Antibacterial UV gloss oil with ultrahigh water drop angle as well as preparation method and application of antibacterial UV gloss oil

Abstract

The invention provides antibacterial UV gloss oil with an ultrahigh water drop angle as well as a preparation method and application of the antibacterial UV gloss oil, and belongs to the technical field of UV gloss oil. According to the invention, decyl side branched trifunctional polyurethane acrylate and tetrafunctional polyester acrylate are adopted as matrix resin, so that the UV gloss oil has excellent adhesive force with a matrix, and trifunctional phosphate modified acrylate is added, so that the adhesive force between the UV gloss oil and the matrix is further improved; meanwhile, the UV gloss oil has high hardness after being cured, in addition, the decyl side branch chain has antibacterial activity on various bacteria, and the antibacterial property of the UV gloss oil can be improved in cooperation with the antibacterial agent; the wax slurry and the antifouling agent are added, so that the water drop angle of the UV gloss oil is increased, the loss of the antibacterial agent is avoided, and the antibacterial durability of the UV gloss oil is improved; by controlling the composition of the UV gloss oil and the dosage of each component, the adhesive force grade, hardness and water drop angle of the UV gloss oil and a substrate are improved, and meanwhile, the antibacterial property and lasting antibacterial property of the UV gloss oil are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of UV varnish, and particularly relates to an antibacterial UV varnish with an ultra-high water drop angle, a preparation method and an application thereof. Background Art

[0002] To improve the appearance and durability of plastic and hardware products, UV varnish is often applied to their surfaces. Existing UV varnishes primarily consist of acrylates, photoinitiators, and solvents. However, these varnishes exhibit poor adhesion to substrates, low hardness, a small droplet angle, and insufficient antibacterial properties. Therefore, improving UV varnishes' adhesion, hardness, droplet angle, and long-lasting antibacterial properties poses a challenge in existing technologies. Summary of the Invention

[0003] The present invention aims to provide an antibacterial UV varnish with an ultra-high water drop angle, a preparation method thereof, and applications thereof. The UV varnish provided by the present invention has high adhesion to the substrate, high hardness and water drop angle, and has excellent antibacterial properties and long-lasting antibacterial properties.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The invention provides an antibacterial UV varnish with an ultra-high water drop angle, which comprises, by mass percentage, 30-35% of decyl side-branched trifunctional polyurethane acrylate, 18-20% of tetrafunctional polyester acrylate, 5-10% of propoxylated glycerol triacrylate, 1-2% of trifunctional phosphate-modified acrylate, 5-12% of wax slurry, 3-4% of photoinitiator, 2-3% of antibacterial agent, 1-2% of auxiliary agent and the balance of organic solvent; the tetrafunctional polyester acrylate is HT7400 produced by Guangdong Haohui New Materials Co., Ltd.; the auxiliary agents include a defoamer and an antifouling agent.

[0006] Preferably, the grafting rate of decyl groups in the decyl side-branched trifunctional polyurethane acrylate is 24-26%.

[0007] Preferably, the photoinitiator includes 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0008] Preferably, the mass ratio of the 2,4,6-trimethylbenzoyl-diphenylphosphine oxide to phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide is (4-7):(3-6).

[0009] Preferably, the mass ratio of the defoaming agent to the antifouling agent in the auxiliary agent is 1:(1-3).

[0010] Preferably, the organic solvent includes ethyl acetate, butyl acetate and isobutanol.

[0011] Preferably, the mass ratio of ethyl acetate, butyl acetate and isobutanol is (6-7):(7-8):(7-8).

[0012] Preferably, the water drop angle of the antibacterial UV varnish with ultra-high water drop angle is ≥105°.

[0013] The present invention also provides a method for preparing the antibacterial UV varnish with an ultra-high water drop angle described in the above technical solution, comprising the following steps:

[0014] (1) mixing decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate, trifunctional phosphate-modified acrylate and wax slurry to obtain a mixture;

[0015] (2) The mixture obtained in step (1) is mixed with an antibacterial agent, an auxiliary agent, an organic solvent and a photoinitiator to obtain an antibacterial UV varnish with an ultra-high water drop angle.

[0016] The present invention also provides the use of the antibacterial UV varnish with ultra-high water drop angle described in the above technical solution or the antibacterial UV varnish with ultra-high water drop angle prepared by the preparation method described in the above technical solution in plastic and hardware products.

[0017] The invention provides an antibacterial UV varnish with an ultra-high water drop angle, which comprises, by mass percentage, 30-35% of decyl side-branched trifunctional polyurethane acrylate, 18-20% of tetrafunctional polyester acrylate, 5-10% of propoxylated glycerol triacrylate, 1-2% of trifunctional phosphate-modified acrylate, 5-12% of wax slurry, 3-4% of photoinitiator, 2-3% of antibacterial agent, 1-2% of auxiliary agent and the balance of organic solvent; the tetrafunctional polyester acrylate is HT7400 produced by Guangdong Haohui New Materials Co., Ltd.; the auxiliary agents include a defoamer and an antifouling agent. The present invention uses decyl side-branched trifunctional polyurethane acrylate and tetrafunctional polyester acrylate as the main resin, which can make the UV varnish have excellent adhesion to the substrate. The addition of trifunctional phosphate-modified acrylate further improves the adhesion between the UV varnish and the substrate, while also making the UV varnish have a higher hardness after curing. In addition, the decyl side branches have antibacterial activity against a variety of bacteria, and can improve the antibacterial performance of the UV varnish when combined with an antibacterial agent. The addition of wax slurry and antifouling agent increases the water drop angle of the UV varnish, prevents the loss of the antibacterial agent, and improves the antibacterial durability of the UV varnish. By controlling the composition of the UV varnish and the amount of each component, the adhesion level, hardness and water drop angle of the UV varnish to the substrate are improved, while the antibacterial performance and long-lasting antibacterial performance of the UV varnish are improved. The results of the examples show that the antibacterial UV varnish with an ultra-high water drop angle provided by the present invention has an adhesion level of 0 to the substrate, a hardness of 2H, a water drop angle of ≥105°, and excellent antibacterial and antifungal properties and durability. DETAILED DESCRIPTION

[0018] The invention provides an antibacterial UV varnish with an ultra-high water drop angle, which comprises, by mass percentage, 30-35% of decyl side-branched trifunctional polyurethane acrylate, 18-20% of tetrafunctional polyester acrylate, 5-10% of propoxylated glycerol triacrylate, 1-2% of trifunctional phosphate-modified acrylate, 5-12% of wax slurry, 3-4% of photoinitiator, 2-3% of antibacterial agent, 1-2% of auxiliary agent and the balance of organic solvent; the tetrafunctional polyester acrylate is HT7400 produced by Guangdong Haohui New Materials Co., Ltd.; the auxiliary agents include a defoamer and an antifouling agent.

[0019] The antibacterial UV varnish with an ultra-high water drop angle provided by the present invention comprises 30-35% by mass of a decyl side-branched trifunctional polyurethane acrylate. In one embodiment, the mass percentage of the decyl side-branched trifunctional polyurethane acrylate can be specifically 30%, 31%, 32%, 33%, 34%, or 35%.

[0020] In the present invention, the grafting rate of the decyl groups in the decyl side-branched trifunctional polyurethane acrylate is preferably 24 to 26%, more preferably 25%.

[0021] In the present invention, the viscosity (25°C) of the decyl side-branched trifunctional polyurethane acrylate is preferably 8000-12000 CPS; the chromaticity of the decyl side-branched trifunctional polyurethane acrylate is preferably ≤1; the decyl side-branched trifunctional polyurethane acrylate is preferably a clear and transparent viscous body. In the present invention, the decyl side-branched trifunctional polyurethane acrylate is used as the main resin and is used in combination with the tetrafunctional polyester acrylate to improve the adhesion and hardness between the UV varnish and the substrate, while improving the drying and curing speed of the UV varnish, so that the UV varnish reaches a surface energy of 800-1000 mJ / cm under the UV335-365 type UV lamp with an output power of 20-30W and a distance of 10-35 cm between the light source and the workpiece. 2 , and can be fully cured at a drawing rate of 10 m / min. The decyl side chains also possess high antibacterial activity against pathogenic bacteria such as Staphylococcus aureus and Escherichia coli. When combined with antimicrobial agents, they disrupt the ion transport nutrient pathways of bacteria or fungi, preventing them from entering their bodies, resulting in a broad-spectrum and excellent antibacterial effect. By controlling the amount and various parameters of the decyl side-branched trifunctional urethane acrylate within the aforementioned ranges, the present invention can further enhance the performance of UV varnishes.

[0022] As an embodiment, the raw materials for preparing the decyl side-branched trifunctional polyurethane acrylate include trimethylolpropane, decanoic acid, isophorone diisocyanate, hydroxyethyl acrylate, an acid catalyst and a dibutyltin dilaurate catalyst.

[0023] The present invention has no special limitation on the preparation method of the decyl side-branched trifunctional polyurethane acrylate. A preparation method well known to those skilled in the art can be used to ensure that the decyl grafting rate, viscosity, etc. are within the above ranges. As an embodiment, the preparation method of the decyl side-branched trifunctional polyurethane acrylate comprises: (1) esterifying trimethylolpropane and decanoic acid under acid catalysis to obtain a decyl polyol; (2) prepolymerizing the decyl polyol obtained in step (1) with isophorone diisocyanate and dibutyltin dilaurate as a catalyst to obtain a prepolymer; the ratio of the amount of -NCO in the isophorone diisocyanate to the amount of -OH in the decyl polyol is 2:1; (3) polymerizing the prepolymer obtained in step (2) with hydroxyethyl acrylate, the ratio of the amount of -NCO in the prepolymer to the amount of -OH in the hydroxyethyl acrylate is 1:1, to obtain the decyl side-branched trifunctional polyurethane acrylate. The present invention has no particular limitation on other operations in the preparation process, and any preparation method well known to those skilled in the art may be used.

[0024] The ultra-high drop angle antibacterial UV varnish provided by the present invention further comprises 18-20% by mass of tetrafunctional polyester acrylate. As an embodiment, the mass percentage of the tetrafunctional polyester acrylate can be specifically 18%, 18.5%, 19%, 19.5% or 20%.

[0025] In the present invention, the tetrafunctional polyester acrylate is HT7400 from Guangdong Haohui New Materials Co., Ltd. This invention utilizes this tetrafunctional polyester acrylate as the primary resin, in combination with a decyl-side-branched trifunctional polyurethane acrylate, to enhance the adhesion and hardness of UV varnishes to substrates, while also increasing the drying and curing speeds of the UV varnish. By controlling the amount and type of the tetrafunctional polyester acrylate within the aforementioned ranges, the present invention can further enhance the various properties of the UV varnish.

[0026] The antibacterial UV varnish with an ultra-high water drop angle provided by the present invention further comprises 5-10% propoxylated glyceryl triacrylate, wherein the propoxylated glyceryl triacrylate may be 5%, 6%, 7%, 8%, 9% or 10% by mass.

[0027] In the present invention, the propoxylated glycerol triacrylate is preferably EM2387 from Changxing Chemical Industry (Guangdong) Co., Ltd. By using this propoxylated glycerol triacrylate and controlling its dosage, the present invention can further improve the drying speed of the UV varnish, while also imparting improved flexibility and crosslinking density to the UV varnish, resulting in improved scratch resistance after curing. Furthermore, the propoxylated glycerol triacrylate has diluting properties, reducing the viscosity of the UV varnish, making it fully compatible with spraying conditions and more conducive to application.

[0028] The antibacterial UV varnish with an ultra-high water drop angle provided by the present invention further comprises, by mass percentage, 1-2% of a trifunctional phosphate-modified acrylate. In one embodiment, the mass percentage of the trifunctional phosphate-modified acrylate can be specifically 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.95%, or 2%.

[0029] In the present invention, the trifunctional phosphate-modified acrylate is preferably HC5351 from Guangdong Haohui New Materials Co., Ltd. By using this trifunctional phosphate-modified acrylate and controlling its dosage, the present invention can further improve the adhesion of the UV varnish to the substrate. Furthermore, its diluting properties can reduce the viscosity of the UV varnish, making it fully compatible with spraying conditions and more conducive to application.

[0030] The antibacterial UV varnish with an ultra-high drop angle provided by the present invention further comprises 5-12% wax slurry by weight. As an embodiment, the wax slurry may be specifically 5%, 6%, 7%, 8%, 9%, 10%, 11% or 12% by weight.

[0031] In the present invention, the wax slurry is preferably a spherical polyethylene wax slurry, more preferably a special wax slurry ZJ-22 from GIFU, Japan. By adding the wax slurry and controlling its dosage, the present invention increases the droplet angle of the UV varnish, prevents the loss of the antimicrobial agent, prolongs the antimicrobial time, and imparts long-lasting antimicrobial properties to the UV varnish.

[0032] The ultra-high drop angle antibacterial UV varnish provided by the present invention further comprises 3-4% by mass of a photoinitiator. In one embodiment, the mass percentage of the photoinitiator can be 3%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.95%, or 4%.

[0033] In the present invention, the photoinitiator preferably includes 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; the mass ratio of the 2,4,6-trimethylbenzoyl-diphenylphosphine oxide to the phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide is preferably (4-7):(3-6). As an embodiment, the mass ratio of the 2,4,6-trimethylbenzoyl-diphenylphosphine oxide to the phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide can be specifically 4.5:6, 4:4, or 5:3. The present invention utilizes two photoinitiators and controls their types and ratios, leveraging their synergistic effect to ensure a fast and efficient UV crosslinking process for the UV varnish, preventing it from drying out, making the UV varnish suitable for high-speed curing for spraying, and simultaneously preventing the UV varnish from yellowing, thereby improving its yellowing resistance.

[0034] The antibacterial UV varnish with an ultra-high drop angle provided by the present invention further comprises 2-3% by mass of an antibacterial agent. In one embodiment, the antibacterial agent may be present in an amount of 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.95%, or 3% by mass.

[0035] In the present invention, the antibacterial agent is preferably 5-chloro-2-(2,4-dichlorophenoxy)phenol. In the present invention, the antibacterial agent is preferably purchased from Foshan Liyuan Chemical Co., Ltd.

[0036] In the present invention, the antimicrobial agent is less likely to cause bacterial resistance and has a broader spectrum and more efficient bactericidal effect. The present invention uses the above antimicrobial agent and controls its dosage to further improve the antimicrobial property of UV varnish.

[0037] The antibacterial UV varnish with an ultra-high drop angle provided by the present invention further comprises 1-2% by mass of an additive. In one embodiment, the mass percentage of the additive can be specifically 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.95%, or 2%.

[0038] In the present invention, the auxiliary agents include defoaming agents and antifouling agents.

[0039] In the present invention, the mass ratio of the defoaming agent to the antifouling agent in the auxiliary agent is preferably 1:(1-3). As an embodiment, the mass ratio of the defoaming agent to the antifouling agent in the auxiliary agent can be specifically 1:1, 1:1.5, 1:2, 1:2.5 or 1:3.

[0040] In the present invention, the defoaming agent is preferably an organosilicon defoaming agent, more preferably BYK141 produced by BYK of Germany; the antifouling agent is preferably an organosilicon antifouling agent, more preferably 3007A produced by Guangdong Lankelu New Materials Co., Ltd.

[0041] The present invention adds defoamers and antifouling agents to improve the non-stick properties of UV varnish during spraying, prevent foaming during the preparation and use process, avoid the formation of holes after curing, and improve various properties of the cured UV varnish, such as the water drop angle. By controlling the type and amount of the additives within the above range, the present invention can further improve various properties of the UV varnish.

[0042] Calculated by mass percentage, the antibacterial UV varnish with ultra-high water drop angle provided by the present invention further includes a balance of organic solvent.

[0043] In the present invention, the organic solvent preferably includes ethyl acetate, butyl acetate, and isobutanol; the mass ratio of ethyl acetate, butyl acetate, and isobutanol is preferably (6-7):(7-8):(7-8). The present invention uses the above organic solvents and controls their dosage to achieve better dissolution and viscosity reduction effects.

[0044] The invention controls the composition of UV varnish and the amount of each component, improves the adhesion level, hardness and water drop angle of UV varnish to the substrate, improves the antibacterial performance and long-lasting antibacterial performance of UV varnish, has excellent antibacterial properties against various bacteria and molds (such as Aspergillus niger, Aspergillus flavus, Aspergillus versicolor, Aspergillus citrinum, Trichoderma viride, Chaetomium globosum, Cladosporium herbarium, and bacteria such as Staphylococcus aureus, Escherichia coli and Candida albicans), and simultaneously has excellent yellowing resistance, water resistance, alcohol resistance, scratch resistance and wear resistance.

[0045] The antibacterial UV varnish with an ultra-high water drop angle provided by the present invention has a water drop angle of ≥105°, an adhesion level of 0 to the substrate, a hardness of 2H, an antibacterial performance of 99%, an antibacterial durability of 95%, an antifungal performance of 0, and an antifungal durability of 0.

[0046] The present invention also provides a method for preparing the antibacterial UV varnish with an ultra-high water drop angle described in the above technical solution, comprising the following steps:

[0047] (1) mixing decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate, trifunctional phosphate-modified acrylate and wax slurry to obtain a mixture;

[0048] (2) The mixture obtained in step (1) is mixed with an antibacterial agent, an auxiliary agent, an organic solvent and a photoinitiator to obtain an antibacterial UV varnish with an ultra-high water drop angle.

[0049] The invention mixes decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate, trifunctional phosphate-modified acrylate and wax slurry to obtain a mixture.

[0050] In the present invention, the mixing of the decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate, trifunctional phosphate-modified acrylate and wax slurry is preferably as follows: the decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate and trifunctional phosphate-modified acrylate are stirred at 800-1000 rpm for 5-15 minutes, and then the wax slurry is added and stirred at 1600-1800 rpm for 30-50 minutes.

[0051] After obtaining the mixture, the present invention mixes the mixture with an antibacterial agent, an auxiliary agent, an organic solvent and a photoinitiator to obtain an antibacterial UV varnish with an ultra-high water drop angle.

[0052] In the present invention, the mixture is preferably mixed with the antibacterial agent, auxiliary agent, organic solvent and photoinitiator by adding the antibacterial agent, auxiliary agent and organic solvent to the mixture, stirring at 800-1000 rpm for 5-15 minutes, then adding the photoinitiator, and stirring at 800-1000 rpm for 5-15 minutes.

[0053] After the mixing is completed, the present invention preferably filters the mixed product to obtain an antibacterial UV varnish with an ultra-high water drop angle.

[0054] In the present invention, the mesh size of the filter during filtration is preferably 400 meshes.

[0055] By adopting the preparation method of the present invention, the components can be mixed more evenly.

[0056] The present invention also provides the use of the antibacterial UV varnish with ultra-high water drop angle described in the above technical solution or the antibacterial UV varnish with ultra-high water drop angle prepared by the preparation method described in the above technical solution in plastic and hardware products.

[0057] The antibacterial UV varnish with an ultra-high water drop angle provided by the present invention has excellent adhesion to the substrate, high hardness and water drop angle, excellent antibacterial performance and long-lasting antibacterial performance, as well as excellent yellowing resistance, water resistance, alcohol resistance, scratch resistance and wear resistance, and can meet the application requirements of coating in various plastic and hardware products.

[0058] In the present invention, the plastic products preferably include electronic products, automotive interior and exterior trims, cosmetic packaging, sports equipment, etc.

[0059] The present invention has no special limitation on the application operation, and the technical solution for the application of UV varnish well known to those skilled in the art can be adopted.

[0060] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] Example 1

[0062] An antibacterial UV varnish with an ultra-high water drop angle is composed of the following components, calculated by mass percentage: 30% of decyl side-branched trifunctional polyurethane acrylate (decyl grafting rate is 25%), 20% of tetrafunctional polyester acrylate (HT7400 from Guangdong Haohui New Materials Co., Ltd.), 10% of propoxylated glycerol triacrylate (EM2387 from Changxing Chemical Industry (Guangdong) Co., Ltd.), 1% of trifunctional phosphate modified acrylate (HC5351 from Guangdong Haohui New Materials Co., Ltd.), 10% of wax paste (special wax paste ZJ-22 from GIFU Co., Ltd. of Japan), and photocatalyst. 3.5% of hair growth agent (2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide in a mass ratio of 4.5:6), 3% of antibacterial agent (5-chloro-2-(2,4-dichlorophenoxy)phenol, Foshan Liyuan Chemical Co., Ltd.), 2% of auxiliary agent (organic silicon defoamer (BYK141 from BYK, Germany) and organosilicone antifouling agent (3007A from Guangdong Lankelu New Materials Co., Ltd.) in a mass ratio of 1:3), and the balance of organic solvent (ethyl acetate, butyl acetate and isobutyl alcohol in a mass ratio of 6:7:7);

[0063] The preparation method of the antibacterial UV varnish with an ultra-high water drop angle is as follows: (1) decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate and trifunctional phosphate modified acrylate are stirred at 1000 rpm for 10 minutes, and then wax slurry is added and stirred at 1600 rpm for 30 minutes to obtain a mixture;

[0064] (2) adding an antibacterial agent, an auxiliary agent and an organic solvent to the mixture obtained in step (1), stirring at 1000 rpm for 10 min, then adding a photoinitiator, stirring at 1000 rpm for 10 min, and filtering through a 400-mesh filter to obtain an antibacterial UV varnish with an ultra-high water drop angle.

[0065] Example 2

[0066] The invention discloses an antibacterial UV varnish with an ultra-high water drop angle, which is composed of the following components by mass percentage: 35% of decyl side-branched trifunctional polyurethane acrylate (decyl grafting rate is 25%), 18% of tetrafunctional polyester acrylate (HT7400 of Guangdong Haohui New Materials Co., Ltd.), 5% of propoxylated glycerol triacrylate (EM2387 of Changxing Chemical Industry (Guangdong) Co., Ltd.), 2% of trifunctional phosphate modified acrylate (HC5351 of Guangdong Haohui New Materials Co., Ltd.), 8% of wax paste (special wax paste ZJ-22 of GIFU Co., Ltd. of Japan), and photocatalyst. 4% of hair growth agent (2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide in a mass ratio of 4:4), 2.5% of antibacterial agent (5-chloro-2-(2,4-dichlorophenoxy)phenol, Foshan Liyuan Chemical Co., Ltd.), 2% of auxiliary agent (organic silicone defoamer (BYK141 from BYK, Germany) and organosilicone antifouling agent (3007A from Guangdong Lankelu New Materials Co., Ltd.) in a mass ratio of 1:1), and the balance of organic solvent (ethyl acetate, butyl acetate and isobutyl alcohol in a mass ratio of 6:7:7);

[0067] The preparation method of the antibacterial UV varnish with ultra-high water drop angle is the same as that in Example 1.

[0068] Example 3

[0069] An antibacterial UV varnish with an ultra-high water drop angle is composed of the following components by mass percentage: 34% of decyl side-branched trifunctional polyurethane acrylate (decyl grafting rate is 25%), 20% of tetrafunctional polyester acrylate (HT7400 from Guangdong Haohui New Materials Co., Ltd.), 8% of propoxylated glycerol triacrylate (EM2387 from Changxing Chemical Industry (Guangdong) Co., Ltd.), 1.5% of trifunctional phosphate modified acrylate (HC5351 from Guangdong Haohui New Materials Co., Ltd.), 5% of wax slurry (special wax slurry ZJ-22 from Japan GIFU Co., Ltd.), Photoinitiator (2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide in a mass ratio of 5:3) 4%, antibacterial agent (5-chloro-2-(2,4-dichlorophenoxy)phenol, Foshan Liyuan Chemical Co., Ltd.) 2%, auxiliary agent (organic silicone defoamer (BYK141 from BYK, Germany) and organosilicone antifouling agent (3007A from Guangdong Lankelu New Materials Co., Ltd.) in a mass ratio of 1:2) 2% and the balance organic solvent (ethyl acetate, butyl acetate and isobutyl alcohol in a mass ratio of 6:7:7);

[0070] The preparation method of the antibacterial UV varnish with ultra-high water drop angle is the same as that in Example 1.

[0071] Comparative Example 1

[0072] A UV varnish, calculated by mass percentage, is composed of the following components: 30% trifunctional polyurethane acrylate (HP6309 from Guangdong Haohui New Materials Co., Ltd.), 20% tetrafunctional polyester acrylate (HT7401 from Guangdong Haohui New Materials Co., Ltd.), 10% propoxylated glycerol triacrylate (EM2387 from Changxing Chemical Industry (Guangdong) Co., Ltd.), 1% monofunctional phosphate modified acrylate (HC5110 from Guangdong Haohui New Materials Co., Ltd.), 10% wax paste (special wax paste ZJ-22 from GIFU Co., Ltd. of Japan), and a photoinitiator ( 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (mass ratio of 4.5:6) 3.5%, antibacterial agent (5-chloro-2-(2,4-dichlorophenoxy)phenol, Foshan Liyuan Chemical Co., Ltd.) 3%, auxiliary agent (organic silicone defoamer (BYK141, BYK, Germany) and organosilicone antifouling agent (3007A, Guangdong Lankelu New Materials Co., Ltd.) (mass ratio of 1:3)) 2% and the balance organic solvent (ethyl acetate, butyl acetate and isobutanol (mass ratio of 6:7:7);

[0073] The preparation method of the UV varnish is the same as that of Example 1 except for the types of components.

[0074] Comparative Example 2

[0075] A UV varnish, calculated by mass percentage, is composed of the following components: 35% of decyl side-branched trifunctional polyurethane acrylate (decyl grafting rate is 25%), 18% of tetrafunctional polyester acrylate (HT7400 of Guangdong Haohui New Materials Co., Ltd.), 5% of propoxylated glycerol triacrylate (EM2387 of Changxing Chemical Industry (Guangdong) Co., Ltd.), 2% of trifunctional phosphate modified acrylate (HC5351 of Guangdong Haohui New Materials Co., Ltd.), 8% of wax paste (special wax paste ZJ-22 of Japan GIFU Co., Ltd.), and a photoinitiator ( 4% of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide in a mass ratio of 4:4, 1% of antibacterial agent (5-chloro-2-(2,4-dichlorophenoxy)phenol, Foshan Liyuan Chemical Co., Ltd.), 2% of auxiliary agent (organic silicone defoamer (BYK141, BYK, Germany) and organosilicone antifouling agent (3007A, Guangdong Lankelu New Materials Co., Ltd., in a mass ratio of 1:1), and the balance of organic solvent (ethyl acetate, butyl acetate and isobutanol in a mass ratio of 6:7:7);

[0076] The preparation method of the UV varnish is the same as that in Example 1.

[0077] Comparative Example 3

[0078] A UV varnish is composed of the following components, calculated by mass percentage: 34% of decyl side-branched trifunctional polyurethane acrylate (decyl grafting rate is 25%), 20% of tetrafunctional polyester acrylate (HT7400 from Guangdong Haohui New Materials Co., Ltd.), 8% of propoxylated glycerol triacrylate (EM2387 from Changxing Chemical Industry (Guangdong) Co., Ltd.), 1.5% of trifunctional phosphate-modified acrylate (HC5351 from Guangdong Haohui New Materials Co., Ltd.), 5% of wax paste (special wax paste ZJ-22 from GIFU Co., Ltd. of Japan), 4% of a photoinitiator (2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide in a mass ratio of 5:3), 0.5% of an auxiliary agent (organic silicone defoamer (BYK141 from BYK Co., Ltd. of Germany)), and the remainder of an organic solvent (ethyl acetate, butyl acetate, and isobutyl alcohol in a mass ratio of 6:7:7).

[0079] The preparation method of the UV varnish is the same as that of Example 1 except that no antibacterial agent and antifouling agent are added.

[0080] The UV varnish in each embodiment and comparative example is translucent milky white. The UV varnish in Examples 1 to 3 and Comparative Examples 1 to 3 is applied to the surface of a PC plastic substrate and UV-cured to obtain a coating. The thickness of the coating is 25 μm. The adhesion, hardness, gloss, water drop angle, yellowing resistance, water resistance, alcohol resistance, friction resistance, antibacterial performance, antibacterial durability, antifungal performance, and antifungal durability of each coating are tested. The fineness and solid content of the UV varnish in each embodiment and comparative example are also tested. The results are shown in Table 1.

[0081] The detection methods are:

[0082] Adhesion: According to GB9286-1988, the coating surface is tested by the hundred-grid method.

[0083] Fineness: Tested according to GB / T13217.3-2008;

[0084] Viscosity: tested with a rotational viscometer;

[0085] Gloss: Tested according to GB / T 13217.2-2009;

[0086] Water drop angle: tested according to GB T 30693-2014 Test method for water drop angle of paint and varnish;

[0087] Water resistance: Tested according to Method A of GB T 1733-1993, Determination of water resistance of paint film;

[0088] Alcohol resistance: 500g / cm 2 Force, 99.6wt% alcohol rub back and forth one time, the stroke is 2 to 3 cm;

[0089] Abrasion resistance: Use a paper tape tester to test the friction force of RCA175;

[0090] Solid content: tested according to GB / T 1725-2007;

[0091] Antibacterial performance, antibacterial durability, antifungal performance, antifungal durability: tested according to HG / T 3950-2007 "Antibacterial Coatings" standard.

[0092] Table 1 Fineness and solid content of UV varnish in Examples 1 to 3 and Comparative Examples 1 to 3, and properties of coatings after UV curing of UV varnish in Examples 1 to 3 and Comparative Examples 1 to 3

[0093]

[0094]

[0095] As can be seen from Table 1, the present invention controls the composition and dosage of the components in the UV varnish, so that the UV varnish has a high level of adhesion to the substrate, a high hardness and a high water drop angle, excellent antibacterial and antifungal properties and antibacterial and antifungal durability, and excellent yellowing resistance, water resistance, alcohol resistance, and friction resistance.

[0096] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An antibacterial UV varnish with an ultra-high water drop angle, comprising, by mass percentage, 30-35% of decyl side-branched trifunctional polyurethane acrylate, 18-20% of tetrafunctional polyester acrylate, 5-10% of propoxylated glycerol triacrylate, 1-2% of trifunctional phosphate-modified acrylate, 5-12% of wax slurry, 3-4% of photoinitiator, 2-3% of antibacterial agent, 1-2% of auxiliary agent, and the balance of organic solvent; the tetrafunctional polyester acrylate is HT7400 produced by Guangdong Haohui New Materials Co., Ltd.; the auxiliary agents include a defoamer and an antifouling agent.

2. The antibacterial UV varnish with ultra-high water drop angle according to claim 1, characterized in that: The grafting rate of decyl groups in the decyl side-branched trifunctional polyurethane acrylate is 24-26%.

3. The antibacterial UV varnish with ultra-high water drop angle according to claim 1, characterized in that: The photoinitiator includes 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

4. The antibacterial UV varnish with ultra-high water drop angle according to claim 3, characterized in that: The mass ratio of the 2,4,6-trimethylbenzoyl-diphenylphosphine oxide to phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide is (4-7):(3-6).

5. The antibacterial UV varnish with ultra-high water drop angle according to claim 1, characterized in that: The mass ratio of the defoaming agent to the antifouling agent in the auxiliary agent is 1:(1-3).

6. The antibacterial UV varnish with ultra-high water drop angle according to claim 1, characterized in that: The organic solvent includes ethyl acetate, butyl acetate and isobutanol.

7. The antibacterial UV varnish with ultra-high water drop angle according to claim 6, characterized in that: The mass ratio of ethyl acetate, butyl acetate and isobutanol is (6-7): (7-8): (7-8).

8. The antibacterial UV varnish with ultra-high water drop angle according to claim 1, characterized in that: The water drop angle of the antibacterial UV varnish with ultra-high water drop angle is ≥105°.

9. The method for preparing the antibacterial UV varnish with ultra-high water drop angle according to any one of claims 1 to 8, comprising the following steps: (1) mixing decyl side-branched trifunctional polyurethane acrylate, tetrafunctional polyester acrylate, propoxylated glycerol triacrylate, trifunctional phosphate-modified acrylate and wax slurry to obtain a mixture; (2) The mixture obtained in step (1) is mixed with an antibacterial agent, an auxiliary agent, an organic solvent and a photoinitiator to obtain an antibacterial UV varnish with an ultra-high water drop angle.

10. Use of the antibacterial UV varnish with an ultra-high water drop angle according to any one of claims 1 to 8 or the antibacterial UV varnish with an ultra-high water drop angle prepared by the preparation method according to claim 9 in plastic and hardware products.

Images