CN111171659B - Water-based environment-friendly paint for automobile exterior and preparation method thereof - Google Patents
Water-based environment-friendly paint for automobile exterior and preparation method thereof Download PDFInfo
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- CN111171659B CN111171659B CN202010114370.3A CN202010114370A CN111171659B CN 111171659 B CN111171659 B CN 111171659B CN 202010114370 A CN202010114370 A CN 202010114370A CN 111171659 B CN111171659 B CN 111171659B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 239000003973 paint Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title description 4
- 239000006247 magnetic powder Substances 0.000 claims abstract description 29
- 229910052701 rubidium Inorganic materials 0.000 claims abstract description 29
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims abstract description 29
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000004209 oxidized polyethylene wax Substances 0.000 claims abstract description 13
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims abstract description 13
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 12
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 10
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims abstract description 10
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 10
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 10
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000005389 magnetism Effects 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 53
- 238000002156 mixing Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 claims description 8
- DAMJCWMGELCIMI-UHFFFAOYSA-N benzyl n-(2-oxopyrrolidin-3-yl)carbamate Chemical compound C=1C=CC=CC=1COC(=O)NC1CCNC1=O DAMJCWMGELCIMI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001723 curing Methods 0.000 claims description 8
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 8
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 8
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 4
- 239000012298 atmosphere Substances 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
-
- 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
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C08K2201/01—Magnetic additives
Abstract
The invention relates to the field of automobile coatings, in particular to a water-based environment-friendly paint; the composite material comprises the following components in parts by weight: 10-40 parts of water-based acrylic resin, 0.5-2.0 parts of tributyl phosphate, 0.5-2.0 parts of dioctyl phthalate, 5-10 parts of ethylene glycol, 20-25 parts of rubidium magnetic powder, 0.3-1.5 parts of carboxymethyl cellulose, 4-6 parts of oxidized polyethylene wax, 87-150 parts of water and 23-42 parts of water-based wax; the environment-friendly paint is water paint, adopts water as a solvent, and eliminates fire hazard during construction; the pollution to the atmosphere is reduced; the construction tool can be cleaned by washing, so that the construction tool is convenient and safe; when the surface of a steel structure part of an automobile is coated, since rubidium magnetic powder has magnetism, even if the surface of the steel structure part is uneven, the rubidium magnetic powder can be actively adsorbed on the surface of the part, and the surface tension of water can be destroyed by the adsorption movement of the rubidium magnetic powder so as to pull water paint into micro concave parts and blind holes.
Description
Technical Field
The invention relates to the field of automobile coatings, in particular to water-based environment-friendly paint.
Background
The water-based environment-friendly paint takes water as a solvent, so that a large amount of resources are saved; fire hazard during construction is eliminated; the pollution to the atmosphere is reduced; only a small amount of low-toxicity alcohol ether organic solvent is adopted, so that the operation environment condition is improved. The organic solvent (accounting for 10% -15% of the paint) of the general water paint has remarkable effects of reducing pollution and saving resources. The water-based paint can be directly coated and constructed on wet surfaces and in a wet environment; the coating has good adaptability to the surface of the material and strong adhesive force. The coating tool can be cleaned by water, so that the consumption of cleaning solvent is greatly reduced.
But its drawbacks are also evident: there are many welded sites in the steel structural component of car, the welding point is necessarily rugged, even have some tiny sunken blind holes, can cover tiny blind holes after the paint is coated, form the blank after solidifying, and the water paint can form the shrinkage cavity at this blind hole mouth when solidifying because of the problem of self tension, and paint or ordinary water paint are difficult to really carry out the film-forming protection to the position in the blind hole. Some enterprises adopt chemical agents such as surfactants to reduce the surface tension of water paint, the technical scheme can naturally reduce the water tension, but obviously, the possibility of environmental pollution in the use process is increased by adding more chemical agents.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the environment-friendly water paint for the automobile and also provides a preparation method of the water paint.
The technical scheme of the invention is as follows:
the water-based environment-friendly paint for the automobile exterior is characterized by comprising the following components in parts by weight:
10-40 parts of aqueous acrylic resin, 0.5-2.0 parts of tributyl phosphate, 0.5-2.0 parts of dioctyl phthalate, 5-10 parts of ethylene glycol, 20-25 parts of rubidium magnetic powder, 0.3-1.5 parts of carboxymethyl cellulose, 4-6 parts of oxidized polyethylene wax, 87-150 parts of water and 23-42 parts of aqueous wax (model E-842N 35).
In one embodiment, the automobile exterior water-based environment-friendly paint comprises the following components in parts by weight:
39 parts of aqueous acrylic resin, 1 part of tributyl phosphate, 1 part of dioctyl phthalate, 7 parts of ethylene glycol, 25 parts of rubidium magnetic powder, 1.5 parts of carboxymethyl cellulose, 5 parts of oxidized polyethylene wax, 125 parts of water and 32 parts of aqueous wax.
In a preferred embodiment, the automobile exterior water-based environment-friendly paint comprises the following components in parts by weight:
39 parts of aqueous acrylic resin, 1 part of tributyl phosphate, 1 part of dioctyl phthalate, 7 parts of ethylene glycol, 25 parts of rubidium magnetic powder, 1.5 parts of carboxymethyl cellulose, 5 parts of sodium hexametaphosphate, 5 parts of oxidized polyethylene wax, 125 parts of water, 32 parts of aqueous wax, 11 parts of stannic chloride and 7 parts of antimony trichloride.
The preparation method of the water-based environment-friendly paint for the automobile surface is characterized by comprising the following steps of:
1) 10-40 parts of water-based acrylic resin, 0.5-2.0 parts of tributyl phosphate, 0.5-2.0 parts of dioctyl phthalate, 5-10 parts of ethylene glycol, 20-25 parts of rubidium magnetic powder, 0.3-1.5 parts of carboxymethyl cellulose, 4-6 parts of oxidized polyethylene wax, 87-150 parts of water and 23-42 parts of water-based wax are weighed for standby;
2) Mixing the water-based acrylic resin with two thirds of water, and then placing the mixture in a water bath at 95 ℃ for heat preservation;
3) Keeping the temperature for 10 minutes, and continuously stirring in the process of keeping the temperature;
4) Adding tributyl phosphate, dioctyl phthalate, glycol, carboxymethyl cellulose and water-based wax, stirring and mixing to prepare a liquid a, and cooling to 75 ℃;
5) Stirring and mixing the rest water, rubidium magnetic powder and oxidized polyethylene wax in a water bath at 75 ℃ to obtain a suspension, wherein the suspension is the solution b;
6) And (3) stirring and mixing the solution a and the solution b in a water bath at the temperature of 75 ℃ to obtain a finished product.
Wherein, step 3 adopts the mixer to stir, and stirring rate is 40 rpm. The stirring rotation speed is slower, because the water-based acrylic resin is specially designed for water solubility, the water solubility and the dispersibility are better, the water-based acrylic resin can be well dissolved by slightly stirring, and a large amount of bubbles can be generated due to the excessively high rotation speed.
And (4) stirring by using a stirrer, wherein the stirring speed is 60 revolutions per minute, and the stirring time is 20 minutes. The stirring speed is slightly increased to dissolve or disperse the material, but still controlled at a lower speed, with less air bubbles.
And (5) stirring by a stirrer with plastic blades or aluminum blades, wherein the stirring speed is 1000 revolutions per minute, the stirring time is 5 minutes, and then defoaming by ultrasonic waves and skimming foam on the liquid surface. The rubidium magnetic powder has magnetism, and the common stainless steel stirrer is very easy to adsorb the rubidium magnetic powder during stirring, so that nonmagnetic plastics or aluminum and other materials are adopted as stirring paddles. In addition, the high-speed stirring is beneficial to the dispersion of the rubidium magnetic powder, and of course, the dispersibility of the oxidized polyethylene wax further improves the dispersion degree of the rubidium magnetic powder in the liquid and reduces the aggregation of the rubidium magnetic powder.
And (3) stirring in the step (6) by using a stirrer with a plastic blade or an aluminum blade, wherein the stirring speed is 60 revolutions per minute, the stirring time is 10 minutes, and ultrasonic dispersion is adopted for 5 minutes after stirring is completed. The stirring is to mix the solution a and the solution b, and the ultrasonic dispersion is to further improve the dispersion degree of the rubidium magnetic powder in the solution.
In a preferred embodiment, in the step 1, 5 parts of sodium hexametaphosphate, 11 parts of tin tetrachloride and 7 parts of antimony trichloride are weighed, and in the step 5, sodium hexametaphosphate, tin tetrachloride and antimony trichloride are mixed with water, rubidium magnetic powder and oxidized polyethylene wax in a water bath at 75 ℃ to form a suspension, which is the solution b. The scheme has the advantages that: the sodium hexametaphosphate absorbs water to form colloid, so that the whole liquid presents certain glue property, rubidium magnetic powder is mechanically stirred or ultrasonically dispersed at each position of the glue, and aggregation is not easy to occur due to the limitation of the glue. In addition, tin tetrachloride, antimony trichloride and rubidium magnetic powder are dispersed together, a heat conduction system is built by three metal substances together, and the final effect is that the environment-friendly paint has good heat conduction and heat dissipation effects after film formation.
The beneficial effects of the invention are as follows: the environment-friendly paint is water paint, adopts water as a solvent, and eliminates fire hazard during construction; the pollution to the atmosphere is reduced; the construction tool can be cleaned by washing, so that the construction tool is convenient and safe; when the surface of a steel structure part of an automobile is coated, since rubidium magnetic powder has magnetism, even if the surface of the steel structure part is uneven, the rubidium magnetic powder can be actively adsorbed on the surface of the part, and the surface tension of water can be destroyed by the adsorption movement of the rubidium magnetic powder so as to pull water paint into micro concave parts and blind holes.
Drawings
Fig. 1 is a schematic diagram of the present invention.
In the figure, 1, automobile parts; 2. a blind hole; 3. and (5) a paint layer.
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
example 1
1) Weighing 39 parts of water-based acrylic resin, 1 part of tributyl phosphate, 1 part of dioctyl phthalate, 7 parts of ethylene glycol, 25 parts of rubidium magnetic powder, 1.5 parts of carboxymethyl cellulose, 5 parts of oxidized polyethylene wax, 125 parts of water and 32 parts of water-based wax for later use;
2) Mixing the water-based acrylic resin with two thirds of water, and then placing the mixture in a water bath at 95 ℃ for heat preservation;
3) Keeping the temperature for 10 minutes, and continuously stirring in the process of keeping the temperature;
4) Adding tributyl phosphate, dioctyl phthalate, glycol, carboxymethyl cellulose and water-based wax, stirring and mixing to prepare a liquid a, and cooling to 75 ℃;
5) Stirring and mixing the rest water, rubidium magnetic powder and oxidized polyethylene wax in a water bath at 75 ℃ to obtain a suspension, wherein the suspension is the solution b;
6) And (3) stirring and mixing the solution a and the solution b in a water bath at the temperature of 75 ℃ to obtain a finished product.
Wherein, step 3 adopts the mixer to stir, and stirring rate is 40 rpm.
And (4) stirring by using a stirrer, wherein the stirring speed is 60 revolutions per minute, and the stirring time is 20 minutes.
And (5) stirring by a stirrer with plastic blades or aluminum blades, wherein the stirring speed is 1000 revolutions per minute, the stirring time is 5 minutes, and then defoaming by ultrasonic waves and skimming foam on the liquid surface.
And (3) stirring in the step (6) by using a stirrer with a plastic blade or an aluminum blade, wherein the stirring speed is 60 revolutions per minute, the stirring time is 10 minutes, and ultrasonic dispersion is adopted for 5 minutes after stirring is completed.
Example 2
In the step 1, 5 parts of sodium hexametaphosphate, 11 parts of tin tetrachloride and 7 parts of antimony trichloride are weighed, and in the step 5, the sodium hexametaphosphate, the tin tetrachloride, the antimony trichloride, water, rubidium magnetic powder and oxidized polyethylene wax are stirred and mixed into a suspension in a water bath at 75 ℃ to obtain the liquid b. Other steps of this embodiment are the same as those of embodiment 1.
The construction method comprises the following steps:
firstly, uniformly coating the environment-friendly paint on the surface of an automobile part, such as a vehicle door, wherein various welding sites and even blind holes are automatically adhered to the surface of the automobile part because the environment-friendly paint contains rubidium magnetic powder (the principle is shown in figure 1, the environment-friendly paint is coated on the surface of the automobile part 1 to form a paint layer 3, the paint layer is continuously adhered to the inside of the blind holes 2 along the openings of the blind holes 2 under the magnetic influence of the rubidium magnetic powder, the thickness of the paint layer is easily understood and limited, the blind holes which can be covered by the paint layer cannot be completely covered if the thickness is too large, a user can realize the covering through coating at the welding sites for a plurality of times), and a first paint layer is formed by low-temperature curing (75 ℃);
a second step of coating a second paint layer, and curing at a low temperature (75 ℃) to form the second paint layer;
thirdly, coating a third paint layer, and curing at a low temperature (75 ℃) to form the third paint layer;
and fourthly, placing the automobile part into a drying room for high-temperature curing (the high-temperature baking temperature for automobile spraying is usually 150 ℃), and because the rubidium magnetic powder can be demagnetized at 80 ℃, all paint layers lose magnetism in the high-temperature curing process, and the influence on the magnetic performance of the automobile part is avoided.
Durability experiment:
the paint layers obtained by curing the conventional water-based paint purchased in the market and used in the example 1 and the example 2 are subjected to a high-temperature and high-humidity resistance experiment, and the experiment standard is GB/T1740-2007.
From this, it is clear that the paint layer obtained by the present invention has the basic film-forming and adhesion functions of general automotive water paint.
The foregoing embodiments and description have been provided merely to illustrate the principles and best modes of carrying out the invention, and various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. The construction method of the water-based environment-friendly paint for the automobile outer surface is characterized by comprising the following steps of:
s1, preparing an automobile exterior water-based environment-friendly paint:
1) Weighing 39 parts of water-borne acrylic resin, 1 part of tributyl phosphate, 1 part of dioctyl phthalate, 7 parts of ethylene glycol, 25 parts of rubidium magnetic powder, 1.5 parts of carboxymethyl cellulose, 5 parts of oxidized polyethylene wax, 125 parts of water, 32 parts of water-borne wax, 5 parts of sodium hexametaphosphate, 11 parts of stannic chloride and 7 parts of antimony trichloride for later use;
2) Mixing the water-based acrylic resin with two thirds of water, and then placing the mixture in a water bath at 95 ℃ for heat preservation;
3) Keeping the temperature for 10 minutes, and continuously stirring in the process of keeping the temperature;
4) Adding tributyl phosphate, dioctyl phthalate, glycol, carboxymethyl cellulose and water-based wax, stirring and mixing to prepare a liquid a, and cooling to 75 ℃;
5) Stirring and mixing sodium hexametaphosphate, stannic chloride and antimony trichloride with the rest water, rubidium magnetic powder and oxidized polyethylene wax in a water bath at 75 ℃ to obtain a suspension, wherein the suspension is liquid b;
6) Stirring and mixing the solution a and the solution b in a water bath at the temperature of 75 ℃ to obtain a finished product;
wherein, the step 3) adopts a stirrer to stir, and the stirring speed is 40 revolutions per minute;
wherein, the step 4) adopts a stirrer to stir, the stirring speed is 60 revolutions per minute, and the stirring time is 20 minutes;
wherein, the step 5) adopts a stirrer with a plastic blade or an aluminum blade to stir at a stirring speed of 1000 revolutions per minute for 5 minutes, and then adopts ultrasonic waves to defoam and skim foam on the liquid surface;
wherein, the step 6) adopts a stirrer with a plastic blade or an aluminum blade to stir, the stirring speed is 60 revolutions per minute, the stirring time is 10 minutes, and ultrasonic dispersion is adopted for 5 minutes after the stirring is completed;
s2, construction:
uniformly coating the environment-friendly paint obtained in the step s1 on the surface of an automobile part, attaching a paint layer to the inside of a blind hole along the opening of the blind hole, and curing at 75 ℃ to form a first paint layer;
step two, coating a second paint layer, and curing at 75 ℃ to form the second paint layer;
thirdly, coating a third paint layer, and curing at 75 ℃ to form the third paint layer;
and fourthly, placing the automobile part into a drying room, wherein the baking temperature is 150 ℃, and all paint layers lose magnetism.
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| CN202010114370.3A CN111171659B (en) | 2020-02-24 | 2020-02-24 | Water-based environment-friendly paint for automobile exterior and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010114370.3A CN111171659B (en) | 2020-02-24 | 2020-02-24 | Water-based environment-friendly paint for automobile exterior and preparation method thereof |
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| CN111171659A CN111171659A (en) | 2020-05-19 |
| CN111171659B true CN111171659B (en) | 2024-02-06 |
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