Carbon-dioxide-based high-strength UV-cured nail polish and preparation method thereof

Abstract

The invention discloses carbon-dioxide-based high-strength UV-cured nail polish and a preparation method thereof. The carbon-dioxide-based high-strength UV-cured nail polish is prepared from the following raw materials: polycarbonate polyether acrylate, a reactive diluent, a photoinitiator, a brightening agent, a wetting agent and color paste, the polycarbonate polyether acrylate is obtained by addition polymerization of the following raw materials in parts by mass: 80-100 parts of polycarbonate polyether polyol, 20-40 parts of an isocyanate compound and 20-40 parts of an acrylate monomer; according to the invention, polycarbonate polyether polyol is taken as a raw material, a carbonic ester chain is introduced into the nail polish, and excellent high strength of the polycarbonate polyether polyol is combined with UV curing, so that the UV-curable nail polish formula which is high in strength, safe and pollution-free is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and in particular to a carbon dioxide-based high-strength UV-curing nail polish and a preparation method thereof. Background Art

[0002] Nail polish, also known as nail polish glue, is a cosmetic used to decorate nails. It protects and beautifies nails by applying a layer of wear-resistant, scratch-resistant, glossy coating resin on the surface of the nails. It is one of the cosmetics favored by women and can be divided into solvent-based nail polish and water-based nail polish.

[0003] With the advent of UV curing technology, UV-curable nail polish was born, and it is now the most widely used nail polish. Simultaneously, the development of water-based resins has also led to the emergence of this healthy and environmentally friendly nail polish on the market. Nail polish is primarily composed of three parts: a base coat, a middle coat, and a top coat. The base coat primarily serves to fix and protect the surface, requiring good adhesion and minimal heat release during curing. The middle coat, which primarily colors and shapes the surface, needs to be applied evenly to ensure a uniform film and a good gloss after curing. The top coat, as the outermost layer of UV-curable nail polish, seals and protects the middle coat and offers excellent wear resistance and gloss.

[0004] Traditional nail polish formulas contain a large proportion of organic solvents. This can lead to scratches or dents on the polished, polished surface, which lacks aesthetic appeal and requires immediate polishing and a fresh coat of polish. This can seriously damage the nails themselves, and repeated application of the volatile organic solvents in nail polish can also negatively impact health.

[0005] In order to solve the above-mentioned problems caused by excessive organic solvents in the nail polish formula and weak strength after curing. Water-based polyurethane or water-based acrylate has appeared on the market as the resin component of nail polish. This resin uses water as a solvent and can effectively solve the health problems during use. However, because it is water-soluble and mostly uses polyester or polyether polyols, the film layer of the nail after curing is easy to fall off and the strength is not enough for long-term use, and it still needs to be reapplied. At the same time, UV-cured nail polish has also appeared on the market. This nail polish is simple to use, and the curing method is convenient, safe, and pollution-free, and it can also effectively solve the problem of harm to the human body. However, since the current types of resins are relatively few that are suitable for the high strength of nail polish, they cannot meet daily needs, and the nail surface after scratching still needs to be further repaired.

[0006] Chinese patent CN102228411A discloses a two-in-one water-soluble nail film solution that addresses the issues of slow curing time and weather resistance, but mentions less about strength. U.S. Patent US20020010226A1 discloses a UV-curing nail polish with good adhesion and high gloss, but does not mention wear resistance or weather resistance. Summary of the Invention

[0007] To address the problem of insufficient strength of UV-curable nail polish, the present invention provides a carbon dioxide-based high-strength UV-curable nail polish and a preparation method thereof. Polycarbonate polyether polyol is used as a raw material, carbonate ester chains are introduced into the nail polish, and the excellent high strength thereof is combined with UV curing to obtain a high-strength, safe, and pollution-free UV-curable nail polish formula.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A carbon dioxide-based high-strength UV-curable nail polish comprising the following raw materials: polycarbonate polyether acrylate, a reactive diluent, a photoinitiator, a brightener, a wetting agent, and a color paste;

[0010] The polycarbonate polyether acrylate is obtained by polymerization of the following raw materials:

[0011] Calculated by mass, the polycarbonate polyether polyol comprises 80-100 parts, the isocyanate compound comprises 20-40 parts, and the acrylate monomer comprises 20-40 parts.

[0012] The polycarbonate polyether polyol has a hydroxyl value of 56-72 mgKOH / g, a carbonate bond to ether bond ratio of 0.375-0.84:1, and a viscosity of 9000-12000 mPa·s at 70°C.

[0013] The present invention reacts a polycarbonate polyether polyol, an isocyanate compound, and an acrylate monomer to produce a polycarbonate polyether acrylate macromonomer, which serves as a light-curing resin component and is mixed with a reactive diluent monomer to produce a UV-curable nail polish. A suitable amount of photoinitiator is added to produce a UV-cured product through free radical initiation. The present invention introduces carbonate segments through molecular design to increase the crosslinking density, resulting in a high-strength, safe, and non-toxic UV-curable nail polish. Furthermore, the addition of the isocyanate compound introduces urethane bonds that facilitate hydrogen bonding between the molecular chains, further enhancing the material's strength. The polyol used in the present invention is a polycarbonate polyether polyol, which has strong polarity between its molecular chains, imparting excellent mechanical properties. Furthermore, the incorporation of acrylate bonds satisfies the requirements of light-curing. Compared to the natural curing method of traditional nail polish, this is safe, environmentally friendly, and non-irritating, organic solvent-free, and convenient curing method.

[0014] The polycarbonate polyether polyol is Hefei Puli's bio-free PCE-220S. This aromatic structure allows for a rapid viscosity increase in prepolymers, resulting in higher strength in finished products.

[0015] The preparation of the polycarbonate polyether acrylate comprises: subjecting polycarbonate polyether polyol, isocyanate compound and acrylate monomer to addition reaction at 80-120° C. for 2-6 hours.

[0016] The isocyanate compound is one or a combination of two or more of diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate or toluene diisocyanate. Among them, isophorone diisocyanate is preferred. Isocyanate has an aliphatic ring structure, which enhances mechanical strength and also has yellowing resistance due to the absence of an aromatic structure.

[0017] The acrylic acid ester monomer is one or a combination of two or more of hydroxymethyl acrylate, hydroxyethyl acrylate, n-butyl methacrylate, hydroxyisobutyl methacrylate, hydroxyn-butyl acrylate, hydroxymethyl methacrylate, hydroxyethyl methacrylate, hydroxyisopropyl methacrylate, hydroxyisooctyl acrylate, or acryloylmorpholine. Hydroxyethyl acrylate is preferred due to its high reactivity and low molecular weight, which helps enhance the mechanical properties of the product.

[0018] The high-strength UV-curing nail polish comprises the following raw materials in parts by mass: 80-100 parts of polycarbonate polyether acrylate, 20-30 parts of reactive diluent, 1-5 parts of photoinitiator, 0.001-0.005 parts of brightener, 0.001-0.005 parts of wetting agent, and 0.01-0.05 parts of color paste.

[0019] The reactive diluent includes one or a combination of two or more of hydroxymethyl acrylate, ethyl acrylate, n-butyl methacrylate, isobutyl methacrylate, n-butyl acrylate, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, isooctyl acrylate, or acryloylmorpholine. Acryloylmorpholine is preferred because it can act as a crosslinking agent, form a three-dimensional network structure, and enhance the mechanical properties of the product.

[0020] The photoinitiator includes one or a combination of two or more of 2-hydroxy-2-methyl-1-phenylpropanone, 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphonate, or methyl benzoylformate. 2,4,6-trimethylbenzoyl-diphenylphosphine oxide is preferred because it is highly active and generates a high amount of free radicals under photoinitiation, which is beneficial to the photocuring reaction.

[0021] The brightener includes one or a combination of two or more of dimethyl silicone oil, methyl methacrylate-based silicone oil, cobalt phthalocyanine, cobalt phthalocyanine amide or silica; methyl methacrylate-based silicone oil is preferred because it has a good brightening effect, a regular structure, reduces surface tension, and is well compatible with other acrylic monomers.

[0022] The wetting agent includes one or a combination of two or more of sodium butylnaphthalenesulfonate, 2-morpholineethanesulfonic acid, dodecylbenzenesulfonic acid, sodium ligninsulfonate, sodium lauryl sulfate, sodium lauryl polyoxyethylene ether sulfate, potassium oleate, isooctyl palmitate, myristyl myristate or isostearamidopropylmorpholine lactate; dodecylbenzenesulfonic acid is preferred; the wetting effect is good, not only can it effectively wet the substrate, but also can enhance the mechanical properties of the product.

[0023] The color paste is bright red.

[0024] The present invention also provides a method for preparing the carbon dioxide-based high-strength UV-curing nail polish, comprising the steps of mixing and stirring raw materials including polycarbonate polyether acrylate, a reactive diluent, a photoinitiator, a brightener, a wetting agent and a color paste, and then vacuum drying.

[0025] The present invention also provides a polycarbonate polyether acrylate, which is obtained by an addition reaction of the following raw materials: 80-100 parts by weight of a polycarbonate polyether polyol, 20-40 parts by weight of an isocyanate compound, and 20-40 parts by weight of an acrylate monomer; the polycarbonate polyether polyol has a hydroxyl value of 56-72 mgKOH / g, a ratio of carbonate bonds to ether bonds of 0.375-0.84:1, and a viscosity of 9000-12000 mPa·s at 70°C.

[0026] The molecular weight of the polycarbonate polyether acrylate is 2000-3000 Da.

[0027] The stirring and mixing process can be carried out at room temperature. The raw materials are mixed evenly for about 2-15 minutes, and then vacuum dried to remove bubbles before use.

[0028] The UV-curable nail polish of the present invention exhibits excellent wear resistance, durability, and pencil hardness after curing. Commercially available UV-curable nail polishes have a wear resistance of 70, exhibit some wear loss, and a pencil hardness of 5B. In comparison, the UV-curable nail polish of the present invention exhibits a wear resistance of over 90, exhibits no wear loss, and has a pencil hardness of 2B, demonstrating excellent strength.

[0029] The UV-curable nail polish of the present invention has excellent gloss after curing. Commercially available UV-curable nail polishes have a gloss test of only 85 under the same conditions with incident light at 60 degrees. However, the UV-curable nail polish of the present invention has a surface gloss test of over 90 after curing, demonstrating excellent gloss.

[0030] The UV-curable nail polish of the present invention is safe, environmentally friendly, pollution-free, and has a fast curing speed. Most commercially available UV-curable nail polishes use relatively high amounts of organic solvents, which are harmful to the human body and have a slow volatilization rate, polluting the environment. The UV-curable nail polish of the present invention not only uses degradable carbon dioxide-based polycarbonate polyether polyols in its formulation, but also has a safe and environmentally friendly curing method, curing within 3 seconds. Overall, it is superior to commercially available UV-curable nail polishes.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention introduces carbonate segments through molecular design to improve its cross-linking density and polarity. The introduced urethane bonds in the isocyanate compound easily form hydrogen bonds between the molecular chains, further improving its strength. The acrylate bonds are connected to meet the needs of light curing. Compared with the natural curing method of traditional nail polish, it has the advantages of being safe, green, and non-irritating organic solvent volatilization, and ultimately obtains a UV-cured nail polish that is high in strength, excellent in wear resistance and fastness, good in gloss, and safe and non-toxic. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 : This is the NMR spectrum of the polycarbonate polyether acrylate synthesized in the examples.

[0034] Figure 2 This is the GPC chart of the polycarbonate polyether acrylate synthesized in the examples.

[0035] Figure 3 This is a tensile test diagram of the nail polish after curing in the embodiment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with embodiment. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Those skilled in the art will make modifications or equivalent substitutions based on understanding the technical solution of the present invention, without departing from the spirit and scope of the technical solution of the present invention, and all should be encompassed within the protection scope of the present invention.

[0037] The raw materials used in the following specific embodiments are all purchased from the market. The polycarbonate polyether polyol used in the examples has a molecular weight Mn of 2000-3000, a brand name PCE-220S, and a viscosity of about 11000 mPa·s at 70°C. It is a commercial product of Hefei Puli Advanced Materials Technology Co., Ltd.

[0038] Example 1

[0039] A carbon dioxide-based high-strength UV-curable nail polish comprising the following components: 8 g of polycarbonate polyether acrylate, 2 g of acryloylmorpholine, 0.1 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.0001 g of dimethyl silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste;

[0040] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 8g of polycarbonate polyether polyol, 2g of isophorone diisocyanate, and 2g of hydroxyethyl acrylate;

[0041] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0042] Step 1: 8g of polycarbonate polyether polyol was heated and stirred continuously for reaction, and vacuum dehydration was performed in advance. 2g of isophorone diisocyanate was dissolved in 50g of toluene solution, placed in a three-necked flask filled with nitrogen atmosphere, heated and stirred at 85°C for 4h, and then 2g of hydroxyethyl acrylate was added. The mixture was heated and stirred at 85°C for 4h. After cooling to room temperature, the product was precipitated with ethyl acetate. After standing, the supernatant was poured out, and 20ml of acetone was added to dissolve it. All solvents were removed by rotary evaporation to obtain polycarbonate polyether acrylate. The yield was 96.8%. The NMR spectrum of the synthesized polycarbonate polyether acrylate is shown as follows: Figure 1 As shown, the three compounds have achieved addition polymerization through analysis, and the product GPC is as follows Figure 2 As shown, the molecular weight is 2781.

[0043] Step 2: 8 g of the polycarbonate polyether acrylate prepared above, 2 g of acryloylmorpholine, 0.1 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.0001 g of dimethyl silicone oil, 0.0001 g of dodecylbenzenesulfonic acid and 0.001 g of bright red paste were stirred and mixed evenly, and the bubbles were removed in vacuo for 20 minutes to obtain UV-curable nail polish.

[0044] Step 3: Apply UV-curable nail polish on the surface of a clean glass substrate and irradiate it with a 40W UV lamp for 3 seconds to obtain a carbon dioxide-based high-intensity UV-curable nail polish cured product A1.

[0045] Example 2

[0046] A carbon dioxide-based high-strength UV-curable nail polish, comprising the following components: 10 g of polycarbonate polyether acrylate, 2 g of acryloylmorpholine, 0.1 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.0001 g of dimethyl silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste;

[0047] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 8g of polycarbonate polyether polyol, 2g of hexamethylene diisocyanate, and 2g of hydroxypropyl acrylate;

[0048] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0049] Step 1: 8 g of polycarbonate polyether polyol and 2 g of hexamethylene diisocyanate were dissolved in 50 g of petroleum ether solution, placed in a three-necked flask with a nitrogen atmosphere, heated and stirred at 90 ° C for 4 h, and then 2 g of hydroxyethyl acrylate was added. The mixture was heated and stirred at 90 ° C for 6 h. After cooling to room temperature, the product was precipitated with ethyl acetate. After standing, the supernatant was poured out, and 20 ml of acetone was added to dissolve it. All solvents were removed by rotary evaporation to obtain polycarbonate polyether acrylate with a yield of 94.6%. The GPC data are as follows: Figure 2 shown.

[0050] Step 2: 10 g of the polycarbonate polyether acrylate prepared above, 2 g of acryloylmorpholine, 0.1 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.0001 g of dimethyl silicone oil, 0.0001 g of dodecylbenzenesulfonic acid and 0.001 g of bright red paste were stirred and mixed evenly, and the bubbles were removed in vacuo for 20 minutes to obtain UV-curable nail polish.

[0051] Step 3: Apply UV-curable nail polish on the surface of a clean glass substrate and irradiate it with a 40W UV lamp for 3 seconds to obtain a carbon dioxide-based high-intensity UV-curable nail polish cured product A2.

[0052] Example 3

[0053] A carbon dioxide-based high-strength UV-curable nail polish, comprising the following components: 10 g of polycarbonate polyether acrylate, 2 g of isooctyl acrylate, 0.1 g of 2-hydroxy-2-methyl-1-phenylpropanone, 0.0001 g of methyl methacrylate-based silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste;

[0054] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 8g of polycarbonate polyether polyol, 2g of toluene diisocyanate, and 2g of hydroxypropyl acrylate;

[0055] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0056] Step 1: 8 g of polycarbonate polyether polyol and 2 g of toluene diisocyanate were dissolved in 50 g of acetone solution, placed in a three-necked flask filled with nitrogen atmosphere, heated and stirred at 90 ° C for 4 h, and then 2 g of hydroxyethyl acrylate was added. The mixture was heated and stirred at 90 ° C for 6 h. After cooling to room temperature, the product was precipitated with ethyl acetate. After standing, the supernatant was poured out, and 20 ml of acetone was added to dissolve it. All solvents were removed by rotary evaporation to obtain polycarbonate polyether acrylate with a yield of 97.9%. GPC data are as follows: Figure 2 .

[0057] Step 2: 10 g of the polycarbonate polyether acrylate prepared above, 2 g of isooctyl acrylate, 0.5 g of 2-hydroxy-2-methyl-1-phenylpropanone, 0.0001 g of methyl methacrylate-based silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste were stirred and mixed evenly, and the bubbles were removed under vacuum for 20 minutes to obtain UV-curable nail polish. The UV-curable nail polish was applied to the surface of a clean glass substrate and irradiated with a 40 W UV lamp for 3 seconds to obtain a carbon dioxide-based high-strength UV-curable nail polish cured product A3.

[0058] Example 4

[0059] A carbon dioxide-based high-strength UV-curable nail polish comprising the following components: 10 g of polycarbonate polyether acrylate, 4 g of n-butyl acrylate, 0.2 g of 2-hydroxy-2-methyl-1-phenylpropanone, 0.0001 g of methyl methacrylate-based silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste;

[0060] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 8g of polycarbonate polyether polyol, 2g of toluene diisocyanate, and 2g of hydroxypropyl acrylate;

[0061] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0062] Step 1: Dissolve 8g of polycarbonate polyether polyol and 2g of toluene diisocyanate in 50g of acetone solution, place in a three-necked flask filled with nitrogen atmosphere, heat and stir at 90℃ for 4h, then add 2g of hydroxyethyl acrylate, heat and stir at 90℃ for 6h, cool to room temperature, precipitate the product with ethyl acetate, let it stand, pour out the supernatant, and add 20ml of acetone to dissolve it. Rotary evaporation removes all solvents to obtain polycarbonate polyether acrylate with a yield of 95.3%. GPC data are as follows: Figure 2 .

[0063] In step 2, 10 g of the polycarbonate polyether acrylate prepared above, 4 g of n-butyl acrylate, 0.2 g of 2-hydroxy-2-methyl-1-phenylpropanone, 0.0001 g of methyl methacrylate-based silicone oil, 0.0001 g of dodecylbenzenesulfonic acid, and 0.001 g of bright red paste were stirred and uniformly mixed. The mixture was then vacuum-degassing for 20 minutes to obtain a UV-curable nail polish. The UV-curable nail polish was then applied to a clean glass substrate and irradiated with a 40 W UV lamp for 3 seconds to obtain a carbon dioxide-based high-strength UV-curable nail polish cured product A4.

[0064] Example 5

[0065] A carbon dioxide-based high-strength UV-curable nail polish comprising the following components: 10 g of polycarbonate polyether acrylate, 4 g of n-butyl acrylate, 0.4 g of methyl benzoylformate, 0.0001 g of methyl methacrylate-based silicone oil, 0.001 g of sodium lignin sulfonate, and 0.001 g of bright red pulp;

[0066] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 10g of polycarbonate polyether polyol, 2g of diphenylmethane diisocyanate, and 2g of hydroxypropyl acrylate;

[0067] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0068] Step 1: Dissolve 10g of polycarbonate polyether polyol and 2g of diphenylmethane diisocyanate in 50g of acetone solution, place in a three-necked flask filled with nitrogen atmosphere, heat and stir at 90℃ for 4h, then add 2g of hydroxyethyl acrylate, heat and stir at 90℃ for 6h, cool to room temperature, precipitate the product with ethyl acetate, let it stand, pour out the supernatant, and add 20ml of acetone to dissolve it. Rotary evaporation removes all solvents to obtain polycarbonate polyether acrylate with a yield of 94.8%. GPC data are as follows: Figure 2 .

[0069] Step 2: 10 g of the polycarbonate polyether acrylate prepared above, 4 g of n-butyl acrylate, 0.4 g of methyl benzoylformate, 0.0001 g of methyl methacrylate-based silicone oil, 0.001 g of sodium lignin sulfonate, and 0.001 g of bright red pulp were stirred and mixed evenly, and the bubbles were removed in vacuo for 20 minutes to obtain UV-curable nail polish.

[0070] Step 3: Apply UV-curable nail polish on the surface of a clean glass substrate and irradiate it with a 40W UV lamp for 3 seconds to obtain a carbon dioxide-based high-strength UV-curable nail polish cured product A5.

[0071] Example 6

[0072] A carbon dioxide-based high-strength UV-curable nail polish comprising the following components: 10 g of polycarbonate polyether acrylate, 6 g of n-butyl acrylate, 0.5 g of methyl benzoylformate, 0.003 g of silicon dioxide, 0.001 g of sodium lignin sulfonate, and 0.001 g of bright red pulp;

[0073] The polycarbonate polyether acrylate is prepared from the following raw materials in parts by weight: 10g of polycarbonate polyether polyol, 2g of diphenylmethane diisocyanate, and 2g of hydroxypropyl acrylate;

[0074] The method for preparing the carbon dioxide-based high-strength UV-curable nail polish comprises the following steps:

[0075] Step 1: Dissolve 10g of polycarbonate polyether polyol and 2g of diphenylmethane diisocyanate in 50g of acetone solution, place in a three-necked flask filled with nitrogen atmosphere, heat and stir at 90℃ for 4h, then add 2g of hydroxyethyl acrylate, heat and stir at 90℃ for 6h, cool to room temperature, precipitate the product with ethyl acetate, let it stand, pour out the supernatant, and add 20ml of acetone to dissolve it. Rotary evaporation removes all solvents to obtain polycarbonate polyether acrylate with a yield of 98.8%. GPC data are as follows: Figure 2 .

[0076] Step 2: 10 g of the polycarbonate polyether acrylate prepared above, 6 g of n-butyl acrylate, 0.5 g of methyl benzoylformate, 0.003 g of silicon dioxide, 0.001 g of sodium lignin sulfonate and 0.001 g of bright red pulp were stirred and mixed evenly, and the bubbles were removed in vacuo for 20 minutes to obtain UV-curable nail polish.

[0077] Step 3: Apply UV-curable nail polish on the surface of a clean glass substrate and irradiate it with a 40W UV lamp for 3 seconds to obtain a carbon dioxide-based high-intensity UV-curable nail polish cured product A6.

[0078] Comparative Example 1

[0079] Preparation of commercial polyester UV-curable nail polish (B1): Apply commercial UV-curable nail polish on a clean glass substrate and irradiate with a 40W UV lamp for 10 seconds to obtain a carbon dioxide-based high-intensity UV-curable nail polish cured product B1.

[0080] Curing time test method: Place the prepared UV-curable nail polish in a 100ml beaker. Place the beaker in a vacuum oven (model LC-DZF-6090AB, power 1400W) for 10 minutes to remove any bubbles that may have formed during stirring. Pour the nail polish into a 5mm x 5mm x 2mm polyvinyl fluoride mold until the level of the polish is aligned with the mold surface, adding approximately 20g of polish. Curing is performed using a dedicated UV lamp (model M5-105, power 42W, wavelength 362nm). Use an electronic stopwatch to record the time. Once the surface solidifies, record the time and turn off the UV lamp.

[0081] Abrasion resistance test method: The prepared UV-curing nail polish is cut into pieces with a diameter of 100 mm according to the test standard. The grinding wheel is pressed vertically on the edge of the sample with a spacing of about 16 mm. The speed is set to 70 r / min, the number of frictions is 100, and the load is 1000 g. After the test, the test surface is observed for wear to obtain the data.

[0082] Fastness test: Wipe the surface of the glass slide with ethyl acetate. After the surface of the glass slide is dry, use a homemade brush to apply the prepared UV-curing nail polish sample to the dry surface of the glass slide. Place it in a fume hood for 24 hours. Use a No. 9 embroidery needle to make 5 lines of grids at intervals of 1 mm, and then make 5 more lines vertically. Observe the edge lifting and record the data.

[0083] Pencil hardness test: The prepared UV-curable nail polish was coated on a clean glass slide according to the test standard, and the hardness was tested using an electric pencil hardness tester.

[0084] Gloss test: The prepared UV-curable nail polish was tested using a REFO 60 60° gloss meter according to the standard GB / T 23999-2009.

[0085] Water resistance test: Pour the prepared UV-curable nail polish into a clean PTFE mold and cure it with a UV lamp. Then cut the cured product into 2.5 cm × 2.5 cm pieces and immerse them in deionized water. Then wipe off the surface moisture and observe whether the film falls off.

[0086] The cured products prepared in Examples 1-6 and Comparative Example 1 were tested for properties such as abrasion resistance, firmness, pencil hardness, glossiness, and water resistance. The results are shown in Table 1 below.

[0087] Table 1 Test performance of UV curing materials with different formulations

[0088]

[0089]

[0090] As shown in Table 1, Examples 1-6 are superior to Comparative Example 1 in terms of abrasion resistance, fastness, pencil hardness, and glossiness, and are also outstanding in terms of curing time and water resistance. In summary, the performance of the UV-curable nail polish of the present invention has great application value.

[0091] The cured nail polish was also subjected to tensile testing using an INSTRON-3344 electronic universal tensile testing machine from Instron, USA. The tensile test speed was 5 mm / min. Dumbbell-shaped samples were prepared according to the national standard GB / T1040.2 / 2006. Five samples were tested and the average value was taken. The results are as follows: Figure 3 As shown, it can be seen that the tensile strength of the nail polish prepared in the present invention is as low as 18 MPa and as high as 25 MPa or more, which is much higher than the standard 5 MPa. The present invention has excellent mechanical strength.

[0092] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A carbon dioxide-based high-strength UV-curable nail polish, characterized in that: The raw materials include: polycarbonate polyether acrylate, reactive diluent, photoinitiator, brightener, wetting agent and color paste; The polycarbonate polyether acrylate is obtained by addition polymerization of the following raw materials: 80-100 parts by weight of polycarbonate polyether polyol, 20-40 parts by weight of isocyanate compound, and 20-40 parts by weight of acrylate monomer; The polycarbonate polyether polyol has a hydroxyl value of 56-72 mgKOH / g, a carbonate bond to ether bond ratio of 0.375-0.84:1, and a viscosity of 9000-12000 mPa·s at 70°C.

2. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The polycarbonate polyether polyol is Hefei Puli Bio-free PCE-220S.

3. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The preparation of the polycarbonate polyether acrylate comprises: subjecting polycarbonate polyether polyol, isocyanate compound and acrylate monomer to addition reaction at 80-120° C. for 2-6 hours.

4. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The isocyanate compound is one or a combination of two or more of diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate or toluene diisocyanate.

5. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The acrylic acid ester monomer is one or a combination of two or more of hydroxymethyl acrylate, hydroxyethyl acrylate, n-butyl methacrylate, hydroxyisobutyl methacrylate, hydroxyn-butyl acrylate, hydroxymethyl methacrylate, hydroxyethyl methacrylate, hydroxyisopropyl methacrylate, hydroxyisooctyl acrylate or acryloylmorpholine.

6. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The high-strength UV-curing nail polish comprises the following raw materials in parts by mass: 80-100 parts of polycarbonate polyether acrylate, 20-30 parts of reactive diluent, 1-5 parts of photoinitiator, 0.001-0.005 parts of brightener, 0.001-0.005 parts of wetting agent, and 0.01-0.05 parts of color paste.

7. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The reactive diluent includes one or a combination of two or more of hydroxymethyl acrylate, ethyl acrylate, n-butyl methacrylate, isobutyl methacrylate, n-butyl acrylate, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, isooctyl acrylate or acryloylmorpholine.

8. The carbon dioxide-based high-strength UV-curable nail polish according to claim 1, characterized in that The photoinitiator includes one or a combination of two or more of 2-hydroxy-2-methyl-1-phenylpropanone, 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, ethyl 2,4,6-trimethylbenzoylphenylphosphonate or methyl benzoylformate; The brightening agent includes one or a combination of two or more of dimethyl silicone oil, methyl methacrylate silicone oil, cobalt phthalocyanine, cobalt phthalocyanine amide or silicon dioxide; The wetting agent includes one or a combination of two or more of sodium butylnaphthalenesulfonate, 2-morpholineethanesulfonic acid, dodecylbenzenesulfonic acid, sodium ligninsulfonate, sodium lauryl sulfate, sodium lauryl polyoxyethylene ether sulfate, potassium oleate, isooctyl palmitate, myristyl myristate or isostearamidopropyl morpholine lactate; The color paste is bright red.

9. The method for preparing a carbon dioxide-based high-strength UV-curable nail polish according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: mixing and stirring raw materials including polycarbonate polyether acrylate, active diluent, photoinitiator, brightener, wetting agent and color paste, and then vacuum drying.

10. A polycarbonate polyether acrylate, characterized in that The invention is obtained by addition polymerization of the following raw materials: 80-100 parts by weight of polycarbonate polyether polyol, 20-40 parts by weight of isocyanate compound, and 20-40 parts by weight of acrylate monomer; The polycarbonate polyether polyol has a hydroxyl value of 56-72 mgKOH / g, a carbonate bond to ether bond ratio of 0.375-0.84:1, and a viscosity of 9000-12000 mPa·s at 70°C.

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