Optical coating transfer coating and preparation method and application thereof

Abstract

The application discloses a kind of optical coating transfer coating and its preparation method and application, belong to coating technical field.The coating of the application includes treating agent 1 layer, color paint layer, UV primer layer, optical coating layer, treating agent 2 layer, PU intermediate coating layer, gold stamping layer, treating agent 3 layer, UV topcoat layer;The structure of the optical coating layer is five layers, and the material of the optical coating layer includes the coating layer of metal superposition of silicon dioxide, lithium dioxide, silicon dioxide, lithium dioxide, silicon dioxide, which is coated on UV primer layer in sequence.The preparation method of coating includes: on the surface of substrate, treating agent 1 layer, color paint layer, UV primer layer are sprayed in sequence, optical coating is carried out, treating agent 2 layer, PU intermediate coating layer are continuously sprayed, gold stamping treatment is carried out, treating agent 3 layer, UV topcoat layer are continuously sprayed.The application improves the adhesion of coating by the synergistic effect between different components, while having good metal texture and high-quality visual effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coatings, in particular to an optical plating transfer printing coating, a preparation method and application thereof. BACKGROUND

[0002] Currently, the mobile phone battery cover on the market adopts a PC plastic shell spraying process, but the metal texture of the product is not strong enough, and the appearance effect cannot reach the high texture and brightening effect of optical plating transfer printing. Epoxy glass fiber is an important fiber reinforced plastic material, which has the characteristics of light weight, high strength, strong corrosion resistance, etc. compared with PC plastic, but because the epoxy glass fiber material has a cloth pattern, compared with PC material, the coating needs to have good hiding power to cover the cloth pattern.

[0003] The optical plating transfer printing coating can be applied to all brands of mobile phone battery cover materials that require optical plating transfer printing process, and the superposition of double transfer printing process and optical plating, the appearance effect is rich. The existing optical plating process has certain technical bottlenecks in multi-layer superposition and different texture transfer printing, such as insufficient adhesion between coatings, uneven plating layer, unstable appearance effect, etc. In addition, when the optical plating is carried out after the substrate surface is sprayed with a treating agent, it is often difficult to simultaneously ensure the adhesion, transparency and durability of the plating film.

[0004] Therefore, it is of great significance to provide an optical plating transfer printing coating to solve the problem of insufficient adhesion of the coating, improve the stability of the optical plating film, and at the same time have good metal texture and high-quality visual effect. SUMMARY

[0005] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides an optical plating transfer printing coating applied to an epoxy glass fiber plate, which has good coating adhesion and metal texture.

[0006] The present application also provides a preparation method of the optical plating transfer printing coating.

[0007] The present application also provides an application of the optical plating transfer printing coating.

[0008] The first aspect of the present application provides an optical plating transfer printing coating, which comprises a treating agent 1 layer, a color paint coating layer, a UV primer layer, an optical plating layer, a treating agent 2 layer, a PU intermediate coating layer, a gold stamping layer, a treating agent 3 layer, and a UV topcoat layer.

[0009] The optical plating layer has a five-layer structure, and the five-layer structure is formed by alternately coating silica, lithium sesquioxide, silica, lithium sesquioxide, and silica metal on the UV primer layer.

[0010] The optical coating transfer paint according to the first aspect of the present application has at least the following beneficial effects:

[0011] The present application enhances the bonding force between the coating layers by the cooperation of various treating agents, especially the bonding effect of treating agent 1 and the epoxy glass plate is remarkable, treating agent 2 and treating agent 3 further enhance the adhesion of the coating layer and the outer coating, ensuring the stability and durability of the coating layer. The main function of spraying color paint is to adjust the color effect of the product and provide coverage for the grain print; spraying optical UV primer coating and making bottom texture transfer printing improves the flatness of the bottom layer, and different texture effects need to be transferred on the UV primer; spraying treating agent 2 coating on the optical coating provides the bonding force between the coating and the silicon dioxide metal layer; spraying PU intermediate coating provides a buffer for the shrinkage of the topcoat on the treating agent 2, thereby ensuring the bonding force between the treating agent 2 and the metal layer; spraying treating agent 3 coating provides the adhesion between the topcoat and the gold stamping; spraying optical UV topcoat coating and making outer texture transfer printing provides protection for other coating layers, and different sanding effects need to be transferred on the UV topcoat.

[0012] The present application adopts the metal coating structure of alternating and superimposed silicon dioxide and lithium trioxide, has good metal texture, not only gives the coating layer uniform high reflectivity and transparency, but also makes the coating layer have good durability and aesthetics, avoids the problem of uneven or layered coating in the existing process.

[0013] The present application solves the problem of insufficient adhesion of the coating layer by the synergistic use of treating agent 1, color paint, UV primer, optical coating material, treating agent 2, PU intermediate coating, treating agent 3, and UV topcoat, improves the stability of the optical coating layer, and at the same time has good metal texture and high-quality visual effect.

[0014] Silicon dioxide and lithium trioxide have stable chemical properties and will not react with most acids and bases. At the same time, both are non-conductor materials with very low electrical conductivity, which does not affect the transmission of mobile phone signals. The refractive index of silicon dioxide is about 1.46, and the light transmittance on the optical coating is high enough.

[0015] According to some embodiments of the present application, the raw materials of the treating agent 1 include, in mass percentage: hydroxy acrylic resin (DIC1063) 20%-30%, thermoplastic acrylic resin (Mitsubishi Chemical 7615) 20%-30%, cellulose resin (CAB381-0.5) 5%-10%, color paste (self-milling) 20%-30%, adhesion promoter (LTW) 2%-3%, and solvent butyl acetate 20%-30%.

[0016] According to some embodiments of the present application, the raw materials for preparing the treating agent 1 layer further include a curing agent and a diluent.

[0017] According to some embodiments of the present application, the volume ratio of the processing agent 1, the curing agent, and the diluent is 100:10:150-200.

[0018] According to some embodiments of the present application, the raw materials for preparing the color paint layer include, in percentage by mass, 30-40% of a hydroxyl acrylic resin (DIC 1063), 5-10% of a modified hydroxyl acrylic polymer (Xiyou Chemical HD-2588A), 20-30% of a color paste, 2-3% of an adhesion promoter, 20-30% of a solvent butyl acetate.

[0019] According to some embodiments of the present application, the raw materials for preparing the color paint layer further include a curing agent and a diluent.

[0020] According to some embodiments of the present application, the volume ratio of the color paint, the curing agent, and the diluent is 100:5:120-150.

[0021] According to some embodiments of the present application, the raw materials of the processing agent 2 include, in percentage by mass, 20-30% of a modified hydroxyl acrylic polymer (Mitsui Chemical XP11B), 2-3% of a thermoplastic acrylic resin (Jiadiao Chemical AP425), 0.1-0.2% of a leveling agent (BYK 358N), 0.5-1% of a silane coupling agent (Dow Corning 6040), 30-40% of a solvent butyl acetate, and 30-40% of a solvent ethyl acetate.

[0022] The optical plating contact coating is supplemented with a silane coupling agent to enhance the bite of the coating and the plating layer. The principle of the adhesion of the silane coupling agent is that the silane migrates to the interface between the coating and the plating layer, reacts with moisture on the inorganic surface, hydrolyzes to generate a silanol group, and then forms a hydrogen bond with the surface hydroxyl group of the plating layer. During the heating and curing process, a dehydration reaction occurs to form a covalent bond with the plating layer.

[0023] According to some embodiments of the present application, the raw materials for preparing the processing agent 2 layer further include a curing agent.

[0024] According to some embodiments of the present application, the volume ratio of the processing agent 2 and the curing agent is 100:0.5.

[0025] According to some embodiments of the present application, the raw materials of the processing agent 3 include, in percentage by mass, 20-30% of a hydroxyl acrylic polymer (Mitsui Chemical Q857), 0.1-0.2% of a leveling agent (BYK 358N), 30-40% of a solvent butyl acetate, and 30-40% of a solvent ethyl acetate.

[0026] According to some embodiments of the present application, the raw materials for preparing the processing agent 3 layer further include a curing agent.

[0027] According to some embodiments of the present application, the volume ratio of the treating agent 3, the curing agent is 100:2.

[0028] According to some embodiments of the present application, the components of the PU mid-coat, in mass percentage, include modified hydroxyl acrylic polymer (Xiyou Chemical HD-2960) 20-30%, macromolecular weight acrylate (Mitsubishi Chemical N-6803) 5-10%, leveling agent (BYK 358N) 0.1-0.2%, silane coupling agent (Dow Corning 6040) 0.5-1%, solvent butyl acetate 30-40%, solvent ethyl acetate 30-40%.

[0029] According to some embodiments of the present application, the raw materials for preparing the PU mid-coat layer further include a curing agent and a diluent.

[0030] According to some embodiments of the present application, the volume ratio of the PU mid-coat, the curing agent, the diluent is 100:5:100-150.

[0031] According to some embodiments of the present application, the raw materials of the UV primer, in mass percentage, include initiator 2-3%, solvent type polyurethane resin (Changxing 6071) 15-20%, six-functional polyurethane resin (Changxing 6145-100) 5-10%, two-functional polycarbonate resin (Sartomer 9001) 10-15%, three-functional monomer TMPTA 5-10%, solvent ethyl acetate 20-30%, solvent butyl acetate 10-20%, solvent n-butyl alcohol 10-20%, solvent acetone 10-20%, leveling agent 0.1-0.3%.

[0032] According to some embodiments of the present application, the raw materials of the UV topcoat, in mass percentage, include initiator 3-4%, solvent type polyurethane resin (Changxing 6071) 15-20%, nine-functional polyurethane resin (Boxing B-919) 15-20%, three-functional polyurethane resin (Cognis 6008) 10-15%, six-functional monomer DPHA 5-10%, solvent ethyl acetate 20-30%, solvent butyl acetate 10-20%, solvent methyl isobutyl ketone 10-20%, solvent ethylene glycol butyl ether 10-20%, leveling agent 0.1-0.3%, ultraviolet absorber 1-2%.

[0033] The second aspect of the present application provides a preparation method of the optical coating transfer coating layer, characterized in that, the method includes optical coating and transfer processes, and the steps include:

[0034] The treating agent 1 layer, the color paint layer, and the UV primer layer are sprayed on the surface of the substrate in sequence, optical coating is performed, the treating agent 2 layer and the PU mid-coat layer are continuously sprayed, gold stamping is performed, the treating agent 3 layer and the UV topcoat layer are continuously sprayed to obtain the optical coating transfer coating layer.

[0035] According to some embodiments of the present application, the coating thickness of the treatment agent 1 coating is 6-10 μm.

[0036] According to some embodiments of the present application, the coating thickness of the color paint coating is 15-25 μm.

[0037] According to some embodiments of the present application, the coating thickness of the UV primer coating is 15-25 μm.

[0038] According to some embodiments of the present application, the coating film thickness of the optical plating is 200-400 nm.

[0039] According to some embodiments of the present application, the coating thickness of the treatment agent 2 coating is 2-5 μm.

[0040] According to some embodiments of the present application, the coating thickness of the PU intermediate paint coating is 5-10 μm.

[0041] According to some embodiments of the present application, the coating thickness of the treatment agent 3 coating is 2-4 μm.

[0042] According to some embodiments of the present application, the coating thickness of the UV topcoat coating is 15-25 μm.

[0043] According to some embodiments of the present application, the specific steps of the preparation method include:

[0044] D1. Spraying treatment agent 1 on the surface of the substrate, and obtaining a treatment agent 1 coating after baking and curing;

[0045] D2. Spraying color paint on the surface of the treatment agent 1 coating, and obtaining a color paint coating after baking and curing;

[0046] D3. Spraying UV primer on the surface of the color paint, and obtaining a UV primer coating after baking, LED lamp curing and overprinting, and mercury lamp curing;

[0047] D4. Carrying out optical plating on the primer, and obtaining an optical plating layer;

[0048] D5. Spraying treatment agent 2 on the optical plating layer, and obtaining a treatment agent 2 coating after baking and curing;

[0049] D6. Spraying PU intermediate paint on the treatment agent 2, and obtaining a PU intermediate paint coating after baking and curing;

[0050] D7. Gold stamping on the PU intermediate paint coating, and obtaining a gold-stamped LOGO layer;

[0051] D8. Spraying treatment agent 3 on the product after gold stamping, and obtaining a treatment agent 3 coating after baking and curing;

[0052] D9. Spraying UV topcoat on the surface of the processing agent 3, baking, LED lamp curing and pad printing, and then mercury lamp curing to obtain a UV topcoat layer.

[0053] According to some embodiments of the present application, in step D1, the processing agent 1: curing agent: diluent = 100: 10: 150-200 are stirred uniformly and sprayed on the product, the temperature of the leveling is 70-80℃, and the time of the leveling is 10-15 min.

[0054] According to some embodiments of the present application, in step D2, the color paint: curing agent: diluent = 100: 5: 120-150 are stirred uniformly and sprayed on the product, the temperature of the leveling is 70-80℃, and the time of the leveling is 10-15 min.

[0055] According to some embodiments of the present application, in step D3, the temperature of the leveling is 55-60℃, the time of the leveling is 5-8 min, the energy of the LED lamp is 300-500 mJ / cm 2 , and the energy of the mercury lamp is 720-880 mJ / cm2.

[0056] According to some embodiments of the present application, in step D5, the processing agent 2: curing agent = 100: 0.5 are stirred uniformly and sprayed on the product, the temperature is 70-80℃, the time of the leveling is 10-15 min, and the film thickness is 2-5 μm.

[0057] According to some embodiments of the present application, in step D6, the PU middle paint: curing agent: diluent = 100: 5: 100-150 are stirred uniformly and sprayed on the product, the temperature of the leveling is 55-60℃, and the time of the leveling is 5-8 min.

[0058] According to some embodiments of the present application, in step D7, the gold stamping layer is composed of an adhesive layer + an aluminum layer + a coloring layer + a stripping layer + a PET film.

[0059] According to some embodiments of the present application, in step D8, the processing agent 3: curing agent = 100: 2 are stirred uniformly and sprayed on the product, the temperature of the leveling is 55-60℃, and the time of the leveling is 5-8 min.

[0060] According to some embodiments of the present application, in step D9, the temperature of the leveling is 55-60℃, the time of the leveling is 5-8 min, the film thickness is 15-25 μm, the energy of the LED lamp is 200-400 mJ / cm 2 , and the energy of the mercury lamp is 900-1100 mJ / cm2.

[0061] According to some embodiments of the present application, the substrate is an epoxy fiberglass board.

[0062] Unless otherwise defined, "about" as used herein is intended to provide an allowance, for example, ± 2%, of the value for which it is used. For example, about 100 is 100 ± 2% x 100.

[0063] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the present application. DETAILED DESCRIPTION

[0064] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters in different figures denote the same or like components. The embodiments described below are presented by way of example to explain the present application, and are not intended to limit the present application.

[0065] In the description of the present application, if there is description to first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated or the sequence of technical features indicated.

[0066] The words "preferably," "more preferably," and the like serve only to clarify and are not to be construed as limiting the claimed present application to excluded embodiments. Additionally, the use of these words is not intended to limit the scope of the claimed present application to only those embodiments which are described in the specification.

[0067] When a numerical range is disclosed herein, the range is continuous, and includes the minimum and maximum values of the range, as well as each integer within the range. Further, when a range is disclosed, the range includes any and all sub-ranges posited within the range. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood as encompassing any and all sub-ranges subsumed therein. It is also to be understood that all references to ranges of variables are to be interpreted as written description of every single value indicated by the range. For example, every value and sub-range within the above-disclosed ranges are meant to be specifically delineated and intended to be encompassed by the present application.

[0068] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0069] The reagents, methods and apparatus employed in the present application are those conventional in the art, unless otherwise specified.

[0070] Example 1

[0071] The optical coating transfer paint according to the present application comprises the following components in percentage by mass:

[0072] Treatment agent 1 (comprising hydroxyl acrylic resin 20%, thermoplastic acrylic resin 30%, cellulose resin 5%, color paste 20%, adhesion promoter 2%, solvent butyl acetate 23%) with a coating thickness of 6-10 μm;

[0073] Color paint (comprising hydroxyl acrylic resin 30%, modified hydroxyl acrylic polymer 10%, color paste 27%, adhesion promoter 3%, solvent butyl acetate 30%) with a coating thickness of 15-25 μm;

[0074] UV primer (comprising initiator 3%, solvent type polyurethane resin 20%, hexaurethane resin 5%, diurethane resin 12%, triurethane monomer 5%, solvent ethyl acetate 20, solvent butyl acetate 10%, solvent n-butanol 10%, solvent acetone 14.7%, leveling agent 0.3%) with a coating thickness of 15-25 μm;

[0075] The optical coating structure is five layers of silica, lithium trioxide, silica, lithium trioxide, silica metal coating layers.

[0076] Treatment agent 2 (comprising modified hydroxyl acrylic polymer 20%, thermoplastic acrylic resin 2%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 40%, solvent ethyl acetate 37%) with a coating thickness of 2-5 μm;

[0077] PU intermediate paint (comprising modified hydroxyl acrylic polymer 20%, macromolecular acrylic ester 10%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 30%, solvent ethyl acetate 39%) with a coating thickness of 5-10 μm;

[0078] Treatment agent 3 (comprising hydroxyl acrylic polymer 20%, leveling agent 0.1%, solvent butyl acetate 40%, solvent ethyl acetate 39.9%) with a coating thickness of 2-4 μm;

[0079] UV topcoat (its composition is initiator 3%, solvent type polyurethane resin 15%, nonaurethane resin 15.9%, triurethane resin 10%, hexaurethane monomer 5%, solvent ethyl ester 20%, solvent butyl ester 10%, solvent methyl isobutyl ketone 10%, solvent ethylene glycol butyl ether 10%, leveling agent 0.1%, ultraviolet absorber 1%), coating thickness is 15-25 μm.

[0080] The embodiment also provides the application of the optical coating transfer printing coating described above, and the application process specifically includes:

[0081] S100, the product of the processing agent 1: curing agent:diluent = 100:10:200 is stirred uniformly, and is sprayed on the epoxy glass material, the coating film thickness is 6-10 μm, and leveling is carried out at 80°C for 15 minutes;

[0082] S200, the product of the color paint: curing agent:diluent = 100:5:150 is stirred uniformly, and is sprayed on the product, the coating film thickness is 15-25 μm, and leveling is carried out at 80°C for 15 minutes;

[0083] S300, UV primer is sprayed, the coating film thickness is 15-25 μm, leveling is carried out at 60°C for 5 minutes, and then curing is carried out under the energy of 300-500 mj / cm 2 of LED, finally, mercury lamp curing is carried out under the energy of 720-880 mJ / cm2.

[0084] S400, optical coating: the coating layer of metal stacking of silicon dioxide+ lithium trioxide+ silicon dioxide+ lithium trioxide+ silicon dioxide is adopted.

[0085] S500, the product of the processing agent 2: curing agent = 100:0.5 is stirred uniformly, and is sprayed on the product, the coating film thickness is 2-5 μm, and leveling is carried out at 80°C for 15 minutes;

[0086] S600, the product of the PU intermediate paint: curing agent:diluent = 100:5:100-150 is stirred uniformly, and is sprayed on the product, the coating film thickness is 5-10 μm, and leveling is carried out at 60°C for 5 minutes;

[0087] S700, gilding process;

[0088] S800, the product of the processing agent 3: curing agent = 100:2 is stirred uniformly, and is sprayed on the product, the coating film thickness is 2-4 μm, and leveling is carried out at 60°C for 5 minutes;

[0089] S900, UV topcoat is sprayed, the coating film thickness is 15-25 μm, leveling is carried out at 60°C for 5 minutes, and then curing is carried out under the energy of 200-400 mj / cm 2The optical coating is cured under LED energy for 30-60 seconds, then under mercury lamp energy for 900-1100 mJ / cm2.

[0090] Example 2

[0091] The optical coating is cured under LED energy for 30-60 seconds, then under mercury lamp energy for 900-1100 mJ / cm2.

[0092] Treatment agent 1 (comprising hydroxyl acrylic resin 30%, thermoplastic acrylic resin 20%, cellulose resin 5%, color paste 20%, adhesion promoter 2%, solvent butyl acetate 23%) with a coating thickness of 6-10 μm;

[0093] Color paint (comprising hydroxyl acrylic resin 30%, modified hydroxyl acrylic polymer 10%, color paste 27%, adhesion promoter 3%, solvent butyl acetate 30%) with a coating thickness of 15-25 μm;

[0094] UV primer (comprising initiator 3%, solvent type polyurethane resin 20%, hexaurethane resin 5%, diurethane resin 12%, triurethane monomer 5%, solvent ethyl acetate 20, solvent butyl acetate 10%, solvent n-butanol 10%, solvent acetone 14.7%, leveling agent 0.3%) with a coating thickness of 15-25 μm;

[0095] The optical coating has a structure of five layers, i.e. silica, lithium trioxide, silica, lithium trioxide, silica, and metal.

[0096] Treatment agent 2 (comprising modified hydroxyl acrylic polymer 20%, thermoplastic acrylic resin 2%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 40%, solvent ethyl acetate 37%) with a coating thickness of 2-5 μm;

[0097] PU intermediate paint (comprising modified hydroxyl acrylic polymer 20%, macromolecular acrylic ester 10%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 30%, solvent ethyl acetate 39%) with a coating thickness of 5-10 μm;

[0098] Treatment agent 3 (comprising hydroxyl acrylic polymer 20%, leveling agent 0.1%, solvent butyl acetate 40%, solvent ethyl acetate 39.9%) with a coating thickness of 2-4 μm;

[0099] UV top coat (composition: initiator 3%, solvent type polyurethane resin 15%, nonafunctional polyurethane resin 15.9%, triafunctional polyurethane resin 10%, hexafunctional monomer 5%, solvent ethyl acetate 20%, solvent butyl acetate 10%, solvent methyl isobutyl ketone 10%, solvent ethylene glycol butyl ether 10%, leveling agent 0.1%, ultraviolet absorber 1%), coating thickness 15-25 μm.

[0100] Example 3

[0101] The present example provides an optical coating transfer coating material, which differs from the example in that the components of the coating material include, in mass percentage:

[0102] Treatment agent 1 (composition: hydroxyl acrylic resin 20%, thermoplastic acrylic resin 30%, cellulose resin 5%, color paste 20%, adhesion promoter 2%, solvent butyl acetate 23%), coating thickness 6-10 μm;

[0103] Color paint coating (composition: hydroxyl acrylic resin 30%, modified hydroxyl acrylic polymer 10%, color paste 27%, adhesion promoter 3%, solvent butyl acetate 30%), coating thickness 15-25 μm;

[0104] UV primer (composition: initiator 3%, solvent type polyurethane resin 17%, hexafunctional polyurethane resin 5%, difunctional polycarbonate resin 15%, triafunctional monomer 5%, solvent ethyl acetate 20, solvent butyl acetate 10%, solvent n-butanol 10%, solvent acetone 14.7%, leveling agent 0.3%), coating thickness 15-25 μm;

[0105] The structure of the optical coating is five layers of silica, lithium trioxide, silica, lithium trioxide, silica metal superimposed coating layers.

[0106] Treatment agent 2 (composition: modified hydroxyl acrylic polymer 20%, thermoplastic acrylic resin 2%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 40%, solvent ethyl acetate 37%), coating thickness 2-5 μm;

[0107] PU intermediate coating (composition: modified hydroxyl acrylic polymer 20%, macromolecular weight acrylic ester 10%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 30%, solvent ethyl acetate 39%), coating thickness 5-10 μm;

[0108] Treatment agent 3 (composition: hydroxyl acrylic polymer 20%, leveling agent 0.1%, solvent butyl acetate 40%, solvent ethyl acetate 39.9%), coating thickness 2-4 μm;

[0109] UV top coat (composition: initiator 3%, solvent type polyurethane resin 15%, nonafunctional polyurethane resin 15.9%, triafunctional polyurethane resin 10%, hexafunctional monomer 5%, solvent ethyl acetate 20%, solvent butyl acetate 10%, solvent methyl isobutyl ketone 10%, solvent ethylene glycol butyl ether 10%, leveling agent 0.1%, ultraviolet absorber 1%), coating thickness 15-25 μm.

[0110] Example 4

[0111] The present example provides an optical coating transfer coating material, which differs from the example in that the components of the coating material include, in mass percentage:

[0112] Treatment agent 1 (composition: hydroxyl acrylic resin 20%, thermoplastic acrylic resin 30%, cellulose resin 5%, color paste 20%, adhesion promoter 2%, solvent butyl acetate 23%), coating thickness 6-10 μm;

[0113] Color paint coating (composition: hydroxyl acrylic resin 30%, modified hydroxyl acrylic polymer 10%, color paste 27%, adhesion promoter 3%, solvent butyl acetate 30%), coating thickness 15-25 μm;

[0114] UV primer (composition: initiator 3%, solvent type polyurethane resin 20%, hexafunctional polyurethane resin 5%, difunctional polycarbonate resin 12%, triafunctional monomer 5%, solvent ethyl acetate 20, solvent butyl acetate 10%, solvent n-butanol 10%, solvent acetone 14.7%, leveling agent 0.3%), coating thickness 15-25 μm;

[0115] The structure of the optical coating is five layers of silica, lithium trioxide, silica, lithium trioxide, silica metal superimposed coating layers.

[0116] Treatment agent 2 (composition: modified hydroxyl acrylic polymer 20%, thermoplastic acrylic resin 2%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 40%, solvent ethyl acetate 37%), coating thickness 2-5 μm;

[0117] PU intermediate coating (composition: modified hydroxyl acrylic polymer 25%, macromolecular weight acrylic ester 5%, leveling agent 0.2%, silane coupling agent 0.8%, solvent butyl acetate 30%, solvent ethyl acetate 39%), coating thickness 5-10 μm;

[0118] Treatment agent 3 (composition: hydroxyl acrylic polymer 20%, leveling agent 0.1%, solvent butyl acetate 40%, solvent ethyl acetate 39.9%), coating thickness 2-4 μm;

[0119] UV topcoat (composition: initiator 3%, solvent type polyurethane resin 15%, nonafunctional polyurethane resin 15.9%, triafunctional polyurethane resin 10%, hexafunctional monomer 5%, solvent ethyl acetate 20%, solvent butyl acetate 10%, solvent methyl isobutyl ketone 10%, solvent ethylene glycol butyl ether 10%, leveling agent 0.1%, ultraviolet light absorber 1%), coating thickness 15-25 μm.

[0120] The optical plating transfer coating scheme of the coatings of Examples 1-4 and Comparative Examples 1-4 is shown in Table 1. The coatings used in Comparative Examples 1-4 are the same as in Example 1.

[0121] Table 1 Optical plating transfer coating scheme of the coatings of Examples 1-4 and Comparative Examples 1-4

[0122] Comparative Example 1 Color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint Comparative Example 2 Treatment Agent 1 + color paint + UV base paint + optical plating + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint Comparative Example 3 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + gold stamping + Treatment Agent 3 + UV top paint Comparative Example 4 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + UV top paint Example 1 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint Example 2 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint Example 3 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint Example 4 Treatment Agent 1 + color paint + UV base paint + optical plating + Treatment Agent 2 + PU intermediate paint + gold stamping + Treatment Agent 3 + UV top paint

[0123] Test Example

[0124] Examples 1-4 and Comparative Examples 1-4 were subjected to a 100 degree water boiling test, and the test method was as follows:

[0125] 1) Before testing, the appearance of the product was checked for discoloration, bubbles, cracks, peeling, and other defects, and the surface of the sample was wiped clean with a lint-free cloth;

[0126] 2) Pure water was heated to a temperature of 100°C, and the product was placed in a water bath, ensuring that the product did not overlap, collide, or directly contact the heating rod;

[0127] 3) The water bath time was 6 hours, and after the test was completed, the sample was naturally cooled to room temperature under room temperature conditions.

[0128] Detection criteria: 1) After the water boiling was completed, the sample was checked after standing at room temperature for 120 min, and no recoverable appearance change was allowed, which was judged as OK, otherwise as NG. At the same time, it should be ensured that the paint coating was not allowed to wrinkle or peel off under any circumstances during the water boiling process and after the water boiling was completed; 2) After standing at room temperature for 120 min, the adhesion test was performed, and the product adhesion was required to reach 3B or above; 3) After testing, new bubble points were added, and their maximum diameters were used as the judgment basis. When the point diameter was less than D < 0.1 (S < 0.008), it was ignored, but when there were a large number of local points, it was not acceptable. Bubble point diameter 0.5 ≥ D ≥ 0.1, more than 2, not acceptable; bubble point diameter D > 0.5, not acceptable;

[0129] The test results of Examples 1-4 and Comparative Examples 1-4 are shown in Table 2.

[0130] Table 2 Test results of Examples 1-4 and Comparative Examples 1-4

[0131]

[0132]

[0133] Therefore, the application solves the problem of insufficient adhesion of coating by using the synergistic use of treating agent 1, color paint, UV primer, optical plating material, treating agent 2, PU intermediate paint, treating agent 3 and UV topcoat.

[0134] The above has described the embodiments of the application in detail, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the application. In addition, the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

Claims

1. An optical coating overprint coating, characterized in that, The coating comprises a treatment agent layer 1, a colored paint layer, a UV primer layer, an optical coating layer, a treatment agent layer 2, a PU intermediate paint layer, a hot stamping layer, a treatment agent layer 3, and a UV topcoat layer. The optical coating layer has a five-layer structure, including a coating layer consisting of silicon dioxide, lithium trioxide, silicon dioxide, lithium trioxide, and silicon dioxide metal superposition layers coated sequentially on a UV primer layer. The raw materials for preparing the treatment agent layer 1, by mass percentage, include: 20%-30% hydroxyl acrylic resin, 20%-30% thermoplastic acrylic resin, 5%-10% cellulose resin, 20%-30% color paste, and 2%-3% adhesion promoter; The raw materials for preparing the second layer of the treatment agent, by mass percentage, include: 20%-30% modified hydroxyl acrylic polymer, 2%-3% thermoplastic acrylic resin, 0.1%-0.2% leveling agent, and 0.5%-1% silane coupling agent; The raw materials for preparing the three-layer treatment agent, by mass percentage, include: 20%-30% hydroxyacrylic polymer and 0.1%-0.2% leveling agent.

2. The optical lacquer lift coating of claim 1, wherein, The raw materials for preparing the first layer of the treatment agent also include a curing agent and a diluent.

3. The optical lacquer lift coating of claim 1, wherein, The raw materials for preparing the second layer of the treatment agent also include a curing agent.

4. The optical coating imprinting coating according to claim 1, characterized in that, The raw materials for preparing the three layers of the treatment agent also include curing agent and diluent.

5. The optical coating imprinting coating according to claim 1, characterized in that, By mass percentage, the raw materials for preparing the paint layer in the PU include 20%-30% modified hydroxyl acrylic polymer, 5%-10% high molecular weight acrylate, 0.1%-0.2% leveling agent, and 0.5%-1% silane coupling agent.

6. The optical coating imprinting coating according to claim 1, characterized in that, The raw materials for preparing the paint layer in the PU also include curing agents and diluents.

7. A method for preparing an optical coating imprinting layer as described in any one of claims 1 to 6, characterized in that, Including optical coating and imprinting processes, the steps include: The substrate surface is sequentially sprayed with a treatment agent layer 1, a color paint layer, and a UV primer layer for optical coating. Then, a treatment agent layer 2 and a PU intermediate paint layer are sprayed on for hot stamping. Finally, a treatment agent layer 3 and a UV topcoat layer are sprayed on to obtain the optical coating imprint coating.

8. The preparation method according to claim 7, characterized in that, The thickness of the treatment agent layer 1 is 6-10 μm.

9. The preparation method according to claim 7, characterized in that, The coating thickness of the paint layer is 15-25 μm.

10. The preparation method according to claim 7, characterized in that, The coating thickness of the UV primer layer is 15-25 μm.

11. The preparation method according to claim 7, characterized in that, The thickness of the optical coating layer is 200-400 nm.

12. The preparation method according to claim 7, characterized in that, The coating thickness of the second layer of the treatment agent is 2-5 μm.

13. The preparation method according to claim 7, characterized in that, The coating thickness of the paint layer in the PU is 5-10 μm.

14. The preparation method according to claim 7, characterized in that, The coating thickness of the three layers of the treatment agent is 2-4 μm.

15. The preparation method according to claim 7, characterized in that, The coating thickness of the UV topcoat layer is 15-25 μm.

16. The preparation method according to any one of claims 8 to 15, characterized in that, The substrate is an epoxy fiberglass board.

17. The preparation method according to any one of claims 8 to 15, characterized in that, The hot stamping layer includes an adhesive layer, an aluminum layer, a coloring layer, a release layer, and a PET film.

18. A mobile phone battery cover made of epoxy fiberglass sheet material, characterized in that, Includes epoxy fiberglass sheets and the optical coating imprinting coating as described in any one of claims 1 to 6.

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