CN111974657A - Preparation method of colorful coating, colorful coating and lamp fitting - Google Patents
Preparation method of colorful coating, colorful coating and lamp fitting Download PDFInfo
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- CN111974657A CN111974657A CN202010865350.XA CN202010865350A CN111974657A CN 111974657 A CN111974657 A CN 111974657A CN 202010865350 A CN202010865350 A CN 202010865350A CN 111974657 A CN111974657 A CN 111974657A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/065—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
- B05D5/066—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones achieved by multilayers
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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
- 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
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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
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/29—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for multicolour effects
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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
- C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
Abstract
The invention provides a preparation method of a colorful coating, the colorful coating and a lamp fitting. The preparation method comprises the steps of pretreating a substrate; coating a primer with a specified color on a substrate; drying and curing the primer; coating a translucent finish paint containing colorful pearl powder on the primer paint; and drying and curing the finish paint to obtain the multi-color coating on the substrate. The multicolor coating on the substrate can be obtained by coating a primer of a specified color on the substrate, coating a semi-transparent finish containing the colorful pearl powder on the dried and cured primer, and drying and curing the finish. Under the irradiation of light, the pearl powder in the colorful coating can reflect light with different colors through different angles, and under the contrast of the primer with the specified color, the colorful coating can present various colors at different visual angles, so that the visual effect is enhanced.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a preparation method of a colorful coating, the colorful coating and a lamp fitting.
Background
In the prior art, the surface of a hardware workpiece (such as a hardware frame) is coated with a layer of a single color, for example, the color of the paint used for the layer may be white, black, or red. Because the color of the coating is single, the color of the hardware workpiece with the pattern layer is monotonous and stiff, and the hardware workpiece cannot generate color change and cannot meet the actual requirement.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a method of preparing a multicolor coating, and a lamp fitting.
It is an object of the present invention to provide a method for preparing a multicolor coating exhibiting various colors.
According to an aspect of an embodiment of the present invention, there is provided a method for preparing a multicolor coating, including:
pre-treating a substrate;
coating a primer of a specified color on the substrate;
drying and curing the primer;
coating a translucent topcoat comprising a colorful pearlescent powder on the primer;
and drying and curing the finish paint to obtain the multi-color coating on the substrate.
Optionally, the multi-colored pearlescent flakes are natural mica flakes coated with metal oxide.
Optionally, the natural mica flakes are flat in shape.
Optionally, the primer and topcoat are acrylic paints.
Optionally, the substrate is a metal substrate and the acrylic paint is a thermosetting acrylic paint.
Optionally, the topcoat comprises by weight: 50-70% of thermosetting acrylic resin, 10-18.5% of first solvent, 1-2% of flatting agent, 0.5-1% of defoaming agent and 15-30% of colorful pearl powder.
Optionally, the primer comprises by weight: 55-70% of thermosetting acrylic resin, 15-30% of coloring filler, 1-2% of flatting agent, 0.5-1% of defoaming agent and 10-28.5% of second solvent.
Optionally, the temperature for drying and curing the primer and the topcoat is 140-150 ℃.
Optionally, the substrate is a plastic substrate, and the acrylic resin paint is a thermoplastic acrylic resin paint.
Optionally, the topcoat comprises by weight: 50-70% of thermoplastic acrylic resin, 1-2% of flatting agent, 0.5-1% of defoaming agent, 15-30% of third solvent and 15-27% of colorful pearl powder.
Optionally, the primer comprises by weight: 50-70% of thermoplastic acrylic resin, 15-27% of coloring filler, 1-2% of flatting agent, 15-30% of fourth solvent and 0.5-1% of defoaming agent.
Optionally, the temperature for drying and curing the primer and the topcoat is 70-80 ℃.
Optionally, the coloring filler includes carbon black, titanium dioxide, aluminum powder, and/or copper powder.
According to another aspect of the embodiments of the present invention, there is also provided a multicolor coating prepared according to the preparation method of the multicolor coating described in any one of the preceding paragraphs.
According to yet another aspect of the embodiments of the present invention, there is also provided a lamp accessory including:
a substrate; and
a coating disposed on the substrate;
characterized in that the coating is a multicolored coating according to the preceding paragraphs.
In the preparation method of the multicolor coating of this embodiment, the multicolor coating on the substrate can be obtained by coating the primer of the specified color on the substrate, coating the translucent topcoat containing the pearlescent flakes on the dried and cured primer, and drying and curing the topcoat. Under the illumination of light, the pearl powder in the colorful coating can reflect the light of different colors through different angles, and under the setoff of the primer with the specified color, the colorful coating can present different colors at different visual angles, so that the appearance experience of the product is enriched, and the visual effect is enhanced.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a flow chart of a method of making a multicolor coating in accordance with one embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light fitting according to an embodiment of the invention.
Detailed Description
FIG. 1 is a flow chart of a method of making a multicolor coating in accordance with one embodiment of the present invention. Referring to fig. 1, the method for preparing a multicolor coating layer may include the following steps S102 to S110.
Step S102: the substrate is pretreated.
Step S104: a primer of a specified color is applied to the substrate.
Step S106: and drying and curing the primer.
Step S108: a translucent topcoat comprising a colorful pearlescent powder is applied over the primer.
Step S110: and drying and curing the finish paint to obtain the multi-color coating on the substrate.
In the preparation method of the multicolor coating of this embodiment, the multicolor coating on the substrate can be obtained by coating the primer of the specified color on the substrate, coating the translucent topcoat containing the pearlescent flakes on the dried and cured primer, and drying and curing the topcoat. Under the illumination of light, the pearl powder in the colorful coating can reflect the light of different colors through different angles, and under the setoff of the primer with the specified color, the colorful coating can present different colors at different visual angles, so that the appearance experience of the product is enriched, and the visual effect is enhanced.
In one embodiment of the invention, the pearlescent flakes are natural mica flakes coated with a metal oxide.
In this embodiment, the topcoat including natural mica flakes may be stirred to uniformly distribute the natural mica flakes in the topcoat. The natural mica flakes covered with the metal oxide can refract, reflect, and transmit light to express color and brightness. Among them, the kind of the metal oxide may be various, and specifically, for example, the metal oxide may be titanium dioxide, iron oxide, or the like. Some natural mica flakes may be covered with titanium dioxide and some natural mica flakes may be covered with iron oxide. Different metal oxides can refract, reflect and transmit light of different wavelengths to exhibit different color effects.
In one embodiment of the invention, the natural mica flakes are flat in shape. In the present embodiment, the specific meaning of the flat shape can be understood by those skilled in the art. The flat natural mica flakes have multiple faces, and different faces can reflect different colors of light to present different colors.
In one embodiment of the present invention, the primer and topcoat may be acrylic paints. The acrylic resin paint has the advantages of good corrosion resistance, high hardness, strong adhesive force, good gloss and color retention, and the like.
In one embodiment of the present invention, the substrate may be a metal substrate. The acrylic resin paint is thermosetting acrylic resin paint.
In the case where the substrate is a metal substrate and the acrylic paint is a thermosetting acrylic paint, the topcoat may include by weight: 50-70% of thermosetting acrylic resin, 10-18.5% of first solvent, 1-2% of flatting agent, 0.5-1% of defoaming agent and 15-30% of colorful pearl powder. The primer may include by weight: 55-70% of thermosetting acrylic resin, 15-30% of coloring filler, 1-2% of flatting agent, 0.5-1% of defoaming agent and 10-28.5% of second solvent. The first solvent and the second solvent can both comprise esters, alcohols, ketones and the like, and the actual application can be determined according to the components of the finish paint. The first solvent of the top coat and the second solvent of the primer may be the same or different, and this is not specifically limited in the embodiments of the present invention. In addition, in the process of preparing the finishing coat or the primer, when the dosage of other components is the lower limit of the occupancy ratio, the corresponding solvent can be adopted for supplement.
In one embodiment of the invention, the temperature of the drying cure of the primer and topcoat is 140-150 ℃ in the case where the substrate is a metal substrate and the acrylic lacquer is a thermosetting acrylic lacquer. The temperature is set in the range of 140-150 ℃ to accelerate the drying and curing of the primer and topcoat. The drying time can be set according to the actual application requirements, for example, when the temperature is set in the range of 140-150 ℃, the drying time can be 25-30 min. In addition, the temperature and time for drying and curing the primer and the topcoat may be the same or different, and this is not specifically limited in the embodiments of the present invention.
In one embodiment of the present invention, in the case where the substrate is a metal substrate and the acrylic paint is a thermosetting acrylic paint, the thickness of the primer coating may preferably be 9 to 12 μm, and the thickness of the topcoat coating may preferably be 10 to 14 μm.
In one embodiment of the present invention, in the case that the substrate is a metal substrate, the step of pretreating the substrate may include:
step 1: and (6) polishing. The substrate can be sanded by a sandpaper sander in this step. The polishing can be divided into two steps of rough polishing and fine polishing, wherein 180-mesh abrasive paper is adopted for the rough polishing, and 600-mesh abrasive paper is adopted for the fine polishing.
Step 2: and (6) degreasing. In the step, the substrate is soaked in the degreasing agent for a certain time at a certain temperature so as to remove the oil stains on the surface of the substrate. Specifically, for an aluminum substrate, soaking for 3-5min at normal temperature, wherein the content of free alkali in the degreasing agent is 12-18 pt; the aluminum degreasing agent comprises 20-40% of sulfuric acid, 15-25% of potassium fluoride, 1-2% of nonionic surfactant (RO (CH2CH20) nH) and 33-64% of water by weight. Soaking other metal substrates (such as iron substrate) except aluminum at 30-50 deg.C for 10-20min, wherein the content of free alkali in the degreasing agent is 15-25 pt; the degreasing agent comprises 8-16% by weight of a nonionic surfactant (RO (CH2CH20) nH) and sodium silicate.
And 3, step 3: and (5) washing for the first time. In the step, water with the pH value of 7-8 is used for cleaning for 1-2min at normal temperature to remove the residual degreasing agent.
And 4, step 4: and (4) removing rust. In the step, the substrate is soaked in a deruster solution with the acidity of 6-10pt for 10-20min at normal temperature to remove the rust on the substrate. The rust remover solution comprises 10-30% of ammonium citrate (C6H14N2O7) and 5-10% of surfactant (RO (CH2CH20)5H) by weight.
And 5, step 5: and (5) washing for the second time. In the step, water with the pH value of 5-6 is used for washing for 1-2min at normal temperature to remove redundant acid liquor.
And 6, step 6: and (5) washing with water for the third time. In the step, water with the pH value of 6-7 is used for washing for 1-2min at normal temperature, so that possible acid liquor is further removed, and the influence on the subsequent process is reduced as much as possible.
And 7, step 7: and (4) generating a coating. In the step, the substrate is soaked in a coating agent solution with the pH value of 4.6-5.2 for 3-5min at normal temperature, and a layer of ultrathin coating is generated on the surface of the substrate through physical adsorption. The formation of this coating promotes the adhesion of the paint film. The coating agent solution comprises 2-10% of fluozirconic acid (H2ZrF6), 1-2% of zinc nitrate (Zn (NO3)2) and 88-97% of water by weight.
And 8, step 8: and (5) washing with water for the fourth time. In the step, water with the pH value of 6-7 is used for cleaning for 1-2min at normal temperature to remove a small amount of residual coating agent so as to reduce the interference on the subsequent procedures.
Step 9: and (5) sealing. In the step, the substrate is soaked in a hole sealing agent solution with the pH value of 7-8 for 1-2min at normal temperature so as to passivate the filmed substrate and enhance the stability of the substrate. The sealant solution contains 10-30% of triethanolamine (C6H15NO3) and 70-90% of water by weight.
Step 10: and (5) drying. In this step, drying is carried out at 150-160 deg.C for 30min to remove moisture from the substrate.
In one embodiment of the present invention, the substrate is a plastic substrate. The acrylic resin paint is thermoplastic acrylic resin paint.
In the case where the substrate is a plastic substrate and the acrylic paint is a thermoplastic acrylic paint, the topcoat may include by weight: 50-70% of thermoplastic acrylic resin, 1-2% of flatting agent, 0.5-1% of defoaming agent, 15-30% of third solvent and 15-27% of colorful pearl powder. The primer may include by weight: 50-70% of thermoplastic acrylic resin, 15-27% of coloring filler, 1-2% of flatting agent, 15-30% of fourth solvent and 0.5-1% of defoaming agent.
Wherein the third solvent may include 45% butyl ester, 30% isopropyl alcohol and 25% methyl ethyl ketone by weight. The fourth solvent may include 30% ethyl ester, 25% butyl ester, 30% isopropyl alcohol, and 15% methyl ethyl ketone by weight. In addition, in the process of preparing the finishing coat or the primer, when the dosage of other components is the lower limit of the occupancy ratio, the corresponding solvent can be adopted for supplement.
In one embodiment of the invention, the temperature for the drying and curing of the primer and topcoat is 70-80 ℃ in the case where the substrate is a plastic substrate and the acrylic lacquer is a thermoplastic acrylic lacquer. The temperature is set in the range of 70-80 ℃ to accelerate the drying and curing of the primer and topcoat. The drying time can be set according to the actual application requirements, for example, when the temperature is set in the range of 70-80 ℃, the drying time can be 25-30 min. In addition, the temperature and time for drying and curing the primer and the topcoat may be the same or different, and this is not specifically limited in the embodiments of the present invention.
In one embodiment of the present invention, the color filler may include carbon black, titanium dioxide, aluminum powder, and/or copper powder. Different coloring fillers can endow the primer with different colors, and the color development effect of the colorful coating can be changed by selecting the coloring fillers with different colors. Specifically, for example, carbon black is selected as a coloring filler, so that the primer can be black; titanium dioxide is selected as a coloring filler, so that the primer can be white; aluminum powder is selected as a coloring filler, so that the primer can be silvery; copper powder is selected as a coloring filler, so that the primer can be golden, and the like. The selection of the particular coloring filler is not particularly limited in the present invention. By appropriate selection of the coloring filler in the primer, the color of the primer can be changed, thereby enhancing the color diversity of the resulting multicolor coating.
In one embodiment of the present invention, in the case where the substrate is a plastic substrate and the acrylic paint is a thermoplastic acrylic paint, the primer and the topcoat may be preferably applied in a thickness of 10 to 15 μm. The primer and the topcoat may be applied in the same thickness or different thicknesses, and the embodiment of the present invention is not particularly limited thereto.
In one embodiment of the present invention, the primer and topcoat may be applied by spraying. Wherein, the spraying conditions can be as follows: the spraying pressure is 0.3-0.6MPa, the spraying distance (i.e. the distance between the nozzle of the spray gun and the surface of the substrate to be coated) is 250-300mm, and the spraying flow (i.e. the flow of the primer or topcoat to be sprayed) is 50-100 g/min.
In one embodiment of the present invention, in the case that the substrate is a plastic substrate and the acrylic paint is a thermoplastic acrylic paint, the step of pretreating the substrate may include:
step 1: and (4) removing oil. In the step, the spinning cloth can be dipped with the degreasing agent to wipe the substrate for degreasing. Wherein the spun cloth is dust-free spun cloth subjected to dust removal treatment. The main component of the oil removing agent can be isopropanol. The content of isopropanol in the oil removing agent can reach 100 percent at most.
Step 2: and (5) removing dust. In the step, the substrate is dedusted by an electrostatic gun under the air pressure of 0.6-1.0 pa.
And 3, step 3: and (4) preheating. In this step, the substrate may be preheated by an oven at a temperature of 50-55 ℃ for 2-4 min.
According to any one or a combination of the above preferred embodiments, the multicolor coatings produced have the following performance criteria:
(1) according to the GB9286-98 hundred-grid test, the adhesion of the colorful coating is qualified. Specifically, for example, 1mm by 1mm, 3M600 gummed paper was vertically pulled, and 4B was acceptable.
(2) Alcohol abrasion resistance test: the dust-free cloth/gauze is stuck with alcohol, and the dust-free cloth/gauze is loaded with 500gf to be wiped back and forth for 50 times, so that the bottom leakage is qualified.
(3) The hardness of the multicolor coating is qualified according to the paint film hardness test of GB/T6739-2006. Specifically, for example, the Chinese-brand pencil (plastic HB, hardware 2H) is pushed forward by 1-2cm at an angle of 45 degrees at 500gf, and the action is repeated for more than 5 times when the place is changed, so that the paint film is not qualified.
(4) The corrosion resistance is qualified. The salt spray test is carried out under the conditions of 35 +/-2 ℃, 85 percent of humidity, 6.5-7.2 of pH value and 5 +/-1 percent of NaCl solution, and the obvious fading, foaming and falling-off are avoided.
(5) The alternating resistance is qualified. The alternating damp-heat test is carried out under the alternating conditions of 55 ℃/95% RH and 25 ℃/80% RH, the high-temperature and low-temperature states are respectively stored for 11.5h, the temperature switching time is 60min, and the power is supplied for 1h at 25 ℃ every day. After 6 cycles, the colorful coating has no bad effects such as bubbling and shedding, and the color difference delta E is less than or equal to 2.
(6) The thermal shock resistance is qualified. The samples were stored for 15 cycles at-20 ℃ and 80 ℃ without being lit indoors for 1 h. Storing at-40 deg.C and 80 deg.C for 1h respectively without lighting outdoors, and performing 20 cycles. And (3) carrying out 50 cycles of plastic-coated aluminum structural parts at 20 ℃ below zero for 20min and 120 ℃ for 20 min. Wherein the temperature conversion time is less than 30 min. After the test is finished, the colorful coating has no defects of bubbling, falling off and the like, and the color difference delta E is less than or equal to 2.
The tests of the (2), (4), (5) and (6) in the performance indexes can refer to GB/T33721-2017LED lamp reliability test method.
Based on the same technical concept, the embodiment of the invention also provides a multicolor coating prepared by the method for preparing the multicolor coating according to any embodiment or the combination of the embodiments. The colorful coating can present various colors under different visual angles, and the visual effect is enhanced.
Based on the same technical concept, the embodiment of the invention also provides a lamp accessory. Fig. 2 shows a schematic structural diagram of a lamp accessory 100 according to an embodiment of the invention. Referring to fig. 2, a light fixture accessory 100 may generally include a substrate 101, and a coating 102 disposed on the substrate 101. The coating 102 is a multicolor coating 102 according to any embodiment or combination of embodiments described above. It should be noted that fig. 2 is not to scale. By providing the multi-color coating 102 on the substrate 101 of the light fitting 100, the light fitting 100 can be given a good appearance, and can be rendered with different colors at different viewing angles, thereby enhancing the visual experience.
The above embodiments can be combined arbitrarily, and according to any one of the above preferred embodiments or a combination of multiple preferred embodiments, the embodiments of the present invention can achieve the following beneficial effects:
in the preparation method of the multicolor coating of this embodiment, the multicolor coating on the substrate can be obtained by coating the primer of the specified color on the substrate, coating the translucent topcoat containing the pearlescent flakes on the dried and cured primer, and drying and curing the topcoat. Under the irradiation of light, the pearl powder in the colorful coating can reflect light with different colors through different angles, and under the contrast of the primer with the specified color, the colorful coating can present various colors at different visual angles, so that the visual effect is enhanced.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (15)
1. A method of producing a multi-color coating, comprising:
pre-treating a substrate;
coating a primer of a specified color on the substrate;
drying and curing the primer;
coating a translucent topcoat comprising a colorful pearlescent powder on the primer;
and drying and curing the finish paint to obtain the multi-color coating on the substrate.
2. The method according to claim 1, wherein said pearlescent flakes are natural mica flakes covered with metal oxide.
3. The method according to claim 2, wherein the natural mica flakes are flat in shape.
4. The method of claim 1, wherein the primer and topcoat are acrylic paints.
5. The method of claim 4, wherein the substrate is a metal substrate and the acrylic paint is a thermosetting acrylic paint.
6. The method of claim 5, wherein the topcoat comprises, by weight: 50-70% of thermosetting acrylic resin, 10-18.5% of first solvent, 1-2% of flatting agent, 0.5-1% of defoaming agent and 15-30% of colorful pearl powder.
7. The method of manufacturing according to claim 5, wherein the primer comprises, by weight: 55-70% of thermosetting acrylic resin, 15-30% of coloring filler, 1-2% of flatting agent, 0.5-1% of defoaming agent and 10-28.5% of second solvent.
8. The method of claim 5, wherein the temperature for drying and curing the primer and the topcoat is 140-150 ℃.
9. The method of claim 4, wherein the substrate is a plastic substrate and the acrylic paint is a thermoplastic acrylic paint.
10. The method of claim 9, wherein the topcoat comprises, by weight: 50-70% of thermoplastic acrylic resin, 1-2% of flatting agent, 0.5-1% of defoaming agent, 15-30% of third solvent and 15-27% of colorful pearl powder.
11. The method of producing according to claim 9, wherein the primer includes, by weight: 50-70% of thermoplastic acrylic resin, 15-27% of coloring filler, 1-2% of flatting agent, 15-30% of fourth solvent and 0.5-1% of defoaming agent.
12. The method of claim 9, wherein the temperature of the drying and curing of the primer and topcoat is 70-80 ℃.
13. The method according to claim 7 or 11, wherein the coloring filler comprises carbon black, titanium dioxide, aluminum powder and/or copper powder.
14. Multicolor coatings prepared by the process for the preparation of multicolor coatings according to any one of claims 1 to 13.
15. A light fitting, comprising:
a substrate; and
a coating disposed on the substrate;
characterized in that said coating is a multicolor coating according to claim 14.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113714066A (en) * | 2021-09-16 | 2021-11-30 | 曼德电子电器有限公司 | Color-changeable workpiece and preparation method and system thereof |
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Application publication date: 20201124 |