CN110776802A - Epoxy modified acrylic acid environment-friendly paint for hardware parts and preparation method thereof - Google Patents
Epoxy modified acrylic acid environment-friendly paint for hardware parts and preparation method thereof Download PDFInfo
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- CN110776802A CN110776802A CN201911211289.0A CN201911211289A CN110776802A CN 110776802 A CN110776802 A CN 110776802A CN 201911211289 A CN201911211289 A CN 201911211289A CN 110776802 A CN110776802 A CN 110776802A
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
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- 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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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention provides an epoxy modified acrylic acid environment-friendly paint for hardware parts and a preparation method thereof, wherein the paint comprises the following raw materials in parts by weight: 60-80 parts of epoxy modified acrylic resin, 0.5-1 part of methylene dinaphthalene sodium sulfonate, 0.5-1 part of propylene glycol phenyl ether, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of dimethylethanolamine, 3-6 parts of barium sulfate, 2-3 parts of calcium oxide, 1-2 parts of nano zinc oxide, 1-2 parts of graphene oxide and 10-15 parts of water. According to the invention, the epoxy modified acrylic resin is obtained by ring-opening esterification reaction of the epoxy resin and the acrylic monomer, so that the problems of stickiness at high temperature, brittleness at low temperature, and poor water resistance, alkali resistance and weather resistance of the acrylic coating are solved, and meanwhile, the mechanical property and corrosion resistance of the coating are effectively improved by adding the graphene oxide and the nano zinc oxide.
Description
Technical Field
The invention relates to the technical field of acrylic coatings, and particularly relates to an epoxy modified acrylic acid environment-friendly coating for hardware parts and a preparation method thereof.
Background
Hardware parts refer to machine parts or components made of hardware, as well as some small hardware products. It can be used alone or as an assistant tool. Such as hardware tools, hardware parts, daily hardware, building hardware, security articles and the like. The small hardware products are mostly not the final consumer products. But as a kit for industrial manufacture, a semi-finished product, a tool for a production process, and the like. Only a small part of daily hardware products (accessories) are tool consumer goods necessary for people's life. Hardware spare and accessory parts are mostly metal products, are very easily corroded in humid atmosphere or special operational environment, lead to hardware spare and accessory parts to destroy, and the condition is serious still can lead to whole machine to damage, and consequently, hardware spare and accessory parts's anticorrosive coating protection is fairly necessary.
In the prior art, the anticorrosive coatings for hardware parts mainly comprise solvent type anticorrosive coatings (often called as paint), water-based anticorrosive coatings, powder coatings and high-solid component coatings. In recent years, as people pay more and more attention to environmental protection and self health, the harmfulness of VOC (volatile organic compounds) in various countries is paid more and more attention, various laws and regulations have been made to limit the emission of VOC, and the development of solvent-based anticorrosive coatings containing a large amount of VOC is limited. As an important environment-friendly coating, the water-based coating not only contains very low Volatile Organic Compounds (VOC), but also has the advantages of environmental protection, safety, harmlessness, resource and energy conservation and the like, and can gradually replace solvent-based coatings. The water-based acrylic coating not only has the excellent characteristics of solvent type acrylic, but also meets the requirements of safety and environmental protection, and has very wide development prospect. However, acrylic coatings are tacky at high temperatures and brittle at low temperatures, and have poor water resistance, alkali resistance and weather resistance, and their wide application is limited.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides an epoxy modified acrylic acid environment-friendly paint for hardware parts and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following scheme:
the invention provides an epoxy modified acrylic acid environment-friendly paint for hardware parts, which comprises the following raw materials in parts by weight:
60-80 parts of epoxy modified acrylic resin,
0.5 to 1 portion of methylene dinaphthalene sodium sulfonate,
0.5 to 1 portion of propylene glycol phenyl ether,
1-2 parts of hydroxypropyl methyl cellulose,
1-2 parts of Dimethyl Ethanolamine (DEMA),
3-6 parts of barium sulfate, namely barium sulfate,
2-3 parts of calcium oxide, namely,
1-2 parts of nano zinc oxide,
1-2 parts of graphene oxide,
10-15 parts of water;
the epoxy modified acrylic resin is prepared from epoxy resin and acrylic monomers through ring-opening esterification reaction, and comprises the following raw materials in parts by weight:
15-20 parts of epoxy resin,
40-60 parts of acrylic acid monomer,
5-10 parts of an emulsifying agent,
0.5 to 2 portions of initiator,
0.1-0.5 part of electrolyte.
Preferably, the epoxy resin is one of E-51, E-44, E-20, and E-12.
Preferably, the acrylic monomers include butyl acrylate, methacrylic acid, styrene.
Preferably, the emulsifier is a nonionic emulsifier and an anionic emulsifier in a mass ratio of 2-3: 1, mixing, wherein the nonionic emulsifier is octyl phenol polyoxyethylene ether, and the anionic emulsifier is sodium dodecyl sulfate.
Preferably, the nonionic emulsifier and the anionic emulsifier are present in a ratio of 2: 1 and mixing.
Preferably, the initiator is ammonium persulfate or potassium persulfate and the electrolyte is sodium bicarbonate.
The invention also provides a preparation method of the epoxy modified acrylic acid hardware part environment-friendly coating, which specifically comprises the following steps:
(1) heating epoxy resin, adding an acrylic monomer to form a mixed monomer after the fluidity of the epoxy resin is increased, adding an emulsifier into distilled water, slightly heating to dissolve the emulsifier, adding an electrolyte to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a part of mixed monomers into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and remaining mixed monomer, composite emulsion and initiator when heating and raising the temperature, raising the temperature to 75-85 ℃ after dripping is finished, reacting for 1-2h, and filtering to obtain epoxy modified acrylic resin emulsion after the reaction is finished;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Preferably, the mass of the mixed monomers added in step (2) accounts for 10% of the total mass of the mixed monomers.
Preferably, in the step (3), the temperature is raised to 80 ℃, the reaction is carried out for 1.5h, and the dropping of the mixed monomer, the emulsion and the initiator is finished for 1.5-2 h.
The invention has the beneficial effects that:
the graphene oxide is added into the coating, so that the coating has the effect of improving the corrosion resistance of the material, the effect is far away from the effect the same as that of graphene, when two-dimensional graphene oxide sheets are stacked layer by layer in the coating, a formed protective layer can delay the permeation of air and water, and the physical shielding effect is achieved, meanwhile, the graphene oxide has quick conductivity and can conduct electrons to the surface of the coating, so that matrix metal is protected, and meanwhile, the graphene oxide can be stably dispersed in water or some polar organic solvents due to the fact that a plurality of oxygen-containing functional groups exist on the surface of the graphene oxide, and the graphene oxide is introduced into a polymer system, so that the mechanical property and the flame retardant property of a polymer can be improved.
The nano zinc oxide is added into the coating, the specific surface area of the nano zinc oxide is large, the chemical activity is high, the fineness, the chemical purity and the particle shape of the nano zinc oxide can be adjusted according to requirements, so that the coating has a photochemical effect and a good ultraviolet shielding performance, the ultraviolet shielding rate is up to 98%, and meanwhile, the coating also has a series of unique performances of resisting and inhibiting bacteria, removing odor and preventing mildew and the like.
According to the invention, the epoxy modified acrylic resin is obtained by ring-opening esterification reaction of the epoxy resin and the acrylic monomer, so that the problems of stickiness at high temperature, brittleness at low temperature, and poor water resistance, alkali resistance and weather resistance of the acrylic coating are solved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An epoxy modified acrylic acid environment-friendly paint for hardware parts comprises the following raw materials in parts by weight: 75 parts of epoxy modified acrylic resin, 0.8 part of methylene dinaphthalene sodium sulfonate, 0.5 part of propylene glycol phenyl ether, 1.2 parts of hydroxypropyl methyl cellulose, 1.6 parts of dimethylethanolamine, 4.5 parts of barium sulfate, 2.4 parts of calcium oxide, 1.5 parts of nano zinc oxide, 1.4 parts of graphene oxide and 12 parts of water; the epoxy modified acrylic resin is prepared from epoxy resin E-44, butyl acrylate, methacrylic acid and styrene through ring-opening esterification reaction, and comprises the following raw materials in parts by weight: epoxy resin E-4418 parts, butyl acrylate 18 parts, methacrylic acid 15 parts, styrene 20 parts, octyl phenol polyoxyethylene ether 5 parts, sodium dodecyl sulfate 2.5 parts, ammonium persulfate 0.8 part and sodium bicarbonate 0.3 part.
A preparation method of an epoxy modified acrylic acid hardware fitting environment-friendly coating specifically comprises the following steps:
(1) heating epoxy resin E-44, adding butyl acrylate, methacrylic acid and styrene monomer after the fluidity of the epoxy resin E-44 is increased to form a mixed monomer, adding distilled water after mixing octyl phenol polyoxyethylene ether and sodium dodecyl sulfate, slightly heating to dissolve an emulsifier, adding sodium bicarbonate to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a mixed monomer accounting for 15% of the total mass into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and the rest of the mixed monomer, the composite emulsion and the initiator when heating and raising the temperature, finishing dripping within 1.5h, raising the temperature to 80 ℃, reacting for 2h, and filtering after finishing the reaction to obtain epoxy modified acrylic resin emulsion;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Example 2
An epoxy modified acrylic acid environment-friendly paint for hardware parts comprises the following raw materials in parts by weight: 60 parts of epoxy modified acrylic resin, 0.6 part of methylene dinaphthalene sodium sulfonate, 1 part of propylene glycol phenyl ether, 1.5 parts of hydroxypropyl methyl cellulose, 2 parts of dimethylethanolamine, 3.5 parts of barium sulfate, 2.2 parts of calcium oxide, 0.6 part of nano zinc oxide, 0.8 part of graphene oxide and 15 parts of water; the epoxy modified acrylic resin is prepared from epoxy resin E-51, butyl acrylate, methacrylic acid and styrene through ring-opening esterification reaction, and comprises the following raw materials in parts by weight: epoxy resin E-5120 parts, butyl acrylate 10 parts, methacrylic acid 15 parts, styrene 25 parts, octyl phenol polyoxyethylene ether 6 parts, sodium dodecyl sulfate 2 parts, potassium persulfate 1.5 parts, and sodium bicarbonate 0.5 part.
A preparation method of an epoxy modified acrylic acid hardware fitting environment-friendly coating specifically comprises the following steps:
(1) heating epoxy resin E-51, adding butyl acrylate, methacrylic acid and styrene monomer after the fluidity of the epoxy resin E-51 is increased to form a mixed monomer, adding distilled water after mixing octyl phenol polyoxyethylene ether and sodium dodecyl sulfate, slightly heating to dissolve an emulsifier, adding sodium bicarbonate to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a mixed monomer accounting for 10% of the total mass into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and the rest of the mixed monomer, the composite emulsion and the initiator when heating and raising the temperature, finishing dripping within 1.5h, raising the temperature to 85 ℃, reacting for 2h, and filtering after finishing the reaction to obtain epoxy modified acrylic resin emulsion;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Example 3
An epoxy modified acrylic acid environment-friendly paint for hardware parts comprises the following raw materials in parts by weight: 75 parts of epoxy modified acrylic resin, 0.5 part of methylene dinaphthalene sodium sulfonate, 0.8 part of propylene glycol phenyl ether, 1.5 parts of hydroxypropyl methyl cellulose, 2 parts of dimethylethanolamine, 5 parts of barium sulfate, 2.5 parts of calcium oxide, 1.8 parts of nano zinc oxide, 2 parts of graphene oxide and 12 parts of water; the epoxy modified acrylic resin is prepared from epoxy resin E-44, butyl acrylate, methacrylic acid and styrene through ring-opening esterification reaction, and comprises the following raw materials in parts by weight: epoxy resin E-4415 parts, butyl acrylate 15 parts, methacrylic acid 10 parts, styrene 20 parts, octyl phenol polyoxyethylene ether 6 parts, sodium dodecyl sulfate 3 parts, ammonium persulfate 1.2 parts and sodium bicarbonate 0.2 part.
A preparation method of an epoxy modified acrylic acid hardware fitting environment-friendly coating specifically comprises the following steps:
(1) heating epoxy resin E-44, adding butyl acrylate, methacrylic acid and styrene monomer after the fluidity of the epoxy resin E-44 is increased to form a mixed monomer, adding distilled water after mixing octyl phenol polyoxyethylene ether and sodium dodecyl sulfate, slightly heating to dissolve an emulsifier, adding sodium bicarbonate to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a mixed monomer accounting for 18% of the total mass into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and the rest of the mixed monomer, the composite emulsion and the initiator when heating and raising the temperature, finishing dripping for 2h, raising the temperature to 78 ℃, reacting for 1h, and filtering after the reaction is finished to obtain epoxy modified acrylic resin emulsion;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Example 4
An epoxy modified acrylic acid environment-friendly paint for hardware parts comprises the following raw materials in parts by weight: 75 parts of epoxy modified acrylic resin, 0.8 part of methylene dinaphthalene sodium sulfonate, 1 part of propylene glycol phenyl ether, 1.6 parts of hydroxypropyl methyl cellulose, 1.2 parts of dimethylethanolamine, 5.5 parts of barium sulfate, 2.5 parts of calcium oxide, 2 parts of nano zinc oxide, 1 part of graphene oxide and 10 parts of water; the epoxy modified acrylic resin is prepared from epoxy resin E-12, butyl acrylate, methacrylic acid and styrene through ring-opening esterification reaction, and comprises the following raw materials in parts by weight: epoxy resin E-1218, butyl acrylate 15, methacrylic acid 15, styrene 20, octyl phenol polyethenoxy ether 4.5, sodium dodecyl sulfonate 1.5, ammonium persulfate 1.6 and sodium bicarbonate 0.4.
A preparation method of an epoxy modified acrylic acid hardware fitting environment-friendly coating specifically comprises the following steps:
(1) heating epoxy resin E-12, adding butyl acrylate, methacrylic acid and styrene monomer after the fluidity of the epoxy resin E-12 is increased to form a mixed monomer, adding distilled water after mixing octyl phenol polyoxyethylene ether and sodium dodecyl sulfate, slightly heating to dissolve an emulsifier, adding sodium bicarbonate to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a mixed monomer accounting for 15% of the total mass into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and the rest of the mixed monomer, the composite emulsion and the initiator when heating and raising the temperature, finishing dripping within 1.5h, raising the temperature to 85 ℃, reacting for 1h, and filtering after finishing the reaction to obtain epoxy modified acrylic resin emulsion;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Example 5
An epoxy modified acrylic acid environment-friendly paint for hardware parts comprises the following raw materials in parts by weight: 70 parts of epoxy modified acrylic resin, 0.6 part of methylene dinaphthalene sodium sulfonate, 0.8 part of propylene glycol phenyl ether, 1.5 parts of hydroxypropyl methyl cellulose, 2 parts of dimethylethanolamine, 4 parts of barium sulfate, 2.5 parts of calcium oxide, 1.5 parts of nano zinc oxide, 1 part of graphene oxide and 12 parts of water; the epoxy modified acrylic resin is prepared from epoxy resin E-20, butyl acrylate, methacrylic acid and styrene through ring-opening esterification reaction, and comprises the following raw materials in parts by weight: epoxy resin E-2018, butyl acrylate 12, methacrylic acid 18, styrene 25, octyl phenol polyoxyethylene ether 7.5, sodium dodecyl sulfate 2.5, potassium persulfate 1.2 and sodium bicarbonate 0.4.
A preparation method of an epoxy modified acrylic acid hardware fitting environment-friendly coating specifically comprises the following steps:
(1) heating epoxy resin E-20, adding butyl acrylate, methacrylic acid and styrene monomer after the fluidity of the epoxy resin E-20 is increased to form a mixed monomer, adding distilled water after mixing octyl phenol polyoxyethylene ether and sodium dodecyl sulfate, slightly heating to dissolve an emulsifier, adding sodium bicarbonate to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a mixed monomer accounting for 15% of the total mass into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and the rest of the mixed monomer, the composite emulsion and the initiator when heating and raising the temperature, finishing dripping for 2h, raising the temperature to 80 ℃, reacting for 2h, and filtering after the reaction is finished to obtain epoxy modified acrylic resin emulsion;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
Performance detection
The epoxy modified acrylic acid hardware parts environment-friendly paint prepared in the examples 1-5 is respectively sprayed on the surface of a steel plate with the thickness of 50mm multiplied by 0.25mm, the spraying thickness is 50 microns, the surface is dried at the temperature of 40 ℃ after the spraying is finished, the steel plate is put into a 90 ℃ oven for 2 hours, and the steel plate is taken out and placed at the normal temperature for 1 day.
1. Corrosion resistance
The steel plates are placed in four different media, namely 5% HCl (w/v), 5% NaOH (w/v), 3.5% NaCl (w/v) and distilled water for soaking according to the determination of reference standards GB/T9265-2009 and GB/T1083-2008, and the obtained data are shown in Table 1 when the paint films are observed to have the phenomena of bubbling, falling off, discoloration and the like.
TABLE 1 Corrosion resistance test results
2. Hardness of pencil
With reference to the national standard GB6739-2006 "determination of paint film hardness by the colored paint and varnish pencil method", a pencil with known hardness is used to scratch the paint film at a constant speed, and the hardness of the coating is expressed by the hardness of the pencil without leaving scratches. The hardness of the paint film can be expressed as 6B, 5B, 4B, 3B, 2B, HB, H, 2H, 3H, 4H, 5H and 6H from small to large, and the obtained data are shown in Table 2.
TABLE 2 Pencil hardness test results
| Group of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Hardness of pencil | 4H | 2H | 5H | 2H | 5H |
3. Paint film adhesion
Referring to GB9286-1988, test for marking grids of paint films of colored paint and varnish, mutually perpendicular scratches are marked on the paint film by a sharp cutting knife, 6 scratches are arranged vertically and horizontally, the interval between every two adjacent scratches is 1mm, the knife edge is kept perpendicular to a tinplate test piece during scratching, and the speed is 10-30 mm/s. After the scratch is finished, the brush is used for gently sweeping the scratch part for 3 times, at the moment, 25 grids with the side length of 1mm appear on the tin plate test piece, the scratch part is covered by a 3M transparent adhesive tape, and the adhesive tape and the paint film form 45 times. And slowly uncovering, and observing the number of the squares of the paint film adhered to the adhesive tape. According to the number of the fallen paint films, the adhesive force grades of the paint films are divided into six grades, namely, 0 grade, 1 grade, 2 grade, 3 grade, 4 grade, 5 grade and the like, wherein the adhesive force of the 0 grade is the best, and the adhesive force of the 5 grade is the worst.
TABLE 3 paint film adhesion test results
| Group of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Paint film adhesion | 0 | 2 | 1 | 2 | 0 |
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not exhaustive or limiting of the specific embodiments of the invention. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The epoxy modified acrylic acid environment-friendly paint for hardware parts is characterized by comprising the following raw materials in parts by weight: 60-80 parts of epoxy modified acrylic resin,
0.5 to 1 portion of methylene dinaphthalene sodium sulfonate,
0.5 to 1 portion of propylene glycol phenyl ether,
1-2 parts of hydroxypropyl methyl cellulose,
1-2 parts of Dimethyl Ethanolamine (DEMA),
3-6 parts of barium sulfate, namely barium sulfate,
2-3 parts of calcium oxide, namely,
1-2 parts of nano zinc oxide,
1-2 parts of graphene oxide,
10-15 parts of water;
the epoxy modified acrylic resin is prepared from epoxy resin and acrylic monomers through ring-opening esterification reaction, and comprises the following raw materials in parts by weight:
15-20 parts of epoxy resin,
40-60 parts of acrylic acid monomer,
5-10 parts of an emulsifying agent,
0.5 to 2 portions of initiator,
0.1-0.5 part of electrolyte.
2. The epoxy modified acrylic environment-friendly paint for hardware parts and accessories as claimed in claim 1, wherein the epoxy resin is one of E-51, E-44, E-20 and E-12.
3. The epoxy modified acrylic environment-friendly paint for hardware parts and accessories as claimed in claim 1, wherein the acrylic monomer comprises butyl acrylate, methacrylic acid and styrene.
4. The epoxy modified acrylic acid environment-friendly paint for hardware parts and accessories of claim 1, wherein the emulsifier is a nonionic emulsifier and an anionic emulsifier, and the weight ratio of the emulsifier to the emulsifier is 2-3: 1, mixing, wherein the nonionic emulsifier is octyl phenol polyoxyethylene ether, and the anionic emulsifier is sodium dodecyl sulfate.
5. The epoxy modified acrylic acid environment-friendly paint for hardware parts and accessories of claim 4, wherein the nonionic emulsifier and the anionic emulsifier are mixed according to a ratio of 2: 1 and mixing.
6. The epoxy modified acrylic acid hardware spare and accessory environment-friendly coating as claimed in claim 1, wherein the initiator is ammonium persulfate or potassium persulfate, and the electrolyte is sodium bicarbonate.
7. The preparation method of the epoxy modified acrylic acid hardware spare and accessory environment-friendly coating as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
(1) heating epoxy resin, adding an acrylic monomer to form a mixed monomer after the fluidity of the epoxy resin is increased, adding an emulsifier into distilled water, slightly heating to dissolve the emulsifier, adding an electrolyte to form a composite emulsifier, and adding an initiator into the distilled water for dissolving;
(2) adding a composite emulsion solution accounting for 50% of the total mass and a part of mixed monomers into a reactor, stirring and mixing uniformly, adding an initiator accounting for 50% of the total mass, and starting heating;
(3) synchronously dripping and remaining mixed monomer, composite emulsion and initiator when heating and raising the temperature, raising the temperature to 75-85 ℃ after dripping is finished, reacting for 1-2h, and filtering to obtain epoxy modified acrylic resin emulsion after the reaction is finished;
(4) mixing and dispersing sodium methylene dinaphthalene sulfonate, barium sulfate, calcium oxide, nano zinc oxide, graphene oxide and water to obtain mixed slurry A;
(5) and mixing and stirring the epoxy modified acrylic resin emulsion and the mixed slurry A uniformly, adding propylene glycol phenyl ether, hydroxypropyl methylcellulose and dimethylethanolamine, and stirring uniformly at a high speed to obtain the target environment-friendly coating.
8. The method for preparing the epoxy modified acrylic acid environment-friendly paint for hardware parts and accessories according to claim 7, wherein the mass of the mixed monomers added in the step (2) accounts for 10-20% of the total mass of the mixed monomers.
9. The preparation method of the epoxy modified acrylic acid environment-friendly paint for hardware parts and accessories according to claim 7, wherein in the step (3), the temperature is raised to 80 ℃, the reaction is carried out for 1.5h, and the monomer, the emulsion and the initiator are mixed for 1.5-2h, and then the dropwise addition is finished.
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