling agent has the advantages of strong surface tension reduction, excellent shrinkage resistance, good substrate wetting and elevation leveling promotion, so that the coating is uniform and flat.
The preparation method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
1) sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 1/2-2/3 parts by weight of waterborne mixed reactive diluent, dispersant and nano-composite filler at the rotating speed of 300-450 r/min, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest of the aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under the stirring at the rotating speed of 300-450 revolutions per minute, and stirring at the rotating speed of 700-900 revolutions per minute for 10-15 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 10-15 minutes at the rotating speed of 700-900 rpm, adding a polymerization inhibitor, stirring for 10-15 minutes at the rotating speed of 300-450 rpm, and filtering to remove impurities to obtain the novel waterborne ultraviolet curing wear-resistant coating.
The application method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 45-50 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished and smoothed by No. 240 abrasive paper, the wood floor is roll-coated on the wood floor by a roller coater according to the coating thickness of 20-25 g/square meter, and the wood floor is put into an ultraviolet curing machine for 3-5 seconds to be dried.
Compared with the prior art, the invention has the following advantages:
the novel aqueous ultraviolet curing wear-resistant coating takes ten-functionality aqueous polyurethane acrylate and two-functionality aqueous polyurethane acrylate as main bodies to form an aqueous dispersion system with a cross-linked structure, the ten-functionality aqueous polyurethane acrylate contains a large number of urethane bonds which are beneficial to forming hydrogen bonds between macromolecular chains, the cross-linking density and the film forming speed of a coating film are improved, the coating system is endowed with good wear resistance and adhesion, the two-functionality aqueous polyurethane acrylate is used for improving the flexibility of the coating system and the adhesion of the coating film, the problems of cracks and yellowing of the coating film are avoided, an aqueous mixed diluent is used as a solvent to adjust the viscosity and accelerate the cross-linking reaction curing, a nano composite filler is used as a modified material, wherein fumed silica can change the curve shape rheology and improve the viscosity under low shear rate, the nano alumina improves the fluidity of the material and the wear resistance of the paint, the nano glass powder improves the transparency of the paint, the nano composite filler has small particle size, good dispersibility and anti-settling effect, the polymerization inhibitor can efficiently control the leveling property, stability and settling property of a water-based paint system, so that the water-based paint has excellent storage stability, shows anti-sagging performance in construction application and improves the adhesion of a product, and then combines a dispersing agent, a defoaming agent, a leveling agent, an initiator aid and a photoinitiator to initiate a monomer to carry out a crosslinking reaction. After drying, a high-mesh structure is formed, the coating has high wear resistance and high adhesion, and simultaneously has excellent anti-settling effect and excellent storage stability, and the storage time of the coating can be prolonged.
The preparation method of the novel water-based ultraviolet curing wear-resistant paint has the advantages of being simple to process and low in cost, the prepared novel water-based ultraviolet curing wear-resistant paint is applied to floor paint, and has the characteristics of super wear resistance and high adhesive force.
The application method of the novel water-based ultraviolet-curing wear-resistant coating has the advantages that a paint film forms a high-mesh structure after being dried, the coating is not easy to age, is flexible and firm, is friction-resistant, and can be controlled to enable the water-based coating to have excellent storage stability, and show anti-sagging performance in construction application, so that a machine pipeline cannot be plugged due to precipitation or thickening when in use, no volatile pungent smell exists, the coating cannot be irritated in the process of heating at 40-50 ℃, and eyes cannot be irritated to the safety protection performance of constructors.
Detailed Description
The following is a detailed description of the present invention:
the specific technical scheme of the invention is illustrated by combining specific examples 1-4:
example 1:
the preparation method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
1) weighing the components according to the weight of the components in the table 1, sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 1/2 parts by weight of waterborne mixed active diluent, dispersant and nano-composite filler at the rotating speed of 450 revolutions per minute, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under the stirring at the rotating speed of 450 revolutions per minute, and stirring at the rotating speed of 700 revolutions per minute for 15 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 15 minutes at the rotating speed of 700 r/min, adding a polymerization inhibitor, stirring for 10 minutes at the rotating speed of 450 r/min, and filtering to remove impurities to obtain the novel waterborne ultraviolet curing wear-resistant coating.
The application method of the prepared novel water-based ultraviolet-curing wear-resistant paint is used for coating test, and comprises the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 45 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished to be smooth by No. 240 abrasive paper, the coating is rolled on the wood floor by a roller coater according to the coating thickness of 20 g/square meter, and the wood floor is put into an ultraviolet curing machine for 5 seconds to be dried.
Example 2:
the preparation method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
1) weighing the components according to the weight of the components in the table 1, sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 1/2 parts by weight of waterborne mixed active diluent, dispersant and nano-composite filler at the rotating speed of 300 r/min, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under the stirring at the rotating speed of 300 revolutions per minute, and stirring at the rotating speed of 800 revolutions per minute for 12 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 12 minutes at the rotating speed of 800 r/min, adding a polymerization inhibitor, stirring for 15 minutes at the rotating speed of 300 r/min, and filtering to remove impurities to obtain the novel waterborne ultraviolet curing wear-resistant coating.
The application method of the prepared novel water-based ultraviolet-curing wear-resistant paint is used for coating test, and comprises the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 50 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished to be smooth by No. 240 abrasive paper, the coating is rolled on the wood floor by a roller coater according to the coating thickness of 25 g/square meter, and the wood floor is put into an ultraviolet curing machine for 3 seconds to be dried.
Example 3:
the preparation method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
1) weighing the components according to the weight of the components in the table 1, sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 2/3 parts by weight of waterborne mixed active diluent, dispersant and nano-composite filler at the rotating speed of 400 r/min, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under the stirring at the rotating speed of 400 revolutions per minute, and stirring at the rotating speed of 900 revolutions per minute for 10 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 10 minutes at the rotation speed of 900 revolutions per minute, adding a polymerization inhibitor, stirring for 12 minutes at the rotation speed of 400 revolutions per minute, and filtering to remove impurities to obtain the novel waterborne ultraviolet curing wear-resistant coating.
The application method of the prepared novel water-based ultraviolet-curing wear-resistant paint is used for coating test, and comprises the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 48 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished to be smooth by No. 240 abrasive paper, the coating is rolled on the wood floor by a roller coater according to the coating thickness of 22 g/square meter, and the wood floor is put into an ultraviolet curing machine for drying for 4 seconds.
Example 4:
the preparation method of the novel water-based ultraviolet-curing wear-resistant coating comprises the following steps:
1) weighing the components according to the weight of the components in the table 1, sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 2/3 parts by weight of waterborne mixed active diluent, dispersant and nano-composite filler at the rotating speed of 350 r/min, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under stirring at the rotating speed of 350 revolutions per minute, and stirring at the rotating speed of 900 revolutions per minute for 14 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 14 minutes at the rotation speed of 900 rpm, adding a polymerization inhibitor, stirring for 14 minutes at the rotation speed of 350 rpm, and filtering to remove impurities to obtain the novel waterborne ultraviolet-curing wear-resistant coating.
The application method of the prepared novel water-based ultraviolet-curing wear-resistant paint is used for coating test, and comprises the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 50 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished to be smooth by No. 240 abrasive paper, the coating is rolled on the wood floor by a roller coater according to the coating thickness of 23 g/square meter, and the wood floor is put into an ultraviolet curing machine for 3 seconds to be dried.
Table 1: the weight ratio of each component in the embodiments 1-4 is as follows:
the water-based UV coatings of examples 1 to 4 were subjected to physical and chemical property tests including appearance, hardness, abrasion resistance, adhesion, cold and heat resistance, and storage stability tests, and the test results are shown in table 2.
The storage stability test method is as follows:
(1) viscosity: testing product initial KU viscosity η using stormer viscometer1；
(2) Storage stability: the coatings were stored at 25 ℃ and 50 ℃ for 7 days, respectively, and the KU viscosity η of the product was tested using a stormer viscometer2Comparing with the initial viscosity to obtain the storage stability coefficient k ═ eta [ [ eta ] ]2/η1*100％。
Table 2: results of physical and chemical properties test
According to the experimental data, the novel water-based ultraviolet-curing wear-resistant coating prepared by the embodiment of the application has excellent wear resistance and adhesion, is light milky thin liquid and has good transparency, and meanwhile, the storage stability coefficient can be known. The novel aqueous ultraviolet curing wear-resistant coating takes ten-functionality aqueous polyurethane acrylate and two-functionality aqueous polyurethane acrylate as main bodies to form an aqueous dispersion system with a cross-linked structure, the ten-functionality aqueous polyurethane acrylate contains a large number of urethane bonds which are beneficial to forming hydrogen bonds between macromolecular chains, the cross-linking density and the film forming speed of a coating film are improved, the coating system is endowed with good wear resistance and adhesion, the two-functionality aqueous polyurethane acrylate is used for improving the flexibility of the coating system and the adhesion of the coating film, the problems of cracks and yellowing of the coating film are avoided, an aqueous mixed diluent is used as a solvent to adjust the viscosity and accelerate the cross-linking reaction curing, a nano composite filler is used as a modified material, wherein fumed silica can change the curve shape rheology and improve the viscosity under low shear rate, the nano alumina improves the fluidity of the material and the wear resistance of the paint, the nano glass powder improves the transparency of the paint, the nano composite filler has small particle size, good dispersibility and anti-settling effect, the polymerization inhibitor can efficiently control the leveling property, stability and settling property of a water-based paint system, so that the water-based paint has excellent storage stability, shows anti-sagging performance in construction application and improves the adhesion of a product, and then combines a dispersing agent, a defoaming agent, a leveling agent, an initiator aid and a photoinitiator to initiate a monomer to carry out a crosslinking reaction. After drying, a high-mesh structure is formed, the coating has high wear resistance and high adhesion, and simultaneously has excellent anti-settling effect and excellent storage stability, and the storage time of the coating can be prolonged.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A novel water-based ultraviolet-curing wear-resistant coating is characterized in that: the composition consists of the following substances in parts by weight:
the nano composite filler is prepared from fumed silica, nano alumina and nano glass powder in a weight ratio of 11-18: 3-5: 2-4.
2. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the ten-functionality-degree water-based urethane acrylate is 10-functionality-degree low-viscosity aliphatic urethane acrylate containing hydroxyl groups, and the solid content is 100%.
3. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the difunctional waterborne polyurethane acrylate is hydroxyl-containing difunctional aliphatic urethane acrylate, and the solid content is 100%.
4. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the polymerization inhibitor is one or any combination of xanthan gum, guar gum and sodium alginate.
5. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the fumed silica is fumed silica micro powder with fineness of 12-16 microns;
the nano alumina is hydrophilic nano alumina micro powder with the fineness of 12-16 microns;
the nano glass powder is nano lead-free glass powder with the fineness of 2-5 microns.
6. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the aqueous mixed diluent is prepared by mixing methacrylic acid-2-hydroxyethyl ester and polyethylene glycol diacrylate according to the weight ratio of 5-7: 3-5.
7. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the photoinitiator is prepared from a photoinitiator A and a photoinitiator B according to the weight ratio of 2-4: 2-4;
the photoinitiator A is 2-hydroxy-2-methyl-1-phenyl acetone or 2-hydroxy-2-methyl-1-phenyl-1-acetone;
the photoinitiator B is 1-hydroxycycloethylphenyl ketone or 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide.
8. The novel aqueous ultraviolet-curable wear-resistant coating according to claim 1, wherein: the auxiliary initiator is one of tertiary amine acrylate, alkyl hydroxylamine and dimethylaminobenzoate;
the dispersing agent is a copolymer containing 100% of solid acid groups;
the defoaming agent is polyether polysiloxane transparent liquid with solid content of 100%;
the leveling agent is polyether modified polydimethylsiloxane containing 100% of solid content.
9. A method for preparing the novel aqueous ultraviolet-curing wear-resistant coating according to any one of claims 1 to 8, which is characterized by comprising the following steps:
1) sequentially adding ten-functionality-degree waterborne polyurethane acrylate, 1/2-2/3 parts by weight of waterborne mixed reactive diluent, dispersant and nano-composite filler at the rotating speed of 300-450 r/min, and uniformly mixing and stirring;
2) sequentially adding and mixing the rest of the aqueous mixed active diluent, the defoaming agent, the flatting agent, the photoinitiator and the initiator aid under the stirring at the rotating speed of 300-450 revolutions per minute, and stirring at the rotating speed of 700-900 revolutions per minute for 10-15 minutes to obtain an initial-stage mixture;
3) adding bifunctional waterborne polyurethane acrylate into the initial-stage mixture, stirring for 10-15 minutes at the rotating speed of 700-900 rpm, adding a polymerization inhibitor, stirring for 10-15 minutes at the rotating speed of 300-450 rpm, and filtering to remove impurities to obtain the novel waterborne ultraviolet curing wear-resistant coating.
10. Use of the novel aqueous uv-curable abrasion resistant coating according to any of claims 1 to 8, characterized by comprising the following steps:
the components are mixed and stirred uniformly step by step, the mixture is filtered and then added into a heating barrel, the temperature of the coating is increased to 45-50 ℃, the temperature of the coating is uniform and is favorable for defoaming, after the wood floor is polished and smoothed by No. 240 abrasive paper, the wood floor is roll-coated on the wood floor by a roller coater according to the coating thickness of 20-25 g/square meter, and the wood floor is put into an ultraviolet curing machine for 3-5 seconds to be dried.
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