A uv-feel coating, method of making, method of use and applications

Abstract

The present application relates to the technical field of UV light curing paint, in particular to a kind of UV skin feeling paint, preparation method, use method and application, by weight parts, including: two functional group polyurethane acrylate resin 25~40 parts;Three functional group polyurethane acrylate resin 10~25 parts;Modified epoxy acrylate resin 5~15 parts;Active diluent 15~30 parts;Skin feeling aid 3~10 parts;Photoinitiator 2~6 parts;Matting powder 3~10 parts;Adhesion promoter 1~4 parts;Leveling agent 0.3~1.5 parts;Defoaming agent 0.1~0.8 parts;Dispersing agent 0.3~1.5 parts;The modified epoxy acrylate resin is the modified epoxy acrylate oligomer containing polar epoxy group and ester group;The skin feeling aid is modified elastic spherical resin or high molecular polymer dispersion.The paint has excellent skin feeling effect, strong adhesion to PETG substrate, good flexibility, yellowing resistance and low VOC.

Description

Technical Field

[0001] This invention relates to the field of UV curable coating technology, specifically to a UV skin-feel coating, its preparation method, its application method, and its application. Background Technology

[0002] PETG (polyethylene terephthalate-1,4-cyclohexanediol) home furnishing film is bonded to the surface of furniture panels using a vacuum forming process, providing furniture with rich decorative effects and excellent surface protection. The surface coating of the home furnishing film is the functional layer directly exposed to the external environment; its feel, scratch resistance, stain resistance, and visual effect directly affect the quality and user experience of home furnishing products. In recent years, as consumers' pursuit of the surface texture of home furnishing products has continuously increased, a skin-feel effect—that is, a coating surface with a delicate, warm, and silky touch similar to human skin—has become an important development direction for high-end home decorative films. UV (ultraviolet) skin-feel coatings, by forming a matte coating with a micro-nano textured structure on the surface of the PETG film, achieve both a soft matte visual effect and a unique tactile experience.

[0003] However, current UV skin-feel coatings mainly suffer from the following problems. Traditional UV skin-feel coatings often achieve a matte finish by adding a large amount of matting powder, but this significantly reduces the coating's scratch resistance and abrasion resistance, making it difficult to balance the skin-feel effect with mechanical properties. PETG material has a relatively low surface energy, approximately 40-45 mN / m, and is a non-crystalline polyester material with few polar groups on its surface. Existing UV coatings lack sufficient wetting and adhesion to PETG substrates, easily leading to coating peeling and cracking. PETG home furnishing films undergo complex stretching deformation during vacuum forming, requiring the coating to possess good flexibility and elongation. However, existing UV coatings often become brittle after curing, easily causing cracking and whitening on products with large vacuum forming depths or complex curved surfaces. Furthermore, home furnishing films are exposed to sunlight over long-term use. Existing UV skin-feel coatings are prone to yellowing under prolonged UV exposure, affecting aesthetics. Additionally, traditional solvent-based UV coatings contain large amounts of organic solvents, resulting in high VOC (volatile organic compound) emissions, which do not meet increasingly stringent environmental protection requirements. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a UV skin-feel coating that exhibits excellent skin-feel properties, strong adhesion to PETG substrates, good flexibility, resistance to yellowing, and low VOCs, thus possessing significant technical value and broad market prospects.

[0005] This invention provides a UV skin-feel coating, comprising, by weight: 25-40 parts of difunctional polyurethane acrylate resin; 10-25 parts of trifunctional polyurethane acrylate resin; 5-15 parts of modified epoxy acrylate resin; 15-30 parts of reactive diluent; 3-10 parts of skin-feel additive; 2-6 parts of photoinitiator; 3-10 parts of matting agent; 1-4 parts of adhesion promoter; 0.3-1.5 parts of leveling agent; 0.1-0.8 parts of defoamer; and 0.3-1.5 parts of dispersant. The modified epoxy acrylate resin is a modified epoxy acrylate oligomer containing polar epoxy groups and ester groups. The skin-feel additive is a modified elastic spherical resin or a polymer dispersion.

[0006] Existing UV skin-feel coatings cannot effectively balance coating flexibility and surface scratch resistance. This invention initially constructed a high-crosslink density coating using trifunctional polyurethane acrylate resin as the main resin, aiming to achieve excellent surface scratch resistance. However, during vacuum forming, the coating could not adapt to the stretching deformation of the PETG film, resulting in large-area cracks. This invention further introduces the elastomer toughening effect of difunctional aliphatic polyurethane acrylate resin combined with skin-feel additives, and controls the amount of difunctional resin to 25-40 parts and trifunctional resin to 10-25 parts. This allows the coating to balance skin feel, scratch and abrasion resistance, flexibility, and vacuum forming adaptability, preventing cracking or whitening on furniture products with large vacuum forming depths or complex curved surfaces, thus meeting the process requirements of vacuum forming.

[0007] Furthermore, this invention simultaneously introduces modified epoxy acrylate resin and phosphate ester adhesion promoters into the above resin system, solving the adhesion problem of low surface energy PETG substrates through the combined effects of physical affinity and chemical anchoring. Specifically, the polar epoxy groups and ester groups in the modified epoxy acrylate resin molecular structure provide good affinity and physical adsorption to the PETG surface; the phosphate carboxyl groups in the phosphate ester adhesion promoter form chemical bonds or strong hydrogen bonds with the polar groups on the PETG surface, providing chemical anchoring.

[0008] Traditional UV skin-feel coatings typically add large amounts of matting powder to achieve a matte finish, but this severely sacrifices mechanical and coating properties. This invention achieves a matte finish by controlling the amount of matting powder to a low range of 3-10 parts and irradiating the coating surface with an excimer lamp (172nm or 254nm). This causes the surface polymer molecules to selectively and rapidly crosslink and shrink, forming a micro-nano textured structure, thus achieving a matte skin-feel effect. This avoids the chalking and mechanical property degradation caused by high matting powder additions and solves the problem of insufficient skin-feel effect without an excimer lamp, achieving a balance between reduced matting powder usage and improved skin-feel effect.

[0009] In one embodiment, the UV skin-feel coating, by weight, comprises: 28-35 parts of difunctional polyurethane acrylate resin; 15-22 parts of trifunctional polyurethane acrylate resin; 8-12 parts of modified epoxy acrylate resin; 18-25 parts of reactive diluent; 4-8 parts of skin-feel additive; 3-5 parts of photoinitiator; 4-8 parts of matting agent; 1.5-3 parts of adhesion promoter; 0.5-1 part of leveling agent; 0.2-0.5 parts of defoamer; and 0.5-1 part of dispersant.

[0010] In one embodiment, the difunctional polyurethane acrylate resin comprises a difunctional aliphatic polyurethane acrylate resin.

[0011] In one embodiment, the type of the bifunctional polyurethane acrylate resin includes at least one of Guangdong Boxin B-241, Zhanxin Ebecryl-4740, or Sartoma CN964.

[0012] In one embodiment, the trifunctional polyurethane acrylate resin includes at least one of Ebecryl-4858, Sartoma CN9013NS, or Miki SM-6305.

[0013] In one embodiment, the modified epoxy acrylate resin includes at least one of BASF LR9019, Haohui HE3215, or Zhanxin Ebecryl-3701.

[0014] In one embodiment, the reactive diluent includes monofunctional acrylate monomers, difunctional acrylate monomers, and trifunctional acrylate monomers.

[0015] In one embodiment, the reactive diluent includes isobornyl acrylate (IBOA), 1,6-hexanediol diacrylate (HDDA), and trimethylolpropane triacrylate (TMPTA).

[0016] In one embodiment, the mass ratio of isoborneol acrylate, 1,6-hexanediol diacrylate, and trimethylolpropane triacrylate is 2-4:2-3:1-2.

[0017] In one embodiment, the skin-feeling additive includes at least one of Tego-2300, BYK-3570, or Lankeluo L-3007F and L-3068.

[0018] In one embodiment, the photoinitiator includes acylphosphine oxide photoinitiators and α-hydroxyketone photoinitiators.

[0019] In one embodiment, the photoinitiator comprises 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) and 1-hydroxycyclohexylphenyl ketone (184).

[0020] In one embodiment, the mass ratio of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide to 1-hydroxycyclohexylphenyl ketone is 1:1 to 1:3.

[0021] This invention achieves efficient adaptation of LED-excimer lamp-mercury lamp multi-band curing processes by simultaneously introducing acylphosphine oxides and α-hydroxy ketone photoinitiators, while also taking into account curing efficiency and yellowing resistance.

[0022] In one embodiment, the matting agent includes at least one of Evonik ACEMATT-OK500, Tosoh E-1011, or Gold Pure UV650.

[0023] In one embodiment, the adhesion promoter includes at least one of Lencolo 4051, DH-7340, or Guangzhou Jincheng KM2130.

[0024] In one embodiment, the leveling agent includes at least one of BYK-UV3500, BYK-333, or Tego-Flow300.

[0025] In one embodiment, the defoamer includes at least one of Tego-Foamex825, BYK-055, or Zhongshan Shunhong AK680.

[0026] In one embodiment, the dispersant includes at least one of BYK-110, Uniqsperse 510S, or the Lencolo series.

[0027] Another aspect of the present invention provides a method for preparing a UV skin-feel coating, comprising the following steps: Add the difunctional polyurethane acrylate resin, the trifunctional polyurethane acrylate resin and the modified epoxy acrylate resin into the reaction vessel, and stir at 400-600 rpm for 15-30 minutes to mix the resins. Add 60-70 wt% of the total amount of reactive diluent and stir at 500-700 rpm for 10-20 minutes; add the photoinitiator and continue stirring for 20-40 minutes until the photoinitiator is completely dissolved to obtain the mixture. After premixing the matting powder, skin-feeling additive and the remaining reactive diluent, add them to the mixture and disperse at high speed at 800-1200 rpm for 30-60 minutes until the fineness is ≤15μm; Add adhesion promoter, leveling agent, defoamer and dispersant, and continue stirring at 500-700 rpm for 20-40 minutes. Adjust the viscosity to 200-800 cps at 25°C with reactive diluent. Filter through a 200-400 mesh filter to obtain UV skin-feel coating.

[0028] A third aspect of the present invention provides a method for using a UV skin-feel coating, comprising the following steps: The UV skin-feel coating is applied to the surface of PETG film by micro-groove coating, roller coating, or slot extrusion, with a coating amount of 5–20 g / m². 2 After coating, the PETG skin-feel film with a coating thickness of 3-10 μm is obtained by sequentially undergoing LED (light-emitting diode) pre-curing, excimer lamp skin-feel molding, and mercury lamp final curing processes.

[0029] In one embodiment, the LED pre-curing uses a 395nm LED with an energy of 100–200 mJ / cm². 2 ; In one embodiment, the excimer lamp skin-feel molding uses a 172nm or 254nm excimer lamp to form a micro-nano uneven structure on the coating surface, thereby achieving a skin-feel matte effect. In one embodiment, the final curing of the mercury lamp is performed using a UV mercury lamp with an energy of 300–500 mJ / cm². 2 This allows the coating to cure.

[0030] In one embodiment, the PETG skin-feel film can be further vacuum-formed and bonded to the furniture board.

[0031] The fourth aspect of this invention provides the application of a UV skin-feel coating in the preparation of PETG home decoration film, automotive interior film, 3C electronic product decoration film or building material decoration film.

[0032] Beneficial effects 1. This invention provides a UV skin-feel coating, which has excellent skin-feel effect, strong adhesion to PETG substrate, good flexibility, resistance to yellowing and low VOC, and has important technical value and broad market prospects.

[0033] 2. By further introducing the elastomer toughening effect of difunctional aliphatic polyurethane acrylate resin combined with skin-feeling additives, and controlling the amount of difunctional resin to be in the range of 25-40 parts and the amount of trifunctional resin to be in the range of 10-25 parts, the coating can take into account skin feel, scratch and wear resistance, flexibility and vacuum forming adaptability. This ensures that the coating will not crack or whiten on furniture products with large vacuum forming depth or complex curved surfaces, and can meet the process requirements of vacuum forming integrated molding.

[0034] 3. This invention solves the adhesion problem of PETG low surface energy substrate by simultaneously introducing modified epoxy acrylate resin and phosphate ester adhesion promoter into the above resin system, through the combined effect of physical affinity and chemical anchoring.

[0035] 4. This invention controls the amount of matting powder to a low range of 3 to 10 parts, and uses an excimer lamp (172nm or 254nm) to irradiate the coating surface. Through the selective and rapid cross-linking and shrinkage of the surface polymer molecules, a micro-nano uneven structure is formed, thereby achieving a matte skin feel effect. This not only avoids the coating chalking and mechanical property degradation caused by the addition of high matting powder, but also solves the problem of insufficient skin feel effect without an excimer lamp, achieving a balance between reducing the amount of matting powder and improving the skin feel effect.

[0036] 5. This invention achieves efficient adaptation of LED-excimer lamp-mercury lamp multi-band curing process by simultaneously introducing acylphosphine oxides and α-hydroxy ketone photoinitiators, while taking into account both curing efficiency and yellowing resistance.

[0037] 6. This invention is a solvent-free or extremely low-solvent UV curing system with extremely low VOC content (<50g / L), which meets environmental protection regulations. Furthermore, the raw materials are widely available, the preparation process is mature, and it can be produced using large-scale coating methods such as microgravure coating, which has good prospects for industrial production and significant economic benefits. Detailed Implementation

[0038] Example 1 Example 1 of the present invention provides a UV skin-feel coating, comprising, by weight: 32 parts of difunctional polyurethane acrylate resin (Guangdong Boxin B-241), 18 parts of trifunctional polyurethane acrylate resin (Zhanxin Ebecryl-4858), 10 parts of modified epoxy acrylate resin (BASF LR9019), 22 parts of reactive diluent (IBOA:HDDA:TMPTA=3:2.5:1.5), and skin-feel coating. 5 parts of additive (Tego-2300), 4 parts of photoinitiator (Jiuri New Material TPO:184=1:2), 5 parts of matting agent (Evonik ACEMATT-OK500), 2 parts of adhesion promoter (Lencolo4051), 0.6 parts of leveling agent (BYK-UV3500), 0.3 parts of defoamer (Tego-Foamex825), and 0.5 parts of dispersant (BYK-110).

[0039] Example 1 of the present invention provides a method for preparing a UV skin-feel coating, comprising the following steps: Difunctional polyurethane acrylate resin, trifunctional polyurethane acrylate resin and modified epoxy acrylate resin were added to a reaction vessel and stirred at 500 rpm for 20 minutes to mix the resins. Add 70 wt% of the total amount of reactive diluent and stir at 500 rpm for 15 minutes; add the photoinitiator and continue stirring for 30 minutes until the photoinitiator is completely dissolved to obtain the mixture. After premixing the matting powder, skin feel additive and the remaining reactive diluent, add them to the mixture and disperse at high speed at 1000 rpm for 45 minutes until the fineness is ≤15μm; Add adhesion promoter, leveling agent, defoamer and dispersant, stir at 600 rpm for 30 minutes, filter through a 300-mesh filter to obtain UV skin-feel coating.

[0040] The UV skin-feel coating is applied as follows: the obtained coating is applied to the surface of a PETG film using a micro-gravure coating method, with a coating amount of 12g / m². 2 Cured sequentially by 395nm LED lamps (150mJ / cm) 2 ), 254nm excimer lamp curing, UV mercury lamp (400mJ / cm) 2 Curing yields a PETG skin-feel film with a coating thickness of 9 μm.

[0041] Example 2 Example 2 of the present invention provides a UV skin-feel coating, comprising, by weight: 35 parts of difunctional polyurethane acrylate resin (Zhanxin Ebecryl-4740), 15 parts of trifunctional polyurethane acrylate resin (Sartoma CN9013NS), 8 parts of modified epoxy acrylate resin (Haohui HE3215), 20 parts of reactive diluent (IBOA:HDDA:TMPTA=3:2:2), 6 parts of skin-feel additive (BYK-3570), 4.5 parts of photoinitiator (Yangfan New Material YF-PI 184:TPO=2:1), 6 parts of matting agent (Tosoh E-1011), 2.5 parts of adhesion promoter (DH-7340-), 0.5 parts of leveling agent (BYK-333), 0.3 parts of defoamer (BYK-055), and 0.8 parts of dispersant (Uniqsperse 510S).

[0042] The preparation method is the same as in Example 1.

[0043] The coating method is roller coating (coating amount 10g / m²). 2 The curing process is the same as in Example 1.

[0044] Example 3 Example 3 of the present invention provides a UV skin-feel coating, comprising, by weight: 30 parts of difunctional polyurethane acrylate resin (Sartoma CN964), 20 parts of trifunctional polyurethane acrylate resin (Sanmu SM-6305), 12 parts of modified epoxy acrylate resin (Zhanxin Ebecryl-3701), 18 parts of reactive diluent (IBOA:HDDA:TMPTA=4:3:1), 4 parts of skin-feel additive (Tego-2300), 3.5 parts of photoinitiator (Jiuri New Material 184:TPO=2:1), 7 parts of matting agent (Jinchun UV650), 1.8 parts of adhesion promoter (Guangzhou Jincheng KM2130), 0.8 parts of leveling agent (Digo Tego-Flow300), 0.4 parts of defoamer (Zhongshan Shunhong AK680), and 0.6 parts of dispersant (BYK-110).

[0045] The preparation method is the same as in Example 1.

[0046] The coating method is slot coating (coating amount 8g / m²). 2 The curing process is the same as in Example 1.

[0047] Example 4 Example 4 of the present invention provides a UV skin-feel coating, comprising, by weight: 28 parts of difunctional polyurethane acrylate resin (Guangdong Boxin B-241), 22 parts of trifunctional polyurethane acrylate resin (Zhanxin Ebecryl-4858), 10 parts of modified epoxy acrylate resin (BASF LR9019), 25 parts of reactive diluent (IBOA:HDDA:TMPTA=2:3:2), 7 parts of skin-feel additive (BYK-3570), 5 parts of photoinitiator (Jiuri New Material TPO:184=1:1), 4 parts of matting agent (Evonik ACEMATT-OK500), 3 parts of adhesion promoter (Lencolo4051), 1 part of leveling agent (BYK-UV3500), 0.5 parts of defoamer (Tego-Foamex825), and 1 part of dispersant (BYK-110).

[0048] The preparation method is the same as in Example 1.

[0049] The coating method is microgravure coating (coating amount 15g / m²). 2 The curing process is the same as in Example 1.

[0050] Comparative Example 1 Comparative Example 1 of the present invention provides a UV skin-feel coating and its preparation and application methods. The specific implementation method is the same as that of Example 1, except that the difunctional polyurethane acrylate resin (B-241) is not added, and its amount is increased by an equal amount to the trifunctional polyurethane acrylate resin (Ebecryl-4858).

[0051] Comparative Example 2 Comparative Example 2 of the present invention provides a UV skin-feel coating and its preparation and application methods. The specific implementation method is the same as that of Example 1, except that modified epoxy acrylate resin (LR9019) is not added, and its amount is increased by an equal amount to that of difunctional polyurethane acrylate resin (B-241).

[0052] Comparative Example 3 Comparative Example 3 of the present invention provides a UV skin-feel coating and its preparation and application methods. The specific implementation method is the same as that of Example 1, except that no adhesion promoter (Lencolo4051) is added.

[0053] Comparative Example 4 Comparative Example 4 of the present invention provides a UV skin-feel coating and its preparation and application methods. The specific implementation method is the same as that of Example 1, except that the 254nm excimer lamp curing step is omitted in the application method, and only a 395nm LED lamp and a UV mercury lamp are used for curing.

[0054] Comparative Example 5 Comparative Example 5 of the present invention provides a UV skin-feel coating and its preparation and application methods. The specific implementation method is the same as that of Example 1, except that the amount of matting powder (OK500) added is increased from 5 parts to 15 parts, and the amount of reactive diluent is reduced to 8 parts.

[0055] Performance testing The properties of the coatings obtained in Examples 1-4 and Comparative Examples 1-5 were tested according to the following methods, and the test results are shown in Table 1.

[0056] (1) Viscosity: measured at 25°C using a Brookfield DV-II rotational viscometer in accordance with GB / T 1723-1993.

[0057] (2) Curing speed: UV energy (mJ / cm²) required for the coating to reach surface dryness under the same curing conditions. 2 )express.

[0058] (3) Adhesion: Tested according to GB / T 9286-2021 cross-cut test, rated from 0 to 5, with 0 being the best.

[0059] (4) Flexibility: Bend the coated and cured PETG film 180° along a 10mm diameter rod and observe whether the coating at the bend will crack or whiten.

[0060] (5) Skin feel effect: divided into four levels: excellent (delicate and silky feel), good (obvious skin feel), average (not obvious skin feel), poor (no skin feel), and poor (no skin feel), which are respectively recorded as 10 points, 8 points, 6 points and 4 points. The highest and lowest scores of 10 people are removed, the average is taken, and then rounded up to correspond to the four levels.

[0061] (6) Scratch resistance: Use 0000# steel wool, apply a load of 500g, and rub back and forth on the coating surface. Record the number of rubs when obvious scratches appear.

[0062] (7) Yellowing resistance: The cured coating was placed in a QUV aging test chamber and aged for 7 days using a UVA-340 lamp. The yellowing index ΔE was then measured.

[0063] (8) Gloss (60°): Measured according to GB / T 9754-2025 standard.

[0064] Table 1 Test Results

[0065] Analysis of the data in Table 1 shows that the coatings obtained in Examples 1 to 4 of this invention exhibit excellent performance in terms of adhesion, flexibility, skin feel, scratch resistance, and yellowing resistance, and have low gloss. Their overall performance is significantly better than that of the comparative examples.

[0066] Compared to Example 1, which did not contain the difunctional polyurethane acrylate resin (B-241), the coating obtained in Comparative Example 1 showed a significant decrease in flexibility, with obvious cracking and whitening observed during bending tests. During vacuum forming, the coating could not adapt to the stretching deformation of the PETG film, resulting in large-area cracks. While the skin feel was acceptable, the coating was brittle and could not meet the requirements of the vacuum forming process.

[0067] Compared to Example 1, without the addition of modified epoxy acrylate resin (LR9019), the coating in Comparative Example 2 showed a significant decrease in adhesion to the PETG substrate, with the cross-cut test rating dropping from 0 to 2, and large-area peeling of the coating after the cross-cut test. Although the flexibility was improved, the scratch resistance decreased slightly, from 250 times to 180 times.

[0068] Compared to Example 1, without the addition of adhesion promoter (Lencolo 4051), Comparative Example 3 showed a significant decrease in the adhesion of the coating to the PETG substrate, with a cross-cut test rating dropping to level 3. The coating also exhibited edge lifting and peeling during the bending test. Insufficient initial adhesion resulted in the coating being extremely prone to peeling during subsequent thermoforming and processing.

[0069] In Comparative Example 4, the 254nm excimer lamp curing step was omitted from the curing process of Comparative Example 1. The resulting coating exhibited a significantly increased gloss, with the 60° gloss increasing from 3.5° to 15°. However, the skin feel deteriorated from excellent to average, and the surface smoothness and delicacy were noticeably insufficient, making it closer to a regular matte coating than a skin-feel coating. The scratch resistance also decreased slightly, from 250 scratches to 200 scratches.

[0070] Compared with Example 1, the amount of matting powder (OK500) added in Comparative Example 5 was increased from 5 parts to 15 parts. The gloss of the resulting coating was further reduced, with a gloss of 1.5° at 60°. The skin feel was good, but the scratch resistance was severely reduced, from 250 times to 80 times. Slight chalking appeared on the surface of the coating, and the matting powder was difficult to disperse during coating, and the transparency of the coating was significantly reduced.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A UV skin-feel coating, characterized in that, By weight, it comprises: 25-40 parts of difunctional polyurethane acrylate resin; 10-25 parts of trifunctional polyurethane acrylate resin; 5-15 parts of modified epoxy acrylate resin; 15-30 parts of reactive diluent; 3-10 parts of skin-feeling additive; 2-6 parts of photoinitiator; 3-10 parts of matting agent; 1-4 parts of adhesion promoter; 0.3-1.5 parts of leveling agent; 0.1-0.8 parts of defoamer; and 0.3-1.5 parts of dispersant. The modified epoxy acrylate resin is a modified epoxy acrylate oligomer containing polar epoxy groups and ester groups. The skin-feeling additive is a modified elastic spherical resin or a polymer dispersion.

2. The UV skin-feel coating according to claim 1, characterized in that, The difunctional polyurethane acrylate resin includes aliphatic polyurethane acrylate resin.

3. The UV skin-feel coating according to claim 1, characterized in that, The trifunctional polyurethane acrylate resin includes at least one of Ebecryl-4858, Sartoma CN9013NS, or Miki SM-6305.

4. The UV skin-feel coating according to claim 1, characterized in that, The modified epoxy acrylate resin includes at least one of BASF LR9019, Haohui HE3215, or Zhanxin Ebecryl-3701.

5. The UV skin-feel coating according to claim 1, characterized in that, The reactive diluents include monofunctional acrylate monomers, difunctional acrylate monomers, and trifunctional acrylate monomers.

6. The UV skin-feel coating according to claim 1, characterized in that, The skin-feeling additives include at least one of Tego-2300, BYK-3570, or Lankeluo L-3007F and L-3068.

7. The UV skin-feel coating according to claim 1, characterized in that, The photoinitiators include acylphosphine oxide photoinitiators and α-hydroxyketone photoinitiators.

8. A method for preparing a UV skin-feel coating according to any one of claims 1-7, comprising the following steps: Add the difunctional polyurethane acrylate resin, the trifunctional polyurethane acrylate resin and the modified epoxy acrylate resin into the reaction vessel, and stir at 400-600 rpm for 15-30 minutes to mix the resins. Add 60-70 wt% of the total amount of reactive diluent and stir at 500-700 rpm for 10-20 minutes; Add the photoinitiator and continue stirring for 20–40 minutes until the photoinitiator is completely dissolved to obtain the mixture. After premixing the matting powder, skin feel additive and the remaining reactive diluent, add them to the mixture and disperse at high speed at 800-1200 rpm for 30-60 minutes until the fineness is ≤15μm; Add adhesion promoter, leveling agent, defoamer and dispersant, and continue stirring at 500-700 rpm for 20-40 minutes. Adjust the viscosity to 200-800 cps at 25°C with reactive diluent. Filter through a 200-400 mesh filter to obtain UV skin-feel coating.

9. A method of using a UV skin-feel coating according to any one of claims 1-7, comprising the following steps: The UV skin-feel coating is applied to the surface of PETG film by micro-groove coating, roller coating, or slot extrusion, with a coating amount of 5–20 g / m². 2 After coating, the PETG skin-feel film with a coating thickness of 3-10 μm is obtained by sequentially undergoing LED lamp pre-curing, excimer lamp skin-feel molding, and mercury lamp final curing processes.

10. The application of a UV skin-feel coating according to any one of claims 1-7 in the preparation of PETG home decoration film, automotive interior film, 3C electronic product decoration film or building material decoration film.

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