Self-extinguishing photocured resin, uv-matt coating and wearable nail sheet prepared therefrom

Abstract

The application discloses a self-extinguishing photo-cured resin, a UV matte coating and a wear nail sheet prepared by the UV matte coating, and belongs to the field of nail beautifying. The UV matte coating prepared by the self-extinguishing photo-cured resin can effectively improve the toughness and strength of the whole wear nail sheet after forming a coating on a plastic nail sheet in the wear nail sheet through a process, and can protect the wear nail sheet from being easily deformed during use, so that the wear nail sheet can be recycled, the coating has excellent matte effect, the whole wear nail sheet has gloss and simulation effect similar to human nails, and the exposed part has good hand feeling. In addition, the UV matte coating has high anchoring effect on the plastic nail sheet or the back adhesive after being cured, so that the mutual adhesion between the plastic nail sheet, the coating and the back adhesive is strong, and the degree of adhesion is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nail art, in particular to a self-dulling photocured resin, a UV matte coating and a wearable nail sheet prepared therefrom. BACKGROUND

[0002] With the acceleration of people's life pace, many nail art lovers have not enough time to go to nail salons for traditional nail art, so people make wearable nail sheets through plastic injection molding process, and then make various coatings and styles on the nail sheets, which are used to replace traditional nail art. Such wearable nail sheets not only have various styles, but also are very convenient to use. When people need to wear them, they only need to adhere the wearable nail sheets to the nails through the back glue, and when they take them off, they can directly peel them off from the nails.

[0003] However, the research on wearable nail sheets in the prior art still mainly stays in the primary stage. In order to meet the requirements of good toughness and moderate thickness of wearable nails in use, the hardness of the plastic nail sheets prepared by injection molding is generally not high, which makes the nail sheets deform easily during the peeling process, and thus cannot be reused. Therefore, manufacturers often sell the same style of wearable nail sheets in multiple forms, which not only causes waste, but also makes the purchase price of wearable nail sheets higher. In addition, the materials used in the plastic nail sheets prepared by injection molding are uneven, and the adhesion after being adhered to the back glue is also quite different, which cannot guarantee that the wearable nail sheets of different styles have good adhesion to the back glue.

[0004] On the other hand, the status of wearable nail sheets in the nail art industry is still inferior to that of traditional hand-made nail art, mainly because the wearable nail sheets do not have a background color tone, so after being combined with the back glue, the color tone of the back glue is mainly used as the basis. However, during the adhesion process, the back glue is difficult to completely connect with the plastic nail sheet, which makes the part of the plastic nail sheet without a background color appear cheap and plastic. If people further coat a layer of color coating on the surface of the plastic nail sheet, the simulation and texture of human nails cannot be achieved. SUMMARY

[0005] Based on the defects in the prior art, the present application aims to provide a specific self-dulling resin and a UV matte coating prepared therefrom. The coating can effectively improve the toughness and strength of the entire wearable nail after being coated on the plastic nail sheet in the wearable nail sheet to form a coating, which can protect the wearable nail sheet from deforming during use and facilitate recycling. In addition, the coating has excellent matte effect, so that the entire wearable nail sheet has a gloss and simulation effect similar to human nails, and the exposed part has a good hand feel. On the other hand, the UV matte coating has high anchoring effect on the plastic nail sheet or the back glue after curing, so that the mutual adhesion between the plastic nail sheet, the coating and the back glue is strong, and the adhesion degree is high.

[0006] To achieve the above object, the technical scheme adopted by the present application is:

[0007] A self-extinguishing photocuring resin, comprising the following components: modified TDI (toluene diisocyanate) isocyanurate, modified TDI monomer and free fumed silica; the modified TDI monomer comprises a mixture of monohydroxy acrylate grafted modified TDI and fumed silica grafted modified TDI.

[0008] Preferably, the modified TDI isocyanurate is a polymer formed by the monohydroxy acrylate grafted modified TDI monomer.

[0009] Preferably, the free fumed silica has a mass content of 0.6-1 wt% in the self-extinguishing photocuring resin.

[0010] Preferably, the fumed silica has a particle size of 5-10 nm.

[0011] Preferably, the fumed silica is a hydrophilic fumed silica.

[0012] More preferably, the hydrophilic fumed silica is at least one of Wacker DeGussa A380, Wacker AEROSIL 100, Wacker AEROSIL 200, Wacker AEROSIL 300, Wacker HDK N20, Cabot CAB-O-SIL M5. More preferably, it is at least one of Wacker DeGussa A380, Wacker AEROSIL 100 and Wacker HDK N20.

[0013] It should be noted that, due to the large difference in the original particle size of the samples prepared by different brands, in order to ensure that the particle size range of the hydrophilic fumed silica used meets the product requirements of the present application, the raw materials can be pretreated by detection, screening and other means by those skilled in the art.

[0014] Preferably, the self-extinguishing photocuring resin comprises the following raw materials by weight: TDI monomer and monohydroxy acrylate 53-99 parts, fumed silica 0.5-1.2 parts, antioxidant 0.1-1 part, catalyst 0.05-0.5 part, terminator 0.03-0.3 part and polymerization inhibitor 0.05-0.5 part; the molar ratio of the TDI monomer and monohydroxy acrylate is (0.5-0.7):1.

[0015] In the technical scheme of the present application, since about 2 mol of NCO groups are contained in each 1 mol of TDI monomer, 1 mol of NCO groups will be consumed in the reaction with 1 mol of monohydroxy acrylate, and when the molar ratio of TDI monomer to monohydroxy acrylate is (0.5-0.7):1, the remaining NCO groups are about 5-40%, which can continue to fully react with the hydroxyl groups in the fumed silica.

[0016] It should be noted that the weight parts of the TDI monomer and the monohydroxy acrylate are 53-99, i.e., the total weight parts of the two substances are 53-99, and the two substances can be weighed at different times during preparation.

[0017] In the preparation raw material of the self-mattifying photocuring resin, the monohydroxy acrylate and the TDI monomer can produce different degrees of shrinkage on the surface of the molecular chain during grafting reaction, thereby achieving the effects of reducing gloss, producing a matte effect and a simulation effect; the fumed silica needs to be partially grafted to the TDI monomer and partially free during preparation. In this state, since the fumed silica itself has a porous structure, it can produce good diffuse reflection effect after grafting, and also reduce the gloss of the overall coating, so as to ensure that the self-mattifying photocuring resin exhibits a suitable matte effect. Meanwhile, the free fumed silica can maintain the stability of the resin and has the effect of preventing sedimentation. Therefore, in order to enable the monohydroxy acrylate in the system to be completely reacted and also enable the excess TDI isocyanate groups (NCO groups) in the system to partially graft to the fumed silica, it is necessary to specifically control the addition amount of the fumed silica and the ratio of the TDI monomer to the monohydroxy acrylate, otherwise it may cause the product to be unable to obtain a matte effect close to human nails and a simulation touch, and also affect the product. The inventors found through experimental comparison of similar grafting substances that only the fumed silica has the expected matte effect and simulation touch, for example, although aluminum oxide can also be grafted to the resin system of the present application, it does not have a matte effect and a simulation touch.

[0018] Meanwhile, the inventor has found through experiments that, since the fumed silica is in two parts of grafted and free state in the self-extinguishing photocuring resin, if the particle size is too large, the specific surface area is relatively reduced, the diffuse reflection effect after grafting is poor, and the matt effect of the product is reduced; if the particle size of the fumed silica is too small, the thixotropic effect is enhanced during grafting with the TDI monomer, the viscosity increases to a higher degree, and the grafting reaction degree is low (the thixotropic effect is not the grafting reaction of the fumed silica, and the thixotropic effect is manifested as the instantaneous increase of the viscosity of the system resin), which also makes the performance of the product poor. Therefore, the fumed silica with a particle size of 5-10 nm is the most suitable. On the other hand, the fumed silica currently used in industry mainly includes hydrophilic fumed silica and hydrophobic fumed silica after modification, and the latter has a lower content of hydroxyl groups. When used in the preparation of the self-extinguishing photocuring resin, the free state is more, the grafting rate is low, and therefore the use effect of the hydrophilic fumed silica is better.

[0019] More preferably, the preparation raw material of the self-extinguishing photocuring resin further includes 0.1-20 parts of a diluent.

[0020] More preferably, the self-extinguishing photocuring resin includes the following preparation raw materials in parts by weight:

[0021] The TDI monomer, 80-90 parts of monohydroxy acrylate, 0.6-1 part of fumed silica, 0.2-0.6 part of antioxidant, 0.07-0.25 part of catalyst, 0.04-0.2 part of terminator, 0.07-0.3 part of polymerization inhibitor, and 5-10 parts of diluent.

[0022] More preferably, the TDI monomer is 2,4-toluene diisocyanate.

[0023] The TDI monomer mainly includes two isomers of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate in the industrial production process, and the content of 2,4-toluene diisocyanate in the TDI monomer is mainly 65%, 80%, and 100%. Based on different use scenarios, the content of the two isomers can be adjusted. In the production of the self-extinguishing photocuring resin, in order to ensure the controllability of the reaction and the suitable grafting degree of the fumed silica, pure 2,4-toluene diisocyanate is preferably used.

[0024] More preferably, the monohydroxy acrylate is at least one of 4-HBA (hydroxybutyl acrylate), HEA (hydroxyethyl acrylate), HEMA (hydroxyethyl methacrylate), HPA (hydroxypropyl acrylate), and HPMA (hydroxypropyl methacrylate). More preferably, it is at least one of 4-HBA, HEMA, and HPMA.

[0025] More preferably, the antioxidant is at least one of hindered phenolic antioxidant, phosphite antioxidant; the catalyst is at least one of 2,4,6-trisdimethylaminomethylphenol, tri-n-butylphosphine, triethylenediamine, N,N-dimethylbenzylamine; the terminator is at least one of benzoyl chloride, phosphoric acid, p-toluenesulfonic acid methyl ester; the polymerization inhibitor is at least one of p-hydroxyanisole, triphenylphosphine, hydroquinone; the diluent is at least one of dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, acryloyl morpholine, isobornyl acrylate.

[0026] Another object of the present application is to provide a preparation method of the self-dimmed photocuring resin, comprising the following steps:

[0027] (1) Under a protective gas atmosphere, mix TDI monomer, partial monohydroxy acrylate, antioxidant and diluent uniformly, detect the initial value of NCO content in the obtained mixture, and heat to 61-65°C for reaction; the molar ratio of the TDI monomer to the partial monohydroxy acrylate is 1:1

[0028] (2) When the NCO content in the obtained mixture reaches 80% of the initial value, add a catalyst and heat to 65-69°C for continued reaction;

[0029] (3) When the NCO content in the obtained mixture reaches 50% of the initial value, add a terminator and the remaining monohydroxy acrylate, mix uniformly, heat to 69-75°C for continued reaction;

[0030] (4) When the NCO content in the obtained mixture no longer changes, add fumed silica in batches, mix uniformly until a thixotropic effect is produced, and then heat to 80-86°C and keep warm;

[0031] (5) When the NCO content in the obtained mixture is less than 0.3% of the initial value, add a polymerization inhibitor and mix uniformly, to obtain the self-dimmed photocuring resin.

[0032] In the preparation process, due to the control of the NCO content and temperature, part of the monohydroxy acrylate end-capped TDI monomer forms a polymer, i.e. a modified TDI isocyanurate, and part of the TDI monomer is grafted with the monohydroxy acrylate to obtain a monohydroxy acrylate grafted TDI. Part of the fumed silica is grafted with TDI during the reaction, and part is free in the system. At the same time, it should be noted that the heating step in step (4) is immediately carried out when the thixotropic effect of the mixture begins to occur, and at the same time, the addition of fumed silica is carried out in batches to ensure that the thixotropic effect begins to occur after the predetermined amount is completely added. In addition, the batch addition of fumed silica ensures that the material can be partially free and partially grafted. If the fumed silica is added all at once, the thixotropic effect of the system appears instantaneously, the viscosity increases rapidly, which is not conducive to the grafting reaction, and even a lump phenomenon occurs, which cannot be effectively formed.

[0033] In the preparation process of the present application, the TDI monomer in step (1) needs to be excessive, so as to ensure that it can have a surplus to graft with fumed silica. In step (2), the critical point of adding the catalyst is when the NCO content reaches 80% of the initial value. The main reason is that the inventors have found that the reaction limit under the reaction conditions in step (1) is 20%. Therefore, after the reaction reaches this degree, heating and the introduction of a catalyst are needed to continue the reaction. When the NCO content of the mixture reaches 50% of the initial value, the monohydroxy acrylate is substantially completely reacted. At this time, a terminating agent is added to control the length of the grafting chain, and the remaining monohydroxy acrylate is grafted without increasing the length of the chain to make the overall stability of the product higher. After the fumed silica is added in batches, the reaction needs a higher temperature due to the reaction between the fumed silica and the TDI monomer. Therefore, the temperature is further increased for the reaction. When the TDI monomer and the fumed silica are grafted completely, and the NCO content is less than 0.3% of the initial value, the overall reaction reaches equilibrium.

[0034] In addition, since the grafting reactivity of TDI monomer with monohydroxy acrylate is high, it is generally set in a lower reaction temperature range, and if the temperature is too high, it is not conducive to the reaction, and the grafting reaction of TDI monomer with fumed silica is mainly the reaction of the hydroxyl group on the surface of fumed silica with the NCO group in TDI monomer, but the hydroxyl content of fumed silica is relatively low, so in order to enable fumed silica to be fully grafted, it is necessary to carry out the reaction at a higher temperature and inhibit the reverse of the reaction. If the reaction of TDI monomer with fumed silica is carried out first, and then the reaction of monohydroxy acrylate is carried out, the final product cannot realize effective double reaction according to the inventor's experimental verification, and since the thixotropic effect of fumed silica and TDI monomer and the existence of free fumed silica that is not grafted make it difficult for the whole system to continue to react, only under the preparation method process described in the present application can the reaction of monohydroxy acrylate and the partial grafting effect of fumed silica be realized at the same time. At the same time, the continuous reaction process design of first heating and then cooling the reaction system also does not conform to the conventional route of industry.

[0035] The preparation method of the self-matt photo-curing resin described in the present application is simple and controllable, has low requirements for equipment, and can realize industrialized scale production.

[0036] Another object of the present application is to provide a UV matte paint, which comprises the following preparation raw materials by weight:

[0037] The self-matt photo-curing resin described in the present application is 40-60 parts, polyurethane acrylate is 20-40 parts, and adhesion promoter is 2-10 parts.

[0038] Preferably, the preparation raw materials further comprise UV monomer 4-15 parts, photoinitiator 1-8 parts, and processing aid 0.2-2 parts.

[0039] The UV matte coating system has the special component composition of the self-extinction light curing resin, so that the whole has the matte effect similar to the human nail itself, and the component can have the synergistic reaction with the polyurethane acrylate, so that the whole coating has the suitable gloss and the physical performance (strength, toughness and scratch resistance), and the base formed by the two components can make the adhesion promoter rapidly penetrate into the superficial layer of the plastic nail piece after being introduced, form the anchoring effect, and adjust the viscosity of the whole coating with the UV monomer, so that the fitting effect of the coating and the back adhesive is enhanced. In addition, based on the combination of the self-extinction light curing resin and the polyurethane acrylate, the two can give the product a better hand feeling, so that when the plastic nail piece is designed in the common leakage form (that is, the size of the plastic nail piece is larger than that of the human nail, and part of the nail piece will leak out instead of being attached to the nail), the upper surface of the leaked nail piece is smooth, and the lower surface (that is, the side coated with the UV matte coating) has the particle frosted texture similar to the back of the human nail, the simulation degree is high, and people will not obviously feel the wearing feeling of the nail piece during use.

[0040] Meanwhile, due to the special properties and comprehensive reflection effect brought by the formula selection of the self-extinction resin, the UV matte coating has good stability, high yellowing resistance, can effectively realize long-term use, and the user does not need to frequently replace, so the use experience is significantly improved.

[0041] Preferably, the polyurethane acrylate is a polyurethane modified acrylic UV resin.

[0042] The polyurethane modified acrylic UV resin has higher hardness and toughness than other types of resins, has good stability, has excellent yellowing resistance, and is therefore more suitable for the UV coating of the wearable nail piece which has certain requirements for the recycling performance.

[0043] More preferably, the polyurethane modified acrylic UV resin is at least one of the UV resin of the type 7911 of Hengzhiguang, the UV resin of the type SD-7558 of Songda Chemical, the UV resin of the type 2553 of Baorun Chemical, and the UV resin of the type WD-4230 of Qinggang Chemical.

[0044] Preferably, the adhesion promoter is an acrylic adhesion promoter or a phosphate adhesion promoter.

[0045] The acrylic or phosphate adhesion promoter contains the acrylic group or the phosphate group, which can form a firm chemical bond with the surface of the polar base material, and the long-chain acrylic or phosphate structure can realize strong penetration ability, directly penetrating into the surface of the plastic nail piece, and finally forming a good anchoring structure.

[0046] More preferably, the adhesion promoter is an acrylic adhesion promoter.

[0047] Compared with phosphate adhesion promoters, the acrylic adhesion promoters have stronger polarity of acrylic groups and higher strength of chemical bonds, and have stronger penetration ability due to smaller molecular weight of acrylic acid.

[0048] Preferably, the UV monomer is at least one of IBOA (isobornyl acrylate), IBOMA (isobornyl methacrylate), HEMA (hydroxyethyl methacrylate), and ACMO (acryloyl morpholine).

[0049] Preferably, the processing aid is at least one of a leveling agent and a defoaming agent.

[0050] More preferably, the leveling agent is at least one of BYK 358N, BYK 381, and BNK-F4001.

[0051] More preferably, the defoaming agent is at least one of BYK 1799, DEGOL 920, and DF1181.

[0052] Preferably, in the raw materials for preparing the UV matte paint, the weight fraction of the self-matting photocuring resin is 45-55 parts, and the weight fraction of the polyurethane acrylate is 25-35 parts.

[0053] More preferably, the UV matte paint comprises the following raw materials by weight:

[0054] The self-matting photocuring resin is 45-55 parts, the polyurethane acrylate is 25-35 parts, the adhesion promoter is 5-7 parts, the UV monomer is 6-10 parts, the photoinitiator is 4-5 parts, the leveling agent is 0.3-0.4 parts, and the defoaming agent is 0.3-0.4 parts.

[0055] The performance of the UV matte paint after curing is related to the ratio of the raw materials, especially the ratio of the self-matting photocuring resin and the polyurethane acrylate, which directly affects the matte degree, bonding performance, deformation resistance, nail simulation effect, and yellowing resistance of the product, and the trends of changes of these effects are completely different with the change of the ratio of the two resins. In summary, the UV matte paint prepared from the raw materials in the above ratio has the best comprehensive performance.

[0056] Another purpose of the present application is to provide a preparation method of the UV matte paint, comprising the following steps:

[0057] (1) uniformly heat-mixing the self-matting photocuring resin and the polyurethane acrylate to obtain a mixture A;

[0058] (2) adding adhesion promoter, photoinitiator, UV monomer and processing aid into mixture A, mixing uniformly, and then filtering, the obtained filtrate is the UV matte coating.

[0059] Preferably, the temperature of heating in step (1) is 60-70℃.

[0060] Preferably, the mixing in step (2) is performed by stirring, the stirring rate is 1800-2200rpm, and the time is 25-35min.

[0061] Another purpose of the present application is to provide a wearable nail piece, comprising a plastic nail piece and a matte coating attached to the concave surface of the plastic nail piece; the matte coating is obtained by curing the UV matte coating according to the present application.

[0062] Another purpose of the present application is to provide a preparation method of the wearable nail piece, comprising the following steps:

[0063] (1) diluting the UV matte coating according to the present application, and then uniformly spraying the diluted UV matte coating on the concave surface of the plastic nail piece, and then heating and drying;

[0064] (2) placing the dried plastic nail piece under ultraviolet light until the curing reaction is complete, and then obtaining the wearable nail piece.

[0065] Preferably, the degree of dilution in step (1) is a sprayable degree.

[0066] The preparation process of the wearable nail piece is convenient, and the difficulty of operation is low whether it is pre-production or temporary preparation, after preparation, only need to paste the back glue on the surface of the UV matte coating, and then directly paste on the nail, and the convenience is high.

[0067] Preferably, the temperature of heating in step (1) is 40-60℃, and the time is 3-5min.

[0068] Preferably, the step (2) is performed by ultraviolet light, and the irradiation energy is 550-650MJ.

[0069] The present application has the beneficial effect that the present application provides a self-extinguishing light-cured resin and a UV matte coating prepared therefrom, which can effectively improve the toughness and strength of the entire wear-resistant nail after the coating is coated on the plastic nail sheet in the wear-resistant nail sheet to form a coating, protects the wear-resistant nail sheet from deformation during use, facilitates recycling, and at the same time, the coating has excellent matte effect, so that the entire wear-resistant nail has gloss and simulation effect similar to human nails, and the leaked part has good hand feeling; on the other hand, the UV matte coating has high anchoring effect on the plastic nail sheet or the back adhesive after curing, so that the mutual adhesion between the plastic nail sheet, the coating and the back adhesive is strong, and the fitting degree is high.

[0070] In the performance detection test, the UV matte coating of the present application has high hardness and good flexibility after being prepared into a wear-resistant nail sheet, the gloss is in the range of 1-3GU of human real nails, and the matte simulation visual effect is good; at the same time, the coating formed by the UV matte coating in the product has good adhesion and will not fall off due to external force when worn; the simulation wear-resistant nail has strong adhesion to the back adhesive and excellent anti-deformation property; in the touch method, the wear-resistant nail sheet of the present application also has good simulation feeling due to the UV matte coating, and the highest evaluation of the product in the touch evaluation can reach full marks; in addition, the product has good yellowing resistance. The UV matte coating of the present application and the wear-resistant nail sheet prepared therefrom have more excellent and comprehensive performance than the existing commercially available UV matte coating and wear-resistant nail sheet of the same type, and at the same time, the product of this type has a new simulation effect and use experience. BRIEF DESCRIPTION OF DRAWINGS

[0071] Figure 1 The present application is a comparison diagram of the wear-resistant nail sheet (right) and the ordinary commercially available plastic nail sheet (left). DETAILED DESCRIPTION

[0072] In order to better illustrate the purpose, technical scheme and advantages of the present application, the present application will be further described below in combination with specific examples and comparative examples, the purpose of which is to understand the content of the present application in detail, rather than to limit the present application. All other examples obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The experimental reagents, raw materials and instruments designed in the present application and comparative examples are common ordinary reagents, raw materials and instruments, unless otherwise specified.

[0073] It should be noted that the terms "comprising", "including", and "having" and any variations thereof in the present specification and claims shall not be construed as excluding any other elements or steps. For example, a process, method, system, product, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but can include additional steps or elements that are not expressly listed or inherent to such process, method, system, product, or apparatus. The terms such as "first", "second", and the like in the present specification and claims of the present application are used to distinguish one entity / operation / element from another entity / operation / element, and do not necessarily indicate any actual relationship or order between these entities / operations / elements.

[0074] In the present application, the UV matte paint comprises the following raw materials by weight:

[0075] The self-extinction photocuring resin is 40-60 parts, the polyurethane acrylate is 20-40 parts, the adhesion promoter is 2-10 parts, the UV monomer is 4-15 parts, the photoinitiator is 1-8 parts, and the processing aid is 0.2-2 parts.

[0076] Further, the UV matte paint comprises the following raw materials by weight:

[0077] The self-extinction photocuring resin is 45-55 parts, the polyurethane acrylate is 25-35 parts, the adhesion promoter is 5-7 parts, the UV monomer is 6-10 parts, the photoinitiator is 4-5 parts, the leveling agent is 0.3-0.4 parts, and the defoaming agent is 0.3-0.4 parts.

[0078] As a preferred embodiment of the present application, the self-extinction photocuring resin comprises the following raw materials by weight: TDI monomer and monohydroxy acrylate 53-99 parts, fumed silica 0.5-1.2 parts, antioxidant 0.1-1 part, catalyst 0.05-0.5 part, terminator 0.03-0.3 part, and polymerization inhibitor 0.05-0.5 part; the molar ratio of the TDI monomer and monohydroxy acrylate is (0.5-0.7):1. The raw materials further comprise 0-20 parts of diluent.

[0079] Further, the self-extinction photocuring resin is composed of the following raw materials by weight:

[0080] The TDI monomer and monohydroxy acrylate are 80-90 parts, the fumed silica is 0.6-1 part, the antioxidant is 0.2-0.6 part, the catalyst is 0.07-0.25 part, the terminator is 0.04-0.2 part, the polymerization inhibitor is 0.07-0.3 part, and the diluent is 5-10 parts.

[0081] As a preferred embodiment of the present application, the TDI monomer is 2,4-toluene diisocyanate.

[0082] As a preferred embodiment of the present application, the monohydroxy acrylate is at least one of 4-HBA, HEA, HEMA, HPA, and HPMA.

[0083] As a preferred embodiment of the present application, the fumed silica has a particle size of 5-10 nm, and is a hydrophilic fumed silica.

[0084] Further, the hydrophilic fumed silica is at least one of Wacker DeGussa A380, Wacker AEROSIL 100, Wacker AEROSIL 200, Wacker AEROSIL 300, Wacker HDK N20, and Cabot CAB-O-SIL M5.

[0085] As a preferred embodiment of the present application, the hydrophilic fumed silica is Wacker DeGussa A380, and the product has a particle size of 5-10 nm.

[0086] It should be noted that the hydrophilic fumed silica used in the embodiments of the present application is pretreated by detection, screening, and the like before preparation of the UV matte coating, to ensure that the particle size range of the raw material used meets the requirements, and thus the raw material used may include multiple batches (or a single batch), and the particle size difference between batches will not affect the technical effects of the embodiments of the present application, and the skilled person should know that this will not bring uncertainty to the technical effects of the products of the embodiments of the present application.

[0087] As a preferred embodiment of the present application, the method for preparing the self-matt photocuring resin comprises the following steps:

[0088] (1) Under a protective gas atmosphere, the TDI monomer, part of the monohydroxy acrylate, the antioxidant, and the diluent are mixed uniformly, the initial value of the NCO content in the obtained mixture is detected, and the mixture is heated to 61-65°C for reaction; the molar ratio of the TDI monomer to the monohydroxy acrylate is 1:1.

[0089] (2) When the NCO content in the obtained mixture reaches 80% of the initial value, a catalyst is added and heated to 65-69°C for continued reaction.

[0090] (3) When the NCO content in the obtained mixture reaches 50% of the initial value, a terminating agent and the remaining monohydroxy acrylate are added and mixed uniformly, and heated to 69-75°C for continued reaction.

[0091] (4) when the NCO content in the obtained mixture no longer changes, add fumed silica in batches and mix uniformly until a thixotropic effect is generated, and then heat to 80-86°C and keep the temperature;

[0092] (5) when the NCO content in the obtained mixture is less than 0.3% of the initial value, add a polymerization inhibitor and mix uniformly, and the self-quenching photocuring resin is obtained.

[0093] As a preferred embodiment of the present application, the polyurethane acrylate is a polyurethane modified acrylic UV resin.

[0094] Further, the polyurethane modified acrylic UV resin of the present application is at least one of UV resin of type 7911 of Hengzhiguang Chemical, UV resin of type SD-7558 of Songda Chemical, UV resin of type 2553 of Baorun Chemical, and UV resin of type WD-4230 of Qinggang Chemical.

[0095] As a preferred embodiment of the present application, the adhesion promoter of the present application is an acrylic adhesion promoter or a phosphate ester adhesion promoter.

[0096] As a preferred embodiment of the present application, the preparation method of the UV matte paint of the present application comprises the following steps:

[0097] (1) heat and mix the self-quenching photocuring resin and the polyurethane acrylate uniformly to obtain a mixture A;

[0098] (2) add the adhesion promoter, the photoinitiator, the UV monomer and the processing aid to the mixture A and mix uniformly, and the obtained filtrate after filtration is the UV matte paint.

[0099] As a preferred embodiment of the present application, the wearable nail piece of the present application comprises a coating prepared from the UV matte paint of the present application and a plastic nail piece.

[0100] Further, the preparation method of the wearable nail piece comprises the following steps:

[0101] (1) dilute the UV matte paint of the present application to a sprayable viscosity, and uniformly spray on the concave surface of the plastic nail piece, and then heat to volatilize and dry the paint;

[0102] (2) place the dried plastic nail piece under ultraviolet light, and wait until the curing reaction is complete, and the wearable nail piece is obtained.

[0103] Examples 1-7

[0104] An embodiment of the self-extinguishing photocuring resin and the UV matte paint according to the present application, raw materials for preparing the self-extinguishing photocuring resin are shown in Table 1, and raw materials for preparing the UV matte paint are shown in Table 2, wherein the preparation method of the self-extinguishing photocuring resin comprises the following steps:

[0105] (1) Under a nitrogen atmosphere, the TDI monomer, part of the monohydroxy acrylate, the antioxidant and the diluent are uniformly mixed, the initial value of the NCO content in the obtained mixture is detected, and the mixture is heated to a set value of 65 DEG C (the actual value is 61-65 DEG C) for reaction; the molar ratio of the TDI monomer to the monohydroxy acrylate is 1:1;

[0106] (2) When the NCO content in the obtained mixture reaches 80% of the initial value, the catalyst is added and the mixture is heated to 65-69 DEG C for continuous reaction;

[0107] (3) When the NCO content in the obtained mixture reaches 50% of the initial value, the terminator and the remaining monohydroxy acrylate are uniformly mixed and added, and the mixture is heated to 69-75 DEG C for continuous reaction;

[0108] (4) When the NCO content in the obtained mixture no longer changes, the fumed silica is slowly added in batches and uniformly mixed until a thixotropic effect is produced, and the mixture is heated to a set value of 80-86 DEG C for continuous reaction;

[0109] (5) When the NCO content in the obtained mixture is less than 0.3% of the initial value, the polymerization inhibitor is added and uniformly mixed, and the self-extinguishing photocuring resin is obtained.

[0110] The preparation method of the UV matte paint comprises the following steps:

[0111] (1) The self-extinguishing photocuring resin and the polyurethane acrylate are uniformly mixed at 60-70 DEG C to obtain a mixture A;

[0112] (2) The adhesion promoter, the photoinitiator, the UV monomer and the processing aid are added to the mixture A and stirred at a speed of 2000 rpm for 30 min until uniform, and the UV matte paint is obtained after filtration.

[0113] In the preparation of the self-extinguishing photocuring resin, the TDI monomer is 2,4-toluene diisocyanate produced by Covestro Polymer Co., Ltd.;

[0114] The monohydroxy acrylate is hydroxyethyl methacrylate (HEMA) produced by Suzhou Sensi Chemical Co., Ltd.;

[0115] The fumed silica is hydrophilic fumed silica Wacker DeGussa A380 produced by Wacker Chemie AG, Germany, with a particle size of 5-10 nm;

[0116] The antioxidant is commercially available 2,6-di-tert-butyl-4-methylphenol;

[0117] The catalyst is commercially available N,N-dimethylbenzylamine;

[0118] The terminator is commercially available benzoyl chloride;

[0119] The polymerization inhibitor is commercially available p-hydroxyanisole;

[0120] The diluent is commercially available 1,6-hexanediol diacrylate.

[0121] In the preparation raw materials of the UV matte paint, the polyurethane acrylate is a polyurethane modified acrylic UV resin SD-7558 type resin produced by Songda Chemical Industry;

[0122] The adhesion promoter is an acrylic adhesion promoter produced by Nancheng Santuo Chemical Industry;

[0123] The UV monomer is HEMA (hydroxyethyl methacrylate) produced by Suzhou Sun Chemical Industry Co., Ltd.;

[0124] The photoinitiator is photoinitiator 184 produced by Tianjin Jiuri Chemical Industry;

[0125] The leveling agent is BYK358N produced by BIK Chemical Industry;

[0126] The defoaming agent is Diago 920 produced by Wincrete Degussa Diago Company.

[0127] Example 8

[0128] The difference between this example and Example 1 is only that in the preparation raw materials of the self-mattifying photocuring resin, the TDI monomer is a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate, wherein the content of 2,4-toluene diisocyanate is 65%.

[0129] Example 9

[0130] The difference between this example and Example 1 is only that in the preparation raw materials of the self-mattifying photocuring resin, the particle size of the hydrophilic fumed silica is 15-20 nm.

[0131] Example 10

[0132] The difference between this example and Example 1 is only that in the preparation raw materials of the self-mattifying photocuring resin, the particle size of the hydrophilic fumed silica is 1-5 nm.

[0133] Example 11

[0134] The difference between this embodiment and embodiment 1 is only that the fumed silica in the raw material for preparing the self-matt photo-curing resin is hydrophobic fumed silica Wacker DeGussa 812S produced by Wacker-Chemie GmbH, Germany, with a particle size of 5-10 nm.

[0135] Example 12

[0136] The difference between this embodiment and embodiment 1 is only that the adhesion promoter is phosphate adhesion promoter produced by Kaiping Ziqi Chemical Industry.

[0137] Example 13

[0138] The difference between this embodiment and embodiment 1 is only that the raw material for preparing the self-matt photo-curing resin is 4-HBA (hydroxybutyl acrylate) produced by Guangdong Yuhe New Material, and the fumed silica is hydrophilic fumed silica HDK N20 produced by Wacker, with a particle size of 5-10 nm.

[0139] Example 14

[0140] The difference between this embodiment and embodiment 1 is only that the raw material for preparing the UV matte paint is polyurethane modified acrylic UV resin model 2553 produced by Baorun Chemical Industry, and the UV monomer is IBOA (isobornyl acrylate) produced by Guangzhou Zhongjian Chemical Industry.

[0141] Examples 15-16

[0142] The difference between this embodiment and embodiment 1 is only that the raw material for preparing the self-matt photo-curing resin is added in different proportions, as shown in Table 1.

[0143] Table 1

[0144] Raw materials (parts by weight) Examples 1 to 14 Example 15 Example 16 Comparative Example 1 TDI monomer and monohydroxy acrylate (molar ratio 0.6:1) 85 85 85 85 Fumed silica 0.8 0.3 2 0 Antioxidant 0.5 0.5 0.5 0.5 Catalyst 0.2 0.2 0.2 0.2 Terminator 0.1 0.1 0.1 0.1 Polymerization inhibitor 0.2 0.2 0.2 0.2 Diluent 15 15 15 15

[0145] Table 2

[0146]

[0147]

[0148] Comparative Example 1

[0149] A UV matte paint, the raw material and preparation method of which are the same as in embodiment 1, with the difference being only that the raw material for preparing the self-matt photo-curing resin is as shown in Table 1, wherein the preparation method of the self-matt photo-curing resin comprises the following steps:

[0150] (1) mixing the TDI monomer, part of the monohydroxy acrylate, antioxidant and diluent uniformly under nitrogen atmosphere, detecting the initial value of NCO content in the obtained mixture, and heating to 61-65°C for reaction; the molar ratio of the TDI monomer to the monohydroxy acrylate is 1:1

[0151] (2) when the NCO content in the obtained mixture reaches 80% of the initial value, adding a catalyst and heating to 65-69°C for continuous reaction;

[0152] (3) when the NCO content in the obtained mixture reaches 50% of the initial value, adding a terminating agent and the rest of the monohydroxy acrylate, mixing uniformly, and heating to 69-75°C for continuous reaction;

[0153] (4) when the NCO content in the obtained mixture no longer changes, heating to 80-86°C for continuous reaction;

[0154] (5) when the NCO content in the obtained mixture is less than 0.3% of the initial value, adding a polymerization inhibitor and mixing uniformly, thus obtaining the self-extinction photocuring resin.

[0155] Comparative Examples 2-4

[0156] The difference between this comparative example and Example 1 is only that the addition weight parts of the raw materials for preparation are different, as shown in Table 1.

[0157] Comparative Example 5

[0158] The difference between this comparative example and Example 1 is only that the self-extinction photocuring resin is replaced by the 0038F model resin produced by Guangdong Haohui New Material.

[0159] Comparative Example 6

[0160] The difference between this comparative example and Example 1 is only that the UV matte coating is replaced by Changrunhua UV coating CB-200.

[0161] Comparative Example 7

[0162] The difference between this comparative example and Example 1 is only that the fumed silica in step (4) is added all at once instead of in batches, at this time the mixture immediately appears thixotropic effect, the viscosity rapidly increases and it is difficult to stir, the phenomenon of caking appears, and it cannot be shaped, thus the reaction is no longer continued.

[0163] Effect Example 1

[0164] In order to verify the use performance of the UV matte coating according to the present application, the products of each example and comparative example are tested for properties, and at the same time, wearing pieces are prepared, the preparation method being:

[0165] (1) After diluting each UV matte paint to a sprayable viscosity, uniformly spray it on the concave surface of the plastic nail sheet, and then heat it to volatilize and dry the paint;

[0166] (2) Place the plastic nail sheet with the dried paint coating under a UV lamp to undergo a curing reaction, and the wearable nail sheet is obtained.

[0167] Subsequently, each wearable nail sheet is pasted with commercially available back adhesive on the paint surface and tested for performance.

[0168] The tests involved are as follows, and a blank group is set up, i.e., a blank plastic nail sheet without coating:

[0169] (1) Hardness test according to GB / T 531-1999 using a Shore hardness tester;

[0170] (2) Flexibility test according to GB / T 1731-2020 using a paint film flexibility tester;

[0171] (3) Gloss test according to GB / T 8807-1988 using a paint film gloss tester; since the gloss of the real nails of the present human body is generally in the range of 1-3 GU, the closer the gloss of the product to this range, the better the matte effect of the product, the more realistic it is, and the closer to the critical value or beyond the range, the worse the matte effect of the product;

[0172] (4) Solvent resistance test according to GB / T 23989-2009 using the cotton ball wetting test method;

[0173] (5) Adhesion test of the UV matte coating on the plastic nail sheet of the same material after coating, to test the adhesion effect of the UV matte paint on the plastic nail sheet. Under good lighting conditions, visually inspect the peeling of the coating on the test surface. The adhesion is divided into 6 levels, and the adhesion of the coating decreases from level 0 to level 5, with level 5 being the worst.

[0174] (6) Back adhesive and wearable nail sheet bonding force test according to GB / T 2792-1988 using a tensile testing machine;

[0175] (7) after the wearing nail sheet is pasted on the artificial nail with the back adhesive, a tensile testing machine is used to peel off the wearing nail sheet along the same force direction at a linear speed of 200 mm / min (the specific applied force is determined according to the lowest applied force by which the sample can be peeled off from the artificial nail), after peeling, a photography and deformation analysis software is used to observe and count the deformation degree of the wearing nail sheet, if the deformation amount is less than 5%, it is considered not to be deformed, if the deformation amount is greater than 5% but less than 10%, it is considered to be slightly deformed, if the deformation amount is greater than 10% but less than 20%, it is considered to be obviously deformed, and if the deformation amount is 20% or more, it is considered to be severely deformed; whether the wearing nail sheet has recyclability is verified through the test;

[0176] (8) 5 volunteers are used as a group for each test sample, the paint layer (paint film layer) of the wearing nail sheet is contacted by touch, and the similarity (i.e. simulation effect) of the touch feeling of the paint layer to the touch feeling of the human nail is evaluated by 1-5 points (the highest score is 5 points), the evaluation steps are as follows: the volunteers are blindfolded, the sample is cut to a suitable size, and an appropriate amount of real human nail is collected and cut to the same size, after the volunteers touch the real human nail for touch correction, the touch similarity test of the sample is performed, and the average value is taken for statistics; the score standard is as follows: 5 points: the touch feeling is completely the same as the human nail, and the sample and the human nail cannot be distinguished; 4 points: the touch feeling is almost the same as the human nail, but the difference between the sample and the human nail can be distinguished after multiple contacts; 3 points: the touch feeling is close to the human nail, and the sample and the human nail cannot be distinguished at first contact, but the difference between the sample and the human nail can be distinguished after second contact; 2 points: the touch feeling is quite different from the human nail, but better than the touch feeling of the existing ordinary nail sheet; 1 point: the touch feeling is the same as that of the existing ordinary nail sheet.

[0177] In addition, in order to verify the yellowing resistance of the UV matte paint, the UV matte paint samples prepared in each example and the comparative example are coated on standard white plastic plates at the same thickness, irradiated and cured for 3 h using an ultraviolet lamp tube type yellowing resistance tester, and then the discoloration degree of the samples is tested using a color difference meter, so as to determine the yellowing resistance of different samples under ultraviolet radiation, and the smaller the value, the better the yellowing resistance of the UV paint product.

[0178] The test results are shown in Tables 3 and 4.

[0179] Table 3

[0180]

[0181]

[0182] Table 4

[0183]

[0184] As can be seen from Table 3 and Table 4, the UV matte coatings and nail sheets prepared by the embodiments of the present application have excellent comprehensive performance, each nail sheet can have rigidity and toughness, and has the same performance as the existing nail sheet type products. In the gloss test and simulation effect test, due to the special effect of the self-extinguishing curing resin, the gloss of the product can be stably maintained in the range of 1-3 GU, as shown in Table 4, compared with the blank plastic nail sheet, the product has obvious matte effect, and the nail simulation visual effect is excellent; at the same time, the touch evaluation also reaches a high score, and the simulation score of each embodiment reaches more than 4 points, and the simulation touch effect is excellent. Figure 1

[0185] ​Meanwhile, in the bonding force test between the wearing nail sheet and the back glue, and between the UV matte coating and the plastic nail sheet, it can be seen that the UV matte coating prepared by the application has good anchoring effect, so that the adhesion after bonding with the plastic nail sheet is high, and when further prepared into a wearing nail sheet for use, the bonding strength is high. In the use process, it also has certain yellowing resistance effect, and the delta E of the yellowing resistance test of each embodiment product is not more than 5, so that the product has good stability during use, and does not need to be replaced frequently, thereby bringing better use experience to the user. In addition, in the wearing nail recyclability test, it is found that although whether the product will deform during peeling is related to the rigidity and toughness of the product itself, the product with higher rigidity and better toughness does not necessarily have good recyclability, and the deformation degree after peeling is low, for example, the comparative example 5 product which uses the existing commercial resin instead of the matt photocuring resin of the application has higher deformation degree than the embodiment 1 product, and obviously cannot have qualified recycling performance. In the products prepared by each embodiment of the application, the deformation degree is not higher than 10% during the peeling test. According to the performance comparison of the embodiment 1-5 products, it can be seen that the crosslinking reaction between the matt photocuring resin and the polyurethane acrylate in the UV matte coating of the application has a great influence on the performance of the product, and affects the hardness, flexibility, matte effect, bonding strength, anti-deformation, simulation effect and yellowing resistance effect of the product, and the influence trend of the product performance is completely different when the ratio of the two is different. When the weight of the matt photocuring resin is 45-55 parts and the weight of the polyurethane acrylate is 25-35 parts, the comprehensive performance of the product, especially the mechanical properties and simulation effect, is the best. If the ratio of the two resins is improper, or the conventional UV coating process is used for preparation, as shown in comparative examples 2-4, the obtained product cannot achieve the expected simulation effect, the gloss of the three products cannot reach the index range, and even the mechanical properties of the product can be significantly weakened, and the product does not have the qualification for recycling. On the other hand, the product of the application has good simulation effect, mainly because of the use of fumed silica in the matt photocuring resin. If the component is not used, the product cannot achieve good simulation effect in vision and touch, as shown in comparative example 1, and even the yellowing resistance performance of the product is weakened, and is even worse than the comparative example 5 which uses the existing commercially available resin of the same type. Meanwhile, the inventors found through experimental comparison of similar grafts that only fumed silica has the expected matte effect and simulation touch, for example, alumina can also be grafted into the resin system of the application, but does not have the matte effect and simulation touch.The amount of fumed silica used in the preparation of self-matting UV-curable resin also affects the product's performance. As shown in Examples 15 and 16, the amount of this component added should not be too little or too much; 0.5 to 1.2 parts is most suitable. Otherwise, it may not only result in insufficient matte finish but also affect the product's adhesion and simulation effect. A comparison between Example 8 and Example 1 shows that different TDI monomer compositions result in different product performances during the preparation of the self-matting UV-curable resin. Based on the selection of reaction efficiency and degree, pure 2,4-toluene diisocyanate is the best TDI monomer, achieving better simulation and yellowing resistance. As shown in Examples 9-11, the fumed silica in the photocurable self-matting resin exists in both grafted and free states, and their properties are not the same. When the particle size and hydrophilicity of the fumed silica raw material differ, the performance of the product prepared in Example 1 also differs. Compared to Example 1, the fumed silica raw material used in Example 9 has a larger particle size, and the gloss effect of the product almost exceeds the gloss range of real human fingernails, while the simulation effect when touched is also reduced. Example 10 uses a raw material with a smaller particle size, which does not affect the matte effect of the prepared product, but the adhesion and simulation effect are reduced. The product obtained in Example 11, which uses a hydrophobic fumed silica raw material, obviously has a worse matte effect and simulation effect than the product of Example 1. Therefore, when the particle size of the fumed silica used is 5-10 nm and it is hydrophilic silica, the overall effect, especially the simulation effect, of the product prepared in Example 1 is the best. Comparing the products of Example 12 and Example 1 reveals that when acrylic adhesive accelerators are used as the raw materials for product preparation, the effect is better than that of other types of adhesive accelerators.

[0186] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A UV matte coating, characterized in that, The preparation materials include the following parts by weight: 40-60 parts of self-matting UV-curable resin, 20-40 parts of polyurethane acrylate, and 2-10 parts of adhesion promoter; the self-matting UV-curable resin includes the following components: modified TDI isocyanurate, modified TDI monomer, and free fumed silica; the modified TDI monomer includes a mixture of monohydroxy acrylate-grafted modified TDI and fumed silica-grafted modified TDI; the modified TDI isocyanurate is formed from monohydroxy acrylate-grafted modified TDI. The self-maturing photocurable resin comprises the following raw materials in parts by weight: 53-99 parts of TDI monomer and monohydroxy acrylate, 0.5-1.2 parts of fumed silica, 0.05-0.5 parts of catalyst, 0.03-0.3 parts of terminator, and 0.05-0.5 parts of polymerization inhibitor; the molar ratio of TDI monomer to monohydroxy acrylate is (0.5-0.7):1; the fumed silica is hydrophilic fumed silica, and the particle size of the fumed silica is 5-10 nm; The preparation method of the self-matting light-curing resin includes the following steps: (1) Under a protective atmosphere, TDI monomer, a portion of monohydroxy acrylate, antioxidant and diluent are mixed evenly, the initial value of NCO content in the resulting mixture is detected, and the mixture is heated to 61~65℃ for reaction; the molar ratio of TDI monomer to a portion of monohydroxy acrylate is 1:

1. (2) When the NCO content in the resulting mixture reaches 80% of the initial value, add the catalyst and heat to 65~69℃ to continue the reaction; (3) When the NCO content in the obtained mixture reaches 50% of the initial value, add the terminator and the remaining monohydroxy acrylate, mix evenly, and heat to 69~75℃ to continue the reaction; (4) When the NCO content in the resulting mixture no longer changes, add fumed silica in batches and mix evenly until a thixotropic effect is produced. Then heat to 80~86℃ and keep warm. (5) When the NCO content in the obtained mixture is lower than 0.3% of the initial value, add the polymerization inhibitor and mix evenly to obtain the self-matting light-curing resin.

2. The UV matte coating as described in claim 1, characterized in that, The TDI monomer is 2,4-toluene diisocyanate.

3. The UV matte coating as described in claim 1, characterized in that, The monohydroxy acrylate is at least one of 4-HBA, HEA, HEMA, HPA, and HPMA.

4. The UV matte coating as described in claim 1, characterized in that, The self-maturing photocurable resin comprises the following raw materials in parts by weight: 80-90 parts of TDI monomer and monohydroxy acrylate, 0.6-1 part of fumed silica, 0.2-0.6 parts of antioxidant, 0.07-0.25 parts of catalyst, 0.04-0.2 parts of terminator, 0.07-0.3 parts of polymerization inhibitor, and 5-10 parts of diluent.

5. The UV matte coating as described in claim 4, characterized in that, Includes at least one of the following (a) to (c): (a) The antioxidant is at least one of hindered phenolic antioxidants and phosphite antioxidants; the catalyst is at least one of 2,4,6-tris(2,4,6)-dimethylaminomethylphenol, tri-n-butylphosphine, triethylenediamine, and N,N-dimethylbenzylamine. (b) The terminating agent is at least one of benzoyl chloride, phosphoric acid, and methyl p-toluenesulfonate; the polymerization inhibitor is at least one of p-hydroxyanisole, triphenylphosphine, and hydroquinone; (c) The diluent is at least one of tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, acrylmorpholine, and isobornyl acrylate.

6. The UV matte coating as described in claim 1, characterized in that, The self-matte UV-curing resin comprises 45-55 parts by weight, and the polyurethane acrylate comprises 25-35 parts by weight.

7. The UV matte coating as described in claim 1, characterized in that, The polyurethane acrylate is a polyurethane-modified acrylic UV resin.

8. The UV matte coating as described in claim 1, characterized in that, The adhesion promoter is an acrylic adhesion promoter or a phosphate ester adhesion promoter.

9. The UV matte coating according to any one of claims 1 to 8, characterized in that, The UV matte coating also includes the following raw materials in parts by weight: 4-15 parts of UV monomer, 1-8 parts of photoinitiator, and 0.2-2 parts of processing aid.

10. The UV matte coating as described in claim 9, characterized in that, The UV monomer is at least one of IBOA, IBOMA, HEMA, and ACMO.

11. The UV matte coating as described in claim 9, characterized in that, The processing aid is at least one of leveling agent and defoamer.

12. The UV matte coating as described in claim 11, characterized in that, The UV matte coating is made from the following raw materials in parts by weight: 45-55 parts of self-matting UV-curing resin, 25-35 parts of polyurethane acrylate, 5-7 parts of adhesion promoter, 6-10 parts of UV monomer, 4-5 parts of photoinitiator, 0.3-0.4 parts of leveling agent, and 0.3-0.4 parts of defoamer.

13. The method for preparing the UV matte coating according to any one of claims 1 to 12, characterized in that, Includes the following steps: (1) Heat and mix the self-matte light-curing resin and polyurethane acrylate evenly to obtain mixture A; (2) Add adhesion promoter, photoinitiator, UV monomer and processing aid to mixture A, mix evenly, and filter. The resulting filtrate is the UV matte coating.

14. The method for preparing the UV matte coating as described in claim 13, characterized in that, The heating temperature in step (1) is 60~70℃; the mixing in step (2) is carried out by stirring, the stirring speed is 1800~2200rpm, and the time is 25~35min.

15. A wearable armor plate, characterized in that, It includes a plastic nail plate and a matte coating attached to the concave surface of the plastic nail plate; the matte coating is obtained by curing the UV matte coating according to any one of claims 1 to 12.

16. The method for preparing wearable armor plates as described in claim 15, characterized in that, Includes the following steps: (1) The UV matte coating described in any one of claims 1 to 12 is diluted and then uniformly sprayed onto the concave surface of the plastic nail plate, followed by heating and drying; (2) Place the dried plastic nail plate under ultraviolet light until the curing reaction is complete, and the wearable nail plate is obtained.

17. The method for preparing wearable armor plates as described in claim 16, characterized in that, In step (1), the heating temperature is 40~60℃ and the time is 3~5min; in step (2), ultraviolet lamps are used for irradiation, and the irradiation energy is 550~650MJ.

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