CN108276900B - Coating system and metal piece product with ceramic-like effect - Google Patents
Coating system and metal piece product with ceramic-like effect Download PDFInfo
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- CN108276900B CN108276900B CN201810165736.2A CN201810165736A CN108276900B CN 108276900 B CN108276900 B CN 108276900B CN 201810165736 A CN201810165736 A CN 201810165736A CN 108276900 B CN108276900 B CN 108276900B
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a coating system and a metal piece product with a ceramic-like effect, wherein the coating system comprises a UV primer, a UV middle paint coated on a coating and a UV finish paint, and the UV primer comprises the following components in parts by mass: 10-20 parts by mass of difunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of hexafunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional acrylate monomer, 2-5 parts by mass of photoinitiator, 35-60 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent; the material of the coating is one or two of titanium and silicon. The metal piece product with the ceramic-like effect has the advantages of strong appearance texture effect, good adhesive force, boiling resistance and steel wool resistance.
Description
Technical Field
The invention relates to the field of coatings, in particular to a coating system. In addition, the invention also relates to a metal piece product with a ceramic simulating effect.
Background
At present, the 3C product adopts metal materials to become a mainstream trend, and meanwhile, the addition of fashion elements generates different visual effects and touch effects, so that people are greatly touted. Under the background, if the optical plating process is adopted on the surface of the metal shell, a more dazzling and beautiful coating effect can be achieved. Optical coating refers to a process of coating one (or more) layers of metal (or medium) films on the surface of an optical part. At present, a metal substrate adopts a coating process, generally indium, tin, aluminum, copper and other metals are coated, and the coating quality is improved by pre-coating a primer and then coating a paint on the coating. However, the existing UV coating generally has the problems of poor adhesion between a primer layer and a coating layer, and easy separation between the coating layer and a middle paint layer, and the like, and the product performance index of a finished product can not meet the requirements in the aspects of adhesion tests, boiling performance, wear resistance and other tests. Further, no development of a compatible coating has been known for plating titanium, silicon or an alloy thereof on the surface of a metal base material. Therefore, it is a problem to be solved urgently to produce metal piece products on metal materials, which have texture and can reach the performance indexes of 3C products.
Disclosure of Invention
The invention provides a coating paint system and a metal piece product with a ceramic-like effect, and aims to solve the technical problems that when a coating is formed on the surface of a metal substrate by adopting optical coating, the adhesion force between coatings is poor, and the binding force with the coating cannot meet the requirement.
One aspect of the invention provides a coating system, which comprises a UV primer, a UV intermediate coat coated on a coating and a UV finish coat; the UV primer comprises the following components in parts by mass: 10-20 parts by mass of difunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of hexafunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional acrylate monomer, 2-5 parts by mass of photoinitiator, 35-60 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent; the material of the coating is one or two of titanium and silicon.
Further, the UV medium paint comprises the following components in parts by mass: 15-30 parts by mass of difunctional aliphatic polyurethane acrylic resin, 15-30 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 1-3 parts by mass of adhesion promoting resin, 1-3 parts by mass of photoinitiator, 35-65 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent.
Further, the adhesion promoting resin is a trifunctional phosphate ester modified acrylic resin.
Further, the UV finishing paint comprises the following components in parts by mass: 15-20 parts by mass of high-functional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 15-20 parts by mass of organic silicon hybrid resin, 5-10 parts by mass of hexafunctional acrylate monomer, 1-5 parts by mass of photoinitiator, 30-60 parts by mass of diluent and 0.2-2 parts by mass of auxiliary agent.
Further, among the high-functional aliphatic urethane acrylic resins, the high-functional is one of urethane acrylic resins having functionalities of 6, 9, 12, and 15.
Further, the primer coated on the surface of the substrate and the color paint coated on the primer are also included, and the UV primer is coated on the color paint.
Further, the primer comprises the following components in parts by mass: 30-40 parts by mass of polyester resin, 10-20 parts by mass of toner, 40-50 parts by mass of diluent and 0.2-1 part by mass of auxiliary agent.
Further, the colored paint comprises the following components in parts by mass: 30-40 parts by mass of hydroxyl acrylic resin, 20-30 parts by mass of toner, 30-40 parts by mass of diluent and 1-5 parts by mass of auxiliary agent.
Further, the diluent is one or more of ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, ethylene glycol butyl ether and butanone.
Further, the photoinitiator is 1-hydroxy-cyclohexylbenzophenone and/or 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide.
According to another aspect of the invention, the metal part product with the ceramic simulating effect is further provided, the metal part product is formed by sequentially coating the coating system on a metal substrate, and the coating is positioned between the UV primer layer and the UV intermediate paint layer.
Furthermore, the thickness of the UV primer layer is 20-25 μm, the thickness of the coating layer is 100-200 nm, and the thickness of the UV intermediate paint layer is 3-6 μm.
Furthermore, the thickness of the UV finish paint layer is 20-25 μm.
The invention has the following beneficial effects:
according to the film coating paint system provided by the invention, the UV primer in the paint system comprises difunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin and hexafunctional aliphatic polyurethane acrylic resin which are used as main components of a film forming substance. Since the plating layer is made of titanium, silicon, or an alloy thereof, the hardness of the plating layer is higher than that of general indium plating, and the UV primer is also difficult to adhere to the plating layer. The difunctional aliphatic polyurethane acrylic resin has the characteristics of good flexibility, strong adhesive force and the like, and can improve the adhesion between the coating and a coating layer; but the photocuring speed is slow, so that the ultraviolet curing primer can not be used alone in photocuring products, the primer is easy to be cured incompletely, and the cracking phenomenon can be generated after film coating. Therefore, the addition of the hexafunctional aliphatic urethane acrylic resin increases the curing speed and the crosslinking density of the primer, so that the UV primer is cured completely, but the resin shrinks greatly and the adhesion between the primer and the coating is easily affected, so that the selection of an appropriate addition amount is required. In addition, the trifunctional aliphatic polyurethane acrylic resin has high curing speed, is not too brittle and has moderate hardness, and is added into the UV primer to improve the boiling resistance of the primer. The obtained coating system has the advantages of high hardness, good adhesive force and the like, and is widely applied to 3C products.
The metal piece product with the ceramic-like effect is formed by coating the coating paint system on a metal material, and the coating sequence is as follows: UV priming paint, coating film, UV intermediate paint and UV finishing paint. The difunctional aliphatic polyurethane acrylic resin, the trifunctional aliphatic polyurethane acrylic resin and the hexafunctional aliphatic polyurethane acrylic resin added into the UV primer can improve the adhesive force between the UV primer and a metal material and between the UV primer and a coating, and the obtained metal piece product with a ceramic-like effect is strong in appearance texture effect, good in adhesive force, and resistant to boiling and steel wool.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The invention provides a coating system, which comprises a UV primer, a UV intermediate coat coated on a coating and a UV finish coat; the UV primer comprises the following components in parts by mass: 10-20 parts by mass of difunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of hexafunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional acrylate monomer, 2-5 parts by mass of photoinitiator, 35-60 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent; the material of the coating is one or two of titanium and silicon. Preferably, the trifunctional acrylate monomer is trimethylolpropane triacrylate.
The coating system is mainly suitable for the condition that the material of the coating is titanium, silicon or alloy thereof, such as a titanium layer, a silicon layer or a Ti-Si-Ti layer. The target materials of the plating layer are respectively selected from titanium pentoxide and silicon dioxide. To realize the anti-reflection and brightness enhancement effects, three metal layers are generally plated, namely, the plating layer is a Ti-Si-Ti layer, and the total film thickness is below 100 nm.
In the coating system, the UV primer in the coating system comprises difunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin and hexafunctional aliphatic polyurethane acrylic resin which are used as main components of a film forming substance. Since the plating layer is made of titanium, silicon or an alloy thereof, for example, a titanium layer, a silicon layer or a Ti-Si-Ti layer, the hardness of the plating layer is higher than that of general indium plating, and the UV primer is also difficult to adhere to the plating layer. The difunctional aliphatic polyurethane acrylic resin has the characteristics of good flexibility, strong adhesive force and the like, and can improve the adhesion between the coating and a coating layer; but the photocuring speed is slow, so that the ultraviolet curing primer can not be used alone in photocuring products, the primer is easy to be cured incompletely, and the cracking phenomenon can be generated after film coating. Therefore, the addition of the hexafunctional aliphatic urethane acrylic resin increases the curing speed and the crosslinking density of the primer, so that the UV primer is cured completely, but the resin shrinks greatly and the adhesion between the primer and the coating is easily affected, so that the selection of an appropriate addition amount is required. In addition, the trifunctional aliphatic polyurethane acrylic resin has high curing speed, is not too brittle and has moderate hardness, and is added into the UV primer to improve the boiling resistance of the primer. The obtained coating system has the advantages of high hardness, good adhesive force and the like, and is widely applied to 3C products.
Preferably, the UV medium paint comprises the following components in parts by mass: 15-30 parts by mass of difunctional aliphatic polyurethane acrylic resin, 15-30 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 1-3 parts by mass of adhesion promoting resin, 1-3 parts by mass of photoinitiator, 35-65 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent. The UV intermediate paint comprises difunctional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin and adhesion promoting resin which are used as main components of a film forming substance. The coating layer is made of titanium, silicon or alloy thereof, and the hardness of the coating layer is higher than that of common indium plating, so that the paint is difficult to adhere to the coating layer. The difunctional aliphatic polyurethane acrylic resin has the characteristics of good flexibility, strong adhesive force and the like. The trifunctional aliphatic polyurethane acrylic resin has high curing speed and good boiling resistance. The two functional aliphatic polyurethane acrylic resins are matched with each other, so that the adhesive force strength is improved, the adhesive force promoting resin can also promote the adhesive force of the Chinese lacquer and the coating, meanwhile, the added auxiliary agent further increases the adhesion of the Chinese lacquer to a coating, and the obtained coating system with the ceramic simulating effect is high in hardness and good in adhesive force. Still preferably, the auxiliary is mainly a silane coupling agent.
Preferably, the adhesion promoting resin is a trifunctional phosphate ester-modified acrylic resin. The coating layer is made of titanium, silicon or alloy thereof, the hardness of the coating layer is higher than that of a common indium-plated coating layer, so that the coating layer is difficult to adhere, the adhesion promoting resin is more stable to the adhesion of inorganic materials such as titanium and silicon, and the adhesion after boiling is excellent. The adhesion promoting resin can also respectively promote the adhesion between the UV primer and the UV intermediate coat and the coating.
Preferably, the UV finishing paint comprises the following components in parts by mass: 15-20 parts by mass of high-functional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 15-20 parts by mass of organic silicon hybrid resin, 5-10 parts by mass of hexafunctional acrylate monomer, 1-5 parts by mass of photoinitiator, 30-60 parts by mass of diluent and 0.2-2 parts by mass of auxiliary agent. Preferably, the hexafunctional acrylate monomer is dipentaerythritol hexaacrylate.
The UV finishing paint comprises high-functional aliphatic polyurethane acrylic resin, trifunctional aliphatic polyurethane acrylic resin and organic silicon hybrid resin which are used as film forming substances. The UV finishing paint is added with high-content high-functional aliphatic polyurethane acrylic resin, and the resin contains six or more than six active groups which can participate in photocuring reaction, so that the UV finishing paint has the characteristics of high photocuring rate, high crosslinking density, high hardness of a corresponding cured film, excellent wear resistance and the like, but the UV finishing paint is too brittle, so that the problems of product cracking or unqualified hundred-lattice test and the like are caused. The trifunctional aliphatic polyurethane acrylic resin can reduce the shrinkage of the coating and improve the problems of hundred lattices and cracking of the finish in the subsequent links. The organic silicon hybrid resin is adopted, so that a paint film contains silicon, the surface tension is increased, and the paint has good anti-fouling and scratch-resistant performances and excellent steel wool resistance performance test. The three film-forming substances supplement each other to improve the adhesion performance of the UV finish.
Preferably, in the high-functional aliphatic polyurethane acrylic resin, the high-functionality is one of polyurethane prepolymers having functionalities of 6, 9, 12 and 15. The high functionality in the high-functional aliphatic polyurethane acrylic resin is one of polyurethane prepolymers having functionalities of 6, 9, 12, and 15. The proportion of the UV finishing paint contains high-functional group aliphatic polyurethane acrylic resin with a relatively high proportion, and the UV finishing paint contains six or more than six active groups which can participate in photocuring reaction, so that the UV finishing paint has the advantages of high photocuring speed, high crosslinking density, high hardness of a cured film and excellent wear resistance.
Preferably, the paint also comprises a primer coated on the surface of the substrate and a color paint coated on the primer, wherein the UV primer is coated on the color paint. The primer and the colored paint are added into the coating system, and the coating system is coated on a metal substrate, so that the ceramic imitation effect of the coating can be further enhanced while the binding force between the coating system and the material can be ensured.
Preferably, the primer comprises the following components in parts by mass: 30-40 parts by mass of polyester resin, 10-20 parts by mass of toner, 40-50 parts by mass of diluent and 0.2-1 part by mass of auxiliary agent. The primer provides adhesion with a metal material and a colored paint layer, so that a coating on the metal material cannot be easily peeled off, and meanwhile, a coating system can be better used on the metal material, and a paint film is fully and uniformly adhered to the surface of an object to be coated.
Preferably, the colored paint comprises the following components in parts by mass: 30-40 parts by mass of hydroxyl acrylic resin, 20-30 parts by mass of toner, 30-40 parts by mass of diluent and 1-5 parts by mass of auxiliary agent. When the colored paint is sprayed on the primer, the polyester resin in the primer permeates into the light surface of the colored paint coating, and under the irradiation and heating action of an infrared lamp, the polyester resin in the primer can perform an addition reaction with hydroxyl in the hydroxyl acrylic resin of the colored paint, so that the adhesion stability of the colored paint and the primer is improved through chemical bonds. Moreover, the colored paint has good wettability to the pigment, improves leveling property of a paint film, and can increase interlayer adhesion.
Preferably, the diluent is one or more of ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, ethylene glycol butyl ether and butanone. The diluent can reduce the viscosity of the paint, improve the convenience, increase the leveling property of each coating, and control the drying time, so that the paint film is fully and uniformly attached to the surface of the coated object.
Preferably, the photoinitiator is 1-hydroxy-cyclohexylbenzophenone and/or 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide. The photoinitiator is decomposed into radicals or ions after absorbing light energy, and causes a polymerization reaction. The photoinitiator needs to be added in a proper amount, the dosage of the initiator is too small, the curing speed is slow, the curing is insufficient, the dosage of the initiator is large, the paint film is discolored, cracked or wrinkled, and the like, and the mass part of the photoinitiator is controlled to be 1-5.
Preferably, in the auxiliary agent, the leveling agent is polyether modified dimethyl polysiloxane copolymer and/or acrylic polyester modified polysiloxane.
The coating method of the coating system on the metal substrate comprises the following steps: (1) preparing a UV primer layer on the surface of the metal substrate; (2) forming a coating of titanium, silicon or an alloy thereof on the UV primer layer obtained in the step (1) through an optical coating; (3) and (3) sequentially preparing a UV middle paint layer and a UV top paint layer on the plating layer obtained in the step (2) to obtain the metal piece product with the ceramic simulating effect. The surface of a metal material is plated with titanium, silicon or alloy thereof by adopting an optical plating process and an optical coating machine in a vacuum environment, so that the whole metal piece product has a very strong and bright texture effect, and the preparation process is simple, easy to operate and suitable for large-scale production.
The equipment adopted for preparing the coating in the coating system is a high-speed impeller stirrer which has a simple structure and is a high-speed rotating shaft capable of ascending and descending through a hydraulic device, and the lower end of the shaft is provided with a disc-shaped impeller which is horizontally arranged and rotates along with the shaft. When the high-speed impeller stirrer runs, the dispersion materials (including resin, a diluent, an auxiliary agent, pigment and filler) violently advance along the centrifugal direction of the impeller, impact the barrel wall, flow back to the middle part of the impeller up and down to form vortex, and generate impact force and shearing force, so that the aims of wetting and dispersing the coating and the pigment are fulfilled.
In the coating method, the coating film thickness of the UV primer layer is 20-25 mu m, the coating film is leveled for 5-8 min at 50-60 ℃, and the thickness is 700-1000 mJ/cm2Curing at an energy of (1). And then, plating inorganic materials such as titanium, silicon or alloy thereof on the product coated with the UV primer in a vacuum environment by an optical coating machine, so that the whole product has a very strong and bright texture effect. Then spraying UV middle paint on the coating, wherein the coating film is 3-6 μm thick, leveled for 5-8 min at 60-70 ℃, and sprayed at 300-600J/cm2Curing under the energy of (3) to form a UV intermediate paint layer. Spraying the UV finish paint on the UV intermediate paint layer, wherein the coating film is 20-25 μm thick, flatly flows for 5-8 min at the temperature of 60-70 ℃, and is 900-1300J/cm2Curing under the energy of (3) to form a UV finish paint layer.
Preferably, in the above coating method, the primer and the color paint are first coated on the surface of the metal substrate, and then the UV primer is coated on the color paint. Wherein the primer coating film thickness is 6-8 μm, and leveling is performed at 70-80 ℃ for 30min to form a primer coating; then coating a colored paint with the film thickness of 8-12 mu m on the primer coating, and flatting for 15min at 70-80 ℃ to form the colored paint layer.
The invention also provides a metal piece product with a ceramic-like effect, which is formed by sequentially coating the coating system on a metal substrate, wherein the coating is positioned between the UV primer layer and the UV intermediate paint layer.
The metal piece product with the ceramic simulating effect is formed by coating a coating system on a metal material, and the coating sequence is as follows in sequence: UV priming paint, coating film, UV intermediate paint and UV finishing paint. The difunctional aliphatic polyurethane acrylic resin, the trifunctional aliphatic polyurethane acrylic resin and the hexafunctional aliphatic polyurethane acrylic resin added into the UV primer can improve the adhesive force between the UV primer and a metal material and between the UV primer and a coating, and the obtained metal piece product with a ceramic-like effect is strong in appearance texture effect, good in adhesive force, and resistant to boiling and steel wool.
Preferably, the thickness of the UV primer layer is 20-25 μm, the thickness of the coating layer is 100-200 nm, and the thickness of the UV intermediate paint layer is 3-6 μm. The coating thickness of the UV primer layer is 20-25 μm, the coating is leveled for 5-8 min at 50-60 ℃, and the coating thickness is 700-1000 mJ/cm2Curing at an energy of (1). The product is coated with inorganic materials of titanium, silicon or alloy thereof by an optical coating machine in a vacuum environment, so that the whole product has a very strong and bright texture effect. Spraying UV middle paint on the coating layer, wherein the coating film is 3-6 μm thick, flatly flows at 60-70 ℃ for 5-8 min, and is 300-600J/cm2Curing under the energy of (3) to form a UV intermediate paint layer.
Preferably, the thickness of the UV top coat layer is 20-25 μm. Spraying the UV finish paint on the UV intermediate paint layer, wherein the coating film is 20-25 μm thick, flatly flows for 5-8 min at the temperature of 60-70 ℃, and is 900-1300J/cm2Curing under the energy of (3) to form a UV finish paint layer. The selection of the parameters of the UV topcoat provides more effective protection of the basecoat layer and provides excellent abrasion, scratch and chemical resistance.
And spraying a primer layer and a colored paint layer before spraying the UV primer layer. Spraying primer on the surface of the material, coating the film with thickness of 6-8 μm, and leveling for 30min at 70-80 ℃ to form a primer layer. The proper film forming conditions are selected, so that the leveling of the primer is facilitated, and the primer is cured under the irradiation of an ultraviolet lamp, so that the primer is better attached to the surface of a metal material. Spraying the color paint on the primer layer, wherein the coating film is 8-12 mu m thick, and flatting for 15min at 70-80 ℃ to form the color paint layer. The color paint is sprayed on the primer layer, leveled and cured, and achieves good adhesion with the primer layer.
Examples
In the following examples:
the hydroxyl acrylic resin is purchased from eastern Japan, or from Taiwan high-point chemical industry.
Difunctional aliphatic polyurethane acrylic resins are available from sartomer, usa or from cyante, usa or from taiwan changxing chemical.
Trifunctional aliphatic polyurethane acrylic resins are available from sartomer, usa or cyanote, usa or taiwan chang chem, china.
The high functional aliphatic polyurethane acrylic is available from sartomer, usa or cyanote, usa or taiwan changxing chemical.
The silicone hybrid resin was purchased from sandomad, usa, or from cyante, usa, or from zhongshan jie dada.
The trifunctional acrylate monomer was purchased from EM232 of changxing chemistry, taiwan, china.
Hexafunctional acrylate monomers were purchased from EM266 of changxing chemistry, taiwan.
The photoinitiator was alpha-hydroxycyclohexyl benzophenone available as Irgacure 184 from Ciba, switzerland.
The photoinitiator was 2,4, 6-trimethylbenzoyldiphenylphosphine oxide from DarocurTPO, Ciba, Switzerland.
The adhesion promoting resin was a phosphoric acid modified trifunctional acid ester available from CD9051 of sartomer, usa.
In the auxiliary agent, the leveling agent is polyether modified dimethyl polysiloxane copolymer and acrylic polyester modified polysiloxane which are all purchased from Germany BYK company.
The diluents ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, ethylene glycol butyl ether, and methyl ethyl ketone are commercially available.
The remaining chemicals were commercially available in the following examples.
The compositions of the coating systems of examples 1-7 are shown in tables 1-7, respectively.
TABLE 1 parts by weight of the ingredients in example 1
Table 2 parts by weight of the ingredients in example 2
Table 3 parts by weight of the ingredients in example 3
Table 4 parts by weight of the ingredients in example 4
TABLE 5 parts by weight of the ingredients in example 5
TABLE 6 parts by weight of the ingredients in example 6
TABLE 7 parts by weight of the ingredients in example 7
The coating method of the coating system on the metal substrate comprises the following steps:
(1) spraying primer on the surface of a metal material, wherein the coating film is 6 microns thick, and leveling for 30min under the irradiation of an ultraviolet lamp at 70 ℃ to form a primer layer;
(2) spraying the color paint on the primer layer, wherein the coating film is 10 mu m thick, and leveling for 15min under the irradiation of an ultraviolet lamp at 70 ℃ to form a color paint layer;
(3) spraying UV primer on the color paint layer, coating with a thickness of 20 μm, leveling at 50 deg.C under irradiation of ultraviolet lamp for 5min at 800mJ/cm2Is cured to form a UV primer layer.
(4) And (3) plating an inorganic material Ti-Si-Ti on the UV primer layer by adopting an optical film plating machine to form a plating layer, wherein the thickness of the plating layer is 100 nm.
(5) Spraying UV intermediate coat on the coating layer, coating with a thickness of 3 μm, leveling at 60 deg.C under irradiation of ultraviolet lamp for 5min at 500J/cm2Curing under the energy of (1) to form a UV intermediate paint layer;
(6) spraying UV finish paint on the UV intermediate paint layer, coating the UV intermediate paint layer with the thickness of 20 μm, leveling for 5min under the irradiation of an ultraviolet lamp at 60 ℃, and leveling at 1000J/cm2Curing under the energy of (3) to form a UV finish paint layer.
The paint for preparing the coatings adopts a high-speed impeller stirrer.
By the coating method, the coatings in the coating systems of the embodiments 1 to 7 are coated on the metal substrate to obtain the metal part product with the ceramic-like effect.
The metal piece products with the ceramic-like effect of examples 1 to 7 were subjected to performance tests, and the test results are listed in table 8.
The adhesion test is carried out according to the GB 9286-1998 standard. The paint surface boiling test is carried out under the condition of soaking in boiling water at 100 ℃ for 1h, and the product adhesion is evaluated. The steel wool testing method comprises the following steps: 0000# steel wool, 25 times/min, 1000g force/10 times. Steel wool friction standard: 1, no abrasion exists; 2, the scratches which can be seen under a magnifying lens of 5 times but can not be seen naked; 3, the naked eye has visible rare scratches; 4, etc. have a lot of scratches under naked vision but do not cause blurring; 5, etc., are completely blurred due to the large number of scratches.
TABLE 8 results of product performance test on metal parts with ceramic-like effect obtained in examples 1 to 7
From the test results in table 8, it can be seen that the surface of the metal product coated by the coating system of example 7 has the best performance.
Example 2 is that reducing the toner content on the basis of example 1 solves the problem of the primer being tested by the hundred lattice.
Example 3 is the content of the toner added in the colored paint on the basis of example 2, and the test result is as follows: the UV primer layer was tested off in hundreds of cells.
Example 4 is based on example 2, the content of the hexafunctional aliphatic polyurethane acrylic resin is increased in the primer, and the content of the trifunctional aliphatic polyurethane acrylic resin is reduced, and the test result is that: the coating is boiled off with water.
Example 5 was based on example 2 with the adhesion promoting resin removed from the interior of the paint formulation and the test results: the UV intermediate coat layer was boiled off with water.
Example 6 is based on example 2, the proportion of the high-functional aliphatic polyurethane acrylic resin is increased and the proportion of the trifunctional aliphatic polyurethane acrylic resin is decreased in the formula of the UV finishing paint, and the test results are as follows: the UV finish paint layer is boiled off by water.
Example 7 is to increase the content of the silicone hybrid resin on the basis of example 2, and the test results are as follows: the steel wool resistance of the coating product with the ceramic-like effect is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A film coating paint system is characterized in that,
the coating comprises a UV primer, a UV intermediate coat coated on a coating and a UV finish coat; the UV primer comprises the following components in parts by mass:
10-20 parts by mass of difunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of hexafunctional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional acrylate monomer, 2-5 parts by mass of photoinitiator, 35-60 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent;
the material of the coating is one or two of titanium and silicon, and the target material of the coating is selected from trititanium pentoxide and/or silicon dioxide;
the UV medium paint comprises the following components in parts by mass:
15-30 parts by mass of difunctional aliphatic polyurethane acrylic resin, 15-30 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 1-3 parts by mass of adhesion promoting resin, 1-3 parts by mass of photoinitiator, 35-65 parts by mass of diluent and 0.01-0.5 part by mass of auxiliary agent;
the adhesion promoting resin is trifunctional phosphate ester modified acrylic resin.
2. The coating system of claim 1,
the UV finishing paint comprises the following components in parts by mass:
15-20 parts by mass of high-functional aliphatic polyurethane acrylic resin, 10-15 parts by mass of trifunctional aliphatic polyurethane acrylic resin, 15-20 parts by mass of organic silicon hybrid resin, 5-10 parts by mass of hexafunctional acrylate monomer, 1-5 parts by mass of photoinitiator, 30-60 parts by mass of diluent and 0.2-2 parts by mass of auxiliary agent.
3. The plating coating system of claim 2,
in the high-functional aliphatic polyurethane acrylic resin, the high-functional group is one of polyurethane acrylic resins with 6, 9, 12 and 15 functionalities.
4. The coating system of claim 1,
the UV primer is coated on the color paint.
5. The coating system of claim 4,
the primer comprises the following components in parts by mass: 30-40 parts by mass of polyester resin, 10-20 parts by mass of toner, 40-50 parts by mass of diluent and 0.2-1 part by mass of auxiliary agent; and/or
The colored paint comprises the following components in parts by mass: 30-40 parts by mass of hydroxyl acrylic resin, 20-30 parts by mass of toner, 30-40 parts by mass of diluent and 1-5 parts by mass of auxiliary agent.
6. The coating system according to any one of claims 1 to 5,
the diluent is one or more of ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, ethylene glycol butyl ether and butanone; and/or
The photoinitiator is 1-hydroxy-cyclohexyl benzophenone and/or 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide.
7. A metal piece product with ceramic-like effect is characterized in that,
the metal piece product is formed by coating the metal substrate with the coating system of any one of claims 1 to 6 in sequence, wherein the coating layer is positioned between the UV primer layer and the UV intermediate paint layer.
8. Metal piece product with a ceramic-like effect according to claim 7,
the film thickness of the UV primer layer is 20-25 mu m, the thickness of the coating is 100-200 nm, and the film thickness of the UV intermediate paint layer is 3-6 mu m; and/or
The film thickness of the UV finish paint layer is 20-25 mu m.
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| CN109251646A (en) * | 2018-07-25 | 2019-01-22 | 上海嘉斓岱克塑胶科技有限公司 | A kind of plating leopard line coating and its spraying method |
| CN109266205A (en) * | 2018-08-29 | 2019-01-25 | 上海嘉斓岱克塑胶科技有限公司 | A kind of aurora overflow color electroplating coating and its spraying method |
| CN109722160B (en) * | 2018-12-19 | 2020-12-29 | 上海乘鹰新材料有限公司 | High-wear-resistance UV (ultraviolet) photocuring release layer applied to gold stamping material and preparation thereof |
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| CN111901996B (en) * | 2020-08-05 | 2021-09-03 | Oppo广东移动通信有限公司 | Shell assembly, preparation method thereof and electronic equipment |
| CN113337201A (en) * | 2021-06-30 | 2021-09-03 | 湖南松井新材料股份有限公司 | Primer and preparation method and application thereof |
| CN113337202A (en) * | 2021-06-30 | 2021-09-03 | 湖南松井新材料股份有限公司 | UV (ultraviolet) finish paint as well as preparation method and application thereof |
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| CN116656216A (en) * | 2023-03-31 | 2023-08-29 | 肇庆市哈力化工有限公司 | High-temperature-resistant glass electroplating UV primer and preparation method thereof |
| CN116731603A (en) * | 2023-05-12 | 2023-09-12 | 湖南松井新材料股份有限公司 | Vacuum plating laser engraving protective paint and preparation method and application thereof |
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