High-scratch-resistance UV (ultraviolet) coating for furniture film as well as preparation method and application of high-scratch-resistance UV coating

Abstract

The invention relates to the technical field of high polymer materials, in particular to a high-scratch-resistance UV coating for a furniture film and a preparation method and application of the high-scratch-resistance UV coating. The high-scratch-resistance UV coating for the furniture film comprises a gloss oil component A and a matt oil component B. The gloss oil component A and the matt oil component B are uniformly mixed according to the weight ratio of 100: 50 to obtain the UV coating. PMMA microspheres are adopted and matched with organic silicon modified polyurethane acrylate, under the synergistic effect, the soft, fine and matte effects are achieved, and meanwhile the scratch resistance of the furniture film is greatly improved. The UV coating has better scratch resistance and stain resistance, so that the UV coating can effectively resist scraping and abrasion in daily use and cleaning processes, and the surface of the furniture film is protected from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to a highly scratch-resistant UV coating for furniture films, a preparation method and application thereof. Background Art

[0002] With the rapid development of the modern home furnishing industry, consumers have put forward higher requirements on the aesthetics, durability and environmental protection of furniture. As an important material for protecting the surface of furniture, the surface quality and durability of furniture film directly affect the overall quality of furniture and consumers' usage experience.

[0003] Existing furniture film coatings often have poor scratch resistance and are prone to scratches and wear during long-term use and cleaning; although the existing matte UV coating can give the furniture surface a soft texture and layering, it will affect the wear resistance and adhesion of the coating; UV curing technology has the characteristics of fast curing speed and excellent film-forming performance, but when applied to furniture film coatings, shrinkage and warping may occur during the curing process. Summary of the invention

[0004] In order to solve the problems in the related art, the present invention provides a high scratch-resistant UV coating for furniture film, a preparation method and application thereof, which solves the problem of poor scratch resistance of UV coating, has good wear resistance and strong adhesion while having a matte effect, and will not cause shrinkage and warping problems during UV curing.

[0005] In order to solve the above problems, the following technical solutions are provided:

[0006] A highly scratch-resistant UV coating for furniture film of the present invention comprises a varnish component A and a matt oil component B;

[0007] The varnish component A comprises the following raw materials in parts by weight:

[0008] The weight proportion of high-functional polyurethane acrylate is 30-40 parts, the weight proportion of organosilicon-modified polyurethane acrylate is 10-20 parts, the weight proportion of 2-6 functional acrylic monomer is 5-10 parts, the weight proportion of alcohol ether solvent is 5-10 parts, the weight proportion of ester solvent is 10-20 parts, the weight proportion of photoinitiator is 1-5 parts, and the weight proportion of hydrophobic additive is 0.1-1 parts;

[0009] The matt oil component B comprises the following raw materials in parts by weight:

[0010] The weight proportion of macromolecular thermoplastic acrylate is 30-40 parts, the weight proportion of alcohol ether solvent is 5-10 parts, the weight proportion of ester solvent is 10-20 parts, the weight proportion of wetting dispersant is 0.2-0.5 parts, the weight proportion of PMMA microsphere is 10-20 parts, the weight proportion of matting powder is 1-10 parts, and the weight proportion of anti-settling agent is 1-2 parts.

[0011] Through the above scheme, the present invention reasonably matches the raw material components with different functions, so as to achieve the best synergistic effect between the different raw material components. By adding high-functional polyurethane acrylate, the hardness of the UV coating can be significantly improved, making it more wear-resistant and scratch-resistant; by adding silicone-modified polyurethane acrylate, the heat resistance and weather resistance of the UV coating can be improved; by adding alcohol ether solvents, the leveling property of the UV coating can be improved, and the problems of shrinkage cavities and wrinkles in the UV coating can be prevented; by adding ester solvents, it is beneficial to improve the adhesion of the UV coating, so that it can better adhere to the surface of the workpiece, enhance the firmness of the UV coating, and reduce the shrinkage rate of the UV coating during the curing process, thereby reducing the surface of the coating. cracks and deformation, and can significantly improve the fluidity and curing effect of UV coatings; by adding photoinitiators, the curing speed is significantly increased; by adding hydrophobic additives, it is used to improve the stain resistance and cleanability of UV coatings; by adding matting powder, the feel and fineness of the surface of UV coatings are improved, and the curing shrinkage of UV coatings during the curing process is reduced, thereby reducing cracks and deformation on the coating surface, and effectively solving the problems of shrinkage and warping during UV curing; by adding PMMA microspheres, a soft and delicate matte effect is achieved, and the UV coating can have better scratch resistance, so that it can effectively resist scratches and wear during daily use and cleaning, and protect the surface of the furniture film from damage.

[0012] The high-functional polyurethane acrylate is a hexafunctional polyurethane acrylate; the 2-6 functional acrylic monomer is any one or a combination of dipentaerythritol hexaacrylate, trimethylolpropane trimethacrylate, and pentaerythritol triacrylate; the alcohol ether solvent is any one or a combination of propylene glycol methyl ether and ethylene glycol butyl ether; the ester solvent is any one or a combination of ethyl acetate and butyl acetate; the photoinitiator is any one or a combination of 1-hydroxy-cyclohexyl-phenyl ketone, benzophenone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide; and the hydrophobic additive is modified siloxane.

[0013] The macromolecular thermoplastic acrylate is an acrylate resin; the wetting and dispersing agent is a high molecular polymer containing pigment affinity groups; the matting powder is silicon dioxide; and the anti-settling agent is a polyhydroxycarboxylic acid amide solution and a polyamide wax.

[0014] A method for preparing a highly scratch-resistant UV coating for furniture films comprises the following steps:

[0015] S1, preparation of varnish component A: firstly, high-functional polyurethane acrylate, organosilicon-modified polyurethane acrylate, 2-6 functional acrylic monomer, alcohol ether solvent and ester solvent are put into cylinder X and stirred evenly; then, photoinitiator, hydrophobic auxiliary agent and ester solvent are put into cylinder Y and stirred evenly to obtain mixture 1, and mixture 1 is put into cylinder X and stirred evenly to obtain varnish component A;

[0016] S2, preparation of matt oil component B: macromolecular thermoplastic acrylate, alcohol ether solvent, ester solvent and wetting dispersant are added to cylinder Z in sequence and stirred evenly, and then PMMA microspheres and matting powder are added and stirred evenly to obtain mixture 2, the mixture 2 is ground, and the ground mixture 2 is stirred, and an anti-settling agent is added during the stirring process, and the matt oil component B is obtained by stirring evenly;

[0017] S3, mixing the varnish component A prepared in S1 and the matt oil component B prepared in S2 at a weight ratio of 100:50, and stirring evenly to obtain a UV coating.

[0018] Through the above scheme, the method is adopted to prepare UV coating, the operation steps are simple, and the addition order of different raw materials, temperature, stirring and other conditions are reasonably arranged, so that the finally obtained UV coating has good scratch resistance and wear resistance, which is beneficial to improving the adhesion and hardness of the UV coating. In addition, the raw materials used in the present invention meet environmental protection standards, have low volatile organic compound emissions, and help reduce environmental pollution.

[0019] S1 is stirred in cylinder X for the first time at a speed of 300-500 rpm for 20-30 min; the speed of stirring in cylinder Y is 200-300 rpm for 10-15 min; the mixture 1 is added and stirred again in cylinder X at a speed of 300-500 rpm for 5-10 min.

[0020] S2 is initially stirred in the Z cylinder at a speed of 300-500 rpm for 10-20 min; PMMA microspheres and matting powder are added and stirred at a speed of 300-500 rpm for 20-30 min; the mixture 2 is ground to a fineness of less than 10 μm; an anti-settling agent is added and stirred at a speed of 300-500 rpm for 10-15 min.

[0021] The invention discloses an application of a highly scratch-resistant UV coating for furniture films. The UV coating is applied to the surface of a workpiece by a UV coating roller, baked at 55-65°C for 5-8 minutes, and irradiated with ultraviolet light to obtain a UV coating.

[0022] Through the above scheme, the UV coating is quickly cured by ultraviolet irradiation, thereby improving production efficiency so as to form a strong UV coating.

[0023] The light intensity energy of UV coating is 100-150mW / cm 2 , exposure energy is 800-1500mJ / cm 2 .

[0024] The thickness of the UV coating is 5-10 μm.

[0025] The above solution has the following advantages:

[0026] 1. The preparation method of the present invention has simple operation steps in the process of preparing UV coating, and the addition order of different raw materials, temperature, stirring and other conditions are reasonably arranged, so that the finally obtained UV coating has good scratch resistance and wear resistance, which is beneficial to improving the adhesion and hardness of the UV coating. The raw materials used in the present invention meet environmental protection standards and have low volatile organic compound emissions, which helps to reduce environmental pollution. By adding PMMA microspheres, a soft and delicate matte effect can be achieved, and the UV coating can have better scratch resistance, so that it can effectively resist scratches and wear during daily use and cleaning, and protect the surface of the furniture film from damage.

[0027] 2. By adding high-functional polyurethane acrylate, the hardness of the UV coating can be significantly improved, making it more wear-resistant and scratch-resistant. By adding matting powder, the feel and fineness of the UV coating surface can be improved, and the curing shrinkage of the UV coating during the curing process can be reduced, thereby reducing cracks and deformation on the coating surface, and preventing shrinkage and warping problems during UV curing.

[0028] 3. Adding alcohol ether solvents can improve the leveling of UV coatings and prevent problems such as shrinkage holes and wrinkles in UV coatings. Adding ester solvents can help improve the adhesion of UV coatings, allowing them to better adhere to the surface of furniture film and enhance the firmness of UV coatings.

[0029] 4. Adding photoinitiators is helpful to improve the curing effect of UV coatings. When exposed to ultraviolet rays, the UV coating cures quickly, improving production efficiency and forming a strong UV coating. The weather resistance of the UV coating is improved by adding silicone-modified polyurethane acrylate. DETAILED DESCRIPTION

[0030] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The embodiments of the present application are a highly scratch-resistant UV coating for furniture films, a preparation method thereof, and applications thereof.

[0032] Step 1: Prepare raw materials of different weights

[0033] Example 1: A highly scratch-resistant UV coating for furniture film, comprising the following raw materials in parts by weight:

[0034] The varnish component A is composed of the following raw materials in parts by weight:

[0035] The weight proportion of hexafunctional polyurethane acrylate is 30 parts, the weight proportion of organosilicon-modified polyurethane acrylate is 10 parts, the weight proportion of dipentaerythritol hexaacrylate is 5 parts, the weight proportion of propylene glycol methyl ether is 5 parts, the weight proportion of ethyl acetate is 10 parts, the weight proportion of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide is 1 part, and the weight proportion of modified siloxane is 0.1 parts;

[0036] The matt oil component B is composed of the following raw materials in parts by weight:

[0037] The weight proportion of the acrylic resin is 30 parts, the weight proportion of propylene glycol methyl ether is 5 parts, the weight proportion of ethyl acetate is 10 parts, the weight proportion of the high molecular polymer containing pigment affinity groups is 0.2 parts, the weight proportion of PMMA microspheres is 10 parts, the weight proportion of silicon dioxide is 10 parts, and the weight proportion of polyamide wax is 1 part.

[0038] Example 2: A highly scratch-resistant UV coating for furniture film, comprising the following raw materials in parts by weight:

[0039] The varnish component A comprises the following raw materials in parts by weight:

[0040] The weight proportion of hexafunctional polyurethane acrylate is 35 parts, the weight proportion of silicone-modified polyurethane acrylate is 15 parts, the weight proportion of trimethylolpropane trimethacrylate is 8 parts, the weight proportion of propylene glycol methyl ether is 8 parts, the weight proportion of butyl acetate is 15 parts, the weight proportion of 1-hydroxy-cyclohexyl-phenyl ketone is 3 parts, and the weight proportion of modified siloxane is 0.5 parts;

[0041] The matt oil component B comprises the following raw materials in parts by weight:

[0042] The weight proportion of the acrylic resin is 35 parts, the weight proportion of ethylene glycol butyl ether is 8 parts, the weight proportion of ethyl acetate is 15 parts, the weight proportion of the high molecular polymer containing pigment affinity groups is 0.3 parts, the weight proportion of PMMA microspheres is 15 parts, the weight proportion of silicon dioxide is 5 parts, and the weight proportion of polyamide wax is 1.5 parts.

[0043] Example 3: A highly scratch-resistant UV coating for furniture film, comprising the following raw materials in parts by weight:

[0044] The varnish component A comprises the following raw materials in parts by weight:

[0045] The weight proportion of hexafunctional polyurethane acrylate is 40 parts, the weight proportion of silicone-modified polyurethane acrylate is 20 parts, the weight proportion of pentaerythritol triacrylate is 10 parts, the weight proportion of ethylene glycol butyl ether is 10 parts, the weight proportion of butyl acetate is 20 parts, the weight proportion of benzophenone is 5 parts, and the weight proportion of modified siloxane is 1 part;

[0046] The matt oil component B comprises the following raw materials in parts by weight:

[0047] The weight proportion of the acrylic resin is 40 parts, the weight proportion of propylene glycol methyl ether is 10 parts, the weight proportion of ethyl acetate is 20 parts, the weight proportion of the high molecular polymer containing the pigment affinity group is 0.5 parts, the weight proportion of the PMMA microspheres is 20 parts, the weight proportion of the silicon dioxide is 1 part, and the weight proportion of the polyhydroxycarboxamide solution is 2 parts.

[0048] Comparative Example 1: A highly scratch-resistant UV coating for furniture film, comprising the following raw materials in parts by weight:

[0049] The varnish component A comprises the following raw materials in parts by weight:

[0050] The weight proportion of hexafunctional polyurethane acrylate is 20 parts, the weight proportion of silicone-modified polyurethane acrylate is 5 parts, the weight proportion of trimethylolpropane trimethacrylate is 3 parts, the weight proportion of propylene glycol methyl ether is 3 parts, the weight proportion of butyl acetate is 5 parts, the weight proportion of 1-hydroxy-cyclohexyl-phenyl ketone is 0.5 parts, and the weight proportion of modified siloxane is 0.05 parts;

[0051] The matt oil component B comprises the following raw materials in parts by weight:

[0052] The weight proportion of the acrylic resin is 20 parts, the weight proportion of propylene glycol methyl ether is 3 parts, the weight proportion of ethyl acetate is 5 parts, the weight proportion of the high molecular polymer containing the pigment affinity group is 0.1 parts, the weight proportion of the PMMA microspheres is 5 parts, the weight proportion of the silicon dioxide is 15 parts, and the weight proportion of the polyamide wax is 0.5 parts.

[0053] Comparative Example 2: A highly scratch-resistant UV coating for furniture film, comprising the following raw materials in parts by weight:

[0054] The varnish component A comprises the following raw materials in parts by weight:

[0055] The weight proportion of hexafunctional polyurethane acrylate is 50 parts, the weight proportion of silicone-modified polyurethane acrylate is 30 parts, the weight proportion of trimethylolpropane trimethacrylate is 15 parts, the weight proportion of propylene glycol methyl ether is 15 parts, the weight proportion of butyl acetate is 30 parts, the weight proportion of 1-hydroxy-cyclohexyl-phenyl ketone is 8 parts, and the weight proportion of modified siloxane is 2 parts;

[0056] The matt oil component B comprises the following raw materials in parts by weight:

[0057] The weight proportion of the acrylic resin is 50 parts, the weight proportion of propylene glycol methyl ether is 15 parts, the weight proportion of ethyl acetate is 30 parts, the weight proportion of the high molecular polymer containing pigment affinity groups is 1 part, the weight proportion of PMMA microspheres is 30 parts, the weight proportion of silicon dioxide is 0.5 parts, and the weight proportion of polyamide wax is 3 parts.

[0058] Step 2: A method for preparing a highly scratch-resistant UV coating for furniture film, comprising the following steps:

[0059] S1. Prepare materials: weigh all raw materials according to the above formula ratio and set aside;

[0060] S2, firstly put high-functional polyurethane acrylate, silicone-modified polyurethane acrylate, 2-6 functional acrylic monomer, alcohol ether solvent and ester solvent into cylinder X, and stir at a speed of 300-500 rpm for 20-30 min; then put the photoinitiator, hydrophobic auxiliary agent and ester solvent into cylinder Y, and stir at a speed of 200-300 rpm for 10-15 min to obtain mixture 1, put the mixture 1 into cylinder X, and stir at a speed of 300-500 rpm for 5-10 min to obtain varnish component A;

[0061] S3, in the Z cylinder, add macromolecular thermoplastic acrylate, alcohol ether solvent, ester solvent and wetting dispersant in sequence, stir at a speed of 300-500 rpm for 10-20 min, then add PMMA microspheres and matting powder, stir at a speed of 300-500 rpm for 20-30 min to obtain mixture 2, grind the mixture 2 to a fineness of less than 10 μm, stir the ground mixture 2 at a speed of 300-500 rpm, add an anti-settling agent during the stirring process, stir at a speed of 300-500 rpm for 10-15 min, and obtain the matt oil component B;

[0062] S4. The varnish component A prepared in S2 and the matt oil component B prepared in S3 are mixed in a weight ratio of 100:50, and stirred at a speed of 200-300 rpm for 10-15 min to obtain a UV coating.

[0063] Step 3: Application of a highly scratch-resistant UV coating on furniture film

[0064] Prepare a transparent PET film. After cleaning the transparent PET film with isopropyl alcohol, dilute the UV coating prepared by S4 with ethyl acetate to a solid content of 30%, apply it on the surface of the transparent PET film with a roller, bake it at 55-65°C for 5-8 minutes, and irradiate it with ultraviolet light to obtain a UV coating. The light intensity energy of the UV coating is 100-150mW / cm 2 , exposure energy is 800-1500mJ / cm 2 , the thickness of UV coating is 5-10μm.

[0065] Step 4: Experimental Data

[0066]

[0067]

[0068] Experimental conclusion:

[0069] PMMA microspheres are a material with a narrow particle size distribution, high purity and high consistency. As shown in Examples 1-3, as the number of PMMA microspheres in the formula increases, the hardness, scratch resistance and wear resistance are significantly improved. As shown in Comparative Example 2, when the number of PMMA microspheres increases to a certain extent, the gloss does not decrease significantly, and the wear resistance, hardness and adhesion decrease. The main reason is that there is not enough high-functional polyurethane acrylate, silicone-modified polyurethane acrylate and 2-6 functional acrylic monomer to wrap the PMMA microspheres, which reduces the bonding strength between PMMA. When subjected to external force, the PMMA microspheres are peeled off from the paint film. A suitable proportion of high-functional polyurethane acrylate, silicone-modified polyurethane acrylate and 2-6 functional acrylic monomer is selected to match the PMMA microspheres, so that a dense and uniform protective film is formed on the surface of the UV coating to achieve the effect of scratch resistance and stain resistance.

Claims

1. A highly scratch-resistant UV coating for furniture film, characterized in that: It includes a varnish component A and a matt oil component B; The varnish component A comprises the following raw materials in parts by weight: The weight proportion of high-functional polyurethane acrylate is 30-40 parts, the weight proportion of organosilicon-modified polyurethane acrylate is 10-20 parts, the weight proportion of 2-6 functional acrylic monomer is 5-10 parts, the weight proportion of alcohol ether solvent is 5-10 parts, the weight proportion of ester solvent is 10-20 parts, the weight proportion of photoinitiator is 1-5 parts, and the weight proportion of hydrophobic additive is 0.1-1 parts; The matt oil component B comprises the following raw materials in parts by weight: The weight proportion of macromolecular thermoplastic acrylate is 30-40 parts, the weight proportion of alcohol ether solvent is 5-10 parts, the weight proportion of ester solvent is 10-20 parts, the weight proportion of wetting dispersant is 0.2-0.5 parts, the weight proportion of PMMA microsphere is 10-20 parts, the weight proportion of matting powder is 1-10 parts, and the weight proportion of anti-settling agent is 1-2 parts.

2. A highly scratch-resistant UV coating for furniture film as claimed in claim 1, characterized in that: The high-functional polyurethane acrylate is hexafunctional polyurethane acrylate; The 2-6 functional acrylic monomer is any one or a combination of dipentaerythritol hexaacrylate, trimethylolpropane trimethacrylate, and pentaerythritol triacrylate; The alcohol ether solvent is any one or a combination of propylene glycol methyl ether and ethylene glycol butyl ether; The ester solvent is any one or a combination of ethyl acetate and butyl acetate; The photoinitiator is any one or a combination of 1-hydroxy-cyclohexyl-phenyl ketone, benzophenone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide; The hydrophobic auxiliary agent is modified siloxane.

3. The highly scratch-resistant UV coating for furniture film according to claim 1, characterized in that: The macromolecular thermoplastic acrylate is an acrylate resin; The wetting and dispersing agent is a high molecular polymer containing pigment affinity groups; The matting powder is silicon dioxide; The anti-settling agent is polyhydroxycarboxylic acid amide solution or polyamide wax.

4. The method for preparing a highly scratch-resistant UV coating for furniture film according to claim 1, characterized in that: The following steps are involved: S1, preparation of varnish component A: firstly, high-functional polyurethane acrylate, organosilicon-modified polyurethane acrylate, 2-6 functional acrylic monomer, alcohol ether solvent and ester solvent are put into cylinder X and stirred evenly; then, photoinitiator, hydrophobic auxiliary agent and ester solvent are put into cylinder Y and stirred evenly to obtain mixture 1, and mixture 1 is put into cylinder X and stirred evenly to obtain varnish component A; S2, preparation of matt oil component B: macromolecular thermoplastic acrylate, alcohol ether solvent, ester solvent and wetting dispersant are added to cylinder Z in sequence and stirred evenly, and then PMMA microspheres and matting powder are added and stirred evenly to obtain mixture 2, the mixture 2 is ground, and the ground mixture 2 is stirred, and an anti-settling agent is added during the stirring process, and the matt oil component B is obtained by stirring evenly; S3, mixing the varnish component A prepared in S1 and the matt oil component B prepared in S2 at a weight ratio of 100:50, and stirring evenly to obtain a UV coating.

5. The method for preparing a highly scratch-resistant UV coating for furniture film according to claim 4, characterized in that: S1 is stirred in cylinder X for the first time at a speed of 300-500 rpm for 20-30 min; the speed of stirring in cylinder Y is 200-300 rpm for 10-15 min; the mixture 1 is added and stirred again in cylinder X at a speed of 300-500 rpm for 5-10 min.

6. The method for preparing a highly scratch-resistant UV coating for furniture film according to claim 4, characterized in that: S2 is initially stirred in the Z cylinder at a speed of 300-500 rpm for 10-20 min; PMMA microspheres and matting powder are added and stirred at a speed of 300-500 rpm for 20-30 min; the mixture 2 is ground to a fineness of less than 10 μm; an anti-settling agent is added and stirred at a speed of 300-500 rpm for 10-15 min.

7. An application of a highly scratch-resistant UV coating on furniture film, characterized in that: Apply the UV coating roller on the surface of the workpiece, bake it at 55-65℃ for 5-8min, and irradiate it with ultraviolet light to obtain the UV coating.

8. The use of a highly scratch-resistant UV coating on furniture film as claimed in claim 7, characterized in that: The light intensity energy of the UV coating is 100-150mW / cm 2 , exposure energy is 800-1500mJ / cm 2 .

9. The use of a highly scratch-resistant UV coating on a furniture film as claimed in claim 7, characterized in that: The thickness of the UV coating is 5-10 μm.

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