CN115340804A - Self-emulsifying formula for preparing water-based epoxy coating - Google Patents
Self-emulsifying formula for preparing water-based epoxy coating Download PDFInfo
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- CN115340804A CN115340804A CN202211108304.0A CN202211108304A CN115340804A CN 115340804 A CN115340804 A CN 115340804A CN 202211108304 A CN202211108304 A CN 202211108304A CN 115340804 A CN115340804 A CN 115340804A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention provides a self-emulsifying formula for preparing a water-based epoxy coating, and relates to the technical field of water-based epoxy coatings. The self-emulsifying formula for preparing the water-based epoxy coating comprises the following components in parts by weight: 22-35 parts of water-based epoxy resin, 5-10 parts of polydopamine, 3-5 parts of slow-release nanotubes, 2-4 parts of a flatting agent, 5-10 parts of an acrylic copolymer, 1.5 parts of aluminum tripolyphosphate, 8-12 parts of a color filler and 80-100 parts of deionized water. The self-emulsified water-based epoxy coating is obtained by adopting a non-modified mode through the action of each component, although the retention time is not long as that of chemical modification, the self-emulsified water-based epoxy coating can meet the use requirement, can play a role in protecting the surface of a coated object after being used against rust and corrosion, and has a self-repairing function, so that the self-emulsified water-based epoxy coating is very convenient to manufacture and can generate benefits quickly.
Description
Technical Field
The invention relates to the technical field of water-based epoxy coatings, in particular to a self-emulsifying formula for preparing a water-based epoxy coating.
Background
The epoxy paint is a paint using water as a solvent or a dispersion medium. The water-based epoxy coating comprises a water-soluble epoxy coating and a water-emulsified coating.
The self-emulsifying water-based epoxy coating on the market is mainly chemically modified, and although the obtained water-based epoxy coating is good in stability, the research and development difficulty is high, so that the research and development period to the production is prolonged, and the cost performance is low, so that the self-emulsifying formula for preparing the water-based epoxy coating is invented.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a self-emulsifying formula for preparing a water-based epoxy coating, and solves the problems of high research and development cost and low benefit of a chemically modified self-emulsifying water-based epoxy coating.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a self-emulsifying formula for preparing a water-based epoxy coating comprises the following components in parts by weight: 22-35 parts of waterborne epoxy resin, 5-10 parts of polydopamine, 3-5 parts of slow-release nanotubes, 2-4 parts of a flatting agent, 5-10 parts of an acrylic copolymer, 1.5 parts of aluminum tripolyphosphate, 8-12 parts of a color filler and 80-100 parts of deionized water.
Preferably, the slow-release nanotube is a product obtained by filling the open polydopamine nanotube with nano magnesium nitride under the action of capillary.
Preferably, the acrylic copolymer is any one of methyl acrylate, ethyl acrylate and 2-methyl methacrylate.
Preferably, the color filler is talc and kaolin in a ratio of 1:2 the resulting mixture.
Preferably, the leveling agent is any one of organic silicon leveling agents.
(III) advantageous effects
The invention provides a self-emulsifying formula for preparing a water-based epoxy coating. The method has the following beneficial effects:
according to the invention, the self-emulsified water-based epoxy coating is obtained in a non-modified mode through the action of each component, the natural retention time is not chemically modified for a long time, but the self-emulsified water-based epoxy coating can meet the use requirement, can play a role in protecting the surface of a coated object after being used against rust and corrosion, and has a self-repairing function, so that the self-emulsified water-based epoxy coating is very convenient to manufacture and can quickly generate benefits.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a self-emulsifying formula for preparing a water-based epoxy coating, which comprises the following components in parts by weight: 22 parts of waterborne epoxy resin, 5 parts of polydopamine, 3 parts of slow-release nanotubes, 2 parts of polyether polyester modified organosiloxane, 5 parts of methyl acrylate, 1.5 parts of aluminum tripolyphosphate, 8 parts of color filler and 80 parts of deionized water;
the color fillers are talcum powder and kaolin which are mixed in a ratio of 1:2 the resulting mixture.
The slow-release nanotube is a product obtained by filling a polydopamine nanotube with openings at two ends with nano magnesium nitride under the action of a capillary tube, the polydopamine nanotube is a product coated by polydopamine on a water-soluble sodium sulfate nanowire as a template, the polydopamine nanotube is filled with the nano magnesium nitride and then crushed by an ultrasonic nano crusher in a dry environment to obtain the slow-release nanotube, and the slow-release nanotube is stored in a dry container.
The preparation method of the self-emulsifying water-based epoxy coating comprises the following steps: mixing water-based epoxy resin, methyl acrylate and aluminium triphosphate to obtain a composition A, mixing a slow-release nanotube and polydopamine to obtain a composition B, mixing polyether polyester modified organosiloxane and a color filler to obtain a composition C, mixing the composition A and the composition C, adding four fifths of deionized water in the process, cooling the rest deionized water to-20 ℃, adding the mixture into the composition B, treating the mixture for 20 seconds by using an ultrasonic oscillator, introducing the mixture from the bottom of the mixture of the composition A and the composition C, releasing nano magnesium nitride in the slow-release nanotube during the treatment of the deionized water and the composition B by using the ultrasonic oscillator, generating an alkaline environment after the nano magnesium nitride is contacted with the deionized water, ensuring the polymerization stability of the polydopamine in the alkaline environment, after the polydopamine is combined with the mixed composition A and the composition C, releasing the generated ammonia from the end of the polydopamine nanotube due to the reaction of the deionized water and the nano magnesium nitride, enabling the slow-release nanotube to be pushed slowly in a self-emulsifying water-based epoxy coating, enabling the magnesium hydroxide obtained by the reaction to precipitate on the inner wall of the polydopamine nanotube, slowing the contact of the deionized water with the nano magnesium nitride, and the nano magnesium hydroxide component, and gradually increasing the viscosity of the aqueous epoxy coating, and gradually increasing the aqueous sodium hydroxide component when the aqueous epoxy coating and the aqueous epoxy resin suspension of the polydopamine is separated from the epoxy coating.
Example two:
the embodiment of the invention provides a self-emulsifying formula for preparing a water-based epoxy coating, which comprises the following components in parts by weight: 25 parts of waterborne epoxy resin, 8 parts of polydopamine, 4 parts of slow-release nanotubes, 3 parts of polyether polyester modified organosiloxane, 8 parts of 2-methyl methacrylate, 1.5 parts of aluminum tripolyphosphate, 10 parts of color filler and 90 parts of deionized water;
the color fillers are talcum powder and kaolin, and the weight ratio of the talcum powder to the kaolin is 1:2 the resulting mixture.
The slow release nanotube is a product obtained by filling a polydopamine nanotube with openings at two ends with nano magnesium nitride under the action of capillary tubes, the polydopamine nanotube is a product coated by polydopamine on water-soluble sodium sulfate nanowires as a template, the polydopamine nanotube is filled with the nano magnesium nitride and then crushed by an ultrasonic nano crusher in a dry environment to obtain the slow release nanotube, and the slow release nanotube is stored in a dry container.
The preparation method of the self-emulsifying water-based epoxy coating comprises the following steps: mixing waterborne epoxy resin, 2-methyl methacrylate and aluminium triphosphate to obtain a composition A, mixing a slow-release nanotube and polydopamine to obtain a composition B, mixing polyether polyester modified organosiloxane and a color filler to obtain a composition C, mixing the composition A and the composition C, adding four fifths of deionized water during the mixing process, cooling the rest deionized water to-20 ℃, adding the deionized water into the composition B, treating the mixture for 20 seconds by using an ultrasonic oscillator, introducing the deionized water from the bottom of the mixture of the composition A and the composition C, releasing nano magnesium nitride in the slow-release nanotube during the treatment of the deionized water and the composition B in the ultrasonic oscillator, generating an alkaline environment after the nano magnesium nitride is contacted with the deionized water, ensuring the polymerization stability of the polydopamine in the alkaline environment, after the polydopamine is combined with the mixed composition A and the composition C, releasing the generated ammonia from the end of the polydopamine nanotube due to the reaction of the deionized water and the nano magnesium nitride, so that the slow-release nanotube is pushed slowly in a self-emulsifying waterborne epoxy coating, the magnesium hydroxide component obtained by the reaction is precipitated on the inner wall of the polydopamine nanotube, slowing down the contact of the nano magnesium hydroxide component, and the release of the nano magnesium hydroxide, and gradually increasing the viscous component of the aqueous epoxy coating when the aqueous epoxy resin is separated from the aqueous epoxy resin, and the aqueous epoxy resin.
Example three:
the embodiment of the invention provides a self-emulsifying formula for preparing a water-based epoxy coating, which comprises the following components in parts by weight: 35 parts of waterborne epoxy resin, 10 parts of polydopamine, 5 parts of slow-release nanotubes, 4 parts of alkyl modified organosiloxane, 10 parts of ethyl acrylate, 1.5 parts of aluminum tripolyphosphate, 12 parts of color filler and 100 parts of deionized water;
the color fillers are talcum powder and kaolin which are mixed in a ratio of 1:2 the resulting mixture.
The slow release nanotube is a product obtained by filling a polydopamine nanotube with openings at two ends with nano magnesium nitride under the action of capillary tubes, the polydopamine nanotube is a product coated by polydopamine on water-soluble sodium sulfate nanowires as a template, the polydopamine nanotube is filled with the nano magnesium nitride and then crushed by an ultrasonic nano crusher in a dry environment to obtain the slow release nanotube, and the slow release nanotube is stored in a dry container.
The preparation method of the self-emulsifying water-based epoxy coating comprises the following steps: the preparation method comprises the steps of mixing water-based epoxy resin, methyl acrylate, aluminum tripolyphosphate, alkyl modified organic siloxane and a color filler to obtain a composition A, mixing a slow-release nanotube and polydopamine to obtain a composition B, adding 100 parts of deionized water into the composition A, adding the composition B into a container, quickly pouring the composition A with the deionized water onto the composition B, treating the composition A and the composition B by using an ultrasonic oscillator, wherein the deionized water and nano magnesium nitride in the slow-release nanotube are released during the treatment of the composition B by the ultrasonic oscillator, an alkaline environment is generated after the nano magnesium nitride is contacted with the deionized water, the polymerization stability of the polydopamine is guaranteed in the alkaline environment, the generated ammonia gas is released from the end of the polydopamine nanotube due to the reaction of the deionized water and the nano magnesium nitride, so that the slow-release nanotube is slowly pushed by the slow-release nanotube during the separation of the self-emulsifying water-based epoxy coating, the magnesium hydroxide precipitate obtained by the reaction is attached to the inner wall of the polydopamine nanotube, the contact of the deionized water and the nano magnesium nitride is slowed, the ammonia gas and the ammonia gas is gradually contacted with the sodium hydroxide in the environment of the polydopamine nanotube to generate good suspending phosphate.
Example four:
the embodiment of the invention provides a self-emulsifying formula for preparing a water-based epoxy coating, which comprises the following components in parts by weight: 32 parts of waterborne epoxy resin, 9 parts of polydopamine, 4 parts of slow-release nanotubes, 4 parts of alkyl modified organosiloxane, 9 parts of ethyl acrylate, 1.5 parts of aluminum tripolyphosphate, 11 parts of color filler and 95 parts of deionized water;
the color fillers are talcum powder and kaolin which are mixed in a ratio of 1:2 the resulting mixture.
The slow release nanotube is a product obtained by filling a polydopamine nanotube with openings at two ends with nano magnesium nitride under the action of capillary tubes, the polydopamine nanotube is a product coated by polydopamine on water-soluble sodium sulfate nanowires as a template, the polydopamine nanotube is filled with the nano magnesium nitride and then crushed by an ultrasonic nano crusher in a dry environment to obtain the slow release nanotube, and the slow release nanotube is stored in a dry container.
The preparation method of the self-emulsifying water-based epoxy coating comprises the following steps: the preparation method comprises the steps of mixing water-based epoxy resin, methyl acrylate, aluminum tripolyphosphate, alkyl modified organic siloxane and a color filler to obtain a composition A, mixing a slow-release nanotube and polydopamine to obtain a composition B, adding 100 parts of deionized water into the composition A, adding the composition B into a container, quickly pouring the composition A with the deionized water onto the composition B, treating the composition A and the composition B by using an ultrasonic oscillator, wherein the deionized water and nano magnesium nitride in the slow-release nanotube are released during the treatment of the composition B by the ultrasonic oscillator, an alkaline environment is generated after the nano magnesium nitride is contacted with the deionized water, the polymerization stability of the polydopamine is guaranteed in the alkaline environment, the generated ammonia gas is released from the end of the polydopamine nanotube due to the reaction of the deionized water and the nano magnesium nitride, so that the slow-release nanotube is slowly pushed by the slow-release nanotube during the separation of the self-emulsifying water-based epoxy coating, the magnesium hydroxide precipitate obtained by the reaction is attached to the inner wall of the polydopamine nanotube, the contact of the deionized water and the nano magnesium nitride is slowed, the ammonia gas and the ammonia gas is gradually contacted with the sodium hydroxide in the environment of the polydopamine nanotube to generate good suspending phosphate.
The time for completing emulsification of the self-emulsifying aqueous epoxy coating materials obtained in the first and second examples is 4-5 min and 2.5-3 min, respectively, and the time for completing emulsification of the self-emulsifying aqueous epoxy coating materials obtained in the third and fourth examples is 6-6.5 min and 5.5-6 min, respectively, and the preparation methods of the self-emulsifying aqueous epoxy coating materials corresponding to the first and second examples are superior to those of the first and second examples.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The self-emulsifying formula for preparing the water-based epoxy coating is characterized by comprising the following components in parts by weight: 22-35 parts of water-based epoxy resin, 5-10 parts of polydopamine, 3-5 parts of slow-release nanotubes, 2-4 parts of a flatting agent, 5-10 parts of an acrylic copolymer, 1.5 parts of aluminum tripolyphosphate, 8-12 parts of a color filler and 80-100 parts of deionized water.
2. The self-emulsifying formulation for preparing an aqueous epoxy coating according to claim 1, wherein: the slow release nanotube is a product obtained by filling the open polydopamine nanotube with nano magnesium nitride under the action of a capillary tube.
3. The self-emulsifying formulation for preparing an aqueous epoxy coating according to claim 1, wherein: the acrylic copolymer is any one of methyl acrylate, ethyl acrylate and 2-methyl methacrylate.
4. The self-emulsifying formulation for preparing a waterborne epoxy coating of claim 1, wherein: the color filler is prepared from talcum powder and kaolin in a weight ratio of 1:2 the resulting mixture.
5. The self-emulsifying formulation for preparing a waterborne epoxy coating of claim 1, wherein: the leveling agent is any one of organic silicon leveling agents.
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| CN202211108304.0A CN115340804A (en) | 2022-09-13 | 2022-09-13 | Self-emulsifying formula for preparing water-based epoxy coating |
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2022
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| XINGHUAN LIU ET AL.: "Amine-Triggered Dopamine Polymerization: From Aqueous Solution to Organic Solvents", MACROMOLECULAR RAPID COMMUNICATIONS, vol. 39, no. 12, pages 108 - 113 * |
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