Composite coating and vehicle

Abstract

The invention relates to the technical field of coatings, aims to solve the technical problem that some known coatings are poor in color decoration, and provides a composite coating and a vehicle. The composite coating comprises a bottom layer, a first coloring paint layer and a second coloring paint layer. The bottom layer is used for being arranged on a base material and combined with the base material. The first coloring paint layer is arranged on the surface of the bottom layer and comprises acrylic resin, polyester resin, amino resin, a first coloring material and a first solvent. The second coloring paint layer is arranged on the surface of the first coloring paint layer and comprises acrylic resin, polyester resin, amino resin, a second coloring material and a second solvent, and the second coloring material is different from the first coloring material. The preparation method has the beneficial effect that the decorative property of the composite coating is improved.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to composite coatings and vehicles. Background Art

[0002] Paint is usually used to decorate and protect the car body and exterior parts, such as the car body and bumper, spoiler, rearview mirror, door handle, etc. The desired color effect can be obtained by adding pigments to the paint. Some existing coatings have the problem of poor decorative properties. Summary of the invention

[0003] The present application provides a composite coating and a vehicle to solve the technical problem that some known coatings have poor decorative properties.

[0004] The present application provides a composite coating, which is applied to a substrate of a vehicle, and the composite coating includes a base layer, a first colored paint layer, and a second colored paint layer. The base layer is used to be arranged on the substrate and combined with the substrate. The first colored paint layer is arranged on the surface of the base layer, and the first colored paint layer includes acrylic resin, polyester resin, amino resin, a first colorant, and a first solvent. The second colored paint layer is arranged on the surface of the first colored paint layer, and the second colored paint layer includes acrylic resin, polyester resin, amino resin, a second colorant, and a second solvent, and the second colorant is different from the first colorant.

[0005] According to the composite coating of the present application, the bottom layer can be firmly bonded to the surface of the substrate, thereby improving the bonding firmness of the composite coating on the surface of the substrate, and further improving the bonding firmness of the first colored paint layer and the second colored paint layer on the substrate. The first colored paint layer can provide a base color for the second colored paint layer through the first coloring material, and the second coloring material of the second colored paint layer is different from the first coloring material, so that different colors can be displayed on the top of the composite coating, and because it is on the surface of the first colored paint layer, when the composite coating is observed from different angles, the color of the composite coating can change, thereby giving the user a dazzling visual perception and improving the color decorativeness of the coating.

[0006] In one possible implementation: The components in the first colored paint layer are calculated by mass percentage as follows: 40% to 60% acrylic resin, 10% to 20% polyester resin, 7% to 17% amino resin, 15% to 30% first colorant, and 5% to 15% first solvent.

[0007] In one possible implementation: The thickness of the first colored paint layer is in the range of 10 μm to 20 μm.

[0008] In one possible implementation: The components in the second colored paint layer are calculated by mass percentage as follows: 30% to 60% acrylic resin, 1% to 10% polyester resin, 10% to 30% amino resin, 6% to 12% second colorant, and 10% to 30% second solvent.

[0009] In one possible implementation: The thickness of the second colored paint layer is in the range of 6 μm to 15 μm.

[0010] In one possible implementation: The bottom layer includes a primer coating, a putty layer and a mid-coat coating. The primer coating is disposed on the substrate. The putty layer is disposed on the surface of the primer coating. The mid-coat coating is disposed on the surface of the putty layer.

[0011] In one possible implementation: The bottom layer also includes a phosphating layer, which is disposed on the surface of the substrate after being treated with a phosphating solution, and the primer coating is disposed on the surface of the phosphating layer.

[0012] In one possible implementation: The composite coating also includes a surface layer, which is arranged on the surface of the second colored paint layer, and includes fluorine-modified hydroxy acrylic resin, polyester resin, anti-sagging resin, anti-fouling additive, amino resin and surface solvent.

[0013] In one possible implementation: The components in the surface layer are calculated by mass percentage as follows: 20% to 40% of fluorine-modified hydroxy acrylic resin, 5% to 20% of polyester resin, 15% to 40% of anti-sagging resin, 1% to 8% of stain-resistant additive, 15% to 40% of amino resin, and 10% to 30% of surface solvent.

[0014] The present application also provides a vehicle, comprising a substrate and the aforementioned composite coating, wherein the composite coating is coated on the surface of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic structural diagram of a vehicle according to an embodiment of the present application.

[0017] Figure 2 This is a schematic diagram of the structure of a composite coating according to an embodiment of the present application.

[0018] Description of main component symbols: Composite coating 100 Bottom 10 Primer coat 11 Putty layer 12 Middle coating 13 Phosphate layer 14 First coloring paint layer 20 Second coloring paint layer 30 Surface 40 Vehicle 200 Substrate 201 The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0022] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0023] See also Figure 1 The present embodiment provides a vehicle 200, including a substrate 201 and a composite coating 100. The substrate 201 can be a sheet metal structure of the vehicle 200. The material of the substrate 201 can be metal, such as any one of a carbon steel plate, a galvanized plate, and an aluminum plate. In other embodiments, the material of the substrate 201 can also be plastic.

[0024] In some embodiments, the thickness of the substrate 201 ranges from 0.3 mm to 1.5 mm. In this embodiment, the thickness of the substrate 201 can be any one of 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, and 1.5 mm.

[0025] See also Figure 2 The composite coating 100 includes a base layer 10, a first colored paint layer 20, and a second colored paint layer 30. The base layer 10 is used to be disposed on a substrate 201 and combined with the substrate 201. The first colored paint layer 20 is disposed on the surface of the base layer 10, and the first colored paint layer 20 includes acrylic resin, polyester resin, amino resin, a first colorant, and a first solvent. The second colored paint layer 30 is disposed on the surface of the first colored paint layer 20, and the second colored paint layer 30 includes acrylic resin, polyester resin, amino resin, a second colorant, and a second solvent, and the second colorant is different from the first colorant.

[0026] According to the composite coating 100 of this embodiment, the bottom layer 10 can be firmly bonded to the surface of the substrate 201, thereby improving the bonding firmness of the composite coating 100 on the surface of the substrate 201, and further improving the bonding firmness of the first colored paint layer 20 and the second colored paint layer 30 on the substrate 201. The first colored paint layer 20 can provide a base color for the second colored paint layer 30 through the first coloring material, and the second coloring material of the second colored paint layer 30 is different from the first coloring material, so that different colors can be displayed on the top of the composite coating 100, and because it is on the surface of the first colored paint layer 20, when the composite coating 100 is observed from different angles, the color of the composite coating 100 can change, thereby giving the user a dazzling visual perception and improving the color decorativeness of the coating.

[0027] In addition, acrylic resin, polyester resin and amino resin all have good film-forming properties and can form a film with a stable thickness on the surface of the base layer 10 .

[0028] In some embodiments, the first coloring material can be a carbon black slurry, and the first colored paint layer 20 is a high-temperature black paint layer. In other embodiments, the first coloring material can also be other black pigments, or coloring materials of other colors. The first coloring material is black, which can highlight the color of the second coloring material, thereby improving the decorativeness of the composite coating 100.

[0029] In some embodiments, the second coloring material can be crystal pearls, and the second colored paint layer 30 is a high-temperature crystal pearl paint layer. The materials of the crystal pearls include titanium dioxide, mica, and tin dioxide. The components in the second coloring material are calculated by mass percentage: titanium dioxide 40% to 45%, mica 50% to 60%, and tin dioxide less than 5%.

[0030] In this way, the high-temperature black paint layer and the high-temperature crystal pearl paint layer can collaboratively achieve a large difference in color between the front and side surfaces, while giving people a dazzling visual enjoyment. In addition, the second coloring paint layer 30 can also be replaced with different second coloring materials according to actual needs to meet different color perception requirements. For example, the second coloring material can be set as a toner of other structures. And the toner can be made of metal inorganic substances.

[0031] In some embodiments, the high-temperature black paint layer can be sprayed with the high-temperature crystal pearl paint layer after a flash-drying process of 10 to 20 minutes.

[0032] The particle size of the crystal pearl powder ranges from 10 μm to 50 μm. In this embodiment, the particle size of the crystal pearl powder can be any one of 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, 21um, 22um, 23um, 24um, 25um, 26um, 27um, 28um, 29um, 30um, 31um, 32um, 33um, 34um, 35um, 36um, 37um, 38um, 39um, 40um, 41um, 42um, 43um, 44um, 45um, 46um, 47um, 48um, 49um, and 50um.

[0033] In some embodiments, the components in the first colored paint layer 20 are calculated by mass percentage as follows: 40% to 60% acrylic resin, 10% to 20% polyester resin, 7% to 17% amino resin, 15% to 30% first colorant, and 5% to 15% first solvent.

[0034] In this embodiment, the content of acrylic resin can be specifically 45% to 55%, the content of polyester resin can be specifically 12% to 18%, the content of amino resin can be specifically 9% to 15%, the content of the first colorant can be specifically 19% to 25%, and the content of the first solvent can be specifically 7% to 12%.

[0035] In some embodiments, the thickness of the first colored paint layer 20 ranges from 10 μm to 20 μm. It can further range from 10 μm to 15 μm. In this embodiment, the thickness of the first colored paint layer 20 can also be any one of 10 um, 11 um, 12 um, 13 um, 14 um, 15 um, 16 um, 17 um, 18 um, 19 um, and 20 um. By controlling the thickness of the first colored paint layer 20, a relatively intact base color can be provided for the second colored paint layer 30, ensuring the color change of the second colored paint layer 30.

[0036] In some embodiments, the components in the second colored paint layer 30 are calculated by mass percentage as follows: 30% to 60% acrylic resin, 1% to 10% polyester resin, 10% to 30% amino resin, 6% to 12% second colorant, and 10% to 30% second solvent.

[0037] In this embodiment, the content of acrylic resin can be specifically 40% to 55%, the content of polyester resin can be specifically 3% to 7%, the content of amino resin can be specifically 15% to 25%, the content of the second colorant can be specifically 7% to 10%, and the content of the second solvent can be specifically 15% to 25%.

[0038] In some embodiments, the thickness of the second colored paint layer 30 ranges from 6 μm to 15 μm. It can further range from 8 μm to 12 μm. In this embodiment, the thickness of the second colored paint layer 30 can also be any one of 6 um, 7 um, 8 um, 9 um, 10 um, 11 um, 12 um, 13 um, 14 um, and 15 um. By controlling the thickness of the second colored paint layer 30, a better enamel gloss and a changing color effect can be exhibited.

[0039] In some embodiments, see Figure 2 The bottom layer 10 includes a primer coating 11, a putty layer 12 and a mid-coat coating 13. The primer coating 11 is disposed on the substrate 201. The putty layer 12 is disposed on the surface of the primer coating 11. The mid-coat coating 13 is disposed on the surface of the putty layer 12.

[0040] The primer coating 11 can be stably attached to the substrate 201, thereby improving the adhesion of the composite coating 100 to the substrate 201. The putty layer 12 can smooth the primer coating 11, cover the uneven defects existing on the primer coating 11, provide a flat surface for the coating of the intermediate coating 13, and improve the coating performance of the intermediate coating 13.

[0041] In some embodiments, the primer coating 11 is a high temperature epoxy primer coating. The high temperature epoxy primer coating includes a macromolecular epoxy resin, an anti-rust pigment, an amino resin, and a primer solvent. The macromolecular epoxy resin has good adhesion, can be stably coated on the surface of the substrate 201, and can provide reliable salt spray resistance and chemical resistance. In this way, the high temperature epoxy primer coating can improve the salt spray resistance and chemical resistance of the composite coating 100, improve the water resistance and anti-corrosion effect of the composite coating 100, and improve its adhesion on the substrate 201, thereby extending the service life of the composite coating 100. The anti-rust pigment can provide a base color, so that the second coloring paint layer 30 can show a better and richer color change effect, improve the decorativeness of the composite coating 100, and can also improve the anti-rust performance of the composite coating 100.

[0042] In some embodiments, the components in the high temperature epoxy primer coating are calculated by mass percentage as follows: 35% to 65% of macromolecular epoxy resin, 5% to 15% of anti-rust pigment, 10% to 30% of amino resin, and 10% to 30% of primer solvent.

[0043] In this embodiment, the content of the macromolecular epoxy resin can be specifically 40% to 60%, the content of the anti-rust pigment can be specifically 7% to 12%, the content of the amino resin can be specifically 15% to 25%, and the content of the primer solvent can be specifically 15% to 25%.

[0044] In some embodiments, the components of the anti-rust pigment may include aluminum tripolyphosphate, zinc phosphate, mica, and the like.

[0045] In some embodiments, the thickness of the primer coating 11 ranges from 30 μm to 50 μm. Further, it can be from 35 μm to 45 μm. In this embodiment, the thickness of the primer coating 11 can be any one of 30 um, 31 um, 32 um, 33 um, 34 um, 35 um, 36 um, 37 um, 38 um, 39 um, 40 um, 41 um, 42 um, 43 um, 44 um, 45 um, 46 um, 47 um, 48 um, 49 um, and 50 um.

[0046] In some embodiments, the thickness of the putty layer 12 ranges from 30 μm to 150 μm. Further, it can be 30 μm to 60 μm. In this embodiment, the thickness of the putty layer 12 can be any one of 30 um, 35 um, 40 um, 45 um, 50 um, 55 um, 60 um, 65 um, 70 um, 75 um, 80 um, 85 um, 90 um, 95 um, 100 um, 105 um, 110 um, 115 um, 120 um, 125 um, 130 um, 135 um, 140 um, 145 um, and 150 um.

[0047] In some embodiments, the mid-coat 13 is a high-temperature mid-coat. The high-temperature mid-coat includes hydroxy acrylic resin, polyester resin, amino resin, blocked isocyanate and mid-coat solvent. In this way, the high-temperature mid-coat 13 can improve the stone-impact resistance of the composite coating 100, thereby improving the scratch resistance of the composite coating 100.

[0048] In some embodiments, the components in the mid-coat layer 13 are calculated by mass percentage as follows: 30% to 50% hydroxy acrylic resin, 5% to 15% polyester resin, 8% to 18% amino resin, 4% to 10% blocked isocyanate, and 10% to 30% mid-coat solvent.

[0049] The hydroxy acrylic resin can improve the wear and scratch resistance of the mid-coat layer 13. The blocked isocyanate can improve the heat resistance, chemical corrosion resistance and wear resistance of the mid-coat layer 13. Thus, the stone chip resistance effect of the composite coating 100 can be improved by combining the hydroxy acrylic resin and the blocked isocyanate.

[0050] In this embodiment, the content of hydroxy acrylic resin can be specifically 35% to 45%, polyester resin 8% to 12%, amino resin 10% to 15%, blocked isocyanate 6% to 8%, and mid-coat solvent 15% to 25%.

[0051] In some embodiments, the thickness of the mid-coat layer 13 ranges from 35 μm to 45 μm. It can further range from 38 μm to 42 μm. In this embodiment, the thickness of the mid-coat layer 13 can be any one of 35 um, 36 um, 37 um, 38 um, 39 um, 40 um, 41 um, 42 um, 43 um, 44 um, and 45 um. By increasing the thickness of the mid-coat layer 13, the scratch resistance of the composite coating 100 can be further improved.

[0052] In some embodiments, see Figure 2 The bottom layer 10 further includes a phosphating layer 14 , which is disposed on the surface of the substrate 201 after being treated with a phosphating solution, and the primer coating 11 is disposed on the surface of the phosphating layer 14 .

[0053] The phosphating layer 14 can protect the substrate 201 to prevent the substrate 201 from being corroded, thereby improving the anti-corrosion ability of the composite coating 100, and improving the salt spray corrosion resistance of the primer coating 11, the mid-coat coating 13, the first coloring paint layer 20, the second coloring paint layer 30 and other coatings. At the same time, the phosphating layer 14 can also improve the adhesion of the primer coating 11 on the substrate 201 to reduce the possibility of the composite coating 100 falling off.

[0054] Specifically, the phosphating layer 14 is a phosphoric acid film formed on the surface of the substrate 201 through chemical and electrochemical reactions between the phosphating solution and the substrate 201 .

[0055] In some embodiments, the thickness of the phosphating layer 14 ranges from 5 μm to 15 μm. Further, it can be from 8 μm to 12 μm. In this embodiment, the thickness of the phosphating layer 14 can be any one of 5 um, 6 um, 7 um, 8 um, 9 um, 10 um, 11 um, 12 um, 13 um, 14 um, and 15 um.

[0056] In some embodiments, see Figure 2 The composite coating 100 further includes a surface layer 40, which is disposed on the surface of the second colored paint layer 30, and the surface layer 40 includes a fluorine-modified hydroxy acrylic resin, a polyester resin, an anti-sagging resin, a stain-resistant additive, an amino resin, and a solvent for the surface layer 40. The fluorine-modified hydroxy acrylic resin can improve the weather resistance and chemical resistance of the surface layer 40, and has excellent stain resistance and waterproof performance. The anti-sagging resin can improve the fluidity of the coating of the surface layer 40, reduce the occurrence of sagging, and improve the adhesion and coating stability of the surface layer 40 on the second colored paint layer 30, so that the thickness uniformity of the surface layer 40 is improved. In this way, the surface layer 40 can have good fullness, weather resistance, chemical resistance, and has the characteristics of anti-graffiti, stain resistance, easy cleaning, and anti-aging, thereby improving the service life of the composite coating 100. At the same time, the surface layer 40 has a high appearance flatness, good glossiness, and fullness, so as to further improve the color effect formed by the first colored paint layer 20 and the second colored paint layer 30, and improve the decorativeness of the composite coating 100.

[0057] In some embodiments, the components in the surface layer 40 are calculated by mass percentage as follows: 20% to 40% fluorine-modified hydroxy acrylic resin, 5% to 20% polyester resin, 15% to 40% anti-sagging resin, 1% to 8% stain-resistant additive, 15% to 40% amino resin, and 10% to 30% solvent for the surface layer 40.

[0058] In this embodiment, the content of fluorine-modified hydroxy acrylic resin can be specifically 25% to 35%, the content of polyester resin can be specifically 8% to 16%, the content of anti-sagging resin can be specifically 20% to 30%, the content of anti-fouling agent can be specifically 2% to 6%, the content of amino resin can be specifically 20% to 30%, and the content of surface layer 40 solvent can be specifically 15% to 25%.

[0059] In some embodiments, the thickness of the surface layer 40 ranges from 40 μm to 60 μm. Further, it can be from 45 μm to 55 μm. In this embodiment, the thickness of the surface layer 40 can be any one of 40um, 41um, 42um, 43um, 44um, 45um, 46um, 47um, 48um, 49um, 50um, 51um, 52um, 53um, 54um, 55um, 56um, 57um, 58um, 59um, and 60um.

[0060] Embodiment 1 The composite coating 100 includes a base layer 10, a first colored paint layer 20, a second colored paint layer 30 and a surface layer 40. The base layer 10 includes a phosphating layer 14, a primer coating 11, a putty layer 12 and a mid-coat coating 13.

[0061] The phosphating layer 14 is coated on the surface of the substrate 201 .

[0062] A primer coating 11 is prepared according to the mass fraction of 54% macromolecular epoxy resin, 5% anti-rust pigment, 11% amino resin and 30% primer solvent, and the primer coating 11 is applied on the surface of the phosphating layer 14. A putty layer 12 is applied on the surface of the primer coating 11.

[0063] A middle coating 13 is prepared according to the mass fractions of: 30% hydroxy acrylic resin, 5% polyester resin, 8% amino resin, 4% blocked isocyanate and 53% middle coating solvent, and the middle coating 13 is applied to the surface of the putty layer 12.

[0064] A first colored paint layer 20 is coated on the surface of the intermediate coating layer 13 , and a second colored paint layer 30 is coated on the surface of the first colored paint layer 20 .

[0065] The surface layer 40 is prepared according to the following mass fractions: 25% fluorine-modified hydroxy acrylic resin, 8% polyester resin, 18% anti-sagging resin, 2% stain-resistant additive, 22% amino resin, and 25% surface layer 40 solvent, and the surface layer 40 is coated on the surface of the second colored paint layer 30.

[0066] Embodiment 2 The composite coating 100 includes a base layer 10, a first colored paint layer 20, a second colored paint layer 30 and a surface layer 40. The base layer 10 includes a phosphating layer 14, a primer coating 11, a putty layer 12 and a mid-coat coating 13.

[0067] The phosphating layer 14 is coated on the surface of the substrate 201 .

[0068] A primer coating 11 is prepared according to the mass fraction of 50% macromolecular epoxy resin, 10% anti-rust pigment, 20% amino resin and 20% primer solvent, and the primer coating 11 is applied on the surface of the phosphating layer 14. A putty layer 12 is applied on the surface of the primer coating 11.

[0069] A middle coating 13 is prepared according to the mass fractions of: 40% hydroxy acrylic resin, 10% polyester resin, 18% amino resin, 7% blocked isocyanate and 25% middle coating solvent, and the middle coating 13 is applied to the surface of the putty layer 12.

[0070] A first colored paint layer 20 is coated on the surface of the intermediate coating layer 13 , and a second colored paint layer 30 is coated on the surface of the first colored paint layer 20 .

[0071] The surface layer 40 is prepared according to the following mass fractions: 35% fluorine-modified hydroxy acrylic resin, 10% polyester resin, 20% anti-sagging resin, 5% anti-fouling agent, 20% amino resin, and 10% surface layer 40 solvent, and the surface layer 40 is coated on the surface of the second colored paint layer 30.

[0072] Embodiment 3 The composite coating 100 includes a base layer 10, a first colored paint layer 20, a second colored paint layer 30 and a surface layer 40. The base layer 10 includes a phosphating layer 14, a primer coating 11, a putty layer 12 and a mid-coat coating 13.

[0073] The phosphating layer 14 is coated on the surface of the substrate 201 .

[0074] A primer coating 11 is prepared according to the mass fraction of 50% macromolecular epoxy resin, 15% anti-rust pigment, 20% amino resin and 15% primer solvent, and the primer coating 11 is applied on the surface of the phosphating layer 14. A putty layer 12 is applied on the surface of the primer coating 11.

[0075] A middle coating 13 is prepared according to the mass fractions of: 47% hydroxy acrylic resin, 15% polyester resin, 18% amino resin, 10% blocked isocyanate and 10% middle coating solvent, and the middle coating 13 is applied to the surface of the putty layer 12.

[0076] A first colored paint layer 20 is coated on the surface of the intermediate coating layer 13 , and a second colored paint layer 30 is coated on the surface of the first colored paint layer 20 .

[0077] The surface layer 40 is prepared according to the following mass fractions: 25% fluorine-modified hydroxy acrylic resin, 15% polyester resin, 24% anti-sagging resin, 1% anti-fouling agent, 20% amino resin, and 15% surface layer 40 solvent, and the surface layer 40 is coated on the surface of the second colored paint layer 30.

[0078] Embodiment 4 The composite coating 100 includes a base layer 10, a first colored paint layer 20, a second colored paint layer 30 and a surface layer 40. The base layer 10 includes a phosphating layer 14, a primer coating 11, a putty layer 12 and a mid-coat coating 13.

[0079] The phosphating layer 14 is coated on the surface of the substrate 201 .

[0080] A primer coating 11 is prepared according to the mass fraction of: 30% macromolecular epoxy resin, 3% anti-rust pigment, 8% amino resin, and 59% primer solvent, and the primer coating 11 is applied to the surface of the phosphating layer 14. A putty layer 12 is applied to the surface of the primer coating 11.

[0081] A middle coating 13 is prepared according to the mass fractions of: 60% hydroxy acrylic resin, 2% polyester resin, 25% amino resin, 2% blocked isocyanate and 11% middle coating solvent, and the middle coating 13 is applied to the surface of the putty layer 12.

[0082] A first colored paint layer 20 is coated on the surface of the intermediate coating layer 13 , and a second colored paint layer 30 is coated on the surface of the first colored paint layer 20 .

[0083] The surface layer 40 is prepared according to the following mass fractions: 18% fluorine-modified hydroxy acrylic resin, 20% polyester resin, 25% anti-sagging resin, 1% anti-fouling agent, 6% amino resin, and 30% surface layer 40 solvent, and the surface layer 40 is coated on the surface of the second colored paint layer 30.

[0084] After the preparation of each coating was completed, different properties of different coatings were tested. The test data of different embodiments are shown in Tables 1 to 3: Table 1 Table 2 Table 3 According to Tables 1 to 3 above, in Examples 1 to 3, the primer coating 11 exhibits good water resistance, salt spray resistance and chemical resistance, the mid-coat coating 13 exhibits good scratch resistance, and the surface layer 40 exhibits good gloss, weather resistance and stain resistance.

[0085] The above implementation modes are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A composite coating applied to a substrate of a vehicle, characterized in that: The composite coating comprises: A bottom layer, the bottom layer is used to be arranged on a substrate and combined with the substrate; A first colored paint layer, the first colored paint layer is disposed on the surface of the bottom layer, and the first colored paint layer comprises acrylic resin, polyester resin, amino resin, a first coloring material and a first solvent; A second colored paint layer, wherein the second colored paint layer is disposed on the surface of the first colored paint layer, and the second colored paint layer comprises acrylic resin, polyester resin, amino resin, a second colorant and a second solvent, and the second colorant is different from the first colorant.

2. The composite coating according to claim 1, characterized in that: The components in the first colored paint layer are calculated by mass percentage as follows: 40% to 60% acrylic resin, 10% to 20% polyester resin, 7% to 17% amino resin, 15% to 30% first colorant, and 5% to 15% first solvent.

3. The composite coating according to claim 1, characterized in that: The thickness of the first colored paint layer is in the range of 10 μm to 20 μm.

4. The composite coating according to claim 1, characterized in that: The components in the second colored paint layer are calculated by mass percentage as follows: 30% to 60% acrylic resin, 1% to 10% polyester resin, 10% to 30% amino resin, 6% to 12% second colorant, and 10% to 30% second solvent.

5. The composite coating according to claim 1, characterized in that: The thickness of the second colored paint layer is in the range of 6 μm to 15 μm.

6. The composite coating according to claim 1, characterized in that: The bottom layer includes: A primer coating, the primer coating being disposed on the substrate; A putty layer, the putty layer being disposed on the surface of the primer coating; A mid-coat layer is provided on the surface of the putty layer.

7. The composite coating according to claim 6, characterized in that: The bottom layer also includes a phosphating layer, which is disposed on the surface of the substrate after being treated with a phosphating solution, and the primer coating is disposed on the surface of the phosphating layer.

8. The composite coating according to claim 1, characterized in that: The composite coating also includes a surface layer, which is arranged on the surface of the second colored paint layer, and includes fluorine-modified hydroxy acrylic resin, polyester resin, anti-sagging resin, anti-fouling additive, amino resin and surface solvent.

9. The composite coating according to claim 8, characterized in that: The components in the surface layer are calculated by mass percentage as follows: 20% to 40% of fluorine-modified hydroxy acrylic resin, 5% to 20% of polyester resin, 15% to 40% of anti-sagging resin, 1% to 8% of stain-resistant additive, 15% to 40% of amino resin, and 10% to 30% of surface solvent.

10. A vehicle, characterized in that: The invention comprises a substrate and the composite coating according to any one of claims 1 to 9, wherein the composite coating is coated on the surface of the substrate.

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