UV skin-touch coating

Abstract

The invention belongs to the technical field of UV skin-touch coatings, and particularly relates to a UV skin-touch coating which comprises 42-55 parts of resin, 8-18 parts of a reactive diluent, 3-5 parts of a UV initiator, 4-12 parts of a skin-touch assistant, 0.5-8 parts of a functional assistant and the balance of deionized water. The resin and the reactive diluent are mixed and stirred to be transparent, the UV initiator and the functional additive are added, after dispersing, stirring and filtering, the surface of the base material is coated with the resin and the reactive diluent, UV curing is conducted, the coating amount is 40-100 g / m < 2 >, the UV curing energy is 600-1200 mJ / cm, and the time is 15-30 s.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of UV skin feel coatings, and particularly relates to a UV skin feel coating. BACKGROUND

[0002] The UV skin feel coating has been widely applied to many fields such as home board, electronic device shell, decorative panel, outdoor furniture and medical equipment due to the advantages of fast curing speed, low VOC emission and delicate touch, and has become a popular development direction in the coating industry. However, the existing UV skin feel coating generally has the problems of single function and poor substrate adaptability, most products are difficult to simultaneously consider skin feel experience and core performances such as wear resistance, antibacterial property, stain resistance and self-repairing, and the performance is insufficient in special requirement scenes such as low temperature curing, yellowing resistance and biocompatibility, so the UV skin feel coating cannot meet diversified application requirements.

[0003] In the sub-scene of home, electronics, medical treatment and environmental protection packaging, the shortcomings of the existing products are particularly prominent: the coating for home board is easy to be hard and brittle and breed bacteria; the coating for electronic device shell has insufficient wear resistance and stain resistance and slight scratches are difficult to repair; the heat-sensitive substrate is easy to be deformed in the curing process; the coating for outdoor use has poor weather resistance and is easy to yellow; there is a lack of degradable bio-based product in the field of environmental protection packaging; and the coating for medical equipment is difficult to meet the requirements of high antibacterial property, antiviral property and biocompatibility, which seriously limits the application range and market expansion of the UV skin feel coating. SUMMARY

[0004] The application aims at the above-mentioned technical problems and provides a UV skin feel coating.

[0005] Therefore, the application provides a UV skin feel coating, which comprises the following steps:

[0006] The UV skin feel coating comprises 42-55 parts of resin, 8-18 parts of active diluent, 3-5 parts of UV initiator, 4-12 parts of skin feel aid and 0.5-8 parts of functional aid, and the rest is deionized water.

[0007] The preparation process comprises the following steps: the resin and the active diluent are mixed and stirred until transparent, the UV initiator and the functional aid are added, and then the mixture is dispersed, stirred and filtered, and then coated on the surface of a substrate and subjected to UV curing, the coating amount is 40-100 g / m2, the UV curing energy is 600-1200 mJ / cm2, and the time is 15-30 s.

[0008] Preferably, the resin is selected from one of a polyurethane acrylate resin, a silicone-modified polyurethane acrylate resin, an oligomer acrylate resin, a high-gloss polyurethane acrylate resin, a polylactic acid-based acrylate resin, a fluorine-modified polyurethane acrylate resin, a conductive polyurethane acrylate resin and an elastic polyurethane acrylate resin.

[0009] Preferably, the reactive diluent is selected from at least one of trimethylolpropane triacrylate, dipentaerythritol hexaacrylate, isoborneol methacrylate, tripropylene glycol diacrylate, isooctyl acrylate, ethoxylated trimethylolpropane triacrylate, glyceryl triacrylate, polyethylene glycol diacrylate, hydroxypropyl acrylate, and hydroxyethyl methacrylate.

[0010] Preferably, the UV initiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, methyl benzoylformate, dimethyl benzoate, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-1-propanone, camphorquinone, and low-migration initiators, and the mass ratio is 1:1 when they are used in combination.

[0011] Preferably, the skin-feeling additive is selected from one of the following: polyether modified silicone resin, polytetrafluoroethylene wax powder, polysiloxane wax emulsion, silicone modified acrylate, polysiloxane modified polylactic acid, polytetrafluoroethylene / silica composite wax powder, silicone skin-feeling agent, and polysiloxane elastomer.

[0012] Preferably, the functional additives include at least one of the following: antibacterial agents, wear-resistant fillers, self-healing accelerators, antifouling additives, low-temperature accelerators, UV absorbers, light stabilizers, conductive fillers, toughening agents, color pastes, antibacterial and antiviral agents, antifungal agents, and antibacterial additives.

[0013] Among them, the antibacterial agent is one of nano-silver / zinc oxide composite antibacterial agent and plant extract; the wear-resistant filler is one of nano-alumina and nano-cellulose; the self-healing promoter is polycaprolactone glycol; the antifouling agent is one of fluorinated polysiloxane and fluorocarbon surfactant; the low-temperature promoter is an amine derivative; the UV absorber is one of 2-phenylbenzimidazole-5-sulfonic acid and benzotriazole; the light stabilizer is a hindered amine; the conductive filler is carbon nanotube; the toughening agent is polyurethane elastic particles; the color paste is a compound of nano-sized color powder, dispersant, and diluent, accounting for 5-8% of the total mass; the antibacterial and antiviral agent is a silver ion / graphene oxide composite agent; the antifungal agent is chlorhexidine; and the antibacterial agent is quaternary ammonium salt modified montmorillonite.

[0014] Preferably, in the preparation process, the mixing temperature is room temperature to 60°C, and the time is 20-30 min; the high-speed dispersion speed is 1500-2500 r / min, and the time is 25-40 min.

[0015] Ultrasonic dispersion power 300-400W, time 25-40min; low-speed stirring speed 500-800r / min, time 15-25min; filtration using 200-300 mesh filter.

[0016] Preferably, the substrate pretreatment includes at least one of sanding, dust removal, primer coating, plasma treatment, corona treatment, aseptic treatment, polishing, and rust removal; the substrate is selected from one of furniture board, PC / ABS alloy, heat-sensitive substrate, tempered glass, acrylic, biodegradable PLA film, aluminum alloy / anticorrosive wood, ITO conductive glass / PC panel, silicone / rubber / soft PVC, MDF, stainless steel / medical plastic.

[0017] Preferably, the UV curing wavelength is 365nm or 395nm, and the curing temperature is ≤40℃; some systems require one of the following post-treatments after curing: constant temperature curing at 40℃ for 2 hours, natural cooling to room temperature, artificial accelerated aging pretreatment, or grinding and polishing.

[0018] The beneficial effects of this invention are as follows: Addressing the core pain points of different application scenarios, this invention achieves a deep integration of skin-feel experience and specialized performance through precise formulation system design and functional component compounding. The home-use version solves the problems of hardness, brittleness, and susceptibility to bacterial growth; the electronic device version overcomes the challenges of repairing wear, stains, and scratches; the heat-sensitive substrate version avoids the risk of deformation during the curing process; and the medical-grade version meets the requirements of high antibacterial, antiviral, and biocompatibility, breaking the current situation of traditional UV skin-feel coatings having limited functionality and scenario adaptability.

[0019] Meanwhile, the optimized preparation process of this invention balances production efficiency and product stability. Through scientific control of stirring, dispersion, and curing parameters, it ensures uniform product appearance and stable performance, meeting the needs of large-scale production. The product achieves breakthroughs in durability, weather resistance, and environmental friendliness, making it suitable for diverse application scenarios such as home furnishings, electronics, medical, and outdoor applications. It also meets environmental and safety standards, significantly expanding the application boundaries of UV skin-feel coatings and enhancing their market applicability and core competitiveness. Attached Figure Description

[0020] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0022] Implementation method 1: Ultra-soft matte antibacterial UV skin-feel coating (for home furnishing panels);

[0023] 1. Technical objective;

[0024] Solve the problems of hard and brittle feel and easy bacterial growth of furniture boards, and make it suitable for high-frequency contact scenarios such as wardrobe doors and tabletops;

[0025] Formula composition (parts by weight);

[0026] Polyurethane acrylate resin (molecular weight 8000-10000, hydroxyl value 50-60mgKOH / g): 45 parts;

[0027] Polyether-modified silicone resin (softening agent): 12 parts;

[0028] Trimethylolpropane triacrylate (TMPTA, reactive diluent): 15 parts;

[0029] 1-Hydroxycyclohexylphenyl ketone (UV initiator 184): 5 parts;

[0030] Nano silver / zinc oxide composite antibacterial agent (particle size 20-50nm): 3 parts;

[0031] Polytetrafluoroethylene wax powder (particle size 3-5μm, matte finish modifier): 4 parts;

[0032] Leveling agent (polyether-modified polysiloxane): 1.5 parts;

[0033] Antioxidant (1010): 0.5 parts;

[0034] Deionized water: Balance (≤5 parts);

[0035] Preparation process;

[0036] Mix polyurethane acrylate resin, polyether modified silicone resin, and TMPTA, and stir at 60°C for 30 minutes until transparent;

[0037] Cool to 40℃, add UV initiator 184, antibacterial agent, and wax powder, and disperse at high speed (2000r / min) for 40min;

[0038] Add leveling agent and antioxidant, stir at low speed (500r / min) for 15min, and filter (200 mesh filter) to obtain the finished product;

[0039] Substrate pretreatment (sanding → dust removal → primer), coating amount 80-100g / ㎡, UV curing (wavelength 365nm, energy 800mJ / cm², time 20s).

[0040] Performance verification;

[0041] Skin feel: Shore A hardness 35, coefficient of friction 0.10, feels "soft and delicate, without stickiness";

[0042] Antibacterial properties: Inhibition rate against Escherichia coli and Staphylococcus aureus ≥99.9%;

[0043] Durability: Taber abrasion (500g / 500 rpm) weight loss ≤0.03g, cross-cut adhesion level 1;

[0044] Appearance: Haze 70-80%, no drips or pinholes;

[0045] Implementation Method 2: Wear-resistant, stain-resistant, self-healing UV skin-feel coating (for electronic device housings);

[0046] Technical objectives;

[0047] Solve the problems of electronic device casings being "easily scratched, attracting fingerprints, and having minor scratches that cannot be repaired," and adapt to mobile phone back panels and laptop casings;

[0048] Formula composition (parts by weight);

[0049] Organosilicon-modified polyurethane acrylate resin (self-healing type, crosslinking degree 30-40%): 50 parts;

[0050] Dipentaerythritol hexaacrylate (DPHA, high abrasion resistant diluent): 10 parts;

[0051] Isoborneol methacrylate (IBOA, for reducing viscosity): 8 parts;

[0052] 2-Hydroxy-2-methyl-1-phenyl-1-propanone (UV initiator 1173): 4 parts;

[0053] Methyl benzoylformate (UV initiator BMMB): 2 parts;

[0054] Nano-alumina (particle size 10-20nm, wear-resistant filler): 6 parts;

[0055] Fluorine-modified polysiloxane (antifouling additive): 3 parts;

[0056] Polycaprolactone diol (self-repair accelerator): 5 parts;

[0057] Defoamer (silicone-based): 0.8 parts;

[0058] Preparation process: The resin is mixed with DPHA and IBOA, stirred at 50℃ for 25 min, nano alumina is added, and ultrasonically dispersed for 30 min (power 300W).

[0059] Add initiator 1173 and BMMB, stir to dissolve, then add antifouling agent, self-healing accelerator and defoamer, stir at low speed for 20 minutes;

[0060] Plasma treatment of substrate (PC / ABS alloy) surface (power 500W, time 30s), coating amount 60-70g / ㎡, UV curing (energy 1000mJ / cm², time 25s).

[0061] After curing, maintain a constant temperature of 40℃ for 2 hours to activate the self-healing function;

[0062] Performance verification; Skin feel: Coefficient of friction 0.09, press rebound rate ≥95%, "silky and elastic" feel;

[0063] Self-healing: Minor scratches of 0.5mm can be completely repaired by heating at 60℃ for 10 minutes;

[0064] Stain resistance: No residue after wiping with fingerprints or oil stains; water contact angle ≥110°.

[0065] Abrasion resistance: Taber abrasion (1000g / 1000 rpm) weight loss ≤0.02g, pencil hardness 2H;

[0066] Implementation Method 3: Low-temperature curing UV skin-feel coating (for heat-sensitive substrates);

[0067] Technical objectives;

[0068] Solve the problem of "heat deformation" during UV curing of heat-sensitive substrates (such as PVC and low-density polyethylene) and achieve rapid curing at low temperature (≤40℃);

[0069] Formula composition (parts by weight);

[0070] Oligomeric acrylate resin (glass transition temperature Tg = -20℃): 42 parts;

[0071] Tripropylene glycol diacrylate (TPGDA, low viscosity diluent): 18 parts;

[0072] Isooctyl acrylate (2-EHA, flexibility modifier): 10 parts;

[0073] Benzoin dimethyl ether (UV initiator DMPA): 3 parts;

[0074] 2-Phenylenimazole-5-sulfonic acid (UV absorber): 2 parts;

[0075] Polysiloxane wax emulsion (skin feel additive, solid content 30%): 8 parts;

[0076] Low temperature accelerator (amine derivative): 2 parts;

[0077] Antifungal agent (isothiazolinone): 0.5 parts;

[0078] Preparation process;

[0079] The resin was mixed with TPGDA and 2-EHA and stirred at room temperature for 20 minutes. Then, the initiator DMPA and the low-temperature accelerator were added and dissolved until transparent.

[0080] Add UV absorber, mildew inhibitor, and polysiloxane wax emulsion, and disperse at high speed (1500 r / min) for 30 min;

[0081] Dust removal from the substrate (PVC film) surface, coating amount 50-60g / ㎡, UV curing (wavelength 395nm, energy 600mJ / cm², temperature 35℃, time 15s).

[0082] After curing, allow it to cool naturally to room temperature to prevent substrate shrinkage;

[0083] Performance verification;

[0084] Skin feel: Shore A hardness 40, coefficient of friction 0.12, feels "soft and not stiff";

[0085] Curing adaptability: The substrate shows no deformation or discoloration, and the curing rate is ≥98%;

[0086] Weather resistance: After 1000 hours of xenon lamp aging, the color difference ΔE ≤ 1.5;

[0087] Adhesion: No tape peeling test results in no detachment; cross-cut adhesion rating is 0.

[0088] Implementation Method 4: Transparent high-gloss skin-feel coating (for decorative panels);

[0089] Technical objectives;

[0090] Breaking away from the conventional understanding that "skin feel = matte finish", it achieves "transparent high gloss + delicate skin feel", and is compatible with high-end decorative glass and acrylic panels;

[0091] Formula composition (parts by weight);

[0092] High-gloss polyurethane acrylate resin (gloss ≥95%): 55 parts;

[0093] Ethoxylated trimethylolpropane triacrylate (ETPTA, low yellowing diluent): 12 parts;

[0094] 1-Hydroxycyclohexylphenyl ketone (UV initiator 184): 4 parts;

[0095] 2-Methyl-1-[4-(methylthio)phenyl]-2-morpholino-1-propanone (UV initiator 907): 2 parts;

[0096] Organosilicon-modified acrylate (transparent skin-feeling agent): 6 parts;

[0097] Anti-yellowing agent (hindered amine): 1.5 parts;

[0098] Leveling agent (acrylate): 1 part;

[0099] Preparation process;

[0100] The resin was mixed with ETPTA and stirred at 45°C for 25 minutes. Initiators 184 and 907 were added and stirred until dissolved.

[0101] Add transparent skin feel agent, anti-yellowing agent, and leveling agent; stir at low speed (800 r / min) for 20 min; then filter (300 mesh filter).

[0102] Substrate (tempered glass) surface polishing → dust removal → coating (coating amount 70-80g / ㎡), UV curing (energy 900mJ / cm², time 25s);

[0103] After curing, gloss calibration is performed to ensure that the surface is free of glare;

[0104] Performance verification;

[0105] Skin feel: Coefficient of friction 0.11, feels "silky smooth and without graininess";

[0106] Appearance: Gloss 92-95%, light transmittance ≥90%, no haze;

[0107] Yellowing resistance: After 500 hours of UV aging, the color difference ΔE ≤ 0.8;

[0108] Adhesion: No peeling was observed in the cross-cut test (1mm spacing), adhesion level 1;

[0109] Implementation Method 5: Biodegradable bio-based UV skin-feel coating (for environmentally friendly packaging);

[0110] Technical objectives;

[0111] In response to environmental protection policies, we have developed bio-based, biodegradable UV skin-feel coatings suitable for disposable tableware, food packaging, and other applications.

[0112] Formula composition (parts by weight);

[0113] Polylactic acid acrylate resin (bio-based content ≥60%): 48 parts;

[0114] Glyceryl triacrylate (bio-based diluent): 16 parts;

[0115] Camphorquinone (biocompatible UV initiator): 3 parts;

[0116] Nanocellulose (reinforcing agent, biodegradable): 5 parts;

[0117] Polysiloxane-modified polylactic acid (skin feel modifier): 9 parts;

[0118] Plasticizer (tributyl citrate): 4 parts;

[0119] Antibacterial agent (plant extract, such as tea polyphenols): 2 parts;

[0120] Preparation process;

[0121] Polylactic acid acrylate resin and glyceryl triacrylate were mixed, stirred at 60°C for 30 min, nanocellulose was added, and ultrasonically dispersed for 25 min.

[0122] Cool to 40℃, add camphor quinone, skin feel modifier, plasticizer, and plant antibacterial agent, and stir (1200r / min) for 35min;

[0123] Corona treatment of substrate (biodegradable PLA film) surface (surface tension ≥38mN / m), coating amount 40-50g / ㎡, UV curing (energy 700mJ / cm², time 20s).

[0124] The finished product undergoes biodegradation testing to ensure compliance with GB / T20197-2006 standards;

[0125] Performance verification;

[0126] Skin feel: Shore A hardness 45, coefficient of friction 0.13, feels "warm and non-irritating";

[0127] Environmental friendliness: Biodegradation rate (composting conditions) ≥60% (180 days), VOC ≤5g / L;

[0128] Safety: Heavy metal content (Pb, Cd, etc.) ≤10mg / kg, which meets the standards for food contact materials;

[0129] Stability: No stratification or sedimentation after 6 months of storage at room temperature;

[0130] Implementation method 6: Yellowing-resistant outdoor UV skin-feel coating (for outdoor furniture).

[0131] Technical objectives;

[0132] Solve the problems of "easy yellowing and poor weather resistance" of UV skin-feel coatings in outdoor scenarios, and make it suitable for outdoor tables, chairs, sunshades, etc.

[0133] Formula composition (parts by weight);

[0134] Fluorine-modified polyurethane acrylate resin (weather-resistant): 52 parts;

[0135] Trimethylolpropane triacrylate (TMPTA): 10 parts;

[0136] 2-Hydroxy-2-methyl-1-phenyl-1-propanone (UV initiator 1173): 4 parts;

[0137] Benztriazole UV absorber (UV-327): 3 parts;

[0138] Hindered amine light stabilizer (HALS-944): 2 parts;

[0139] Polytetrafluoroethylene / silica composite wax powder (skin feel + abrasion resistance): 7 parts;

[0140] Antifouling agent (fluorocarbon surfactant): 1.5 parts;

[0141] Defoamer: 0.8 parts;

[0142] Preparation process;

[0143] The resin was mixed with TMPTA and stirred at 50°C for 25 minutes. Initiator 1173 was added and dissolved. UV absorber and light stabilizer were then added.

[0144] Add composite wax powder, antifoaming agent, and defoamer, disperse at high speed (2500r / min) for 40min, and grind until the particle size is ≤20μm;

[0145] Rust removal of substrate (aluminum alloy / anti-corrosion wood) → primer treatment → coating (coating amount 90-100g / ㎡), UV curing (energy 1200mJ / cm², time 30s);

[0146] After curing, artificial accelerated aging pretreatment is performed (xenon lamp irradiation for 200 hours).

[0147] Performance verification;

[0148] Skin feel: Coefficient of friction 0.10, feels "smooth and doesn't stick to dust";

[0149] Weather resistance: After 2000 hours of xenon lamp aging, the color difference ΔE ≤ 2.0, with no cracking or peeling;

[0150] Abrasion resistance: Taber abrasion (1000g / 2000 rpm) weight loss ≤0.05g;

[0151] Water resistance: After soaking for 72 hours, the surface showed no wrinkling or whitening.

[0152] Implementation method 7: Conductive UV skin-feel coating (for electronic touch devices);

[0153] Technical objectives;

[0154] It achieves "skin-feel + anti-static / conductive" functions, is compatible with touch panels and electronic device casings, and avoids static electricity attracting dust;

[0155] Formula composition (parts by weight);

[0156] Conductive polyurethane acrylate resin (surface resistance 10) 6 -10 8 Ω): 46 portions;

[0157] Dipentaerythritol hexaacrylate (DPHA): 14 parts;

[0158] Hydroxyethyl methacrylate (HEMA, compatibility modifier): 8 parts;

[0159] UV initiator (184+907, mass ratio 1:1): 5 parts;

[0160] Carbon nanotubes (5-10 nm diameter, conductive filler): 3 parts;

[0161] Organosilicon skin feeler (polyether modified): 6 parts;

[0162] Dispersant (ammonium polycarboxylate): 2 parts;

[0163] Antistatic agent (quaternary ammonium salt): 1.5 parts;

[0164] Preparation process;

[0165] The resin was mixed with DPHA and HEMA and stirred at 45°C for 20 minutes. Then, the dispersant and carbon nanotubes were added and ultrasonically dispersed for 40 minutes (power 400W) to ensure uniform dispersion of carbon nanotubes.

[0166] Add UV initiator, silicone skin feeler, and antistatic agent, and stir at low speed (600 r / min) for 25 min;

[0167] Substrate (ITO conductive glass / PC panel) surface cleaning → coating (coating amount 60-70g / ㎡), UV curing (energy 800mJ / cm², time 22s);

[0168] After curing, test the surface resistance to ensure uniform conductivity;

[0169] Performance verification;

[0170] Skin feel: Coefficient of friction 0.09, feels "smooth and without any roughness";

[0171] Electrical conductivity: Surface resistance 10 7 -10 8 Ω, electrostatic decay time ≤0.5s;

[0172] Touch compatibility: Does not affect touch sensitivity, light transmittance ≥85% (transparent substrate);

[0173] Adhesion: No peeling was observed in the cross-cut adhesion test, and no abnormalities were found after 5 peel tests.

[0174] Implementation Method 8: High-elasticity UV skin-feel coating (for flexible substrates);

[0175] Technical objectives;

[0176] It is compatible with soft substrates (such as silicone, rubber, and soft PVC) to achieve "high elasticity + skin feel" and solve the problems of "easy cracking and poor adhesion" of traditional coatings;

[0177] Formula composition (parts by weight);

[0178] Elastic polyurethane acrylate resin (elongation ≥300%): 53 parts;

[0179] Polyethylene glycol diacrylate (PEGDA, molecular weight 400, flexible diluent): 15 parts;

[0180] Hydroxypropyl acrylate (HPA): 7 parts;

[0181] UV initiator 184: 4 parts;

[0182] Polysiloxane elastomer (skin feel enhancer): 8 parts;

[0183] Toughening agent (polyurethane elastic particles, particle size 1-3μm): 6 parts;

[0184] Anti-aging agent (1076): 1 part;

[0185] Leveling agent: 0.6 parts;

[0186] Preparation process;

[0187] The elastic resin was mixed with PEGDA and HPA, stirred at room temperature for 30 min, toughening agent was added, and dispersed at high speed (1800 r / min) for 35 min;

[0188] Add UV initiator, polysiloxane elastomer, anti-aging agent, and leveling agent, and stir at low speed for 20 minutes;

[0189] Plasma treatment of substrate (silicone sheet) surface (time 40s), coating amount 50-60g / ㎡, UV curing (energy 700mJ / cm², time 18s).

[0190] After curing, a tensile test is performed to ensure elastic recovery.

[0191] Performance verification;

[0192] Skin feel: Shore A hardness 32, coefficient of friction 0.12, feels "soft and bouncy";

[0193] Elasticity: Elongation ≥ 280%, tensile recovery ≥ 98% (after 50% stretching);

[0194] Adhesion: No cracking or peeling was observed during the 180° bend test (5mm radius);

[0195] Aging resistance: After heat aging (80℃, 500h), the elasticity retention rate is ≥95%;

[0196] Implementation Method 9: Multi-color gradient UV skin-feel coating (for decorative building materials);

[0197] Technical objectives;

[0198] It achieves a unified "colorful gradient appearance + skin feel", adapting to background walls, decorative lines, etc., replacing the traditional "paint + film" process;

[0199] Formula composition (parts by weight, basic system + gradient colorant);

[0200] Basic system:;

[0201] Polyurethane acrylate resin: 48 parts;

[0202] TPGDA: 12 servings;

[0203] UV initiator 1173 + DMPA (mass ratio 2:1): 5 parts;

[0204] Silicone skin feeler: 5 parts;

[0205] Leveling agent: 1 part;

[0206] Gradient color paste (blended as needed, accounting for 5-8% of the total mass):

[0207] Nanoscale color powder (red / blue / gold, etc., particle size ≤100nm): 3-5 parts;

[0208] Color paste dispersant: 0.5-1 part;

[0209] Diluent (consistent with the base system): 1-2 parts;

[0210] Preparation process;

[0211] Preparation of the basic skin-feel system: Mix resin, diluent, initiator, skin-feeling agent, and leveling agent according to the formula, and stir until transparent;

[0212] Preparation of gradient color paste: Mix color powder with dispersant and diluent, and ultrasonically disperse for 30 minutes to ensure uniform dispersion of color powder;

[0213] Substrate (MDF / acrylic) surface sanding → primer → base coating system (coating amount 60g / ㎡), color paste is applied by gradient spraying with a spray gun when not fully cured (surface dry state).

[0214] Overall UV curing (energy 1000mJ / cm², time 28s), followed by sanding and polishing (2000-grit sandpaper).

[0215] Performance verification;

[0216] Skin feel: Coefficient of friction 0.11, feels "fine and without grains";

[0217] Appearance: The gradient transition is natural, with no color blocks or drips, and the skin feel is uniform and consistent;

[0218] Abrasion resistance: No color fading or loss of gloss after 50 alcohol wipings (50 times, 500g pressure);

[0219] Adhesion: Level 1 in cross-cut adhesion test, no peeling;

[0220] Implementation Method 10: Medical-grade antibacterial and antiviral UV skin-feel coating (for medical devices).

[0221] Technical objectives;

[0222] It meets the requirements of "high antibacterial, antiviral, non-irritating, and easy to clean" in medical scenarios and is compatible with medical beds, instrument shells, and protective panels.

[0223] Formula composition (parts by weight);

[0224] Medical-grade polyurethane acrylate resin (biocompatibility certified): 50 parts;

[0225] ETPTA (low-toxicity diluent): 10 parts;

[0226] UV initiator (low migration type, such as Irgacure 819): 4 parts;

[0227] Silver ion / graphene oxide composite antibacterial and antiviral agent (particle size 30-50nm): 4 parts;

[0228] Polysiloxane skin feeler (medical grade): 6 parts;

[0229] Antifungal agent (chlorhexidine): 1.5 parts;

[0230] Defoamer (medical-grade silicone): 0.5 parts;

[0231] Antibacterial adjuvant (quaternary ammonium salt modified montmorillonite): 2 parts;

[0232] Preparation process;

[0233] Medical-grade resin is mixed with ETPTA and stirred at 50°C for 25 minutes. A low-migration UV initiator is then added and dissolved until transparent.

[0234] Add compound antibacterial and antiviral agents, antifungal agents, and antibacterial adjuvants, and ultrasonically disperse for 35 minutes (power 350W) to ensure uniform distribution of the adjuvants;

[0235] Add medical-grade skin feeler and defoamer, stir at low speed for 20 minutes, and filter (using a 300-mesh sterile filter).

[0236] Aseptic treatment of substrate (stainless steel / medical plastic) surface → coating (coating amount 70-80g / ㎡), UV curing (energy 900mJ / cm², time 25s);

[0237] The finished product undergoes biocompatibility testing (cytotoxicity, skin irritation).

[0238] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A UV skin-feel coating, characterized in that: Includes the following steps: The mixture consists of 42-55 parts resin, 8-18 parts reactive diluent, 3-5 parts UV initiator, 4-12 parts skin-feeling agent, and 0.5-8 parts functional agent, with the remainder being deionized water. The preparation process includes: mixing and stirring the resin and reactive diluent until transparent, adding UV initiator and functional additives, dispersing, stirring and filtering, coating on the substrate surface and UV curing, with a coating amount of 40-100 g / m², UV curing energy of 600-1200 mJ / cm², and a time of 15-30 s.

2. The UV skin-feel coating according to claim 1, characterized in that: The resin is selected from one of the following: polyurethane acrylate resin, silicone-modified polyurethane acrylate resin, oligomeric acrylate resin, high-gloss polyurethane acrylate resin, polylactic acid-based acrylate resin, fluorine-modified polyurethane acrylate resin, conductive polyurethane acrylate resin, and elastic polyurethane acrylate resin.

3. The UV skin-feel coating according to claim 2, characterized in that: The active diluent is selected from at least one of the following: trimethylolpropane triacrylate, dipentaerythritol hexaacrylate, isobornyl methacrylate, tripropylene glycol diacrylate, isooctyl acrylate, ethoxylated trimethylolpropane triacrylate, glyceryl triacrylate, polyethylene glycol diacrylate, hydroxypropyl acrylate, and hydroxyethyl methacrylate.

4. The UV skin-feel coating according to claim 2, characterized in that: The UV initiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, methyl benzoylformate, dimethyl benzoate, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-1-propanone, camphorquinone, and low-migration initiators, and the mass ratio is 1:1 when they are used in combination.

5. The UV skin-feel coating according to claim 1, characterized in that: The skin-feeling additive is selected from one of the following: polyether modified silicone resin, polytetrafluoroethylene wax powder, polysiloxane wax emulsion, silicone modified acrylate, polysiloxane modified polylactic acid, polytetrafluoroethylene / silica composite wax powder, silicone skin-feeling agent, and polysiloxane elastomer.

6. The UV skin-feel coating according to claim 1, characterized in that: The functional additives include at least one of the following: antibacterial agents, wear-resistant fillers, self-healing accelerators, antifouling additives, low-temperature accelerators, UV absorbers, light stabilizers, conductive fillers, toughening agents, color pastes, antibacterial and antiviral agents, antifungal agents, and antibacterial additives. Among them, the antibacterial agent is one of nano-silver / zinc oxide composite antibacterial agent and plant extract; the wear-resistant filler is one of nano-alumina and nano-cellulose; the self-healing promoter is polycaprolactone glycol; the antifouling agent is one of fluorinated polysiloxane and fluorocarbon surfactant; the low-temperature promoter is an amine derivative; the UV absorber is one of 2-phenylbenzimidazole-5-sulfonic acid and benzotriazole; the light stabilizer is a hindered amine; the conductive filler is carbon nanotube; the toughening agent is polyurethane elastic particles; the color paste is a compound of nano-sized color powder, dispersant, and diluent, accounting for 5-8% of the total mass; the antibacterial and antiviral agent is a silver ion / graphene oxide composite agent; the antifungal agent is chlorhexidine; and the antibacterial agent is quaternary ammonium salt modified montmorillonite.

7. The UV skin-feel coating according to claim 1, characterized in that: In the preparation process, the mixing temperature is from room temperature to 60℃, and the time is 20-30 min; the high-speed dispersion speed is 1500-2500 r / min, and the time is 25-40 min. Ultrasonic dispersion power 300-400W, time 25-40min; low-speed stirring speed 500-800r / min, time 15-25min; filtration using 200-300 mesh filter.

8. The UV skin-feel coating according to claim 1, characterized in that: Substrate pretreatment includes at least one of sanding, dust removal, primer coating, plasma treatment, corona treatment, sterilization treatment, polishing, and rust removal; the substrate is selected from one of the following: furniture board, PC / ABS alloy, heat-sensitive substrate, tempered glass, acrylic, biodegradable PLA film, aluminum alloy / anticorrosive wood, ITO conductive glass / PC panel, silicone / rubber / soft PVC, MDF, stainless steel / medical plastic.

9. The UV skin-feel coating according to claim 1, characterized in that, The UV curing wavelength is 365nm or 395nm, and the curing temperature is ≤40℃. Some systems require one of the following post-treatments after curing: constant temperature curing at 40℃ for 2 hours, natural cooling to room temperature, artificial accelerated aging pretreatment, or grinding and polishing.

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