CN112375481A - Energy-saving environment-friendly water-based UV wood paint and preparation method thereof - Google Patents
Energy-saving environment-friendly water-based UV wood paint and preparation method thereof Download PDFInfo
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- CN112375481A CN112375481A CN202011310287.XA CN202011310287A CN112375481A CN 112375481 A CN112375481 A CN 112375481A CN 202011310287 A CN202011310287 A CN 202011310287A CN 112375481 A CN112375481 A CN 112375481A
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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
- C09D175/04—Polyurethanes
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
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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 an energy-saving environment-friendly water-based UV wood lacquer and a preparation method thereof, and the technical scheme is characterized by comprising the following raw materials in parts by weight: 40-80 parts of waterborne polyurethane resin, 60-120 parts of deionized water, 10-15 parts of nano aluminum oxide, 6-8 parts of modified graphene oxide, 3-9 parts of a cross-linking agent, 4-9 parts of a flatting agent, 3-8 parts of a defoaming agent, 5-20 parts of a thickening agent and 3-7 parts of a photoinitiator. The energy-saving environment-friendly water-based UV wood paint disclosed by the invention solves the problems that the existing water-based paint is easy to foam, is not water-resistant, is easy to strip and is not scratch-resistant, and meanwhile, the leveling of the water-based paint is facilitated.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of high polymer coatings, and particularly relates to an energy-saving environment-friendly water-based UV wood paint and a preparation method thereof.
[ background of the invention ]
The traditional solvent-based wood paint is replaced by the water-based wood paint, the wood furniture using the wood paint is more beautiful and bright, the rough hand feeling of the furniture is improved, the furniture is not influenced by the change of climate and humidity, the effect of protecting and maintaining the wood bamboo furniture is achieved, and the whole family life is more comfortable. The environment-friendly and harmless woodenware paint in the market can not completely realize the environment protection and harmlessness in the preparation or use process, meanwhile, in the process, the photosensitive substances in the components can generate active particles or groups through photochemical reaction to initiate active resin in the system to carry out crosslinking polymerization so as to obtain a hardened paint film, but the paint film has high contractibility, is crisp and difficult to deluster, is easy to form holes, and the waterborne woodenware paint has poor wetting performance on wood due to small surface tension, is not leveled, is difficult to dry and has large residual taste in the manufacturing and construction processes, and can not meet the market demand
[ summary of the invention ]
The invention aims to provide an energy-saving environment-friendly water-based UV wood paint, which solves the problems of easy foaming, no water resistance, easy paint removal and no scratch resistance of the existing water-based paint and is convenient for leveling the water-based paint.
The invention also provides a preparation method of the energy-saving environment-friendly water-based UV wood lacquer.
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 40-80 parts of waterborne polyurethane resin, 60-120 parts of deionized water, 10-15 parts of nano aluminum oxide, 6-8 parts of modified graphene oxide, 3-9 parts of a cross-linking agent, 4-9 parts of a flatting agent, 3-8 parts of a defoaming agent, 5-20 parts of a thickening agent and 3-7 parts of a photoinitiator.
Preferably, the crosslinking agent is a hydroxyalkyl amide crosslinking agent or an epoxy crosslinking agent, the leveling agent is silicon dioxide, and the defoaming agent is a mixture of polyether siloxane copolymer and polydimethylsiloxane according to a ratio of 1: 0.5-1. The matte effect of the paint surface needs micropores and changed particle distribution, the rheological property of the paint is not affected by the scheme, the paint has the low-gloss effect, the elasticity (toughness) and hardness of the paint film are enhanced, and the paint has better adhesive force and weather resistance, so that the low gloss of the paint surface of the product can be kept for a long time. The thickening agent greatly improves the performances of the paint film such as bonding strength, water resistance and the like.
Preferably, the thickener is a mixture of alkali swelling acrylic acid associative thickener and montmorillonite. The alkali swelling acrylic acid association type thickener can effectively improve the viscosity of the paint, is beneficial to the dispersion of graphene and the storage of the paint, improves the leveling of a paint film, and when montmorillonite is dispersed in the water-based paint, polar groups in the system can be attracted by negative charges between montmorillonite layers and inserted into the montmorillonite layers to form a montmorillonite-organic compound with an electric double layer structure, and the montmorillonite-organic compound are combined to generate the optimal thickener effect.
Preferably, the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl acetone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 1-hydroxy ethyl phenyl ketone, and 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide (TPO). In the matte coating, powder lot causes larger paint film layer thickness, a high-efficiency ultraviolet initiator is needed to completely cure, the oligomer and the dispersant in the system are promoted to be rapidly converted from liquid state to solid state, the optical active groups interact, the absorption of light energy can be improved, the activity is increased, the yellowing of the product is overcome to a certain extent, and TPO and the like are preferably used as the photoinitiator.
Preferably, the modified graphene oxide comprises the following raw materials in parts by weight: 20-35 parts of graphene oxide, 40-80 parts of alcohol solvent and 5-12 parts of catalyst.
Preferably, the graphene oxide is a single-layer or multi-layer graphene oxide obtained by strong oxidation of graphite and ultrasonic dispersion stripping. The modified graphene oxide and the aqueous polyurethane resin matrix generate a chemical crosslinking effect, the function well solves the problem that the aqueous polyurethane resin coating is easy to form holes, the compactness of the coating is excellent, the film forming property is improved, and meanwhile, the corrosion resistance of the coating is further improved by utilizing the large-sheet structure of the modified graphene oxide.
Preferably, the coating comprises the following raw materials in parts by weight: 45 parts of waterborne polyurethane resin, 60 parts of deionized water, 13 parts of nano aluminum oxide, 6 parts of modified graphene oxide, 7 parts of a cross-linking agent, 6 parts of a leveling agent, 5 parts of a defoaming agent, 7 parts of a thickening agent and 5 parts of a photoinitiator.
The preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring and heating for reaction for 60-90min, controlling the temperature at 45-60 ℃, then adding deionized water, and emulsifying to obtain an emulsified modified coating;
s4, after emulsification, heating to 60-85 ℃, stirring for 60-120min, synchronously adding a thickening agent and a photoinitiator, ultrasonically dispersing, and carrying out UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
Preferably, in step S22, the reaction environment is at a pressure of 10-60MPa and a temperature of 60-100 ℃.
Preferably, in step S3, the temperature of the emulsification reaction is 40-90 ℃ and the emulsification time is 60-120 min.
Compared with the prior art, the invention has the beneficial effects that:
the energy-saving environment-friendly water-based UV wood lacquer provided by the invention has good matte effect and fluidity, simultaneously has low gloss effect, simultaneously enhances the elasticity (toughness) and hardness of a lacquer film, also has better adhesive force and weather resistance, enables the low gloss of the lacquer surface of a product to be kept for a long time, greatly improves the bonding strength, water resistance and other properties of the lacquer film by adopting the special thickening agent, has complete curing of the lacquer film by using the high-efficiency photoinitiator, promotes the rapid conversion of a low polymer and a dispersing agent in a system from a liquid state to a solid state, has the interaction of an optical active group, can improve the absorption of light energy, increases the activity, and simultaneously overcomes the yellowing property of the product to a certain degree, the modified graphene oxide and the aqueous polyurethane resin matrix have a chemical crosslinking effect, the function well solves the problem that the aqueous polyurethane resin coating is easy to form holes, the compactness of the coating is excellent, the film forming property is improved, and meanwhile, the corrosion resistance of the coating is further improved by utilizing a large-sheet layer structure of the modified graphene oxide, so that the modified graphene oxide is a preferred energy-saving environment-friendly aqueous UV wood lacquer product.
The preparation method of the energy-saving environment-friendly water-based UV wood lacquer is mild in process, free of pollution emission in the process, suitable for industrial production, capable of saving a large amount of electric energy in the drying and curing process by adopting the LED light source for UV curing, and wide in market prospect.
[ detailed description ] embodiments
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 40 parts of waterborne polyurethane resin, 60 parts of deionized water, 10 parts of nano aluminum oxide, 6 parts of modified graphene oxide, 3 parts of a cross-linking agent, 4 parts of a leveling agent, 3 parts of a defoaming agent, 5 parts of a thickening agent and 3 parts of a photoinitiator;
in the embodiment, the crosslinking agent is a hydroxyalkyl amide crosslinking agent, the leveling agent is silicon dioxide, the defoaming agent is a mixture of a polyether siloxane copolymer and polydimethylsiloxane in a ratio of 1:0.5, the thickening agent is a mixture of an alkali swelling acrylic acid associative thickening agent and montmorillonite, and the photoinitiator is a mixture of 1-hydroxycyclohexyl phenyl ketone and 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide;
in this embodiment, the modified graphene oxide includes the following raw materials in parts by weight: 20 parts of graphene oxide, 40 parts of alcohol solvent and 5 parts of catalyst;
the preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished under the condition that the pressure is 10MPa and the temperature is 60 ℃, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring and heating for reaction for 60min, controlling the temperature at 45 ℃, then adding deionized water, controlling the emulsification reaction temperature at 40 ℃ and the emulsification time at 60min, and emulsifying to obtain an emulsified modified coating;
and S4, after emulsification is finished, heating to 60 ℃, stirring for 60min, synchronously adding a thickening agent and a photoinitiator, performing ultrasonic dispersion, and performing UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
Example 2
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 80 parts of waterborne polyurethane resin, 120 parts of deionized water, 15 parts of nano aluminum oxide, 8 parts of modified graphene oxide, 9 parts of a cross-linking agent, 9 parts of a leveling agent, 8 parts of a defoaming agent, 12 parts of a thickening agent and 7 parts of a photoinitiator;
in the embodiment, the cross-linking agent is a hydroxyalkyl amide cross-linking agent, the leveling agent is silicon dioxide, the defoaming agent is a mixture of polyether siloxane copolymer and polydimethylsiloxane in a ratio of 1:1, the thickening agent is a mixture of alkali swelling acrylic acid associative thickening agent and montmorillonite, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-acetone;
in this embodiment, the modified graphene oxide includes the following raw materials in parts by weight: 35 parts of graphene oxide, 80 parts of alcohol solvent and 12 parts of catalyst;
the preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished under the condition that the pressure is 60MPa and the temperature is 100 ℃, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring, heating and reacting for 90min at the temperature of 60 ℃, then adding deionized water, wherein the emulsifying reaction temperature is 90 ℃, the emulsifying time is 120min, and emulsifying to obtain an emulsified modified coating;
and S4, after emulsification is finished, heating to 85 ℃, stirring for 120min, synchronously adding a thickening agent and a photoinitiator, ultrasonically dispersing, and carrying out UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
Example 3
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 30 parts of waterborne polyurethane resin, 40 parts of deionized water, 12 parts of nano aluminum oxide, 6 parts of modified graphene oxide, 6 parts of a cross-linking agent, 5 parts of a leveling agent, 4 parts of a defoaming agent, 16 parts of a thickening agent and 4 parts of a photoinitiator;
in the embodiment, the cross-linking agent is a hydroxyalkyl amide cross-linking agent, the leveling agent is silicon dioxide, the defoaming agent is a mixture of polyether siloxane copolymer and polydimethylsiloxane in a ratio of 1:0.5, the thickening agent is a mixture of alkali swelling acrylic acid associative thickening agent and montmorillonite, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl acetone;
in this embodiment, the modified graphene oxide includes the following raw materials in parts by weight: 20 parts of graphene oxide, 40 parts of alcohol solvent and 5 parts of catalyst;
the preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished under the condition that the pressure is 10MPa and the temperature is 60 ℃, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring and heating for reaction for 60min, controlling the temperature at 45 ℃, then adding deionized water, controlling the emulsification reaction temperature at 40 ℃ and the emulsification time at 60min, and emulsifying to obtain an emulsified modified coating;
and S4, after emulsification is finished, heating to 60 ℃, stirring for 60min, synchronously adding a thickening agent and a photoinitiator, performing ultrasonic dispersion, and performing UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
Example 4
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 60 parts of waterborne polyurethane resin, 80 parts of deionized water, 14 parts of nano aluminum oxide, 7 parts of modified graphene oxide, 8 parts of a cross-linking agent, 8 parts of a leveling agent, 6 parts of a defoaming agent, 20 parts of a thickening agent and 6 parts of a photoinitiator.
In the embodiment, the crosslinking agent is a hydroxyalkyl amide crosslinking agent, the leveling agent is silicon dioxide, the defoaming agent is a mixture of a polyether siloxane copolymer and polydimethylsiloxane in a ratio of 1:1, the thickening agent is a mixture of an alkali swelling acrylic acid association type thickening agent and montmorillonite, and the photoinitiator is 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide;
in this embodiment, the modified graphene oxide includes the following raw materials in parts by weight: 35 parts of graphene oxide, 80 parts of alcohol solvent and 12 parts of catalyst;
the preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished under the condition that the pressure is 60MPa and the temperature is 100 ℃, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring, heating and reacting for 90min at the temperature of 60 ℃, then adding deionized water, wherein the emulsifying reaction temperature is 90 ℃, the emulsifying time is 120min, and emulsifying to obtain an emulsified modified coating;
and S4, after emulsification is finished, heating to 85 ℃, stirring for 120min, synchronously adding a thickening agent and a photoinitiator, ultrasonically dispersing, and carrying out UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
Example 5
An energy-saving environment-friendly water-based UV wood lacquer comprises the following raw materials in parts by weight: 45 parts of waterborne polyurethane resin, 60 parts of deionized water, 13 parts of nano aluminum oxide, 6 parts of modified graphene oxide, 7 parts of a cross-linking agent, 6 parts of a leveling agent, 5 parts of a defoaming agent, 18 parts of a thickening agent and 5 parts of a photoinitiator.
In the embodiment, the crosslinking agent is a hydroxyalkyl amide crosslinking agent, the leveling agent is silicon dioxide, the defoaming agent is a mixture of a polyether siloxane copolymer and polydimethylsiloxane in a ratio of 1:1, the thickening agent is a mixture of an alkali swelling acrylic acid associative thickening agent and montmorillonite, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl acetone and 2-hydroxy-2-methyl-1-phenyl-1-acetone;
in this embodiment, the modified graphene oxide includes the following raw materials in parts by weight: 30 parts of graphene oxide, 60 parts of alcohol solvent and 10 parts of catalyst;
the preparation method of the energy-saving environment-friendly water-based UV wood lacquer comprises the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished under the condition that the pressure is 30MPa and the temperature is 80 ℃, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring, heating and reacting for 80min, controlling the temperature at 50 ℃, then adding deionized water, controlling the emulsification reaction temperature at 60 ℃ and the emulsification time at 80min, and emulsifying to obtain an emulsified modified coating;
and S4, after emulsification is finished, heating to 70 ℃, stirring for 100min, synchronously adding a thickening agent and a photoinitiator, performing ultrasonic dispersion, and performing UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
The results of actual tests performed on the products obtained in the above examples are as follows:
table 1: test data
Table 2: test data 2
The invention uses the water-based polyurethane resin, deionized water, nano-alumina, modified graphene oxide, a thickening agent and a photoinitiator as coating raw materials, and is matched with a special preparation method, so that the obtained energy-saving environment-friendly water-based UV wood lacquer has good matt effect and fluidity, simultaneously has a low-gloss effect, simultaneously enhances the elasticity (toughness) and hardness of a lacquer film, also has better adhesive force and weather resistance, enables the low gloss of the lacquer surface of a product to be kept for a long time, adopts the special thickening agent to greatly improve the adhesive strength, water resistance and other properties of the lacquer film, adopts the high-efficiency photoinitiator to completely solidify the lacquer film, promotes the oligomer and the dispersing agent in a system to be rapidly converted from liquid state to solid state, has the mutual action of optical active groups, can improve the absorption of light energy, increases the activity, simultaneously overcomes the yellowing property of the product to a certain degree, and the modified graphene oxide and the water-based polyurethane resin matrix, the function well solves the problem that the waterborne polyurethane resin coating is easy to form holes, so that the compactness of the coating is excellent, the film forming property is improved, meanwhile, the corrosion resistance of the coating is further improved by utilizing the large-sheet layer structure of the modified graphene oxide, the flexibility of a paint film is better, and the modified graphene oxide waterborne UV wood paint is a preferred energy-saving and environment-friendly waterborne UV wood paint product.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. An energy-saving environment-friendly water-based UV wood lacquer is characterized by comprising the following raw materials in parts by weight: 40-80 parts of waterborne polyurethane resin, 60-120 parts of deionized water, 10-15 parts of nano aluminum oxide, 6-8 parts of modified graphene oxide, 3-9 parts of a cross-linking agent, 4-9 parts of a leveling agent, 3-8 parts of a defoaming agent, 5-20 parts of a thickening agent and 3-7 parts of a photoinitiator.
2. The energy-saving environment-friendly water-based UV wood lacquer according to claim 1, wherein the cross-linking agent is a hydroxyalkyl amide cross-linking agent or an epoxy cross-linking agent, the leveling agent is silicon dioxide, and the defoaming agent is a mixture of polyether siloxane copolymer and polydimethylsiloxane.
3. The energy-saving environment-friendly water-based UV wood lacquer according to claim 1, wherein the thickener is a mixture of alkali swelling acrylic acid associative thickener and montmorillonite.
4. The energy-saving environment-friendly water-based UV wood lacquer according to claim 1, wherein the photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenyl acetone, 2-hydroxy-2-methyl-1-phenyl-1-acetone, 1-hydroxy ethyl phenyl ketone, and 2, 4, 6-trimethylbenzoyl-diphenylphosphine oxide.
5. The energy-saving environment-friendly water-based UV wood lacquer according to claim 1, wherein the modified graphene oxide comprises the following raw materials in parts by weight: 20-35 parts of graphene oxide, 40-80 parts of alcohol solvent and 5-12 parts of catalyst.
6. The energy-saving environment-friendly water-based UV wood lacquer according to claim 5, wherein the graphene oxide is a single-layer or multi-layer graphene oxide obtained by strong oxidation of graphite and ultrasonic dispersion stripping.
7. The energy-saving environment-friendly water-based UV wood lacquer according to claim 1, wherein the coating comprises the following raw materials in parts by weight: 45 parts of waterborne polyurethane resin, 60 parts of deionized water, 13 parts of nano aluminum oxide, 6 parts of modified graphene oxide, 7 parts of a cross-linking agent, 6 parts of a leveling agent, 5 parts of a defoaming agent, 7 parts of a polyurethane thickening agent and 5 parts of a photoinitiator.
8. The preparation method of the energy-saving environment-friendly water-based UV wood lacquer as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
s1, weighing the raw materials in parts by weight;
s2, preparing modified graphene oxide:
s21, dispersing graphene oxide in an alcohol solvent, stirring and dispersing uniformly, and adding a catalyst to obtain a dispersion liquid;
s22, replacing air in the reactor with carbon dioxide through gas replacement, adding the dispersion liquid, stirring for reaction, cooling to room temperature after the reaction is finished, slowly removing the gas, filtering to remove the catalyst and the solvent, and centrifuging and washing to obtain modified graphene oxide;
s3, adding the waterborne polyurethane resin, the nano-alumina and the modified graphene oxide into a reaction kettle, synchronously adding the cross-linking agent, the leveling agent and the defoaming agent, stirring and heating for reaction for 60-90min, controlling the temperature at 45-60 ℃, then adding deionized water, and emulsifying to obtain an emulsified modified coating;
s4, after emulsification, heating to 60-85 ℃, stirring for 60-120min, synchronously adding a polyurethane thickener and a photoinitiator, ultrasonically dispersing, and carrying out UV curing through an LED light source to obtain the energy-saving environment-friendly water-based UV wood lacquer.
9. The method for preparing energy-saving environment-friendly water-based UV wood lacquer according to claim 8, wherein in step S22, the reaction environment is at a pressure of 10-60MPa and a temperature of 60-100 ℃.
10. The method for preparing energy-saving environment-friendly water-based UV wood lacquer according to claim 8, wherein in step S3, the temperature of the emulsification reaction is 40-90 ℃ and the emulsification time is 60-120 min.
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