Scratch-resistant skin-touch water-based paint as well as preparation method and application thereof

Abstract

The invention provides an anti-scratch skin-touch water-based coating. The anti-scratch skin-touch water-based coating is prepared from the following components in parts by weight: 30 to 50 parts of water-based polyurethane acrylate prepolymer, 10 to 20 parts of reactive diluent, 1 to 2 parts of photoinitiator, 0.1 to 0.5 part of flatting agent, 0.1 to 0.5 part of defoaming agent, 5 to 15 parts of photo-thermal induced shortened chopped fiber, 2 to 5 parts of micron silicon dioxide and 10 to 30 parts of water. According to the anti-scratch skin-touch water-based paint provided by the invention, a micro-nano structure is formed on the surface of the paint through photo-thermal induced shortened cut fibers and micron silicon dioxide, so that the skin-touch effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of functional coatings, in particular to an anti-scratch and skin-feeling water-based coating, a preparation method and application thereof. BACKGROUND

[0002] In today's product design and manufacturing field, the characteristics of the material surface play a crucial role in product quality and user experience. Anti-scratch and skin-feeling effects, as two key characteristics of the material surface, are increasingly attracting widespread attention from various industries. From daily life electronic products such as mobile phone and tablet computer shells, to furniture, automotive interiors, and even cosmetic packaging, people have increasingly high requirements for the appearance and touch of products. Anti-scratch effect can effectively protect the product surface, making it not easy to be scratched and worn during daily use, thereby maintaining good appearance and integrity and prolonging the service life of the product. The skin-feeling effect gives the product a unique touch, making users feel comfortable, soft and warm when touching the product, greatly improving the user experience and increasing the added value of the product.

[0003] Current technical exploration of anti-scratch and skin-feeling water-based coatings mainly focuses on three directions: first, resin molecular design, which controls the balance of elasticity and hardness through aliphatic modified polyurethane acrylate segments, but single-component resins are difficult to balance skin feeling and anti-scratch; second, nanoparticle enhancement, which combines 1-500nm SiO2 with resin, which can increase the hardness to 3.5H, but particle agglomeration leads to rough skin feeling; third, synergistic optimization of additives, which uses polyether modified silicone leveling agent and silicone rubber microspheres to reduce the friction coefficient to below 0.18, but the softness of silicone rubber microspheres reduces the scratch resistance of the coating, and long-term use can cause hand feeling to decay.

[0004] Therefore, there is an urgent need in the art for an innovative technical solution that can fundamentally improve the scratch resistance, wear resistance, stain resistance and comprehensive physical properties of the coating while maintaining the environmental advantages of water-based coatings and achieving extreme skin feeling, to meet the increasingly stringent requirements of high-end markets for decoration and functionality. SUMMARY

[0005] The technical problem to be solved is to provide an anti-scratch and skin-feeling water-based coating, which forms a micro-nano structure on the surface of the coating by light-induced thermal shrinkage of short-cut fibers and micron-sized silica, achieving the effect of skin feeling.

[0006] Technical solution: An anti-scratch and skin-feeling water-based coating, comprising the following components by weight: Water-based polyurethane acrylate prepolymer: 30-50 parts Active diluent: 10-20 parts Photoinitiator: 1-2 parts Leveling agent: 0.1-0.5 parts Defoamer: 0.1~0.5 parts Photothermal shrinkage shortened fiber: 5-15 parts Micron-sized silica: 2-5 parts Water: 10 to 30 parts.

[0007] Preferably, the method for preparing the photo-induced shrinkage short-cut fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches and stir the solution to obtain PAA solution. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until homogeneous to obtain a mixed solution. Add the mixed solution to PAA solution to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution; S14. Add nano-silica to the spinning solution prepared in step S13 to obtain the skin spinning solution; S15. Electrospinning the core spinning solution in S12 and the skin spinning solution prepared in S14 to obtain electrospun fibers; S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0008] Preferably, in step S11, the mass ratio of ODA to PMDA is 1:1.05~1.1, and the concentration of the PAA solution is 10~18wt%.

[0009] Preferably, in step S12, the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10-15 mL, and the volume ratio of the mixed solution to the PAA solution is 1:3-5.

[0010] Preferably, the concentration of the spinning solution in step S13 is 10~15wt%.

[0011] Preferably, in step S14, the mass ratio of nano-silica to spinning solution is 1:10~15.

[0012] Preferably, the electrospinning parameters in step S15 are: spinning voltage 15~18kV, spinning distance 12~15 cm, skin flow rate 0.5~0.8mL / h, core flow rate 0.3~0.5mL / h, and receiving roller rotation speed 4000~5000r / min.

[0013] Preferably, the waterborne polyurethane acrylate prepolymer is any one of RUW-2025B, RAW2140, and RAW9240; The reactive diluent is either 1,6-hexanediol diacrylate or trimethylolpropane triacrylate; The photoinitiator is any one of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 2,4,6-trimethylbenzoyl diphenylphosphine oxide; The leveling agent is any one or more of polydimethylsiloxane, polydimethylphenylsiloxane, or BYK-333 polyether modified polydimethylsiloxane; The defoamer is either GP-330 polyoxyethylene polyoxypropylene ether or BYK-024 polyether modified siloxane.

[0014] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0015] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate, with a coating amount of 10~25g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0016] Beneficial effects: The anti-scratch, skin-feeling water-based coating of the present invention has the following advantages: In this invention, photothermal shrinkage shortened chopped fibers are dispersed in the coating system in a "core-skin" structure. The skin layer contains nano-silica, which endows the fibers with high hardness and high wear resistance. As a reinforcing skeleton inside the coating, it can effectively resist the damage to the coating caused by external scratches and friction, and significantly improve the scratch resistance and service life of the coating. At the same time, the moderate shrinkage of the fibers under photothermal action can form a tight network structure inside the coating, further enhancing the integrity and impact resistance of the coating and reducing the residue of scratches. The nano-silica in the short-cut fiber skin is an inorganic nanomaterial. When combined with micron-sized silica, it gives the coating surface a micro-nano-level rough structure. When the human body comes into contact with the coating, this micro-nano structure can reduce the pressure concentration on the contact surface, forming a delicate texture similar to the touch of skin. Moreover, the uniform dispersion of the fibers can form a uniform micro-nano uneven structure on the coating surface, improving the smoothness and warmth of the touch, and achieving a high-quality skin feel that is soft but not slippery and moist but not sticky. In this invention, the core layer contains azophenyl functional groups. Under ultraviolet light irradiation, azophenyl undergoes a reversible cis-trans isomerization reaction, causing the core layer to shrink. After shrinkage, the fiber's outer layer forms a micro-nano structure of nano-silica, achieving a skin-feel effect. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments. These embodiments are illustrative of the present invention, but the present invention is not limited to these embodiments: Example 1

[0018] A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 30 parts 1,6-Hexanediol diacrylate: 10 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1 part BYK-333 polyether-modified polydimethylsiloxane: 0.1 parts BYK-024 polyether-modified siloxane: 0.1 parts Photothermal shrinkage shortened fiber: 5 parts Micron-sized silica: 2 parts Water: 10 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of ODA to PMDA of 1:1.05. After stirring the solution, a PAA solution with a concentration of 18wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution with a volume ratio of 1:5 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 10wt%; S14. Add nano-silica to the spinning solution prepared in step S13, wherein the mass ratio of nano-silica to spinning solution is 1:15, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 15kV, spinning distance 12cm, sheath flow rate 0.8mL / h, core flow rate 0.3mL / h, and receiving roller speed 5000r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0019] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0020] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 15 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0021] Example 2

[0022] A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 50 parts 1,6-Hexanediol diacrylate: 20 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 2 parts BYK-333 polyether-modified polydimethylsiloxane: 0.5 parts BYK-024 polyether-modified siloxane: 0.5 parts Photothermal shrinkage shortened fiber: 15 parts Micron-sized silica: 5 parts Water: 30 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of ODA to PMDA of 1:1.1. After stirring the solution, a PAA solution with a concentration of 10wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 15 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution with a volume ratio of 1:3 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 15wt%; S14. Add nano-silica to the spinning solution prepared in step S13, wherein the mass ratio of nano-silica to spinning solution is 1:10, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 18kV, spinning distance 15 cm, sheath flow rate 0.5mL / h, core flow rate 0.5mL / h, and receiving roller speed 4000r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0023] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0024] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 25 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0025] Example 3

[0026] A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 35 parts 1,6-Hexanediol diacrylate: 12 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1 part BYK-333 polyether-modified polydimethylsiloxane: 0.2 parts BYK-024 polyether-modified siloxane: 0.2 parts Photothermal shrinkage shortened fiber: 8 parts Micron-sized silica: 3 parts Water: 15 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches. The mass ratio of ODA to PMDA is 1:1.05. After stirring the solution, a PAA solution with a concentration of 12wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 12 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4.5 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 12wt%; S14. Add nano-silica to the spinning solution prepared in step S13, with a mass ratio of nano-silica to spinning solution of 1:12, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 16kV, spinning distance 13cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4000r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0027] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0028] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 15 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0029] Example 4

[0030] A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 45 parts 1,6-Hexanediol diacrylate: 18 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 2 parts BYK-333 polyether-modified polydimethylsiloxane: 0.4 parts BYK-024 polyether-modified siloxane: 0.4 parts Photothermal shrinkage shortened fiber: 12 parts Micron-sized silica: 4 parts Water: 25 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 16wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 14 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution with a volume ratio of 1:3.5 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S14. Add nano-silica to the spinning solution prepared in step S13, with a mass ratio of nano-silica to spinning solution of 1:14, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 18kV, spinning distance 15cm, sheath flow rate 0.7mL / h, core flow rate 0.5mL / h, and receiving roller speed 5000r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0031] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0032] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0033] Example 5

[0034] A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Photothermal shrinkage shortened fiber: 10 parts Micron-sized silica: 4 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 15wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S14. Add nano-silica to the spinning solution prepared in step S13, with a mass ratio of nano-silica to spinning solution of 1:14, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 17kV, spinning distance 14cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4500r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0035] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0036] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0037] Comparative Example 1 The difference between the comparative example and Example 5 is that the fiber is ordinary short-cut fiber; A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Short-cut fibers: 10 parts Micron-sized silica: 4 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S12. Add nano-silica to the spinning solution prepared in step S11, wherein the mass ratio of nano-silica to spinning solution is 1:14, to obtain the spinning solution; S15. Electrospin the spinning solution in S12. The electrospinning parameters are: spinning voltage 16kV, spinning distance 14cm, flow rate 0.7mL / h, and receiving roller speed 5000r / min to obtain electrospinned fibers. S13. Cut the electrospun fibers to 1-3 mm and store them away from light.

[0038] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, chopped fiber, micronized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0039] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0040] Comparative Example 2 The difference between Comparative Example 2 and Example 5 is that the skin layer does not contain nano-silica; A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Photothermal shrinkage shortened fiber: 10 parts Micron-sized silica: 4 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 15wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a 13wt% skin spinning solution; S14. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S13. The electrospinning parameters are: spinning voltage 17kV, spinning distance 14cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4500r / min to obtain electrospinned fibers. S15. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0041] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0042] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0043] Comparative Example 3 The difference between Comparative Example 3 and Example 5 is that Comparative Example 3 does not contain micron-sized silicon dioxide; A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Photothermal shrinkage shortened fiber: 10 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 15wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S14. Add nano-silica to the spinning solution prepared in step S13, with a mass ratio of nano-silica to spinning solution of 1:14, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 17kV, spinning distance 14cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4500r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0044] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then a photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, water, and reactive diluent are added in sequence. After each reaction material is added, the next material is added only after stirring evenly, until all materials are added and mixed evenly to obtain the anti-scratch water-based coating.

[0045] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0046] Comparative Example 4 The difference between Comparative Example 4 and Example 5 is that micron-sized silica and nano-sized silica are simultaneously added to the skin layer of the electrospun yarn; A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Photothermal shrinkage shortened fiber: 10 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 15wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S14. Add nano- and micro-sized silica to the spinning solution prepared in step S13. The mass ratio of nano-silica to micro-sized silica to the spinning solution is 1:1:20 to obtain the skin spinning solution. S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 17kV, spinning distance 14cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4500r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0047] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0048] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.

[0049] Comparative Example 5 The difference between Comparative Example 5 and Example 5 is that Comparative Example 5 does not undergo thermosetting; A scratch-resistant, skin-feeling water-based coating comprises the following components in parts by weight: RUW-2025B Waterborne Polyurethane Acrylic Prepolymer: 40 parts 1,6-Hexanediol diacrylate: 15 parts 2-Hydroxy-2-methyl-1-phenyl-1-propanone: 1.5 parts BYK-333 polyether-modified polydimethylsiloxane: 0.3 parts BYK-024 polyether-modified siloxane: 0.3 parts Photothermal shrinkage shortened fiber: 10 parts Micron-sized silica: 4 parts Water: 20 parts; The method for preparing the photo-induced shrinkage and shortening of the shredded fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches at a mass ratio of 1:1.05. After stirring the solution, a PAA solution with a concentration of 15wt% is obtained. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10 mL. Stir until a mixed solution is obtained. Add the mixed solution to PAA solution. The volume ratio of the mixed solution to PAA solution is 1:4 to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution with a concentration of 13wt%; S14. Add nano-silica to the spinning solution prepared in step S13, with a mass ratio of nano-silica to spinning solution of 1:14, to obtain the skin spinning solution; S15. Electrospinning is performed on the core spinning solution in S12 and the sheath spinning solution prepared in S14. The electrospinning parameters are: spinning voltage 17kV, spinning distance 14cm, sheath flow rate 0.6mL / h, core flow rate 0.4mL / h, and receiving roller speed 4500r / min to obtain electrospinned fibers. S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

[0050] The above-mentioned method for preparing anti-scratch water-based coating includes the following steps: first, the water-based polyurethane acrylate prepolymer is added to a container, and then photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent are added in sequence. Each time a reactant is added, it is stirred evenly before adding the next reactant, until all reactants are added and the mixture is stirred evenly to obtain the anti-scratch water-based coating.

[0051] The above-mentioned method for applying anti-scratch water-based coatings includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate at a coating amount of 20 g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet irradiation to obtain an anti-scratch coating.

[0052] Paint film surface performance testing: Refer to GB / T 17657—2013 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels" to test the paint film adhesion and paint film hardness of the examples and comparative examples; Table 1 Referencing GB / T 15036—2018 "Solid Wood Flooring", the abrasion resistance and stain resistance of the coating surface of coated particleboard were tested. After washing hands with clean water and drying them with a towel, keep them in a natural state (without touching any objects) for 10 minutes. Then, press firmly on the surface of the coated particleboard, remove your hands, observe the disappearance of fingerprints, and record the time. Repeat this process 5 times for the same group of specimens.

[0053] Refer to GB / T 9754—2007 "Determination of 20°, 60° and 85° specular gloss of paint films without metallic pigments" to test the 60° gloss of the test specimens, with 5 tests per group of specimens.

[0054] Table 2 Surface abrasion resistance / (g / 100r) Surface stain resistance Fingerprint disappearance time / s 60° gloss / ° Example 1 0.0038 No stain trace 14 55.9 Example 2 0.0042 No stain trace 15 54.7 Example 3 0.0034 No stain trace 14 56.1 Example 4 0.0037 No stain trace 16 55.2 Example 5 0.0033 No stain trace 15 55.6 Comparative Example 1 0.0038 No stain trace 28 5.5 Comparative Example 2 0.0043 No stain trace 32 53.3 Comparative Example 3 0.0085 No stain trace 20 49.8 Comparative Example 4 0.0092 No stain trace 29 38.9 Comparative Example 5 0.0044 No stain trace 43 25.5° As can be seen from Table 2, the coating prepared by this invention possesses anti-fingerprint properties. After adding photo-induced shrinkage short-cut fibers and undergoing photothermal curing, fingerprints can completely disappear, and the fingerprint duration is short, demonstrating excellent anti-fingerprint effects. After photothermal curing, the coating surface forms wrinkles and ripples, which not only achieve a skin-feeling effect but also facilitate total light scattering, making contaminants visually invisible, thus achieving both skin-feeling and anti-fingerprint effects. Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A water-based coating with anti-scratch and skin-feel properties, characterized in that, Includes the following components by weight: Waterborne polyurethane acrylate prepolymer: 30-50 parts Reactive diluent: 10-20 parts Photoinitiator: 1-2 parts Leveling agent: 0.1~0.5 parts Defoamer: 0.1~0.5 parts Photothermal shrinkage shortened fiber: 5-15 parts Micron-sized silica: 2-5 parts Water: 10-30 parts.

2. The anti-scratch skin-feel coating according to claim 1, characterized in that: The method for preparing the photo-induced shrinkage short-cut fiber includes the following steps: S11. Dissolve ODA in DMF and stir until completely dissolved. Then add PMDA in batches and stir the solution to obtain PAA solution. S12. Add 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF and stir until homogeneous to obtain a mixed solution. Add the mixed solution to PAA solution to obtain the core spinning solution. S13. Dissolve PCL in a DCM / DMF mixed solvent with a volume ratio of 7 / 3, stir to dissolve, and obtain a spinning solution; S14. Add nano-silica to the spinning solution prepared in step S13 to obtain the skin spinning solution; S15. Electrospinning the core spinning solution in S12 and the skin spinning solution prepared in S14 to obtain electrospun fibers; S16. Cut the electrospun fibers to 1-3 mm under light-protected conditions and store them in the dark.

3. The anti-scratch coating according to claim 2, characterized in that: In step S11, the mass ratio of ODA to PMDA is 1:1.05~1.1, and the concentration of the PAA solution is 10~18wt%.

4. The anti-scratch coating according to claim 2, characterized in that: In step S12, the mass-to-volume ratio of 6-[4-(4-cyanoazophenyl)phenoloxy]ethyl methacrylate to DMF is 1 g: 10-15 mL, and the volume ratio of the mixed solution to the PAA solution is 1:3-5.

5. The anti-scratch coating according to claim 2, characterized in that: The concentration of the spinning solution in step S13 is 10~15wt%.

6. The anti-scratch coating according to claim 2, characterized in that: In step S14, the mass ratio of nano-silica to spinning solution is 1:10~15.

7. The anti-scratch coating according to claim 2, characterized in that: The electrospinning parameters in step S15 are as follows: spinning voltage 15~18kV, spinning distance 12~15 cm, skin flow rate 0.5~0.8mL / h, core flow rate 0.3~0.5mL / h, and receiving roller rotation speed 4000~5000r / min.

8. The anti-scratch skin-feel coating according to claim 1, characterized in that: The waterborne polyurethane acrylate prepolymer is any one of RUW-2025B, RAW2140, and RAW9240. The reactive diluent is either 1,6-hexanediol diacrylate or trimethylolpropane triacrylate; The photoinitiator is any one of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 2,4,6-trimethylbenzoyl diphenylphosphine oxide; The leveling agent is any one or more of polydimethylsiloxane, polydimethylphenylsiloxane, or BYK-333 polyether modified polydimethylsiloxane; The defoamer is either GP-330 polyoxyethylene polyoxypropylene ether or BYK-024 polyether modified siloxane.

9. The method for preparing the anti-scratch water-based coating according to claims 1-8, characterized in that, Includes the following steps: First, add the waterborne polyurethane acrylate prepolymer to a container, then add the photoinitiator, leveling agent, defoamer, photothermal shrinkage shortened fiber, micron-sized silica, water, and reactive diluent in sequence. After each reactant is added, stir until homogeneous before adding the next reactant, until all reactants are added and the mixture is homogeneous to obtain the anti-scratch waterborne coating.

10. The application method of the anti-scratch water-based coating as described in claims 1-8, characterized in that, Includes the following steps: S1. Apply the anti-scratch, skin-feeling water-based coating to the substrate, with a coating amount of 10~25g / m². 2 The number of coating layers is unlimited; S2. The coating composition is cured by ultraviolet light irradiation; S3. After UV curing, heat curing is performed to obtain an anti-scratch coating.