CN114561134A - Special UV (ultraviolet) photocuring finish paint and wear-resistant coating for vibration wear resistance, preparation method and spraying process thereof - Google Patents
Special UV (ultraviolet) photocuring finish paint and wear-resistant coating for vibration wear resistance, preparation method and spraying process thereof Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
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- 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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
This application is divisional under application No. 2020113991493. The wear-resistant coating comprises 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of adhesion promoter, 2-4 parts of auxiliary agent, 15-25 parts of pigment and filler and 20-30 parts of mixed solvent.
Description
The invention relates to a vibration wear-resistant coating, a preparation method and a spraying process thereof, which are divided applications, wherein the application number of the original application is 2020113991493, and the application date is 12, month and 4 days in 2020.
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a special UV (ultraviolet) photocuring finish coat for vibration wear resistance, a wear-resistant coating, a preparation method thereof and a spraying process thereof.
Background
Due to the diversity of the colors of the primers of 3C electronic products, such as mobile phone electronic products, the primers have the disadvantages that the paint film surface is not wear-resistant and the chemical resistance is not good. Therefore, a layer of UV finish is usually sprayed on the primer to meet the requirements of wear resistance, chemical resistance and the like, and the used common UV coating can cause the defects of paint film falling, large gloss change, insufficient vibration wear resistance and the like after a period of time. Significant quality issues are presented to the appearance, durability, and durability of the product.
With the arrival of the 5G era, the shielding phenomenon of metal to signals is obvious, and the demetallization is already in a trend. The plasticity of the plastic is strong, and the processing difficulty and the cost are relatively low; meanwhile, the spectrum of the wave band used by the 5G signal can not be shielded, so that the mobile phone terminal can be made into the most main material on the back cover (or the back cover and the plastic middle frame) of the mobile phone terminal.
Therefore, a set of paint products which can be applied to the mobile phone (plastic material) frame or the mobile phone side key matching is urgently needed to be developed, the phenomena of poor wear resistance of paint film vibration, unstable performances of paint film falling after long service time and the like are solved, and the spraying requirement of the paint market on the PC substrate is met.
Disclosure of Invention
The invention provides a special UV photocuring finish paint for vibration wear resistance, aiming at solving the technical problems that when the existing paint is sprayed on a mobile phone (plastic material) frame or a mobile phone side key, the paint film is poor in vibration wear resistance, and the paint film falls off after a long service time and has unstable performances.
It is another object of the present invention to provide a vibration abrasion resistant coating.
The third purpose of the invention is to provide a preparation method of the vibration wear-resistant coating.
The fourth purpose of the invention is to provide a spraying process of the vibration wear-resistant coating.
The UV photocuring finish paint special for vibration wear resistance comprises the following components in parts by mass: 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of dispersing agent, 0.5-1 part of flatting agent, 0-10 parts of matting powder, 0-25 parts of wax slurry, 0-10 parts of photoinitiator and 20-30 parts of mixed solvent.
Preferably, the mixed solvent is one or a combination of more of ethyl acetate, butyl acetate, isopropanol, ethylene glycol butyl ether, isopropyl acetate, propylene glycol methyl ether acetate and diacetone alcohol.
Preferably, the high-functionality urethane acrylate is an aliphatic urethane acrylate with a functionality of 9 or an aliphatic urethane acrylate with a functionality of 10; can provide adhesion, flexibility, and abrasion resistance.
The hexafunctionality polyurethane acrylate is aliphatic polyurethane acrylate with the functionality of 6; providing adhesion and stiffness.
The tetrafunctional polyurethane acrylate is solvent-type aliphatic polyurethane acrylate with the functionality of 4; providing adhesion and leveling.
The difunctional urethane acrylate is an aliphatic urethane acrylate having a functionality of 2. Providing flexibility.
Preferably, the dispersing agent is AFCONA4010 and AFCONA4053, is a product of Effolman company, and improves the storage property and the appearance fineness of the product.
The leveling agent BYK333 and/or TEGO 410; the appearance leveling property and the fullness of the product are improved.
The extinction powder is east tank E-1011 and/or Grace C-803; the gloss of the product is adjusted to meet different requirements of customers.
The wax slurry is a polyhexene wax slurry and/or a polycarbonate wax slurry; the smoothness and the transparency of the product are improved.
The photoinitiator is 1-hydroxycyclohexyl phenyl ketone and/or diphenyl phosphine oxide.
The vibration wear-resistant coating comprises a PU (polyurethane) primer and a UV (ultraviolet) photocureable finish, wherein the PU primer comprises the following components in parts by mass: 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of adhesion promoter, 2-4 parts of assistant, 15-25 parts of pigment and filler and 20-30 parts of mixed solvent;
the UV photocuring finish paint comprises the following components in parts by mass: 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of dispersing agent, 0.5-1 part of flatting agent, 0-10 parts of matting powder, 0-25 parts of wax slurry, 0-10 parts of photoinitiator and 20-30 parts of mixed solvent.
The application provides a vibration wear-resistant coating, which comprises a PU (polyurethane) primer and a UV (ultraviolet) photocureable finish, wherein the PU primer comprises 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of an adhesion promoter, 2-4 parts of an auxiliary agent, 15-25 parts of pigment and filler and 20-30 parts of a mixed solvent, the thermoplastic acrylic resin can improve the adhesion to a PC (polycarbonate) substrate, the hydroxyl acrylic resin is used for improving the water resistance and interlayer adhesion of a coating, the cellulose acetate butyrate improves the arrangement and metal texture of pearlescent silver light, the adhesion promoter improves the interlayer adhesion between the PC substrate and the UV, the auxiliary agent prevents the pearlescent silver powder from generating hard agglomeration in storage, and the pigment, the filler and the mixed solvent are combined, so that the prepared PU primer has the advantages of long operation time, good recoatability, water boiling resistance and the like after being sprayed, The UV photocuring finish paint has the characteristic of good color development, the UV photocuring finish paint comprises 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of six-functionality polyurethane acrylate, 15-28 parts of four-functionality polyurethane acrylate, 4-10 parts of two-functionality polyurethane acrylate, 0.5-1 part of dispersant, 0.5-1 part of flatting agent, 0-10 parts of matting powder, 0-25 parts of wax slurry, 0-10 parts of photoinitiator and 20-30 parts of mixed solvent, the high-functionality polyurethane acrylate is selected to provide adhesion, flexibility and wear resistance, the six-functionality polyurethane acrylate provides adhesion and hardness, the four-functionality polyurethane acrylate provides adhesion and leveling property, the two-functionality polyurethane acrylate provides flexibility, the dispersant improves the storage property and appearance fineness of the product, the dispersant improves the appearance leveling property and fullness of the product, the matting powder is used for adjusting the product gloss to meet different requirements of customers, the slip degree and transparency of the product are improved by wax slurry, and then the photoinitiator and the mixed solvent are combined, so that the UV photocuring finish paint has good transparency and high fullness, after the vibration abrasion-resistant coating is sprayed on a plastic PC substrate, the vibration abrasion-resistant coating is subjected to vibration abrasion-resistant test for more than 2 hours, the edges/top corners have no point abrasion or discontinuous linear abrasion (no more than 1mm and 1mm), the abrasion edges have no obvious continuous saw teeth, and the rest parts have no abrasion.
Preferably, the thermoplastic acrylic resin is one or more of resins with the glass transition temperature of 50 ℃, 60 ℃ or 70 ℃. The thermoplastic acrylic resin with the glass transition temperature Tg of 50 ℃, 60 ℃ or 70 ℃ is preferably used in the application, the Tg value is higher than the highest temperature outside summer, the coating can be prevented from being sticky back, the coating can be prevented from being polluted by sand dust, the adhesion to PC materials is improved, the coating is too hard when the Tg value is higher than 70 ℃, the problem that the coating is brittle and easy to crack exists, the Tg value is lower than 50 ℃, the scratch resistance is poor, the coating is poor in dryness after paint preparation, and the coating is easy to soften and sticky back when the temperature is too high in summer.
Preferably, the hydroxyl acrylic resin is one or more of resins with the glass transition temperature of 50 ℃, 60 ℃ or 70 ℃, and the hydroxyl value of the hydroxyl acrylic resin is 10, 15 or 20. The application preferably uses the hydroxyl acrylic resin with the glass transition temperature Tg of 50 ℃, 60 ℃ or 70 ℃, the hydroxyl value of the hydroxyl acrylic resin is 10, 15 or 20, the adhesion of the hydroxyl acrylic resin to the plastic base material is better, the hydroxyl acrylic resin with the glass transition temperature Tg of 50 ℃, 60 ℃ or 70 ℃ is matched with the thermoplastic acrylic resin with the glass transition temperature Tg of 50 ℃, 60 ℃ or 70 ℃ for use, so that the compatibility is better, the stability of the product can be improved by double-component configuration, and the water resistance and the interlayer adhesion of a coating can be improved by the hydroxyl acrylic resin.
Preferably, the cellulose acetate butyrate resin is one or more of CAB-381-0.2, CAB-381-0.5 and CAB-551-0.01. The CAB contains hydroxyl, and can react with amino resin in the presence of an acid catalyst, so that the hardness of the CAB is not influenced, the flexibility of the coating is endowed, and the CAB has good adhesive force, so that the coating has extremely high gloss.
Preferably, the adhesion promoter is LTW and/or ADP; the LTW is preferably a product of Degussa company, the adhesion promoting resin LTW is a soft auxiliary resin with special purpose, has wide compatibility, is used for improving the inner layer adhesion of different base materials to metal inorganic substances and certain plastic adhesion coatings, and has the function of improving the interlayer adhesion between materials and UV.
The auxiliary agent is one or more of oxidized polyethylene polyamide 6900, NS-5501 or NS-5503; the assistant has the function of preventing the pearl silver powder from generating hard agglomeration during storage.
The pigment and filler is one or more of pearl powder, silver powder, extinction powder, talcum powder, acrylic system color paste or CAB system nano color paste.
The preparation method of the vibration wear-resistant coating comprises the following steps:
(1) preparing PU type primer: weighing thermoplastic acrylic resin and a mixed solvent of 1/4-1/6 according to a formula, uniformly mixing and dispersing, then adding hydroxyl acrylic resin and cellulose acetate butyrate, uniformly dispersing, sequentially adding an adhesion promoter, an auxiliary agent, a pigment filler and the rest of the mixed solvent under the condition of low-speed stirring, and uniformly dispersing and stirring to obtain the PU type primer;
(2) preparing UV photocuring finish paint: putting a photoinitiator into 1/5-1/7 mixed solvent, dispersing by a dispersion machine at the rotation speed of 200 plus 400r/min, uniformly stirring until no particles exist, filtering by 300-mesh filter cloth, dispersing by the dispersion machine at the rotation speed of 600 plus 1000r/min and the time of 20-25min, sequentially adding dissolved light guiding agent, leveling agent, dispersing agent and matting powder, dispersing by the dispersion machine at the rotation speed of 600 plus 1000r/min and the time of 45-60min, adding wax slurry dispersion machine at the rotation speed of 600 plus 800r/min and the time of 15-20min, adding the rest mixed solvent at the rotation speed of 500 plus 700r/min and the time of 15-20min, and obtaining the UV photocuring finish paint.
A spraying process of the vibration wear-resistant coating comprises the following steps:
(A) spraying a primer: before spraying, PU priming paint: HDI curing agent: adding an HDI curing agent and boiled oil water into PU type primer according to the weight component ratio of 100:4:150, mixing to obtain a primer sample, spraying the primer sample on the surface of a plastic PC substrate for 1-2 times, wherein the spraying thickness is 8-10 mu m, standing for 3min after spraying, and then vulcanizing at 80 ℃ for 60 min;
(B) spraying finish paint: before spraying, UV photocuring finish paint: boiling oil water is 100: 50, adding boiled oil water into the UV light-cured finish paint, mixing to obtain a finish paint sample, spraying the finish paint sample on the surface of the plastic PC base material sprayed with the PU primer in the step (A), wherein the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃ after spraying, the temperature is 4-6min, and then, in a UV curing machine, the energy is 650-750mJ/cm2The film is formed by curing, and the gloss is 93 degrees and 60 degrees incident angle.
Compared with the prior art, the invention has the following advantages:
the invention provides a special UV photocuring finish paint for vibration wear resistance, which comprises 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of dispersing agent, 0.5-1 part of flatting agent, 0-10 parts of flatting powder, 0-25 parts of wax slurry, 0-10 parts of photoinitiator and 20-30 parts of mixed solvent, wherein the high-functionality polyurethane acrylate can provide adhesion, flexibility and wear resistance, the hexafunctionality polyurethane acrylate provides adhesion and hardness, the tetrafunctionality polyurethane acrylate provides adhesion and leveling property, the difunctional polyurethane acrylate provides flexibility, the dispersing agent improves the storage property and the appearance fineness, the dispersing agent improves the appearance leveling property and the fullness of a product, the extinction powder is used for adjusting the gloss of products to meet different requirements of customers, the wax slurry improves the smoothness and transparency of the products, and the photoinitiator and the mixed solvent are combined, so that the UV photocuring finish paint has good transparency and high fullness.
The invention provides a vibration wear-resistant coating, which comprises a PU type primer and a UV photocuring finish, wherein the PU type primer comprises 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of an adhesion promoter, 2-4 parts of an auxiliary agent, 15-25 parts of a pigment filler and 20-30 parts of a mixed solvent, the thermoplastic acrylic resin can improve the adhesion to a PC (polycarbonate) substrate, the hydroxyl acrylic resin is used for improving the water resistance and the interlayer adhesion of a coating, the cellulose acetate butyrate improves the arrangement and the metal texture of pearlescent silver light, the adhesion promoter improves the interlayer adhesion between the PC substrate and the UV, the auxiliary agent prevents the pearlescent silver powder from generating hard agglomeration in storage, and the pigment filler and the mixed solvent are combined, so that the prepared PU type primer has long operation time and good recoatability after being sprayed, The UV photocuring finish paint has the characteristics of boiling resistance and good color development, the components of the UV photocuring finish paint comprise 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of dispersing agent, 0.5-1 part of flatting agent, 0-10 parts of matting powder, 0-25 parts of wax slurry, 0-10 parts of photoinitiator and 20-30 parts of mixed solvent, the high-functionality polyurethane acrylate can provide adhesion, flexibility and wear resistance, the hexafunctionality polyurethane acrylate provides adhesion and hardness, the tetrafunctionality polyurethane acrylate provides adhesion and leveling property, the difunctional polyurethane acrylate provides flexibility, the dispersing agent improves the storage property and appearance fineness of a product, the dispersing agent improves the appearance leveling property and fullness of the product, the flatting powder is used for adjusting the gloss of a product to meet different requirements of customers, the slip degree and the transparency of the product are improved by wax slurry, and then a photoinitiator and a mixed solvent are combined, so that the UV photocuring finish paint has good transparency and high fullness.
The preparation method of the vibration wear-resistant coating is simple to process and low in cost, the prepared vibration wear-resistant coating is applied to a mobile phone (plastic material) frame or a mobile phone side key, vibration wear resistance and durability of a product can be improved, a paint film can be prevented from falling off after long-time use, and the problems that the vibration wear resistance of the paint film is poor, the paint film falls off after long-time use and other performance uncertainty are solved.
The spraying process of the vibration wear-resistant coating comprises the steps of firstly spraying one to two layers of priming paint on a plastic substrate, then spraying finish paint, and after the plastic PC substrate is sprayed, testing vibration wear resistance for more than 2 hours, wherein the edges/top corners have no point wear or discontinuous linear wear (no more than 1mm x 1mm), the worn edges have no obvious continuous saw teeth, and other parts have no wear.
Detailed Description
The following describes a specific embodiment of the present invention with reference to specific examples 1 to 19:
example 1:
a preparation method of PU type priming paint special for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 1, weighing the solid thermoplastic acrylic resin and 9/24 mixed solvent according to the formula, and uniformly mixing and dispersing to obtain a first mixture; uniformly dispersing hydroxyl acrylic resin, cellulose acetate butyrate and the first mixture to obtain a second mixture; respectively mixing silver powder and a mixed solvent according to the proportion of 1: 1, uniformly stirring, and then soaking for 4H to obtain a mixture silver paste; under the condition of low-speed stirring, sequentially adding the adhesion promoter, the auxiliary agent, the mixture silver paste and the mixed solvent into the second mixture according to the mass ratio, and uniformly dispersing and stirring. And obtaining the PU type priming paint.
A spraying process of PU type priming paint special for vibration wear resistance comprises the following steps:
adding an HDI curing agent and boiled oil and water into the mixed ink according to the weight components before spraying, and mixing (PU priming paint: HDI curing agent: boiled oil and water: 100:4: 150); spraying the prepared PU type primer special for vibration wear resistance on the surface of a plastic PC material, wherein the spraying thickness is 8-10 mu m, standing for 3min after spraying, and then vulcanizing at the temperature of 80 ℃ for 60 min.
Example 2:
a preparation method of PU type priming paint special for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 1, weighing the solid thermoplastic acrylic resin and 5/24 mixed solvent according to the formula, and uniformly mixing and dispersing to obtain a first mixture; uniformly dispersing hydroxyl acrylic resin, cellulose acetate butyrate and the first mixture to obtain a second mixture; respectively mixing the nano color paste and the mixed solvent according to the proportion of 1: 1, uniformly stirring, and filtering by a 300-mesh sieve to obtain a mixture nano color paste; and under the condition of low-speed stirring, sequentially and respectively adding an adhesion promoter, an auxiliary agent, the mixture nano color paste and a mixed solvent into the second mixture according to the mass ratio, and dispersing and stirring uniformly to obtain the PU type primer.
A spraying process of PU type priming paint special for vibration wear resistance comprises the following steps:
adding an HDI curing agent and boiled oil and water into the mixed ink according to the weight components before spraying, and mixing (PU priming paint: HDI curing agent: boiled oil and water: 100:4: 150); spraying the prepared PU type primer special for vibration wear resistance on the surface of a plastic PC material, wherein the spraying thickness is 8-10 mu m, standing for 3min after spraying, and then vulcanizing at the temperature of 80 ℃ for 60 min.
Example 3:
a preparation method of PU type priming paint special for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 1, weighing the solid thermoplastic acrylic resin and the solvent according to the formula, and uniformly mixing and dispersing to obtain a first mixture; uniformly dispersing hydroxyl acrylic resin, cellulose acetate butyrate and the first mixture to obtain a second mixture; respectively mixing the nano color paste and the mixed solvent according to the ratio of 2: 1, uniformly stirring, and filtering by a 300-mesh sieve to obtain a mixture nano color paste; and under the condition of low-speed stirring, sequentially and respectively adding an adhesion promoter, an auxiliary agent, the mixture nano color paste and a mixed solvent into the second mixture according to the mass ratio, and dispersing and stirring uniformly to obtain the PU type primer.
A spraying process of PU type priming paint special for vibration wear resistance comprises the following steps:
adding an HDI curing agent and boiled oil and water into the mixed ink according to the weight components before spraying, and mixing (PU priming paint: HDI curing agent: boiled oil and water: 100:4: 150); the prepared PU type primer special for vibration wear resistance is sprayed on the surface of a plastic PC material, the primer of the embodiment 1 is firstly sprayed, the spraying thickness is 8-10 mu m, the PU type primer is kept stand for 3min after being sprayed, the primer of the embodiment 3 is then sprayed on the surface of the embodiment 1, and then the PU type primer is vulcanized for 60min at the temperature of 80 ℃. And most, spraying UV light-cured finish paint on the surface of the glass.
Example 4:
a preparation method of PU type priming paint special for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 1, weighing the solid thermoplastic acrylic resin and the solvent according to the formula, and uniformly mixing and dispersing to obtain a first mixture; uniformly dispersing hydroxyl acrylic resin, cellulose acetate butyrate and the first mixture to obtain a second mixture; respectively mixing the nano color paste and the mixed solvent according to the ratio of 2: 1, uniformly stirring, and filtering by a 300-mesh sieve to obtain a mixture nano color paste; under the condition of low-speed stirring, sequentially adding an adhesion promoter, an auxiliary agent, a mixture nano color paste and a mixed solvent into the second mixture according to the mass ratio, and uniformly dispersing and stirring to obtain the PU type primer.
A spraying process of PU type priming paint special for vibration wear resistance comprises the following steps:
adding an HDI curing agent and boiled oil and water into the mixed ink according to the weight components before spraying, and mixing (PU priming paint: HDI curing agent: boiled oil and water: 100:4: 150); the prepared PU type primer special for vibration wear resistance is sprayed on the surface of a plastic PC material, the primer of the embodiment 2 is firstly sprayed, the spraying thickness is 8-10 mu m, the PU type primer is kept stand for 3min after spraying, the primer of the embodiment 4 is sprayed on the surface of the embodiment 2, and then the PU type primer is vulcanized for 60min at the temperature of 80 ℃. And most, spraying UV light-cured finish paint on the surface of the glass.
Table 1: the weight ratio of each component in the PU type primer of examples 1-4
| Components | Example 1 | Example 2 | Example 3 | Example 4 |
| Thermoplastic acrylic resin | 44 | 40 | 44 | 50 |
| Hydroxy acrylic resin | 14 | 20 | 10 | 18 |
| Cellulose acetate butyrate | 3 | 3 | 2 | 1 |
| Adhesion promoter | 2 | 2 | 1 | 2 |
| Auxiliary agent | 4 | 2 | 3 | 3 |
| Silver powder | 15 | 19 | / | / |
| CAB nano color paste | / | / | 25 | 20 |
| Mixed solvent | 24 | 24 | 20 | 30 |
Example 5:
a preparation method of a special UV photocuring finish paint for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 2, putting the photoinitiator into a butyl acetate solvent, dispersing by a dispersion machine, uniformly stirring at the rotation speed of 200-; dispersing the aliphatic polyurethane acrylate with different functionality according to the mass ratio by a dispersion machine at the rotating speed of 600-; sequentially adding the dissolved optical guiding agent, the leveling agent and the dispersing machine into the first mixture for dispersing at the rotating speed of 600-; and sequentially adding mixed ethyl acetate and a propylene glycol methyl ether acetate solvent into the second mixture at the rotating speed of 500-700r/min for 10-15min to obtain the UV photocuring finish paint.
A spraying process of UV photocuring finish paint special for vibration wear resistance comprises the following steps:
mixing the components in weight ratio before spraying (UV finish paint: 100: 50); respectively spraying the prepared UV photocuring finish paint special for vibration wear resistance on the surface of a PU primer, wherein the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃/4-6min after spraying, and then, in a UV curing machine, the energy is 650 plus 750mJ/cm2Curing to form a film; the gloss was 93 ° (60 degree incident angle).
Example 6:
a preparation method of a special UV photocuring finish paint for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 2, putting the photoinitiator into a butyl acetate solvent, dispersing by a dispersion machine, uniformly stirring at the rotation speed of 200-; dispersing the aliphatic polyurethane acrylate with different functionality according to the mass ratio by a dispersion machine at the rotating speed of 600-; sequentially adding the dissolved optical guiding agent, the leveling agent and the dispersing machine into the first mixture for dispersing at the rotating speed of 600-; and sequentially adding mixed ethyl acetate and a propylene glycol methyl ether acetate solvent into the second mixture at the rotating speed of 500-700r/min for 10-15min to obtain the UV photocuring finish paint.
A spraying process of UV photocuring finish paint special for vibration wear resistance comprises the following steps:
mixing the components in weight ratio before spraying (UV finish paint: 100: 50); respectively spraying the prepared UV photocuring finish paint special for vibration wear resistance on the surface of a PU primer, wherein the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃/4-6min after spraying, and then, in a UV curing machine, the energy is 650 plus 750mJ/cm2Curing to form a film; the gloss was 93 ° (60 degree incident angle).
Example 7:
a preparation method of a special UV photocuring finish paint for vibration wear resistance comprises the following steps:
weighing the components according to the weight ratio in the table 2, putting the photoinitiator into a butyl acetate solvent, dispersing by a dispersion machine, uniformly stirring at the rotation speed of 200-; dispersing the aliphatic polyurethane acrylate with different functionalities by a dispersion machine according to the mass ratio, wherein the rotating speed is 600-1000r/min, and the time is 20-25min to obtain a first mixture; sequentially adding the dissolved light guiding agent, the leveling agent and the dispersing agent into the first mixture, and dispersing by an extinction powder dispersing machine at the rotating speed of 800-1000r/min for 45-60min to obtain a second mixture; and adding polyethylene wax slurry into the second mixture, dispersing by a dispersion machine at the rotating speed of 600-700r/min for 15-20min, and then adding ethyl acetate and propylene glycol methyl ether acetate solvent at the rotating speed of 500-700r/min for 15-20min to obtain the UV photocuring finish paint.
A spraying process of UV photocuring finish paint special for vibration wear resistance comprises the following steps:
before spraying, oil and water are mixed according to the weight components (the ratio of the oil and the water is 100: 50), the prepared UV photocuring finish paint special for vibration wear resistance is respectively sprayed on the surface of the PU primer, the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃/4-6min after spraying, and then the energy is 650-750mJ/cm in a UV curing machine2Curing to form a film; gloss was 15 ° (60 degree incident angle).
Table 2: special UV (ultraviolet) photocuring finish paint for vibration wear resistance and components in each scheme and weight percentage
| Components | Example 5 | Example 6 | Example 7 |
| 1-hydroxycyclohexyl phenyl methanones | 3 | 3 | 8 |
| Diphenylphosphine oxide | 0.5 | 0.5 | 2 |
| Acetic acid butyl ester | 10.5 | 13.5 | 13.5 |
| High-functional aliphatic polyurethane acrylic acidResin composition | 20 | 15 | 10 |
| Hexafunctional aliphatic polyurethane acrylic resin | 15 | 25 | 20 |
| Tetrafunctional aliphatic polyurethane acrylic resin | 28 | 20 | 15 |
| Difunctional aliphatic polyurethane acrylic resin | 8 | 10 | 4 |
| Leveling agent | 0.5 | 1 | 0.5 |
| Dispersing agent | 0.5 | 0.5 | 1 |
| Matting powder | 0 | 10 | 7.5 |
| Polyethylene wax slurry | 25 | 0 | 14 |
| Acetic acid ethyl ester | 6 | 9 | 10 |
| Propylene glycol methyl ether acetate | 3.5 | 5.5 | 6.5 |
A spraying process of vibration wear-resistant paint comprises the following steps according to the combination scheme shown in Table 3:
(A) spraying a primer: before spraying, PU priming paint: HDI curing agent: adding an HDI curing agent and boiled oil water into PU type primer according to the weight component ratio of 100:4:150, mixing to obtain a primer sample, spraying the primer sample on the surface of a plastic PC substrate for 1-2 times, wherein the spraying thickness is 8-10 mu m, standing for 3min after spraying, and then vulcanizing at 80 ℃ for 60 min;
(B) spraying finish paint: before spraying, UV photocuring finish paint: boiling oil water is 100: 50, adding boiled oil and water into the UV light-cured finish paint, mixing to obtain a finish paint sample, spraying the finish paint sample on the surface of the plastic PC substrate sprayed with the PU primer in the step (A), wherein the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃ after spraying, the temperature is 4-6min, and then, in a UV curing machine, the energy is 650 plus 750mJ/cm2The film is formed by curing, and the gloss is 93 degrees and 60 degrees incident angle.
TABLE 3 spray coating Process for each combination
| Examples | Combination scheme |
| Example 8 | Example 1PU primer + example 5UV topcoat |
| Example 9 | Example 1PU primer + example 6UV topcoat |
| Example 10 | Example 1PU primer + example 7UV topcoat |
| Example 11 | Example 2PU primer + example 5UV topcoat |
| Example 12 | Example 2PU primer + example 6UV topcoat |
| Example 13 | Example 2PU primer + example 7UV topcoat |
| Example 14 | Example 1PU primer + PU primer example 3+ example 5UV topcoat |
| Example 15 | Example 1PU primer + PU primer example 3+ example 6UV topcoat |
| Example 16 | Example 1PU primer + PU primer example 3+ example 7UV topcoat |
| Example 17 | Example 2PU primer + PU primer example 4+ example 5UV topcoat |
| Example 18 | Example 2PU primer + PU primer example 4+ example 6UV topcoat |
| Example 19 | Example 2PU primer + PU primer example 4+ example 7UV topcoat |
The finished products of examples 8-19 were tested for performance as shown in Table 4 and the results in Table 5:
table 4: performance test standards and methods
Table 5: examples 8 to 19 test results of Properties of painted surfaces
According to the comparative experiments, the paint film prepared by the embodiment of the application has better wear resistance, adhesive force and weather resistance, and after the paint film is sprayed on a plastic PC substrate, the paint film is subjected to vibration wear resistance test for more than 2 hours, discontinuous linear wear (no more than 1mm x 1mm) is generated at the edges/vertex angles, no obvious continuous saw teeth are generated at the worn edges, and no wear is generated at other parts. The invention provides a vibration wear-resistant coating, which comprises a PU type primer and a UV photocuring finish, wherein the PU type primer comprises 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of an adhesion promoter, 2-4 parts of an auxiliary agent, 15-25 parts of a pigment filler and 20-30 parts of a mixed solvent, the thermoplastic acrylic resin can improve the adhesion to a PC (polycarbonate) substrate, the hydroxyl acrylic resin is used for improving the water resistance and the interlayer adhesion of a coating, the cellulose acetate butyrate improves the arrangement and the metal texture of pearlescent silver light, the adhesion promoter improves the interlayer adhesion between the PC substrate and the UV, the auxiliary agent prevents the pearlescent silver powder from generating hard agglomeration in storage, and the pigment filler and the mixed solvent are combined, so that the prepared PU type primer has long operation time and good recoatability after being sprayed, The UV photocuring finish paint has the characteristics of boiling resistance and good color development, the components of the UV photocuring finish paint comprise 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of a dispersing agent, 0.5-1 part of a leveling agent, 0-10 parts of a matting powder, 0-25 parts of a wax slurry, 0-10 parts of a photoinitiator and 20-30 parts of a mixed solvent, the high-functionality polyurethane acrylate is selected to provide adhesion, flexibility and wear resistance, the hexafunctionality polyurethane acrylate provides adhesion and hardness, the tetrafunctionality polyurethane acrylate provides adhesion and leveling property, the difunctional polyurethane acrylate provides flexibility, the dispersing agent improves the storage property and the appearance fineness of a product, and the dispersing agent improves the appearance leveling property and the fullness of the product, the extinction powder is used for adjusting the gloss of a product to meet different requirements of customers, the wax slurry improves the smoothness and transparency of the product, and the photoinitiator and the mixed solvent are combined, so that the UV photocuring finish paint has good transparency and high fullness.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a special UV photocuring finish paint of wear-resisting vibration which characterized in that: the UV photocuring finish paint special for vibration wear resistance comprises the following components in parts by mass: 10-20 parts of high-functionality polyurethane acrylate, 15-25 parts of hexafunctionality polyurethane acrylate, 15-28 parts of tetrafunctionality polyurethane acrylate, 4-10 parts of difunctional polyurethane acrylate, 0.5-1 part of dispersing agent, 0.5-1 part of flatting agent, 0-10 parts of matting powder, 0-25 parts of wax slurry, 3.5-10 parts of photoinitiator and 20-30 parts of mixed solvent.
2. The UV light-cured finish paint special for vibration wear resistance according to claim 1, is characterized in that: the high-functionality polyurethane acrylate is aliphatic polyurethane acrylate with the functionality of 9 or aliphatic polyurethane acrylate with the functionality of 10;
the hexa-functionality polyurethane acrylate is aliphatic polyurethane acrylate with the functionality of 6;
the tetrafunctional polyurethane acrylate is solvent-type aliphatic polyurethane acrylate with the functionality of 4;
the difunctional urethane acrylate is an aliphatic urethane acrylate having a functionality of 2.
3. The UV light-cured finish paint special for vibration wear resistance according to claim 1, is characterized in that: the mixed solvent is one or a combination of more of ethyl acetate, butyl acetate, isopropanol, ethylene glycol butyl ether, isopropyl acetate, propylene glycol methyl ether acetate and diacetone alcohol.
4. The UV light-cured finish paint special for vibration wear resistance according to claim 1, is characterized in that: the dispersant is AFCONA4010 and/or AFCONA 4053;
the leveling agent BYK333 and/or TEGO 410;
the extinction powder is E-1011 and/or C-803;
the wax slurry is polyethylene wax slurry;
the photoinitiator is 1-hydroxycyclohexyl phenyl ketone and/or diphenyl phosphine oxide.
5. A vibration wear-resistant coating is characterized in that: the special UV photocuring finish paint for the vibration wear resistance comprises a PU primer, an HDI curing agent and the special UV photocuring finish paint for the vibration wear resistance, wherein the PU primer comprises the following components in parts by mass: 40-50 parts of thermoplastic acrylic resin, 10-20 parts of hydroxyl acrylic resin, 1-3 parts of cellulose acetate butyrate, 1-2 parts of adhesion promoter, 2-4 parts of assistant, 15-25 parts of pigment and filler and 20-30 parts of mixed solvent, wherein the PU type primer and the HDI curing agent are mixed together to prepare the primer.
6. A vibration and wear resistant coating as claimed in claim 5, wherein said thermoplastic acrylic resin is selected from one or more of resins having a glass transition temperature of 50 ℃, 60 ℃ or 70 ℃.
7. A vibration wear-resistant coating according to claim 5, wherein the hydroxyl acrylic resin is one or more of resins with a glass transition temperature of 50 ℃, 60 ℃ or 70 ℃, and the hydroxyl value of the hydroxyl acrylic resin is 10, 15 or 20.
8. A vibration abrasion resistant coating according to claim 5, wherein: the cellulose acetate butyrate resin is one or more of CAB-381-0.2, CAB-381-0.5 and CAB-551-0.01;
the adhesion promoter is LTW and/or ADP;
the auxiliary agent is one or more of oxidized polyethylene polyamide 6900, NS-5501 or NS-5503;
the pigment and filler is one or more of pearl powder, silver powder, extinction powder, talcum powder, acrylic system color paste or CAB system nano color paste.
9. A method for preparing a vibration wear-resistant coating according to any one of claims 5 to 8, characterized by comprising the following steps:
(1) preparing PU type primer: weighing thermoplastic acrylic resin and part of mixed solvent according to a formula, uniformly mixing and dispersing, then adding hydroxyl acrylic resin and cellulose acetate butyrate, uniformly dispersing, sequentially adding an adhesion promoter, an auxiliary agent, a pigment and a filler and the rest of the mixed solvent under the condition of low-speed stirring, and uniformly dispersing and stirring to obtain the PU type primer;
(2) preparing UV photocuring finish paint: putting a photoinitiator into 1/5-1/7 mixed solvent, dispersing by a dispersion machine at the rotation speed of 200 plus materials and 400r/min until no particles exist, filtering by 300-mesh filter cloth, dispersing by the dispersion machine at the rotation speed of 600 plus materials and 1000r/min for 20-25min, then sequentially adding dissolved light-guiding agent, leveling agent, dispersing agent and matting powder, dispersing by the dispersion machine at the rotation speed of 600 plus materials and 1000r/min for 45-60min, then adding wax slurry dispersion machine at the rotation speed of 600 plus materials and 800r/min for 15-20min, then adding the rest mixed solvent at the rotation speed of 500 plus materials and 700r/min for 15-20min, and obtaining the UV photocuring finish paint.
10. A spraying process of the vibration abrasion-resistant coating according to any one of claims 5 to 8, characterized by comprising the following steps:
(A) spraying a primer: before spraying, PU type priming paint is used: HDI curing agent: adding an HDI curing agent and the boiled oil water into the PU type primer according to the weight component ratio of 100:4:150, mixing to obtain a primer sample, spraying the primer sample on the surface of the plastic PC base material for 1-2 times, wherein the spraying thickness is 8-10 mu m, standing for 3min after spraying, and then vulcanizing for 60min at the temperature of 80 ℃;
(B) spraying finish paint: before spraying, UV photocuring finish paint: boiling oil water is 100: 50, adding boiled oil and water into the UV light-cured finish paint, mixing to obtain a finish paint sample, spraying the finish paint sample on the surface of the plastic PC substrate sprayed with the PU type primer in the step (A), wherein the spraying thickness is 18-23 mu m, the infrared ray is 50-60 ℃ after spraying, the temperature is 4-6min, and then, in a UV curing machine, the energy is 650 plus 750mJ/cm2The film is formed by curing, and the gloss is 93 degrees and 60 degrees incident angle.
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| CN114763451B (en) * | 2021-10-20 | 2023-03-17 | 上海君子兰新材料股份有限公司 | Fast-curing UV (ultraviolet) water-based solid-color finish paint and preparation method thereof |
| CN114045105B (en) * | 2021-11-30 | 2022-08-05 | 苏州市贝特利高分子材料股份有限公司 | Water-based paint for keyboard and preparation method thereof |
| CN114350247B (en) * | 2021-12-27 | 2023-03-14 | 惠州市凯辉化工有限公司 | UV (ultraviolet) finish paint for TPU (thermoplastic polyurethane)/PC (polycarbonate) double-layer material film covering material and preparation method thereof |
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| CN116063919B (en) * | 2022-11-24 | 2024-01-30 | 长沙广欣新材料科技有限公司 | Adhesive resin for glazing melamine board UV (ultraviolet) coating film |
| CN116285650A (en) * | 2023-03-27 | 2023-06-23 | 华容县恒兴建材有限公司 | Ultra-wear-resistant high-temperature-resistant stone powder and PVC material floor ultraviolet light curing coating and preparation method thereof |
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