Self-repairing UV (ultraviolet) excimer skin-touch coating as well as preparation method and application thereof

Abstract

The embodiment of the invention provides a self-repairing UV (Ultraviolet) excimer skin-touch coating as well as a preparation method and application thereof. The self-repairing UV excimer skin-touch coating comprises 50-60 parts of bio-based aliphatic polyurethane acrylate; 25 to 36 parts of a UV reactive diluent; 5 to 8 parts of a maleimide derivative; 0.1 to 0.3 part of a polymerization inhibitor; 1-3 parts of organic silicon micro powder; 3.5 to 6 parts of a photoinitiator; 0.2 to 0.3 part of a defoaming agent; 0.2 to 0.5 part of a leveling agent; wherein the content of bio-based carbon in the bio-based aliphatic polyurethane acrylate is 72%-75%. According to the self-repairing UV quasi-molecular skin-touch coating and the preparation method and application thereof provided by the embodiment of the invention, reversible covalent crosslinking is realized through DA reaction of the maleimide derivative and the 2, 5-furandimethanol grafted to the bio-based aliphatic polyurethane acrylate, so that the coating is endowed with self-repairing capability within the range of 60-100 DEG C, and the self-repairing UV quasi-molecular skin-touch coating has the advantages that the self-repairing UV quasi-molecular skin-touch coating has a good skin-touch effect; and the organic silicon micro powder is compounded with the components, so that the scratch resistance and the skin feeling effect of a coating film are improved.

Description

Technical Field

[0001] The present application belongs to the field of coating technology, and in particular relates to a self-repairing UV excimer skin-feel coating and a preparation method and application thereof. Background Art

[0002] As consumer attitudes shift, the home furnishing industry is experiencing a surge in "high-end customization," with high-end custom home furnishings becoming synonymous with elegance, fashion, and creativity. Skin-feel coatings, with their high-end positioning, excellent tactile quality, rich color options, and wide applicability, have become the preferred material for high-end custom furniture. Skin-feel coatings are currently categorized into three main categories: PU skin-feel products, water-based skin-feel products, and UV excimer skin-feel products. UV excimer skin-feel coatings, particularly UV254 excimer skin-feel coatings, are increasingly popular with customers due to their high production efficiency, energy savings, excellent scratch resistance, small footprint, and low cost.

[0003] However, the raw materials used in current UV excimer skin-feel coatings are all synthesized from petroleum cracking materials, and their raw materials are non-renewable. Moreover, in daily use, the coating film formed by the skin-feel coating is permanently damaged after being scratched by nails or other sharp objects, and the flexibility line is insufficient, making it difficult to meet the construction requirements of the mechanical folding process. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide a self-repairing UV excimer skin-feel coating and a preparation method and application thereof, so as to solve the technical problem that the existing UV skin-feel coating is easily permanently damaged after application.

[0005] In a first aspect, the embodiments of the present application provide a self-repairing UV excimer skin-feel coating, comprising the following components in parts by weight:

[0006] 50-60 parts of bio-based aliphatic polyurethane acrylate; 25-36 parts of UV-active diluent; 5-8 parts of maleimide derivative; 1-3 parts of organosilicon micropowder; 0.1-0.3 parts of polymerization inhibitor; 3.5-6 parts of photoinitiator; 0.2-0.3 parts of defoaming agent; 0.2-0.5 parts of leveling agent; wherein the bio-based carbon content in the bio-based aliphatic polyurethane acrylate is 72%-75%.

[0007] In a second aspect, the present invention provides a method for preparing a self-repairing UV excimer skin-feel coating, comprising the following steps:

[0008] preparing a bio-based aliphatic polyurethane acrylate, wherein the bio-based carbon content of the bio-based aliphatic polyurethane acrylate is 72% to 75%;

[0009] Obtain the following raw materials in parts by weight:

[0010] 50-60 parts of the bio-based aliphatic polyurethane acrylate, 25-36 parts of UV active diluent, 5-8 parts of maleimide derivative, 0.1-0.3 parts of polymerization inhibitor, 1-3 parts of organosilicon powder, 3.5-6 parts of photoinitiator, 0.2-0.3 parts of defoamer, and 0.2-0.5 parts of leveling agent;

[0011] The above raw materials are mixed to obtain the self-repairing UV excimer skin-feel coating.

[0012] In some embodiments, the preparation of bio-based aliphatic polyurethane acrylate comprises the following steps:

[0013] Hexamethylene diisocyanate, 2,5-furan dimethanol, polyether glycol, an organic bismuth catalyst, and 2,6-di-tert-butyl-p-cresol are mixed and subjected to a first reaction to obtain a first product;

[0014] Hydroxyethyl acrylate, pentaerythritol triacrylate, an organic bismuth catalyst, p-hydroxyanisole, 2,6-di-tert-butyl-p-cresol and the first product are mixed and then subjected to a second reaction to obtain the bio-based aliphatic polyurethane acrylate.

[0015] In some embodiments, the reaction conditions of the first reaction include: reacting at a temperature of 60° C. to 65° C. for 3 to 4 hours.

[0016] In some embodiments, the second reaction includes: mixing the first product, an organic bismuth catalyst, p-hydroxyanisole and 2,6-di-tert-butyl-p-cresol, heating the mixture to 40°C to 45°C, adding hydroxyethyl acrylate and pentaerythritol triacrylate dropwise within 1 to 2 hours, and reacting at a temperature of 72°C to 78°C for 2 to 4 hours.

[0017] In some embodiments, the polyether glycol is polytrimethylene ether glycol ECOPROL H2000 produced by SK Chemicals of South Korea, and its bio-based carbon content is 100%.

[0018] In some embodiments, the molar ratio of 2,5-furan dimethanol, polyether glycol, and hexamethylene diisocyanate is (0.1-0.15):(0.85-0.9):(2.05-2.1).

[0019] In some embodiments, the molar ratio of the hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is (0.4-0.6):(0.4-0.6):1.

[0020] In some embodiments, in the reaction system at the initial stage of the first reaction:

[0021] The mass percentage of the organic bismuth catalyst is 0.05% to 0.2%;

[0022] The mass percentage of the 2,6-di-tert-butyl-p-cresol is 0.05% to 0.2%;

[0023] In some embodiments, in the reaction system of the second reaction initial stage:

[0024] The mass percentage of the organic bismuth catalyst is 0.05% to 0.2%;

[0025] The mass percentage of the p-hydroxyanisole is 0.1% to 0.5%;

[0026] The mass percentage of the 2,6-di-tert-butyl-p-cresol is 0.05% to 0.5%.

[0027] In some embodiments, the maleimide derivative includes at least one of N-phenylmaleimide and N-hydroxymaleimide.

[0028] In some embodiments, the spherical organosilicon powder includes at least one of Hangyu Technology HY-7000 and Gaohong Technology GW500NE-T.

[0029] In some embodiments, the UV active diluent includes acryloylmorpholine and tripropylene glycol diacrylate, wherein the mass percentage of acryloylmorpholine is not less than 10%.

[0030] In some embodiments, the photoinitiator includes methyl benzoylformate and at least one of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate, wherein the mass percentage of methyl benzoylformate is between 3% and 5%, and the sum of the mass percentages of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate is between 0.5% and 1%.

[0031] In some embodiments, the defoaming agent is selected from at least one of Evonik Specialty Chemicals TEGO920 and BYK Chemicals BYK1791.

[0032] In some embodiments, the leveling agent is selected from at least one of Evonik Specialty Chemicals TEGO Rad 2500 and BYK-UV3500.

[0033] In the third aspect, an embodiment of the present application provides a self-repairing UV excimer skin-feel coating, which adopts the self-repairing UV excimer skin-feel coating described in the first aspect or the second aspect, and is constructed by a forward and reverse roller coating machine and then pre-cured with an LED lamp, cured with a 254nm excimer lamp, and cured with a mercury lamp.

[0034] In some embodiments, the self-repairing UV254 excimer skin-feel coating has a gloss between 2% and 5%.

[0035] In some embodiments, the self-repairing UV excimer skin-feel coating has a scratch repair rate of not less than 90% under the conditions of 60° C. to 100° C. for 20 minutes.

[0036] In some embodiments, the self-repairing UV excimer skin-feel coating has a yellowing degree ΔE ≤ 3.0 under preset test conditions.

[0037] The self-healing UV excimer skin-feel coating provided in the embodiments of this application, as well as its preparation method and application, improves the various performance properties of the coating in application through the compounding of various components. The reversible covalent crosslinking is achieved through the DA reaction between a maleimide derivative and 2,5-furan dimethanol grafted to a bio-based aliphatic polyurethane acrylate, imparting the coating with self-healing capabilities within the range of 60°C to 100°C. Furthermore, the compounding of organosilicon micropowder with the components improves the scratch resistance and skin-feel of the coating film.

[0038] The self-repairing UV excimer skin-feel coating provided in the embodiments of the present application, as well as its preparation method and application, is coated through the joint action of the various components and forward and reverse roller coating equipment, and an ultra-matte coating with a skin-feel is obtained under the irradiation of LED lamps, 254nm excimer lamps and UV lamps. The biobased content of this coating is between 37 and 46%, the medium temperature (60-100°C, 20min) repair rate is greater than 90%, the gloss is between 2% and 5%, the flexibility passes the 1mm shaft test, and the coating does not crack when mechanically folded, and it has excellent water resistance, acid resistance, alkali resistance, alcohol resistance, dry heat resistance, wet heat resistance and yellowing resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 It is a schematic flow chart of the preparation method of the self-repairing UV excimer skin-feel coating provided in the embodiment of the present application. DETAILED DESCRIPTION

[0041] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the embodiments of the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the embodiments of the present application.

[0042] It should also be understood that the term "and / or" used in the description of the embodiments of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0043] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In addition, in the description of the embodiments of the present application and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0046] References to "some embodiments" or "some embodiments" described in the specification of the embodiments of the present application mean that one or more embodiments of the embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" refers to two or more.

[0047] In a first aspect, an embodiment of the present application provides a self-repairing UV excimer skin-feel coating, comprising the following components in parts by weight:

[0048] 50-60 parts of bio-based aliphatic polyurethane acrylate; 25-36 parts of UV active diluent; 5-8 parts of maleimide derivative; 1-3 parts of organosilicon micropowder; 0.1-0.3 parts of polymerization inhibitor; 3.5-6 parts of photoinitiator; 0.2-0.3 parts of defoaming agent; 0.2-0.5 parts of leveling agent; wherein the bio-based carbon content in the bio-based aliphatic polyurethane acrylate is 72%-75%.

[0049] The self-healing UV excimer skin-feel coating provided in the present application improves various coating performance properties through the compounding of various components. The reversible covalent crosslinking is achieved through the DA reaction between a maleimide derivative and 2,5-furan dimethanol grafted onto a bio-based aliphatic polyurethane acrylate, imparting the coating with self-healing capabilities within the temperature range of 60°C to 100°C. Furthermore, the compounding of organic silicon micropowder with the other components enhances the coating's scratch resistance and skin-feeling properties.

[0050] In application, bio-based aliphatic polyurethane acrylates serve as the coating's backbone, providing the film with mechanical strength, flexibility, and weather resistance. The aliphatic structure imparts excellent yellowing resistance to the coating, making it suitable for high-gloss or matte finishes. The bio-based carbon content of bio-based aliphatic polyurethane acrylates is 72% to 75%, meeting international bio-based material standards and enhancing the product's green label competitiveness. Excessively high bio-based carbon content can also reduce molecular chain regularity, leading to a decrease in hardness. The 72% to 75% setting strikes a balance between environmental friendliness and mechanical performance, ensuring the coating is both flexible and impact-resistant. Raw material sourcing is optimized: renewable resources (such as castor oil and soybean oil derivatives) are used instead of petrochemical raw materials, ensuring the renewability of the raw materials.

[0051] In application, UV active diluents are used to adjust viscosity and participate in curing. For example, low viscosity monomers can reduce the viscosity of the system, making it easier to spray. At the same time, they participate in UV curing cross-linking through double bonds, affecting the hardness and shrinkage of the coating.

[0052] In application, maleimide derivatives dynamically bond with furan groups via a Diels-Alder reaction. Heating to 60-100°C breaks the DA bonds, which recrosslink upon cooling, repairing microcracks. A dosage of 5-8 parts ensures sufficient dynamic bond density to support self-healing efficiency, while avoiding excessive amounts that could reduce film rigidity or hinder curing. Silicone micropowder reduces the surface friction coefficient of the coating, minimizing scratches.

[0053] In application, polymerization inhibitors inhibit the self-polymerization of prepolymers and diluents during storage, extending the shelf life of the coating. Excessive amounts will delay curing, while insufficient amounts will easily cause gelation. In addition, surface modification (such as silane coupling agent treatment) can be used to improve compatibility with the resin matrix and avoid uneven gloss caused by agglomeration. Photoinitiators should be selected that match the 254nm excimer light source (such as TPO, 819) to ensure deep curing (film thickness 10 to 30μm) and rapid reaction. Defoamers, such as polyether-modified silicone defoamers, inhibit the generation of bubbles during spraying or stirring, avoiding pinhole defects in the coating. Leveling agents can improve surface flatness. Fluorocarbon-modified acrylate leveling agents reduce surface tension, promote coating leveling, and obtain a uniform matte effect.

[0054] The present application also provides a method for preparing a self-repairing UV excimer skin-feel coating. Figure 1 As shown, the following steps are included:

[0055] S10, preparing a bio-based aliphatic polyurethane acrylate, wherein the bio-based carbon content of the bio-based aliphatic polyurethane acrylate is 72% to 75%;

[0056] S20, obtain the following raw materials in parts by weight:

[0057] 50-60 parts of the bio-based aliphatic polyurethane acrylate, 25-36 parts of UV active diluent, 5-8 parts of maleimide derivative, 0.1-0.3 parts of polymerization inhibitor, 1-3 parts of organosilicon powder, 3.5-6 parts of photoinitiator, 0.2-0.3 parts of defoamer, and 0.2-0.5 parts of leveling agent;

[0058] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0059] In some embodiments, in step S10 above, the preparation of bio-based aliphatic polyurethane acrylate comprises the following steps:

[0060] S11. Hexamethylene diisocyanate, 2,5-furan dimethanol, polyether glycol, an organic bismuth catalyst, and 2,6-di-tert-butyl-p-cresol are mixed and subjected to a first reaction to obtain a first product. Under the action of the organic bismuth catalyst, the isocyanate group of the hexamethylene diisocyanate reacts with the hydroxyl groups of the 2,5-furan dimethanol and the polyether glycol to produce the first product. The 2,6-di-tert-butyl-p-cresol acts as an antioxidant to reduce the amount of by-products and increase the yield of the target product.

[0061] S12. Mixing hydroxyethyl acrylate, pentaerythritol triacrylate, an organic bismuth catalyst, p-hydroxyanisole, 2,6-di-tert-butyl-p-cresol, and the first product, and then subjecting the mixture to a second reaction to obtain the bio-based aliphatic polyurethane acrylate. Under the action of the organic bismuth catalyst, the hydroxyl groups of hydroxyethyl acrylate and pentaerythritol triacrylate react with the isocyanate groups of the first reaction product to generate the bio-based aliphatic polyurethane acrylate. p-hydroxyanisole serves as a polymerization inhibitor, and 2,6-di-tert-butyl-p-cresol serves as an antioxidant to reduce the amount of byproducts and increase the yield of the target product.

[0062] In the above step S11, in some embodiments, the reaction conditions of the first reaction include: reacting at a temperature of 60°C to 65°C for 3 to 4 hours; under such reaction conditions, the organic bismuth catalyst is conducive to catalyzing the reaction of the isocyanate group of hexamethylene diisocyanate with the hydroxyl group of 2,5-furan dimethanol and polyether glycol to produce the first product. Exemplarily, the temperature conditions of the first reaction can be any typical but non-limiting point value such as 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, or an interval between any two typical but non-limiting point values, and the reaction time can be any typical but non-limiting point value such as 3 hours, 3.5 hours, 4 hours, or an interval between any two typical but non-limiting point values.

[0063] In some embodiments, the polyether glycol is SK Chemical's polytrimethylene ether glycol ECOPROL H2000, a plant-based renewable biomass. Bio-based materials are introduced into the resin through a synthetic reaction, replacing traditional non-renewable resource components such as petroleum and coal. This increases the bio-based content of the UV resin, making the bio-based aliphatic polyurethane acrylate more environmentally friendly. In some embodiments, the molar ratio of 2,5-furan dimethanol, polyether glycol, and hexamethylene diisocyanate is (0.1-0.15):(0.85-0.9):(2.05-2.1); specifically, the molar ratio can be any typical but non-limiting value, such as 0.1:0.85:2.05, 0.15:0.9:2.1, or any range between any two typical but non-limiting values. This ratio ensures that the isocyanate groups of the alicyclic hexamethylene diisocyanate fully react with the hydroxyl groups of 2,5-furan dimethanol and polyether glycol, reducing byproduct formation and increasing the yield of the target product.

[0064] In some embodiments, in the reaction system at the initial stage of the first reaction, the weight percentages of the organobismuth catalyst and 2,6-di-tert-butyl-p-cresol are 0.05% to 0.2% and 0.05% to 0.2%, respectively. At this ratio, the organobismuth catalyst can ensure that it catalyzes the reaction between the isocyanate groups of alicyclic hexamethylene diisocyanate and the hydroxyl groups of 2,5-furan dimethanol and polyether glycol, providing a sufficient antioxidant effect on 2,6-di-tert-butyl-p-cresol, reducing the amount of by-products generated, and increasing the yield of the target product. Illustratively, in the reaction system in the initial stage of the first reaction, the mass percentage content of 2,6-di-tert-butyl-p-cresol can be any typical but non-limiting point value such as 0.05%, 0.1%, 0.15%, 0.2%, or an interval value between any two typical but non-limiting point values; the mass percentage content of the organic bismuth catalyst can be any typical but non-limiting point value such as 0.05%, 0.10%, 0.15%, 0.2%, or an interval value between any two typical but non-limiting point values.

[0065] In the above step S12, hydroxyethyl acrylate, pentaerythritol triacrylate, organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol are mixed and heated to 40° C. to 45° C., hydroxyethyl acrylate and pentaerythritol triacrylate are added dropwise within 1-2 hours, and the mixture is reacted at a temperature of 72° C. to 78° C. for 2 to 4 hours.

[0066] The hydroxyethyl acrylate and pentaerythritol triacrylate used in the examples of this application contain hydroxyl groups and carbon-carbon double bonds. Studies have shown that when using an organic bismuth catalyst at a temperature of 72°C to 78°C, the reaction may require a temperature of around 72°C to proceed rapidly. Furthermore, hydroxyethyl acrylate and pentaerythritol triacrylate contain carbon-carbon double bonds, which, after grafting onto the first product, make them suitable for UV-curable coatings. Exemplarily, hydroxyethyl acrylate, pentaerythritol triacrylate, organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol are mixed and the temperature is raised to 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, or any typical but non-limiting point value or an interval value between any two typical but non-limiting point values, the first product is added, and the reaction is carried out at a temperature of 72°C, 74°C, 76°C, 78°C, or any typical but non-limiting point value or an interval value between any two typical but non-limiting point values ​​for 2 hours, 3 hours, 4 hours, or any typical but non-limiting point value or an interval value between any two typical but non-limiting point values.

[0067] In some embodiments, the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is (0.4-0.6):(0.4-0.6):1. In this case, the hydroxyl groups of hydroxyethyl acrylate and pentaerythritol triacrylate are sufficiently prepared to react with the isocyanate groups of the first-stage reaction product to form a bio-based aliphatic polyurethane acrylate. For example, the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product can be any typical but non-limiting value, such as 0.4:0.4:1, 0.6:0.6:1, or any range between any two typical but non-limiting values.

[0068] In some embodiments, in the reaction system at the initial stage of the second reaction, the mass percentages of the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol are 0.05% to 0.2%, 0.1% to 0.5%, and 0.05% to 0.5%, respectively. The organic bismuth catalyst can fully catalyze the reaction between the hydroxyl groups of hydroxyethyl acrylate and pentaerythritol triacrylate and the isocyanate group of the first product, p-hydroxyanisole can fully inhibit polymerization, and 2,6-di-tert-butyl-p-cresol can fully act as an antioxidant, thereby reducing the amount of by-products generated and increasing the yield of the target product. Illustratively, in the reaction system in the initial stage of the second reaction, the mass percentage content of the organic bismuth catalyst can be any typical but non-limiting point value such as 0.05%, 0.1%, 0.15%, 0.2%, or an interval value between any two typical but non-limiting point values; the mass percentage content of p-hydroxyanisole can be any typical but non-limiting point value such as 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, or an interval value between any two typical but non-limiting point values; the mass percentage content of 2,6-di-tert-butyl-p-cresol can be any typical but non-limiting point value such as 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.40%, 0.45%, 0.5%, or an interval value between any two typical but non-limiting point values.

[0069] In some embodiments, the maleimide derivative is selected from at least one of N-phenylmaleimide and N-hydroxymaleimide. These maleimide derivatives can undergo a reversible reaction with the dihydroxy structure of 2,5-furan dimethanol in the bio-based high-flexibility aliphatic polyurethane acrylate. At room temperature or low temperature (25°C to 60°C), the conjugated double bond of the furan (dienol) reacts with the carbon-carbon double bond of the maleimide (dienophile) in a forward Diels-Alder reaction. At moderate temperatures (60°C to 100°C), the DA adduct undergoes a reverse Diels-Alder reaction when heated, decomposing back into furan and maleimide groups, temporarily dissociating the cross-linked network and increasing the chain segment mobility, thereby achieving damage repair.

[0070] In some embodiments, the spherical organosilicon powder is selected from at least one of Hangyu Technology HY-7000 and Gaohong Technology GW500NE-T; these spherical organosilicon powders are compounded with bio-based aliphatic polyurethane acrylate, UV active diluent, photoinitiator, etc. to provide the coating film with excellent skin feel and surface scratch resistance.

[0071] In some embodiments, the polymerization inhibitor is selected from Jiashan Bell Optical Materials N-nitroso-N-phenylhydroxylamine aluminum; the polymerization inhibitor used in the embodiment of the present application can effectively inhibit the reaction of the C=C double bond of the maleimide derivative with the bio-based aliphatic polyurethane acrylate and the UV active diluent C=C double bond, ensuring that the self-repairing UV excimer skin-feel coating has a scratch repair rate of ≥90% under the conditions of 60°C~100°C / 20min.

[0072] In some embodiments, the UV-reactive diluent is selected from a combination of acryloyl morpholine and tripropylene glycol diacrylate, wherein the acryloyl morpholine content is at least 10% by weight. The UV-reactive diluent in the embodiments of the present application adjusts the viscosity of the self-healing UV excimer skin-feel coating to make it suitable for application using a forward and reverse roller coater. Furthermore, the combination of acryloyl morpholine, tripropylene glycol diacrylate, bio-based aliphatic polyurethane acrylate, and a photoinitiator results in a coating film with a gloss between 2% and 5%, a flexibility that passes a 1mm mandrel test, and a coating film that does not crack when mechanically folded.

[0073] In some embodiments, the photoinitiator is selected from at least one of methyl benzoylformate and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate; both 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate photoinitiators can pre-cure the coating under LED light, and methyl benzoylformate photoinitiator can cause the coating to be micro-cured under 254nm excimer irradiation, and through bio-based aliphatic polyurethane The self-repairing UV excimer skin-feel coating is prepared by compounding acrylate, UV active diluent, photoinitiator, spherical silicone micropowder, leveling agent, etc., which makes the self-repairing UV excimer skin-feel coating suitable for construction by forward and reverse roller coating machines. Under the conditions of LED lamp pre-curing, 254nm excimer curing and mercury lamp curing, the coating film gloss is between 2% and 5%, the skin-feel effect is good, the flexibility passes the 1mm shaft rod test, and the coating film does not crack when mechanically folded. The coating film hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T 3655-2024 standard.

[0074] In some embodiments, the defoaming agent is selected from at least one of Evonik specialty chemicals TEGO920 and BYK Chemical BYK1791; the defoaming agent in the embodiment of the present application can reduce the surface tension of the foaming liquid and change the size of the surface pressure of the bubbles, thereby promoting the rupture of bubbles and the dissipation of foam, ensuring the smooth production and industrial construction of the self-repairing UV excimer skin-feel coating itself.

[0075] In some embodiments, the leveling agent is selected from at least one of Evonik Specialty Chemicals TEGO Rad 2500 and BYK-UV 3500. The leveling agent in this embodiment is a radiation-curable leveling agent that promotes the formation of a smooth, even, and uniform coating during the drying process, effectively improving the skin feel and durability of the coating.

[0076] An embodiment of the present application also provides a self-repairing UV excimer skin-feel coating. The self-repairing UV excimer skin-feel coating adopts the self-repairing UV excimer skin-feel coating described in the first aspect or the second aspect, and is constructed by a forward and reverse roller coating machine and then pre-cured with an LED lamp, cured with a 254nm excimer lamp, and cured with a mercury lamp.

[0077] Through the joint action of various components, the self-repairing UV excimer skin-feel coating is suitable for construction by forward and reverse roller coating machines, and under the conditions of LED lamp pre-curing, 254nm excimer curing and mercury lamp curing, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T3655-2024 standard, and its bio-based carbon content reaches between 37-46%. The surface effect, skin feel effect, flexibility and surface scratch resistance are all good. The coating passes the 1mm shaft rod test, the coating does not crack when mechanically folded, and the coating self-repair rate at medium temperature (60℃~100℃, 20min) is greater than or equal to 90%, and the coating is resistant to yellowing (pre-set conditions include equipment: QUV ultraviolet aging machine, wavelength: UVA-340, temperature: 60℃, irradiance: 0.68W / m2, time: 168h) ΔE is not higher than 3.

[0078] Preparation Example

[0079] The following preparation examples provide bio-based aliphatic polyurethane acrylates with different bio-based carbon contents, specifically including:

[0080] Resin A: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed, heated to 42-45°C, 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are added dropwise over 1.5-2.0 hours, and the mixture is heated to 60-65°C and maintained for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.1:0.9:2.05; the organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0081] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.4:0.6:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.05% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 75.5%.

[0082] Resin B: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed, heated to 42-45°C, 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are added dropwise over 1.5-2.0 hours, and the mixture is heated to 60-65°C and maintained for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.1:0.9:2.05; the organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0083] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.6:0.4:1. The organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.5% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 76.7%.

[0084] Resin C: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed, heated to 42-45°C, 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are added dropwise over 1.5-2.0 hours, and the mixture is heated to 60-65°C and maintained for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.15:0.9:2.05; the organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0085] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.4:0.6:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.05% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 75.4%.

[0086] Resin D: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed and heated to 42-45°C. 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are then added dropwise over 1.5-2.0 hours. The mixture is then heated to 60-65°C and held for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.15:0.85:2.1. The organic bismuth catalyst is present in an amount of 0.05% by weight of the total reactants, and the amount of 2,6-di-tert-butyl-p-cresol is 0.05% by weight of the total reactants.

[0087] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.6:0.6:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 73.3%.

[0088] Resin E: S11. Mix hexamethylene diisocyanate and an organic bismuth catalyst, raise the temperature to 42-45°C, and drip polytrimethylene ether glycol (ECOPROL H2000) from SK Chemicals (Korea) over 1.5-2.0 hours. Raise the temperature to 60-65°C and maintain for 3-4 hours to obtain the first product. The molar ratio of polytrimethylene ether glycol (ECOPROL H2000) from SK Chemicals (Korea) to hexamethylene diisocyanate is 1:2.05. The organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0089] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.4:0.6:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.05% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 77.8%.

[0090] Resin F: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed, heated to 42-45°C, 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are added dropwise over 1.5-2.0 hours, and the mixture is heated to 60-65°C and maintained for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.15:0.9:2.05; the organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0091] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.4:0.7:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.05% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 74.4%.

[0092] Resin G: S11. Mix hexamethylene diisocyanate and an organic bismuth catalyst, raise the temperature to 42-45°C, add 2,5-furan dimethanol and SK Chemical's polytrimethylene ether glycol ECOPROL H2000 dropwise, and complete the addition within 1.5-2.0 hours. Raise the temperature to 60-65°C and maintain for 3-4 hours to obtain the first product. The molar ratio of 2,5-furan dimethanol, SK Chemical's polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.15:0.85:2.1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.05% of the total weight of the reactants.

[0093] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.6:0.7:1. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.1% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 72.3%.

[0094] Resin H: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed and heated to 42-45°C. 2,5-furan dimethanol and SK Chemical polytrimethylene ether glycol ECOPROL H2000 (South Korea) are then added dropwise over 1.5-2.0 hours. The mixture is then heated to 60-65°C and held for 3-4 hours to obtain a first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.1:0.9:2.05. The organic bismuth catalyst accounts for 0.05% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants.

[0095] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.7:0.4:1. The organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.5% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 76.3%.

[0096] Resin I: S11, hexamethylene diisocyanate and an organic bismuth catalyst are mixed, heated to 42-45°C, 2,5-furan dimethanol and Sanyo Chemical polyethylene glycol PEG-1000 are added dropwise over 1.5-2.0 hours, the mixture is heated to 60-65°C, and the mixture is kept warm for 3-4 hours to obtain the first product. The molar ratio of 2,5-furan dimethanol, SK Chemical polytrimethylene ether glycol ECOPROL H2000, and hexamethylene diisocyanate is 0.1:0.9:2.05; the organic bismuth catalyst is present at 0.05% by weight of the total reactants, and 2,6-di-tert-butyl-p-cresol is present at 0.2% by weight of the total reactants.

[0097] S12. Mix the first product, the organic bismuth catalyst, p-hydroxyanisole, and 2,6-di-tert-butyl-p-cresol, then heat to 40-45°C. Add hydroxyethyl acrylate and pentaerythritol triacrylate dropwise over 1.5-2 hours. Raise the temperature to 75°C and maintain for 3-4 hours to produce a bio-based aliphatic polyurethane acrylate. The molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate, and the first product is 0.6:0.4:1. The organic bismuth catalyst accounts for 0.2% of the total weight of the reactants, the p-hydroxyanisole accounts for 0.5% of the total weight of the reactants, and the 2,6-di-tert-butyl-p-cresol accounts for 0.2% of the total weight of the reactants. The resulting bio-based UV resin has a bio-based carbon content of 76.7%.

[0098] Example 1

[0099] The present invention provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0100] S10, preparing bio-based aliphatic polyurethane acrylate (using resin A prepared in Preparation Example 1);

[0101] S20, obtain the following raw material components by weight:

[0102] Resin A: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Polymerization inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.1kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0103] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0104] Example 2

[0105] The difference from Example 1 is that resin B is used as bio-based aliphatic polyurethane acrylate.

[0106] Example 3

[0107] The difference from Example 1 is that resin C is used as bio-based aliphatic polyurethane acrylate.

[0108] Example 4

[0109] The difference from Example 1 is that resin D is used as bio-based aliphatic polyurethane acrylate.

[0110] Example 5

[0111] The present invention provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0112] S10, preparing bio-based aliphatic polyurethane acrylate (using resin B prepared in Preparation Example 2);

[0113] S20, obtain the following raw material components by weight:

[0114] Resin B: 50kg; Acryloylmorpholine: 15kg; Tripropylene glycol diacrylate: 21kg; Maleimide derivative: 5kg N-phenylmaleimide; Polymerization inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 2.6kg Hangyu Technology HY-7000; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 0.7kg Jiuri New Materials JRCure 1108; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 179; Leveling agent: 0.2kg Evonik Specialty Chemicals TEGO Rad 2500;

[0115] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0116] Example 6

[0117] The present invention provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0118] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0119] S20, obtain the following raw material components by weight:

[0120] Resin C: 50kg; Acryloylmorpholine: 20kg; Tripropylene glycol diacrylate: 15.3kg; Maleimide derivative: 7kg N-hydroxymaleimide; Polymerization inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical organosilicon powder: 1kg Gaohong Technology GW500NE-T; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 1kg Jiuri New Materials JRCure 1110; Defoamer: 0.3kg BYK Chemical BYK 1791; Leveling agent: 0.2kg BYK Chemical BYK-UV3500;

[0121] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0122] Example 7

[0123] The present invention provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0124] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0125] S20, obtain the following raw material components by weight:

[0126] Resin D: 59.9kg; Acryloylmorpholine: 25kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Polymerization inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0127] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0128] Comparative Example 1

[0129] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0130] S10, preparing bio-based aliphatic polyurethane acrylate (using resin E prepared in Preparation Example 5);

[0131] S20, obtain the following raw material components by weight:

[0132] Resin E: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivative: 4.7kg N-phenylmaleimide, 3kg N-hydroxymaleimide; Inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0133] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0134] Comparative Example 2

[0135] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0136] S10, preparing bio-based aliphatic polyurethane acrylate (using resin F prepared in Preparation Example 6);

[0137] S20, obtain the following raw material components by weight:

[0138] Resin F: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Polymerization inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.1kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0139] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0140] Comparative Example 3

[0141] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0142] S10, preparing bio-based aliphatic polyurethane acrylate (using resin G prepared in Preparation Example 7);

[0143] S20, obtain the following raw material components by weight:

[0144] Resin G: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.1kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0145] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0146] Comparative Example 4

[0147] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0148] S10, preparing bio-based aliphatic polyurethane acrylate (using resin H prepared in Preparation Example 8);

[0149] S20, obtain the following raw material components by weight:

[0150] Resin H: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.1kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0151] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0152] Comparative Example 5

[0153] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0154] S10, preparing bio-based aliphatic polyurethane acrylate (using resin I prepared in Preparation Example 9);

[0155] S20, obtain the following raw material components by weight:

[0156] Resin I: 60kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 15kg; Maleimide derivative: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.1kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0157] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0158] Comparative Example 6

[0159] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0160] S10, preparing bio-based aliphatic polyurethane acrylate (using resin B prepared in Preparation Example 2);

[0161] S20, obtain the following raw material components by weight:

[0162] Resin B: 60kg; Acryloylmorpholine: 8kg; Tripropylene glycol diacrylate: 17kg; Maleimide derivative: 4.7kg N-phenylmaleimide, 3kg N-hydroxymaleimide; Inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad2500, 0.1kg BYK-UV3500; wherein the amount of acryloylmorpholine is less than 10%;

[0163] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0164] Comparative Example 7

[0165] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0166] S10, preparing bio-based aliphatic polyurethane acrylate (using resin B prepared in Preparation Example 2);

[0167] S20, obtain the following raw material components by weight:

[0168] Resin B: 48kg; Acryloylmorpholine: 15kg; Tripropylene glycol diacrylate: 21kg; Maleimide derivative: 7kg N-phenylmaleimide; Polymerization inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical organosilicon powder: 2.6kg Hangyu Technology HY-7000; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 0.7kg Jiuri New Materials JRCure 1108; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 179; Leveling agent: 0.2kg Evonik Specialty Chemicals TEGO Rad 2500; The amount of bio-based aliphatic polyurethane acrylate used is less than 50%.

[0169] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0170] Comparative Example 8

[0171] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0172] S10, preparing bio-based aliphatic polyurethane acrylate (using resin D prepared in Preparation Example 4);

[0173] S20, obtain the following raw material components by weight:

[0174] Resin D: 62kg; Acryloylmorpholine: 10kg; Tripropylene glycol diacrylate: 13kg; Maleimide derivative: 4.7kg N-phenylmaleimide, 3kg N-hydroxymaleimide; Inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad2500, 0.1kg BYK-UV3500; the amount of bio-based aliphatic polyurethane acrylate is greater than 60%;

[0175] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0176] Comparative Example 9

[0177] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0178] S10, preparing bio-based aliphatic polyurethane acrylate (using resin A prepared in Preparation Example 1);

[0179] S20, obtain the following raw material components by weight:

[0180] Resin A: 51kg; Acryloylmorpholine: 15kg; Tripropylene glycol diacrylate: 21kg; Maleimide derivative: 4kg N-phenylmaleimide; Polymerization inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical organosilicon powder: 2.6kg Hangyu Technology HY-7000; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 0.7kg Jiuri New Materials JRCure 1108; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 179; Leveling agent: 0.2kg Evonik Specialty Chemicals TEGO Rad 2500; The maleimide content is less than 5%.

[0181] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0182] Comparative Example 10

[0183] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0184] S10, preparing bio-based aliphatic polyurethane acrylate (using resin D prepared in Preparation Example 4);

[0185] S20, obtain the following raw material components by weight:

[0186] Resin D: 59.9kg; Acryloylmorpholine: 25.5kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Polymerization inhibitor: 0.1kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 2.5kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500; JRCure 1055 content less than 3%;

[0187] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0188] Comparative Example 11

[0189] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0190] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0191] S20, obtain the following raw material components by weight:

[0192] Resin C: 50kg; Acryloylmorpholine: 20kg; Tripropylene glycol diacrylate: 15.1kg; Maleimide derivative: 7kg N-hydroxymaleimide; Inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Gaohong Technology GW500NE-T; Photoinitiator: 5.2kg Jiuri New Materials JRCure 1055, 1kg Jiuri New Materials JRCure 1110, Defoamer: 0.3kg BYK Chemical BYK 1791, Leveling Agent: 0.2kg BYK-UV3500; The amount of JRCure 1055 should be greater than 5%.

[0193] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0194] Comparative Example 12

[0195] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0196] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0197] S20, obtain the following raw material components by weight:

[0198] Resin C: 50kg; Acryloylmorpholine: 20kg; Tripropylene glycol diacrylate: 15.1kg; Maleimide derivative: 7kg N-hydroxymaleimide; Inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 1kg Gaohong Technology GW500NE-T; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 1.2kg Jiuri New Materials JRCure 1110, Defoamer: 0.3kg BYK Chemical BYK 1791, Leveling Agent: 0.2kg BYK-UV3500; The total amount of JRCure 1110 is greater than 1%.

[0199] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0200] Comparative Example 13

[0201] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0202] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0203] S20, obtain the following raw material components by weight:

[0204] Resin C: 60 kg; Acryloylmorpholine: 10 kg; Tripropylene glycol diacrylate: 15.1 kg; Maleimide derivative: 4.7 kg N-phenylmaleimide, 3 kg N-hydroxymaleimide; Inhibitor: 0.3 kg Aluminum N-nitroso-N-phenylhydroxylamine; spherical organosilicon powder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.2kg Jiuri New Materials JRCure 1110; defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; leveling agent: 0.1kg Evonik Specialty Chemicals TEGORad 2500, 0.1kg BYK Chemicals BYK-UV 3500; the total amount of JRCure 1108 and JRCure 1110 is less than 0.5%;

[0205] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0206] Comparative Example 14

[0207] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0208] S10, preparing bio-based aliphatic polyurethane acrylate (using resin C prepared in Preparation Example 3);

[0209] S20, obtain the following raw material components by weight:

[0210] Resin C: 50kg; Acryloylmorpholine: 20kg; Tripropylene glycol diacrylate: 15.8kg; Maleimide derivative: 7kg N-hydroxymaleimide; Polymerization inhibitor: 0.3kg N-nitroso-N-phenylhydroxylamine aluminum; Spherical silicone micropowder: 0.5kg Gaohong Technology GW500NE-T; Photoinitiator: 5kg Jiuri New Materials JRCure 1055, 1kg Jiuri New Materials JRCure 1110, Defoamer: 0.3kg BYK Chemical BYK1791, Leveling agent: 0.2kg BYK Chemical BYK-UV3500; The spherical silicone micropowder accounts for less than 1% of the total.

[0211] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0212] Comparative Example 15

[0213] This comparative example provides a self-repairing UV excimer skin-feel coating and a preparation method thereof, wherein the preparation method comprises:

[0214] S10, preparing bio-based aliphatic polyurethane acrylate (using resin D prepared in Preparation Example 4);

[0215] S20, obtain the following raw material components by weight:

[0216] Resin D: 60kg; Acryloylmorpholine: 25kg; Maleimide derivatives: 4kg N-phenylmaleimide, 4kg N-hydroxymaleimide; Spherical silicone micropowder: 1kg Hangyu Technology HY-7000, 2kg Gaohong Technology GW500NE-T; Photoinitiator: 3kg Jiuri New Materials JRCure 1055, 0.2kg Jiuri New Materials JRCure 1108, 0.3kg Jiuri New Materials JRCure 1110; Defoamer: 0.2kg Evonik Specialty Chemicals TEGO 920, 0.1kg BYK Chemicals BYK 1791; Leveling agent: 0.1kg Evonik Specialty Chemicals TEGO Rad 2500, 0.1kg BYK Chemicals BYK-UV3500;

[0217] S30, mixing the above raw materials to obtain a self-repairing UV excimer skin-feel coating.

[0218] Performance Testing

[0219] The self-healing UV254 excimer skin-feel coatings obtained in Examples 1-7 and Comparative Examples 1-14 were tested using GB / T 1730-1993, GB / T 9286-2021, GB / T 1731-2020, and HG / T 3655-2024 standards. After application using a forward and reverse roller coater, the coatings were pre-cured with an LED lamp (curing energy: UVV: 200-250 mj / cm²), cured with a 254nm excimer lamp (curing energy: UVV 100-120 mj / cm²), and then cured with a UV mercury lamp (curing energy: UVA 500-550 mj / cm²). The results are shown in Tables 1-4. Hardness was tested using the pencil method with five cycles of -20°C for 2 hours and 50°C for 2 hours.

[0220] Table 1 is a table of performance test results of Examples 1 to 4

[0221] project Example 1 Example 2 Example 3 Example 4 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 45.3 46 45.2 44.2 Viscosity (25℃, Stowe membrane) 89KU 88KU 85KU 86KU Curing performance pass pass pass pass Surface effects good good good good Defoaming good good good good Fineness 20μm 20μm 20μm 20μm Storage stability 8 8 8 8 hardness H H H H Cross-cut test Level 1 Level 1 Level 1 Level 1 luster 3.7-4.1％ 3.5-4.0％ 3.8-4.1％ 3.5-4.0％ Surface scratch resistance (10N) pass pass pass pass Flexibility (1mm shaft) pass pass pass pass Medium temperature self-repair rate 91％ 91％ 93％ 93％ Skin feel effect good good good good Dry heat resistant Level 1 Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 2 Level 2 Water resistance Level 1 Level 1 Level 1 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 2 Level 2 pollution-resistant Level 1 Level 1 Level 1 Level 1 Yellowing resistance 2.2 2.5 2.8 2.4 Resistant to cold and heat shock qualified qualified qualified qualified

[0222] Table 2 is the performance test results of Examples 4 to 7

[0223] project Example 5 Example 6 Example 7 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 38.3 37.6 44.1 Viscosity (25℃, Stowe membrane) 80KU 82KU 89KU Curing performance pass pass pass Surface effects good good good Defoaming good good good Fineness 20um 20um 20um Storage stability 8 8 8 hardness H H H Cross-cut test Level 1 Level 1 Level 1 luster 4.5-4.8％ 4.5-4.7％ 3.9-4.1％ Surface scratch resistance (10N) pass pass pass Flexibility (1mm shaft) pass pass pass Medium temperature 90％ 93％ 94％ Skin feel effect good good good Dry heat resistant Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 2 Water resistance Level 1 Level 1 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 2 pollution-resistant Level 1 Level 1 Level 1 Yellowing resistance 2.3 2.5 2.2 Resistant to cold and heat shock qualified qualified qualified

[0224] Table 3 is the performance test results of the self-repairing UV excimer skin-feel coatings obtained from Comparative Examples 1 to 4

[0225] project Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 46.7 46 45.2 44.2 Viscosity (25℃, Stowe membrane) 87KU 89KU 88KU 86KU Curing performance pass pass pass Fail Surface effects good good good good Defoaming good good good good Fineness 20um 20um 20um 20um Storage stability 8 8 8 8 hardness H H H HB Cross-cut test Level 1 Level 1 Level 1 Level 1 luster 3.1-3.8％ 3.2-3.5％ 3.8-4.1％ 9.2-9.9％ Surface scratch resistance (10N) pass pass pass Fail Flexibility (1mm shaft) pass Fail Fail pass Medium temperature self-repair rate 0％ 92％ 93％ 93％ Skin feel effect good Difference Difference good Dry heat resistant Level 1 Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 2 Level 2 Water resistance Level 1 Level 1 Level 1 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 2 Level 2 pollution-resistant Level 1 Level 1 Level 1 Level 1 Yellowing resistance 2.0 2.8 2.8 2.1 Resistant to cold and heat shock qualified qualified qualified qualified

[0226] Table 4 is the performance test results of the self-repairing UV excimer skin-feel coatings obtained in Comparative Examples 5 to 8

[0227] project Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 0 46 38.3 44.2 Viscosity (25℃, Stowe membrane) 82KU 88KU 81KU 93KU Curing performance pass pass pass pass Surface effects good good good Poor Defoaming good good good good Fineness 20um 20um 20um 20um Storage stability 8 8 8 8 hardness H H H H Cross-cut test Level 1 Level 1 Level 1 Level 1 luster 15.3-15.5％ 3.5-3.9％ 6.5-6.8％ 3.0-3.5％ Surface scratch resistance (10N) pass pass pass pass Flexibility (1mm shaft) Fail Fail pass pass Medium temperature self-repair rate 91％ 91％ 90％ 93％ Skin feel effect Difference good good Difference Dry heat resistant Level 1 Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 3 Level 1 Water resistance Level 1 Level 1 Level 2 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 3 Level 1 pollution-resistant Level 1 Level 1 Level 1 Level 1 Yellowing resistance 2.5 2.5 2.4 2.3 Resistant to cold and heat shock qualified qualified qualified qualified

[0228] Table 5 is the performance test results of the self-repairing UV excimer skin-feel coatings obtained from Comparative Examples 9 to 12

[0229] project Comparative Example 9 Comparative Example 10 Comparative Example 11 Comparative Example 12 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 38.3 44.1 37.6 37.6 Viscosity (25℃, Stowe membrane) 81KU 88KU 82KU 82KU Curing performance pass Fail pass pass Surface effects good good good good Defoaming good good good good Fineness 20um 20um 20um 20um Storage stability 8 8 8 8 hardness H 2B H H Cross-cut test Level 1 Level 1 Level 1 Level 1 luster 4.5-4.8％ 7.9-8.1％ 9.5-10.7％ 23-23.5％ Surface scratch resistance (10N) pass Fail pass pass Flexibility (1mm shaft) pass pass pass pass Medium temperature self-repair rate 63％ 94％ 93％ 93％ Skin feel effect good good good good Dry heat resistant Level 1 Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 2 Level 2 Water resistance Level 1 Level 1 Level 1 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 2 Level 2 pollution-resistant Level 1 Level 1 Level 1 Level 1 Yellowing resistance 2.3 2.2 2.5 2.5 Resistant to cold and heat shock qualified qualified qualified qualified

[0230] Table 6 is the performance test results of the self-repairing UV excimer skin-feel coatings obtained in Comparative Examples 12 to 15

[0231] project Comparative Example 13 Comparative Example 14 Comparative Example 15 Appearance Light yellow thick liquid Light yellow thick liquid Light yellow thick liquid Bio-based carbon content / % 45.2 37.6 44.1 Viscosity (25℃, Stowe membrane) 85KU 82KU 89KU Curing performance pass pass pass Surface effects good good good Defoaming good good good Fineness 20um 20um 20um Storage stability 8 8 8 hardness H H H Cross-cut test Level 1 Level 1 Level 1 luster 3.8-4.1％ 4.2-4.5％ 3.9-4.1％ Surface scratch resistance (10N) pass Fail pass Flexibility (1mm shaft) pass pass pass Medium temperature self-repair rate 93％ 93％ 52％ Skin feel effect Difference Difference good Dry heat resistant Level 1 Level 1 Level 1 Moisture and heat resistant Level 2 Level 2 Level 2 Water resistance Level 1 Level 1 Level 1 Alcohol resistance Level 1 Level 1 Level 1 Alkali resistance Level 2 Level 2 Level 2 pollution-resistant Level 1 Level 1 Level 1 Yellowing resistance 2.8 2.5 2.2 Resistant to cold and heat shock qualified qualified qualified

[0232] As can be seen from Tables 1 to 6, the self-repairing UV254 excimer skin-feel coating provided by the present invention first prepares a bio-based aliphatic polyurethane acrylate, and through the interaction between the various components, the bio-based carbon content of the self-made bio-based aliphatic polyurethane acrylate is between 72-75%. Secondly, a self-repairing UV254 excimer skin-feel coating is prepared. Through the joint action of each component, it is suitable for coating with forward and reverse roller coating equipment. Under the conditions of LED lamp pre-curing, 254nm excimer lamp curing and UV mercury lamp irradiation, the self-repairing UV254 excimer skin-feel coating film has a gloss between 2% and 5%, good skin-feel effect, and flexibility passes the 1mm shaft rod test. The coating does not crack when mechanically folded, and the coating resistance meets the requirements of the HG / T3655-2024 UV-curing wood coating industry standard. The self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, and the yellowing resistance (equipment: QUV UV aging machine, wavelength: UVA-340, temperature: 60°C, irradiance: 0.68W / m2, time: 168h) ΔE is not higher than 3.0.

[0233] The difference between Comparative Example 1 and Example 1 is whether 2,5-furan dimethanol is added in the first reaction of preparing bio-based aliphatic polyurethane acrylate; the difference between Comparative Example 9 and Example 5 is whether the amount of maleimide derivative added is less than 5%; in the preparation of bio-based aliphatic polyurethane acrylate, a molar ratio of polyether glycol to hexamethylene diisocyanate of 1:2.05 is used to obtain the first product, and the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is 0.4:0.6:1. The coating gloss is 3.1-3.8%, the coating adhesion is level 1, and the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches between 38.3-45.3%, the surface effect, skin feel effect, flexibility, surface scratch resistance and yellowing resistance are all good, the coating does not crack when mechanically folded, but the self-repair rate of the coating at medium temperature (60-100, 20min) is 0; in the preparation of self-repairing UV254 excimer skin-feel coating, the addition of maleimide derivatives is less than 5%, the coating gloss is 4.5-4.8%, the coating adhesion is level 1, and the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches 38.3%, the surface effect, skin effect, flexibility, surface scratch resistance and yellowing resistance are good, the coating does not crack when mechanically folded, but the self-repair rate of the coating at medium temperature (60-100, 20min) is 63%; in the preparation of bio-based aliphatic polyurethane acrylate, the molar ratio of 2,5-furan dimethanol, polyether glycol and hexamethylene diisocyanate is (0.1-0.15 ):0.9:2.05 to obtain the first product, the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is 0.4:0.6:1 to obtain the second product scheme, and in the preparation of self-repairing UV254 excimer skin-feel coating, a 5%-8% scheme of maleimide derivatives is added, the gloss of the coating is between 2-5%, the adhesion of the coating is level 1, the hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties of the coating meet the requirements of HG / T 3655-2024 standard, and its bio-based carbon content reaches 45.3%, the surface effect, skin effect, flexibility, surface scratch resistance and yellowing resistance are all good, the coating does not crack when mechanically folded, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, indicating that the self-repair of the coating is affected by the combined action of 2,5-furan dimethanol and maleimide derivatives.

[0234] The difference between Comparative Example 2 and Example 3 is whether the molar ratio of pentaerythritol triacrylate is increased in the second reaction of preparing bio-based aliphatic polyurethane acrylate. The difference between Comparative Example 3 and Example 4 is whether the molar ratio of pentaerythritol triacrylate is increased in the second reaction of preparing bio-based aliphatic polyurethane acrylate. The difference between Comparative Example 4 and Example 2 is whether the molar ratio of hydroxyethyl acrylate is increased in the second reaction of preparing bio-based aliphatic polyurethane acrylate. The difference between Comparative Example 5 and Example 2 is whether Sanyo Chemical's polyethylene glycol PEG-1000 is used instead of South Korea SK Chemical's polytrimethylene ether glycol ECOPROL in the first reaction of preparing bio-based aliphatic polyurethane acrylate. H2000; the molar ratio of 2,5-furan dimethanol, polyether glycol and hexamethylene diisocyanate is (0.1-0.15): (0.85-0.9): (2.05-2.1) to obtain the first product, and the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is (0.4-0.6): 0.7: 1 to obtain the second product scheme, the coating gloss is between 2-5%, the coating adhesion is level 1, and the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches between 44.2-45.2%, the surface effect, skin feel, surface scratch resistance and yellowing resistance are all good, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, but the flexibility of the coating does not pass the 1mm shaft rod, and the coating mechanically folds and cracks; the molar ratio of 2,5-furan dimethanol, polyether glycol and hexamethylene diisocyanate is (0.1-0.15): (0.85-0.9): (2.05-2.1) to obtain the first product, the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is 0.7: (0.4-0.6): 1 Obtain a second product scheme, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T 3655-2024 standard, and its bio-based carbon content is 46%, the surface effect, skin feel effect, flexibility and yellowing resistance are all good, and the coating self-repair rate at medium temperature (60-100, 20min) is not less than 90%, the coating does not crack when mechanically folded, but its curing performance is not passed, the hardness is lower than H, and the surface scratch resistance is poor; when preparing bio-based aliphatic polyurethane acrylate, Sanyo Chemical Polyethylene Glycol PEG-1000 is used to replace South Korea SK Chemical Polytrimethylene Ether Glycol ECOPROL H2000, the curing performance is passed, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches 0, the surface effect, flexibility, surface scratch resistance and yellowing resistance are all good, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, the coating gloss is greater than 5%, the skin feel effect is poor, the flexibility is poor, and the coating does not crack when mechanically folded; the molar ratio of 2,5-furan dimethanol, polyether glycol and hexamethylene diisocyanate is (0.1-0.15): (0.85-0.9): (2.05-2.1) to obtain the first product, the molar ratio of hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is (0.4-0.6): (0.4-0.6): 1 to obtain the second product scheme, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches between 44.2% and 46%. It also exhibits excellent surface effects, skin feel, flexibility, surface scratch resistance, and yellowing resistance. The coating also exhibits a self-repair rate of no less than 90% at medium temperatures (60-100°C, 20 minutes), no cracking when mechanically folded, and a passing cure performance. This indicates that the coating's flexibility is affected by the combination of hydroxyethyl acrylate, pentaerythritol triacrylate, and SK Chemical's polytrimethylene ether glycol ECOPROL H2000; gloss is affected by SK Chemical's polytrimethylene ether glycol ECOPROL H2000; and skin feel is affected by the combination of hydroxyethyl acrylate, pentaerythritol triacrylate, and SK Chemical's polytrimethylene ether glycol ECOPROL H2000.

[0235] The difference between Comparative Example 6 and Comparative Example 2 is whether the amount of acryloyl morpholine added is less than 10%. For the scheme with less than 10%, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T 3655-2024 standard, and its bio-based carbon content reaches between 44.2-45.2%, the surface effect, surface scratch resistance and yellowing resistance are good, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, but the coating skin feel effect is poor, the flexibility does not pass the 1mm shaft rod, and the coating mechanically folds and cracks; if the amount of acryloyl morpholine added is greater than or equal to 10%, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet the requirements of HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches between 44.2-46%, the surface effect, skin feel effect, flexibility, surface scratch resistance and yellowing resistance are all good, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, the coating does not crack when mechanically folded, and the curing performance is passed; combined with Comparative Example 2 and Example 3, Comparative Example 3 and Example 4, Comparative Example 4 and Example 2, Comparative Example 5 and Example 2, it is shown that the skin feel effect and flexibility of the coating are affected by the resin preparation raw materials hydroxyethyl acrylate, pentaerythritol triacrylate and Korean SK Chemical polytrimethylene ether glycol ECOPROL H2000 and the compounding of bio-based aliphatic polyurethane acrylate and acryloyl morpholine; the gloss of the coating is affected by Korean SK Chemical polytrimethylene ether glycol ECOPROL H2000 and acryloyl morpholine, and the amount of acryloyl morpholine added should be greater than 10%.

[0236] The difference between Comparative Example 7 and Example 5 is whether the bio-based aliphatic polyurethane acrylate is less than 50%, and the difference between Comparative Example 8 and Example 4 is whether the bio-based aliphatic polyurethane acrylate is higher than 60%. Whether the bio-based aliphatic polyurethane acrylate is lower than 50%, the coating gloss is greater than 5%, the moisture and heat resistance and alkali resistance do not meet the requirements of HG / T 3655-2024 standard, the coating adhesion is level 1, its bio-based carbon content reaches 38.3, and other properties meet the requirements; whether the bio-based aliphatic polyurethane acrylate is higher than 60%, the viscosity is too high, the surface effect is poor, the bio-based content reaches 44.2, and other properties meet the requirements; it shows that the addition amount of bio-based aliphatic polyurethane acrylate has an impact on the coating gloss, moisture and heat resistance and alkali resistance, and its addition amount is between 50% and 60%.

[0237] The difference between Comparative Example 10 and Example 7 is whether the addition amount of Jiuri New Material JRCure1055 is less than 3%, the difference between Comparative Example 11 and Example 6 is whether the addition amount of Jiuri New Material JRCure1055 is higher than 5%, the difference between Comparative Example 12 and Example 6 is whether the sum of Jiuri New Material JRCure1108 and JRCure1110 is higher than 1%, and the difference between Comparative Example 13 and Example 3 is whether the sum of Jiuri New Material JRCure1108 and JRCure1110 is lower than 0.5%; the addition amount of Jiuri New Material JRCure1055 is lower than 3%, the coating curing performance does not pass, the coating film gloss is greater than 5%, and the coating film hardness does not meet the HG / T 3655-2024 standard requirements, the coating film scratch resistance does not pass, its bio-based carbon content reaches 44.1%, and other properties meet the requirements; Jiuri New Material JRCure1055 addition is higher than 5% of the program, the coating gloss is greater than 5%, its bio-based carbon content reaches 37.6%, and other properties pass or meet the requirements; Jiuri New Material JRCure1108 and JRCure1110 sum is higher than 1% of the program, the coating gloss is greater than 5%, its bio-based carbon content reaches 37.6%, and other properties pass or meet the requirements; Jiuri New Material J The sum of RCure1108 and JRCure1110 is less than 0.5%, the coating skin feel is poor, its bio-based carbon content reaches 45.2%, and other properties pass or meet the requirements; the addition amount of JRCure1055 is between 3-5%, and the sum of JRCure1108 and JRCure1110 is between 0.5-1%. The coating gloss is between 2-5%, the coating adhesion is level 1, and the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, pollution resistance and other properties meet HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches 37.6%, the surface effect, skin feel effect, flexibility, surface scratch resistance and yellowing resistance are all good, the coating does not crack when mechanically folded, and the coating has a self-repair rate of not less than 90% at medium temperature (60-100, 20min); it shows that the gloss of the coating is affected by JRCure1055, JRCure1108 and JRCure1110, and the skin feel effect is also affected by JRCure1108 and JRCure1110, the addition amount of JRCure1055 is between 3-5%, and the sum of JRCure1108 and JRCure1110 is between 0.5-1%.

[0238] The difference between Comparative Example 14 and Example 6 is whether the addition amount of spherical organosilicon powder is less than 1%. When the addition amount of spherical organosilicon powder is less than 1%, the scratch resistance of the coating fails, the skin feel is poor, and its bio-based carbon content reaches 37.6%. Other properties pass or meet the requirements; when the addition amount of spherical organosilicon powder is greater than or equal to 1%, the gloss of the coating is between 2-5%, the adhesion of the coating is level 1, and the hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, and pollution resistance of the coating meet the HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches 37.6%, the surface effect, skin feel effect, flexibility, surface scratch resistance and yellowing resistance are all good, the coating does not crack when mechanically folded, and the coating has a medium temperature (60-100, 20min) self-repair rate of not less than 90%, indicating that the spherical organosilicon powder has an effect on the scratch resistance and skin feel effect of the coating, and the amount of spherical organosilicon powder added should be greater than or equal to 1%.

[0239] The difference between Comparative Example 15 and Example 7 is whether 0.1% N-nitroso-N-phenylhydroxylamine aluminum polymerization inhibitor is added. In the scheme where N-nitroso-N-phenylhydroxylamine aluminum polymerization inhibitor is not added, the self-repair rate of the coating at medium temperature (60-100, 20min) is 52%, and other properties pass or meet the requirements; in the scheme where 0.1% N-nitroso-N-phenylhydroxylamine aluminum polymerization inhibitor is added, the gloss of the coating is between 2-5%, the adhesion of the coating is level 1, and the hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance, and pollution resistance of the coating meet the HG / T 3655-2024 standard requirements, and its bio-based carbon content reaches 44.1%, the surface effect, skin feel effect, flexibility, surface scratch resistance and yellowing resistance are all good, the coating does not crack when mechanically folded, and the coating has a medium temperature (60-100, 20min) self-repair rate of not less than 90%, indicating that the N-nitroso-N-phenylhydroxylamine aluminum inhibitor has an effect on the medium temperature (60-100, 20min) self-repair rate of the coating, and the amount of N-nitroso-N-phenylhydroxylamine aluminum inhibitor added is greater than or equal to 0.1%.

[0240] In summary, a preparation method and application of a self-repairing UV254 excimer skin-feel coating are provided. In the first aspect, a preparation method of a bio-based aliphatic polyurethane acrylate is provided. The prepared bio-based aliphatic polyurethane acrylate is carried out in two steps. The first step is: hexamethylene diisocyanate, 2,5-furan dimethanol and polyether glycol are reacted to obtain a first product; the second step is: hydroxyethyl acrylate, pentaerythritol triacrylate and the first product are reacted to obtain a bio-based aliphatic polyurethane acrylate, and the bio-based carbon content is between 72-75%. The second aspect provides a method for preparing a self-repairing UV254 excimer skin-feel coating, which is compounded with components such as prepared bio-based aliphatic polyurethane acrylate, UV active diluent, photoinitiator, spherical silicone micropowder, defoaming agent and leveling agent to make the self-repairing UV254 excimer skin-feel coating suitable for construction by a forward and reverse roller coating machine, and under the conditions of LED lamp pre-curing, 254nm excimer curing and mercury lamp curing, the coating gloss is between 2-5%, the coating adhesion is level 1, the coating hardness, dry heat resistance, wet heat resistance, water resistance, alkali resistance, alcohol resistance and stain resistance are The dyeability and other properties meet the requirements of HG / T3655-2024 standards, and its bio-based carbon content reaches between 37-46%. The surface effect, skin feel, flexibility and surface scratch resistance are all good. The coating passes the 1mm shaft rod test, the coating does not crack when mechanically folded, and the self-repair rate of the coating at medium temperature (60-100, 20min) is not less than 90%, and the coating is resistant to yellowing (equipment: QUV ultraviolet aging machine, wavelength: UVA-340, temperature: 60℃, irradiance: 0.68W / m2, time: 168h) ΔE is not higher than 3.

[0241] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant description of other embodiments. The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not limited thereto. Although the embodiments of this application are described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the embodiments of this application, and should be included in the protection scope of the embodiments of this application.

Claims

1. A self-repairing UV excimer skin-feel coating, characterized in that: The composition comprises the following components in parts by weight: 50-60 parts of bio-based aliphatic polyurethane acrylate; 25-36 parts of UV active diluent; 5-8 parts of maleimide derivative; 1-3 parts of organosilicon micropowder; 0.1-0.3 parts of polymerization inhibitor; 3.5-6 parts of photoinitiator; 0.2-0.3 parts of defoaming agent; 0.2-0.5 parts of leveling agent; The bio-based carbon content in the bio-based aliphatic polyurethane acrylate is 72% to 75%.

2. A method for preparing a self-repairing UV excimer skin-feel coating, characterized in that: The following steps are involved: preparing a bio-based aliphatic polyurethane acrylate, wherein the bio-based carbon content of the bio-based aliphatic polyurethane acrylate is 72% to 75%; Obtain the following raw materials in parts by weight: 50-60 parts of the bio-based aliphatic polyurethane acrylate, 25-36 parts of UV active diluent, 5-8 parts of maleimide derivative, 0.1-0.3 parts of polymerization inhibitor, 1-3 parts of organosilicon powder, 3.5-6 parts of photoinitiator, 0.2-0.3 parts of defoamer, and 0.2-0.5 parts of leveling agent; The above raw materials are mixed to obtain the self-repairing UV excimer skin-feel coating.

3. The preparation method according to claim 2, wherein The method for preparing bio-based aliphatic polyurethane acrylate comprises the following steps: Hexamethylene diisocyanate, 2,5-furan dimethanol, polyether glycol, an organic bismuth catalyst, and 2,6-di-tert-butyl-p-cresol are mixed and subjected to a first reaction to obtain a first product; Hydroxyethyl acrylate, pentaerythritol triacrylate, an organic bismuth catalyst, p-hydroxyanisole, 2,6-di-tert-butyl-p-cresol and the first product are mixed and then subjected to a second reaction to obtain the bio-based aliphatic polyurethane acrylate.

4. The preparation method according to claim 2, wherein The reaction conditions of the first reaction include: reacting at a temperature of 60°C to 65°C for 3 to 4 hours; And / or, the second reaction includes: mixing the first product, an organic bismuth catalyst, p-hydroxyanisole and 2,6-di-tert-butyl-p-cresol, heating the mixture to 40°C to 45°C, adding hydroxyethyl acrylate and pentaerythritol triacrylate dropwise within 1 to 2 hours, and reacting at a temperature of 72°C to 78°C for 2 to 4 hours.

5. The preparation method according to claim 4, wherein The polyether glycol is Korean SK Chemical polytrimethylene ether glycol ECOPROL H2000, which has a bio-based carbon content of 100%; and / or, the molar ratio of 2,5-furan dimethanol, polyether glycol, and hexamethylene diisocyanate is (0.1-0.15):(0.85-0.9):(2.05-2.1); And / or, the molar ratio of the hydroxyethyl acrylate, pentaerythritol triacrylate and the first product is (0.4-0.6):(0.4-0.6):

1.

6. The preparation method according to claim 4, wherein In the reaction system at the initial stage of the first reaction: The mass percentage of the organic bismuth catalyst is 0.05% to 0.2%; The mass percentage of the 2,6-di-tert-butyl-p-cresol is 0.05% to 0.2%; And / or, in the reaction system at the initial stage of the second reaction: The mass percentage of the organic bismuth catalyst is 0.05% to 0.2%; The mass percentage of the p-hydroxyanisole is 0.1% to 0.5%; The mass percentage of the 2,6-di-tert-butyl-p-cresol is 0.05% to 0.5%.

7. The preparation method according to claim 2, wherein The maleimide derivative includes at least one of N-phenylmaleimide and N-hydroxymaleimide; And / or, the spherical organosilicon powder includes at least one of Hangyu Technology HY-7000 and Gaohong Technology GW500NE-T.

8. The preparation method according to claim 2, wherein The UV active diluent comprises acryloylmorpholine and tripropylene glycol diacrylate, wherein the mass percentage of acryloylmorpholine is not less than 10%; And / or, the photoinitiator comprises methyl benzoylformate and at least one of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate, wherein the mass percentage of methyl benzoylformate is between 3% and 5%, and the sum of the mass percentages of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and ethyl 2,4,6-trimethylbenzoylphenylphosphonate is between 0.5% and 1%; And / or, the defoaming agent is selected from at least one of Evonik Specialty Chemicals TEGO920 and BYK Chemicals BYK1791; And / or, the leveling agent is selected from at least one of Evonik Specialty Chemicals TEGO Rad 2500 and BYK-UV3500.

9. A self-repairing UV excimer skin-feel coating, characterized in that: The self-repairing UV excimer skin-feel coating film adopts the self-repairing UV excimer skin-feel coating according to claim 1 or any one of claims 2 to 8, and is constructed by a forward and reverse roller coating machine and then pre-cured with an LED lamp, cured with a 254nm excimer lamp, and cured with a mercury lamp.

10. The self-repairing UV excimer skin-feel coating according to claim 9, characterized in that: The gloss of the self-repairing UV excimer skin-feel coating is between 2% and 5%; And / or, the self-repairing UV excimer skin-feel coating has a scratch repair rate of not less than 90% under the conditions of a temperature of 60° C. to 100° C. for 20 minutes; And / or, the yellowing degree ΔE of the self-repairing UV excimer skin-feel coating under preset test conditions is ≤3.0.

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