CN110358437B - High-performance environment-friendly water-based paint and preparation method thereof - Google Patents
High-performance environment-friendly water-based paint and preparation method thereof Download PDFInfo
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- CN110358437B CN110358437B CN201910531569.3A CN201910531569A CN110358437B CN 110358437 B CN110358437 B CN 110358437B CN 201910531569 A CN201910531569 A CN 201910531569A CN 110358437 B CN110358437 B CN 110358437B
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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
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- C09D5/08—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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention discloses a high-performance environment-friendly water-based paint which is prepared from the following raw materials in parts by weight: 500-1000 parts of aqueous resin dispersion, 100-200 parts of deionized water, 5-15 parts of additive, 28-56 parts of film forming additive, 5-30 parts of defoaming agent, 1-20 parts of thickening agent and 3-10 parts of dispersing agent. The water-based paint provided by the invention has excellent comprehensive properties such as acid and alkali resistance, wear resistance, strength and the like, and meanwhile, the water-based paint has good construction latitude, the surface of a paint film of a coated object is glossy and flat, various defects are not easy to occur, and the water-based paint has environmental protection performance and is more beneficial to large-scale popularization and application. The invention also discloses a preparation method of the high-performance environment-friendly water-based paint.
Description
Technical Field
The invention relates to the technical field of water-based paint, in particular to high-performance environment-friendly water-based paint and a preparation method thereof.
Background
Along with the pressure of the environmental protection policy, the environmental protection consciousness of consumers is continuously improved, the VOC emission limit standard is especially brought out in provinces and cities all over the country, and the development of environment-friendly coatings such as non-solvent type coatings, water-based paints and the like is encouraged to bring opportunities. Although traditional coatings still occupy a large market share, water-based paints are green industry and are the direction of future development of paints.
The water paint takes water as a solvent, so that a large amount of resources are saved; the fire hazard during construction is eliminated; the air pollution is reduced; the working environment condition is improved; the coating tool can be cleaned by water, so that the consumption of cleaning solvent is greatly reduced, and the damage to constructors is effectively reduced. However, the water-based paint has high requirements on the construction process and the surface cleanliness of the material because the surface tension of water is high; in addition, the existing water paint has the advantages of good water resistance and weather resistance, but the comprehensive performance is general.
In view of the above, it is desirable to provide a high-performance environment-friendly water-based paint, which has better construction latitude while improving the comprehensive performance.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide the high-performance environment-friendly water-based paint and the preparation method thereof, aiming at the problems of insufficient comprehensive performance and poor construction tolerance of the water-based paint, so that the acid and alkali resistance, the wear resistance and the strength of the water-based paint are improved, the water-based paint has good construction tolerance, various defects on the surface of a paint film of a coated object are prevented, and the large-scale popularization and application are facilitated.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the high-performance environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 500-1000 parts of aqueous resin dispersion, 100-200 parts of deionized water, 5-15 parts of additive, 28-56 parts of film forming additive, 5-30 parts of defoaming agent, 1-20 parts of thickening agent and 3-10 parts of dispersing agent.
Preferably, the aqueous resin dispersion is at least one of a copolymer of modified polyurethane and acrylic acid, a copolymer of modified polyurethane and acrylic acid derivative, a blend of modified polyurethane and acrylic acid, and a blend of modified polyurethane and acrylic acid derivative.
Preferably, the modified polyurethane is modified polyhedral oligomeric silsesquioxane polyurethane containing ionic liquid, and the preparation method is obtained by the following steps:
s1: weighing 50 parts by weight of dichloromethane, 8 parts by weight of (2-chloroethyl) trimethoxysilane and 3 parts by weight of potassium hydroxide, putting the dichloromethane, the (2-chloroethyl) trimethoxysilane and the potassium hydroxide into an oil bath pot, stirring and heating the mixture to 110 ℃, adding 20 parts by weight of deionized water, and heating, condensing and refluxing the mixture at the temperature of 110 ℃ for 48 hours; after the reaction is finished, centrifugally separating the product, cleaning the product by using anhydrous methanol, and carrying out vacuum drying at 50 ℃ for 24 hours to obtain octachloroethyl cage-type silsesquioxane;
s2: adding the octachloroethyl cage-type silsesquioxane obtained in the step S1 into a reaction kettle in a volume ratio of 1: 10, reacting for 24 hours in a mixed solution composed of 3-allyl-2-pyrrolidone and acetone under constant temperature and magnetic stirring at 60 ℃; then adding ammonium tetrafluoroborate for ion exchange to obtain the cage-type silsesquioxane containing the ionic liquid; the molar ratio of the ammonium tetrafluoroborate and the 3-allyl-2-pyrrolidone to the octachloroethyl cage-type silsesquioxane is 1.05: 1.1: 1;
s3: under the protection of nitrogen atmosphere, reacting the ionic liquid-containing cage-type silsesquioxane obtained in the step S2 with isocyanuric ethyl methacrylate at 40-70 ℃ to form a prepolymer, wherein the ionic liquid-containing cage-type silsesquioxane accounts for 5-30% by mass of the prepolymer, and then adding polyether polyol to synthesize a main structural unit, wherein the molar ratio of the polyether polyol to the prepolymer is 1-2.5: 1, finally obtaining the polyhedral oligomeric silsesquioxane modified polyurethane containing the ionic liquid.
The modification treatment of polyurethane is carried out by using the ionic liquid-containing cage type silsesquioxane, so that the formed water-based paint has the characteristics of high strength, wear resistance and scratch resistance; by the wider electrochemical window of the ionic liquid, the wider construction latitude is obtained in the electrostatic spraying construction process of the water-based paint; meanwhile, the surface tension of the water-based paint is reduced by using the characteristics of low free energy of the surface of the ionic liquid through the cage-type silsesquioxane modified polyurethane containing the ionic liquid, so that the water-based paint is prevented from sagging and poor in flattening property in the construction process; in addition, due to the nanometer characteristic of the cage-type silsesquioxane, the cage-type silsesquioxane can more easily extend into small slits on the surface of a coated object, and the surface of the coated object can not have pinhole defects after the construction process, so that the coated object has the effects of gloss, flatness, high strength, prolonged service life and the like, and the corrosion resistance of the water-based paint is further improved by combining the characteristics of the oxidation resistance of the ionic liquid and the strong bonding force of Si-O bonds in the cage-type silsesquioxane.
The polyhedral oligomeric silsesquioxane containing the tetrafluoroborate ionic liquid has hydrophilic performance and a defoaming function, and after polyurethane is modified, the polyhedral oligomeric silsesquioxane containing the tetrafluoroborate ionic liquid is promoted to be uniformly dispersed in a deionized water solvent, so that the leveling operation of the water-based paint in the construction process is facilitated.
Through modification of the ionic liquid, the low-temperature resistance of the water-based paint is improved, the construction of the water-based paint under a low-temperature condition is facilitated, and the construction latitude of the water-based paint is improved.
Preferably, the additive consists of octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide.
Preferably, the mass ratio of the octahydroxyl cage-type silsesquioxane to the modified calcium carbonate to the sodium hydroxide is 8-20: 1-12: 3 to 18.
The octahydroxyl cage type silsesquioxane has a nano microsphere structure, can promote the permeation of the water-based paint on the surface of a coated object, and can be combined with a water-based resin dispersion through the existence of hydroxyl groups, so that the strength of the water-based paint is improved; the modified calcium carbonate is hydroxylated modified calcium carbonate so as to be better dispersed in a water-based paint system, play a role in stabilization and activation, and serve as a water-based paint reinforcing agent to further improve the strength and the corrosion resistance of the water-based paint; the sodium hydroxide is used for adjusting the pH value of the water paint system and keeping the stability of the system.
Preferably, the film-forming assistant is prepared from the following components in a mass ratio of 0.8-1.2: 0.8-1.2 parts of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The added film-forming assistant has high boiling point, excellent environment-friendly performance, good miscibility and low volatility, can form excellent continuous coating, can obviously reduce the lowest film-forming temperature of the water-based paint, and can improve the coalescence and scrub resistance of the emulsion paint, so that the paint film has good storage stability.
Preferably, the defoaming agent consists of sodium hexanol polyether-4 carboxylate or/and trihydroxy polyoxypropylene ether and polyether modified silicone oil.
The compound defoaming agent consisting of hexanol polyether-4 sodium carboxylate or/and trihydroxy polyoxypropylene ether and polyether modified silicone oil has good intersolubility with the water paint system, has excellent defoaming performance, and does not need to add an emulsifier, so that the surface of a coated object does not have a shrinkage cavity phenomenon after the water paint is sprayed.
Preferably, the thickening agent consists of a cellulose ether compound or/and an inorganic thickening agent.
The cellulose ether compound is at least one of hydroxypropyl methyl cellulose, sodium carboxymethyl cellulose and hydroxyethyl cellulose.
The inorganic thickener is at least one of sodium bentonite, organic bentonite, diatomite and silica gel.
Preferably, the dispersant is a sodium polyacrylate salt.
Correspondingly, the preparation method of the high-performance environment-friendly water-based paint comprises the following steps:
s1: weighing 500-1000 parts of aqueous resin dispersion, 50-100 parts of deionized water, 5-15 parts of additive, 28-56 parts of film forming additive, 5-30 parts of defoaming agent and 3-10 parts of dispersing agent in a stirrer, uniformly dispersing, heating the mixture to 40-60 ℃ in a microwave mode, stirring while vacuumizing for 5-10 minutes, wherein the rotating speed of the stirrer is 800-1200 revolutions per minute;
s2: reducing the rotating speed of the stirrer to 200-600 revolutions per minute, continuously stirring and vacuumizing for 10-30 minutes, adding 50-100 parts of deionized water for dilution, slowly adding 1-20 parts of thickening agent under the condition of full stirring, and fully stirring for 10-30 minutes to obtain the environment-friendly water-based paint.
The invention has the beneficial effects that:
according to the invention, the cage type silsesquioxane containing ionic liquid is used for modifying polyurethane, and acrylic acid and derivatives thereof are copolymerized or blended to be used as the main component of the water-based paint, so that the prepared water-based paint has the characteristics of high strength, wear resistance, scratch resistance and corrosion resistance, and the defects of sagging, poor flattening performance, paint shrinkage cavity and the like cannot be generated in the construction process.
According to the invention, by adding the compound additive consisting of the octahydroxyl cage type silsesquioxane, the modified calcium carbonate and the sodium hydroxide, the strength and the corrosion resistance of a paint film are further improved, and the storage stability of the water-based paint is improved.
The added film-forming assistant, the defoamer and the thickener have excellent environmental protection performance of formula components and good intersolubility with main components, are easy to disperse in the water-based paint system, and the prepared water-based paint has uniform and flat paint film surface and is not easy to have various defects in the construction process of the existing water-based paint.
The water-based paint disclosed by the invention is safe and environment-friendly, simple to prepare, stable to store, excellent in comprehensive performance and good in market application prospect.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
The high-performance environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 500 parts of aqueous resin dispersoid, 100 parts of deionized water, 5 parts of additive, 28 parts of film-forming additive, 5 parts of defoaming agent, 1 part of thickening agent and 3 parts of sodium polyacrylate.
The aqueous resin dispersion is a copolymer of modified polyurethane and acrylic acid.
The modified polyurethane is polyhedral oligomeric silsesquioxane modified polyurethane containing ionic liquid, and the preparation method comprises the following steps:
s1: weighing 50 parts by weight of dichloromethane, 8 parts by weight of (2-chloroethyl) trimethoxysilane and 3 parts by weight of potassium hydroxide, putting the dichloromethane, the (2-chloroethyl) trimethoxysilane and the potassium hydroxide into an oil bath pot, stirring and heating the mixture to 110 ℃, adding 20 parts by weight of deionized water, and heating, condensing and refluxing the mixture at the temperature of 110 ℃ for 48 hours; after the reaction is finished, centrifugally separating the product, cleaning the product by using anhydrous methanol, and carrying out vacuum drying at 50 ℃ for 24 hours to obtain octachloroethyl cage-type silsesquioxane;
s2: adding the octachloroethyl cage-type silsesquioxane obtained in the step S1 into a reaction kettle in a volume ratio of 1: 10, reacting for 24 hours in a mixed solution composed of 3-allyl-2-pyrrolidone and acetone under constant temperature and magnetic stirring at 60 ℃; then adding ammonium tetrafluoroborate for ion exchange to obtain the cage-type silsesquioxane containing the ionic liquid; the molar ratio of the ammonium tetrafluoroborate and the 3-allyl-2-pyrrolidone to the octachloroethyl cage-type silsesquioxane is 1.05: 1.1: 1;
s3: under the protection of nitrogen atmosphere, the ionic liquid-containing cage-type silsesquioxane obtained in the step S2 and isocyano ethyl methacrylate react at 40 ℃ to form a prepolymer, the ionic liquid-containing cage-type silsesquioxane accounts for 18% by mass of the prepolymer, polyether polyol is added to synthesize a main structural unit, and the molar ratio of the polyether polyol to the prepolymer is 1.5: 1, finally obtaining the polyhedral oligomeric silsesquioxane modified polyurethane containing the ionic liquid.
The additive consists of octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide.
The mass ratio of the octahydroxyl cage type silsesquioxane to the modified calcium carbonate to the sodium hydroxide is 8: 1: 3.
the film-forming assistant is prepared from the following components in percentage by mass of 1: 1 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The defoaming agent is prepared from the following components in percentage by mass of 1: 2 of hexanol polyether-4 sodium carboxylate and polyether modified silicone oil.
The thickening agent is prepared from the following components in percentage by mass of 1: 1 hydroxypropyl methylcellulose and sodium carboxymethyl cellulose.
Correspondingly, the preparation method of the high-performance environment-friendly water-based paint comprises the following steps:
s1: weighing 500 parts of aqueous resin dispersoid, 50 parts of deionized water, 5 parts of additive, 28 parts of film-forming auxiliary agent, 5 parts of defoaming agent and 3 parts of polyacrylic acid sodium salt, putting into a stirrer, uniformly dispersing, heating the mixture to 40 ℃ in a microwave mode, and stirring and vacuumizing for 5 minutes, wherein the rotating speed of the stirrer is 800 revolutions per minute;
s2: and reducing the rotation speed of the stirrer to 200 revolutions per minute, continuously stirring and vacuumizing for 30 minutes, adding 50 parts of deionized water for dilution, slowly adding 1 part of thickening agent under the condition of full stirring, and fully stirring for 10 minutes to obtain the environment-friendly water-based paint.
Example 2
The high-performance environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 800 parts of aqueous resin dispersion, 160 parts of deionized water, 10 parts of additive, 37 parts of film-forming additive, 22 parts of defoaming agent, 10 parts of thickening agent and 6 parts of sodium polyacrylate.
The aqueous resin dispersion is a copolymer of modified polyurethane and an acrylic acid derivative.
The modified polyurethane is polyhedral oligomeric silsesquioxane modified polyurethane containing ionic liquid, the preparation method of the modified polyurethane is basically similar to that of example 1, and the main difference is that S3: under the protection of nitrogen atmosphere, the ionic liquid-containing cage-type silsesquioxane obtained in the step S2 and isocyano ethyl methacrylate react at 60 ℃ to form a prepolymer, the ionic liquid-containing cage-type silsesquioxane accounts for 15% by mass of the prepolymer, polyether polyol is added to synthesize a main structural unit, and the molar ratio of the polyether polyol to the prepolymer is 2.5: 1, finally obtaining the polyhedral oligomeric silsesquioxane modified polyurethane containing the ionic liquid.
The additive consists of octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide.
The mass ratio of the octahydroxyl cage type silsesquioxane to the modified calcium carbonate to the sodium hydroxide is 15: 7: 12.
the film-forming assistant is prepared from the following components in percentage by mass of 0.8: 1.2 propylene glycol butyl ether and propylene glycol methyl ether acetate.
The defoaming agent is prepared from the following components in percentage by mass of 0.8: 1.2 of trihydroxy polyoxypropylene ether and polyether modified silicone oil.
The thickening agent is prepared from the following components in percentage by mass of 1: 1 of organic bentonite and diatomite.
Correspondingly, the preparation method of the high-performance environment-friendly water-based paint comprises the following steps:
s1: weighing 800 parts of aqueous resin dispersoid, 80 parts of deionized water, 10 parts of additive, 37 parts of film-forming additive, 22 parts of defoaming agent and 6 parts of sodium polyacrylate in parts by weight, putting the mixture into a stirrer, uniformly dispersing, heating the mixture to 50 ℃ in a microwave mode, and stirring while vacuumizing for 8 minutes, wherein the rotating speed of the stirrer is 1000 revolutions per minute;
s2: and reducing the rotating speed of the stirrer to 500 revolutions per minute, continuously stirring and vacuumizing for 20 minutes, adding 80 parts of deionized water for dilution, slowly adding 10 parts of thickening agent under the condition of full stirring, and fully stirring for 20 minutes to obtain the environment-friendly water-based paint.
Example 3
The high-performance environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 1000 parts of aqueous resin dispersoid, 200 parts of deionized water, 15 parts of additive, 56 parts of film-forming additive, 30 parts of defoaming agent, 20 parts of thickening agent and 10 parts of sodium polyacrylate.
The aqueous resin dispersion is a blend of modified polyurethane and acrylic acid.
The modified polyurethane is polyhedral oligomeric silsesquioxane modified polyurethane containing ionic liquid, the preparation method of the modified polyurethane is basically similar to that of example 1, and the main difference is that S3: under the protection of nitrogen atmosphere, the ionic liquid-containing cage-type silsesquioxane obtained in the step S2 and isocyano ethyl methacrylate react at 70 ℃ to form a prepolymer, the ionic liquid-containing cage-type silsesquioxane accounts for 30% by mass of the prepolymer, polyether polyol is added to synthesize a main structural unit, and the molar ratio of the polyether polyol to the prepolymer is 1.5: 1, finally obtaining the polyhedral oligomeric silsesquioxane modified polyurethane containing the ionic liquid.
The additive consists of octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide.
The mass ratio of the octahydroxyl cage type silsesquioxane to the modified calcium carbonate to the sodium hydroxide is 20: 12: 18.
the film-forming assistant is prepared from the following components in percentage by mass of 1.2: 0.8 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The defoaming agent is prepared from the following components in percentage by mass of 1.2: 0.8: 1, hexanol polyether-4 sodium carboxylate, trihydroxy polyoxypropylene ether and polyether modified silicone oil.
The thickening agent is prepared from the following components in percentage by mass of 3: 1 and silica gel.
Correspondingly, the preparation method of the high-performance environment-friendly water-based paint comprises the following steps:
s1: weighing 1000 parts of aqueous resin dispersoid, 100 parts of deionized water, 15 parts of additive, 56 parts of film-forming additive, 30 parts of defoaming agent and 10 parts of sodium polyacrylate in parts by weight, putting the mixture into a stirrer, uniformly dispersing, heating the mixture to 60 ℃ in a microwave manner, and stirring and vacuumizing for 10 minutes at the rotation speed of the stirrer of 1200 revolutions per minute;
s2: and reducing the rotating speed of the stirrer to 600 revolutions per minute, continuously stirring and vacuumizing for 30 minutes, adding 100 parts of deionized water for dilution, slowly adding 20 parts of thickening agent under the condition of full stirring, and fully stirring for 30 minutes to obtain the environment-friendly water-based paint.
Example 4
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint are basically similar to those of the embodiment 1, and the main difference is that the environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 500 parts of aqueous resin dispersion, 200 parts of deionized water, 10 parts of additive, 42 parts of film-forming additive, 15 parts of defoaming agent, 16 parts of thickening agent and 6 parts of dispersing agent.
In the preparation process of the ionic liquid-containing cage-type silsesquioxane modified polyurethane, the ionic liquid-containing cage-type silsesquioxane accounts for 25% of the prepolymer by mass.
Example 5
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint are basically similar to those of the embodiment 1, and the main difference is that the environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 800 parts of aqueous resin dispersion, 150 parts of deionized water, 5 parts of additive, 36 parts of film-forming additive, 10 parts of defoaming agent, 15 parts of thickening agent and 10 parts of dispersing agent.
The defoaming agent is prepared from the following components in percentage by mass of 1: 1: 1, hexanol polyether-4 sodium carboxylate, trihydroxy polyoxypropylene ether and polyether modified silicone oil.
The thickening agent is prepared from the following components in percentage by mass of 1: 2: 1 of sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose and organic bentonite.
Comparative example 1
The high-performance environment-friendly water-based paint of the comparative example has the same raw material composition and preparation method as those of example 1, and mainly differs in that the water-based paint does not contain an additive consisting of octahydroxy cage-type silsesquioxane, modified calcium carbonate and sodium hydroxide.
Comparative example 2
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the polyurethane in the main component of the water-based paint is not subjected to modification treatment of the ionic liquid-containing cage-type silsesquioxane.
Comparative example 3
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the polyurethane modifier in the main component of the water-based paint is cage-type silsesquioxane which does not contain ionic liquid.
Comparative example 4
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the thickening agent is sodium carboxymethyl cellulose.
Comparative example 5
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the defoaming agent is polyether modified silicone oil.
The performance test of the water-based paint prepared in the embodiments 1-5 and the comparative examples 1-5 is carried out according to GB/T23999-2009 waterborne wood coatings for interior decoration, and the performance results are shown in tables 1 and 2:
TABLE 1
| In the container state | Gloss (60 ℃ C.) | Drying time | Paint film appearance | |
| Example 1 | No hard block after even stirring | 97 | Surface drying is less than or equal to 15min, and solid drying is less than or equal to 2h | Is even and flat |
| Example 2 | No hard block after even stirring | 96 | Surface drying is less than or equal to 15min, and solid drying is less than or equal to 2h | Is even and flat |
| Example 3 | No hard block after even stirring | 97 | Surface drying is less than or equal to 15min, and solid drying is less than or equal to 2h | Is even and flat |
| Example 4 | No hard block after even stirring | 95 | Surface drying is less than or equal to 15min, and solid drying is less than or equal to 2h | Is even and flat |
| Example 5 | No hard block after even stirring | 96 | Surface drying is less than or equal to 15min, and solid drying is less than or equal to 2h | Is even and flat |
| Comparative example 1 | After being stirred uniformly, the mixture has hard blocks | 82 | Surface drying for 21min, and solid drying for 5.2h | Has defects |
| Comparative example 2 | After being stirred uniformly, the mixture has hard blocks | 89 | Surface drying for 28min, and solid drying for 4.5h | Has defects |
| Comparative example 3 | No hard block after even stirring | 94 | Surface drying for 20min, and solid drying for 3.8h | Has defects |
| Comparative example 4 | No hard block after even stirring | 91 | Surface drying for 30min, and solid drying for 6h | Has defects |
| Comparative example 5 | No hard block after even stirring | 86 | Surface drying for 17min, and solid drying for 2.5h | Has defects |
TABLE 2
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (5)
1. A high-performance environment-friendly water-based paint is characterized in that: the environment-friendly water-based paint is prepared from the following raw materials in parts by weight: 500-1000 parts of an aqueous resin dispersion, 100-200 parts of deionized water, 5-15 parts of an additive, 28-56 parts of a film forming aid, 5-30 parts of a defoaming agent, 1-20 parts of a thickening agent and 3-10 parts of a dispersing agent, wherein the aqueous resin dispersion is at least one of a copolymer of modified polyurethane and acrylic acid and a copolymer of modified polyurethane and an acrylic acid derivative, the additive is composed of octahydroxy cage-type silsesquioxane, modified calcium carbonate and sodium hydroxide, and the defoaming agent is prepared from the following components in a mass ratio of 1: 2 and polyether modified silicone oil, wherein the thickening agent is prepared from the following components in percentage by mass of 1: 1 of hydroxypropyl methylcellulose and sodium carboxymethylcellulose;
the modified polyurethane is polyhedral oligomeric silsesquioxane modified polyurethane containing ionic liquid, and the preparation method comprises the following steps:
s1: weighing 50 parts by weight of dichloromethane, 8 parts by weight of (2-chloroethyl) trimethoxysilane and 3 parts by weight of potassium hydroxide, putting the dichloromethane, the (2-chloroethyl) trimethoxysilane and the potassium hydroxide into an oil bath pot, stirring and heating the mixture to 110 ℃, adding 20 parts by weight of deionized water, and heating, condensing and refluxing the mixture at the temperature of 110 ℃ for 48 hours; after the reaction is finished, centrifugally separating the product, cleaning the product by using anhydrous methanol, and carrying out vacuum drying at 50 ℃ for 24 hours to obtain octachloroethyl cage-type silsesquioxane;
s2: adding the octachloroethyl cage-type silsesquioxane obtained in the step S1 into a reaction kettle in a volume ratio of 1: 10, reacting for 24 hours in a mixed solution composed of 3-allyl-2-pyrrolidone and acetone under constant temperature and magnetic stirring at 60 ℃; then adding ammonium tetrafluoroborate for ion exchange to obtain the cage-type silsesquioxane containing the ionic liquid; the molar ratio of the ammonium tetrafluoroborate and the 3-allyl-2-pyrrolidone to the octachloroethyl cage-type silsesquioxane is 1.05: 1.1: 1;
s3: under the protection of nitrogen atmosphere, reacting the ionic liquid-containing cage-type silsesquioxane obtained in the step S2 with isocyanoethyl methacrylate at 40-70 ℃ to form a prepolymer, and then adding polyether polyol to synthesize a main structural unit, thereby finally obtaining the ionic liquid-containing cage-type silsesquioxane modified polyurethane.
2. The high-performance environment-friendly water-based paint as claimed in claim 1, wherein the mass ratio of the octahydroxyl cage-type silsesquioxane to the modified calcium carbonate to the sodium hydroxide is 8-20: 1-12: 3 to 18.
3. The high-performance environment-friendly water-based paint as claimed in claim 1, wherein the film-forming assistant is prepared from the following components in a mass ratio of 0.8-1.2: 0.8-1.2 parts of propylene glycol butyl ether and propylene glycol methyl ether acetate.
4. The high-performance environment-friendly water-based paint according to claim 1, wherein the dispersant is a polyacrylic acid sodium salt.
5. A method for preparing the high-performance environment-friendly water-based paint according to any one of claims 1 to 4, wherein the method comprises the following steps:
s1: weighing 500-1000 parts of aqueous resin dispersion, 50-100 parts of deionized water, 5-15 parts of additive, 28-56 parts of film forming additive, 5-30 parts of defoaming agent and 3-10 parts of dispersing agent in a stirrer, uniformly dispersing, heating to 40-60 ℃ in a microwave mode, stirring while vacuumizing for 5-10 minutes, wherein the rotating speed of the stirrer is 800-1200 revolutions per minute;
s2: reducing the rotating speed of the stirrer to 200-600 revolutions per minute, continuously stirring and vacuumizing for 10-30 minutes, adding 50-100 parts of deionized water for dilution, slowly adding 1-20 parts of thickening agent under the condition of full stirring, and fully stirring for 10-30 minutes to obtain the environment-friendly water-based paint.
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| JP5270435B2 (en) * | 2009-04-17 | 2013-08-21 | 関西ペイント株式会社 | Silsesquioxane compound having a polymerizable functional group |
| DE102014207421A1 (en) * | 2014-04-17 | 2015-10-22 | Evonik Degussa Gmbh | Surfactant compositions and high oily formulations containing these |
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