Epoxidized soybean oil-based acrylic resin and nail polish prepared using the same

Abstract

The invention discloses an epoxy soybean oil-based acrylic resin and a nail polish prepared using the same. The epoxy soybean oil-based acrylic resin is prepared by mixing a catalyst, a first polymerization inhibitor, a first hydroxy acrylate and a first acid anhydride, adding a second acid anhydride to continue the reaction for 0.5-3h, and finally adding epoxy soybean oil to obtain a prepolymer; the second hydroxy acrylate and diisocyanate are added to the prepolymer, and the reaction is carried out at a temperature of 30-60°C until the NCO infrared peak disappears, and the prepolymer has carbon-carbon double bonds, ester groups, epoxy groups and the like. The epoxy soybean oil-based acrylic resin is combined with a castor oil-based resin, an amine-modified polyether acrylate, a reactive diluent, a photoinitiator, a defoamer, a leveling agent, a second polymerization inhibitor, an anti-settling agent and a color paste to prepare a nail polish having good stability, excellent film-forming property, fast curing speed, good adhesion and good flexibility.

Description

Technical Field

[0001] The invention belongs to the technical field of photocurable materials and daily chemical products, and relates to an epoxy soybean oil-based acrylic resin and a preparation method thereof, as well as nail polish prepared by using the epoxy soybean oil-based acrylic resin. Background Art

[0002] Manicure is a kind of work to decorate and beautify the nails, also known as nail art design. The products used are mainly nail polish and nail polish gel. After applying nail polish or nail polish gel on the nails and irradiating them under ultraviolet light, nail polish or nail polish gel can form a thin film on the surface of the nails. This film has good gloss and is relatively strong. While giving the nails beauty, it also has a certain protective effect on the nails.

[0003] Traditional solvent-based nail polish contains a large amount of organic solvents, such as benzene, toluene, formaldehyde, acetone, ethyl acetate and alcohol, which not only contain a variety of substances harmful to the human body, but also these organic solvents are highly flammable, which can easily cause safety hazards during production and use. They are highly toxic and have significant harm to the environment and human body. Long-term use of this type of nail polish will cause the surface of the nails to become dry, brittle, and eventually lose their luster. Too frequent professional manicures will cause damage to the nail enamel, leading to problems such as paronychia and onychomycosis.

[0004] UV curing technology has advantages that traditional curing technologies cannot match, such as short curing time and low-temperature curing, and is called a new generation of green technology. As an energy-saving and environmentally friendly technology, light curing technology has been widely used in many fields such as coatings, inks, adhesives, printing plates, electronics industry, micro-machining and rapid prototyping. As part of the field involved in light curing technology, UV nail polish glue, its main components include main resin, photoinitiator and other additives, which has the characteristics of fast film formation, high gloss, low irritation and low odor. At present, the nail polish glue on the market mainly uses petroleum-based resin as the main resin. This type of main resin will have an impact on human health to a certain extent; in addition, petroleum is a non-renewable resource and is difficult to degrade and recycle, which is not in line with my country's concept of green and sustainable development. Therefore, how to use low-cost, abundant and environmentally friendly biomass resources to prepare nail polish glue has become a research hotspot.

[0005] The prior art still lacks a nail polish with high bio-based content, good flexibility, strong adhesion and good stability. Summary of the invention

[0006] The object of the present invention is to provide an epoxy soybean oil-based acrylic resin to solve at least one of the above technical problems.

[0007] Another object of the present invention is to provide a nail polish prepared using the epoxy soybean oil-based acrylic resin to solve at least one of the above technical problems.

[0008] Another object of the present invention is to provide a method for preparing the above-mentioned nail polish to solve at least one of the above-mentioned technical problems.

[0009] According to one aspect of the present invention, there is provided an epoxy soybean oil-based acrylic resin, the preparation method of which comprises the following steps:

[0010] (1) mixing a catalyst, a first polymerization inhibitor, a first hydroxy acrylate and a first acid anhydride at 90-120° C., adding a second acid anhydride and continuing to react at 90-120° C. for 0.5-3 h, and finally adding epoxidized soybean oil to obtain a prepolymer;

[0011] (2) Adding a second hydroxy acrylate and a diisocyanate to the prepolymer prepared in step (1), reacting at a temperature of 30-60° C. until the infrared peak of NCO disappears, thereby obtaining an epoxy soybean oil-based acrylic resin.

[0012] The presence of unsaturated double bonds is a necessary condition for UV curing, and the epoxy soybean oil-based acrylic resin provided by the present invention has carbon-carbon double bonds, ester groups, epoxy groups and some special groups. Therefore, when it is used to prepare nail polish, the synthesis of nail polish can be simplified and the ultraviolet lamp fast curing of the nail polish can be achieved; in addition, the addition of isocyanate increases the crosslinking density of the epoxy soybean oil-based acrylic resin, so that the raw material synthesis is more uniform.

[0013] The epoxy soybean oil-based acrylic resin provided by the invention has excellent thermal stability and mechanical properties, can meet the basic requirements of nail polish production, and can be used in preparing nail polish.

[0014] In some embodiments, the amounts of the raw materials used to prepare the epoxy soybean oil-based acrylic resin can be, by weight: 50-70 parts of the first hydroxy acrylate, 20-40 parts of the first anhydride, 10-30 parts of the second anhydride, 40-70 parts of the epoxy soybean oil, and 2-10 parts of the second hydroxy acrylate.

[0015] In some embodiments, the catalyst may be selected from at least one of amine compounds such as triethylamine, ethylenediamine, polyetheramine, polyethylenepolyamine, etc., and the amount of the catalyst may be 1-5% of the mass of the first hydroxy acrylate.

[0016] In some embodiments, the first inhibitor can be selected from at least one of BASF 264, BASF 168, BASF 1010, BASF 1076, and inhibitor 510, and its usage can be 0.1-0.5% of the total mass of the reaction materials in step (1).

[0017] In some embodiments, the diisocyanate can be selected from at least one of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, p-phenylene diisocyanate, and cyclohexane dimethylene diisocyanate, and the molar ratio of the diisocyanate to the second hydroxy acrylate is 1:(0.8-1.2).

[0018] In some embodiments, the first hydroxy acrylate and the second hydroxy acrylate may be selected from at least one of hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl acrylate.

[0019] In some embodiments, the first hydroxy acrylate and the second hydroxy acrylate are both hydroxyethyl acrylate. Therefore, hydroxyethyl acrylate can reduce the viscosity of the resin, act as a diluent, and increase fluidity; on the other hand, hydroxyethyl acrylate has a hydroxyl group and an unsaturated double bond structure that can participate in the reaction, thereby improving the curing speed and mechanical properties. Compared with other hydroxy acrylates, hydroxyethyl acrylate has a smaller molecular weight; the reaction temperature is 90-120°C, which is easier to participate in the reaction and can meet the temperature control in production.

[0020] In some embodiments, the first acid anhydride can be selected from at least one of maleic anhydride, acetic anhydride, and benzoic anhydride; the second acid anhydride can be selected from at least one of methyltetrahydrophthalic anhydride, phthalic anhydride, and trimellitic anhydride.

[0021] According to another aspect of the present invention, a nail polish is provided, comprising the following components in parts by mass: 40-60 parts of the epoxy soybean oil-based acrylic resin provided by the present invention, 10-30 parts of castor oil-based resin, 0.5-5 parts of amine-modified polyether acrylate, 20-30 parts of reactive diluent, 8-10 parts of photoinitiator, 0.1-0.5 parts of defoaming agent, 0.1-0.5 parts of leveling agent, 0.05-1.5 parts of second inhibitor, 1-5 parts of anti-settling agent and 0.1-10 parts of color paste.

[0022] In some embodiments, the reactive diluent may be selected from at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, isobornyl acrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, and 4-acryloylmorpholine (ACMO).

[0023] In some embodiments, the photoinitiator can be selected from at least one of 1-hydroxycyclohexylphenyl ketone (Irgacure-184), 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone (369), 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone (Irgacure-907), phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (819), 2-hydroxy-2-methyl-1-phenyl-1-propanone (1173), and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO).

[0024] In some embodiments, the leveling agent may be selected from at least one of Dego 270, Dego 4000, and Dego 4100.

[0025] In some embodiments, the defoaming agent may be selected from at least one of Dego 910, Dego 963, Dego 920, and Dego 921.

[0026] In some embodiments, the second polymerization inhibitor may be selected from at least one of BASF 264, BASF 168, BASF 1010, BASF 1076, and polymerization inhibitor 510.

[0027] In some embodiments, the anti-settling agent may be fumed silica.

[0028] According to another aspect of the present invention, there is provided a method for preparing nail polish, comprising the following steps:

[0029] Mix epoxy soybean oil-based acrylic resin, castor oil-based resin, amine-modified polyether acrylate and active diluent under light-proof conditions; then add photoinitiator, add defoamer, leveling agent, second inhibitor and anti-settling agent after mixing, grind with a grinder after mixing to obtain a base material; add color paste into the base material at room temperature, mix well, and obtain nail polish.

[0030] In some embodiments, the mixing may include the following steps: stirring with a stirrer at a stirring speed of 200-300 r / min and a stirring time of 20-30 min.

[0031] Specifically, the preparation method of the nail polish provided by the present invention may include the following steps:

[0032] (1) stirring an epoxy soybean oil-based acrylic resin, a castor oil-based resin, an amine-modified polyether acrylate and a reactive diluent in a light-proof manner at a temperature of 50-70° C. using a stirrer at a speed of 200-300 r / min for a time of 20-30 min to obtain a mixture I;

[0033] (2) adding a photoinitiator to the mixture I obtained in step (1), stirring the mixture with a stirrer at a temperature of 50-70° C., a stirring speed of 200-300 r / min, and a stirring time of 20-30 min to obtain a mixture II;

[0034] (3) adding a defoamer, a leveling agent, a second polymerization inhibitor and an anti-settling agent to the mixture II obtained in step (2), stirring with a stirrer at a speed of 200-300 r / min for 20-30 min, and then grinding with a grinder three times to obtain a base material;

[0035] (4) At room temperature, add the color paste to the base material prepared in step (3), and stir evenly to obtain nail polish.

[0036] Compared with the prior art, the nail polish provided by the present invention has the following advantages:

[0037] (1) The nail polish provided by the present invention is environmentally friendly, safe and healthy: it uses plant oil-based resin as a film-forming material, has a high bio-based content, good flexibility, strong adhesion and high gloss; it uses low-odor, low-irritation active monomers as diluents, and does not volatilize harmful gases.

[0038] (2) The nail polish provided by the present invention has a fast curing speed and is easy to use: it can be applied on the nails and irradiated under ultraviolet light for 30 seconds to cure. The cured nail polish can remain on the nails for a long time without falling off; it can be easily removed by applying medical alcohol to the nails for a period of time.

[0039] (3) The nail polish provided by the present invention has good storage stability: it can be stored in an oven at 80° C. for more than 7 days without agglomeration or the like.

[0040] (4) The preparation method of the nail polish provided by the present invention is simple and easy to realize industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a synthetic route for epoxy soybean oil-based acrylic resin;

[0042] Figure 2 Fourier transform infrared spectra of the epoxidized soybean oil (ESO) of Example 1 of the present invention, the prepolymer (HR) obtained in step (1), the mixture AESO in step (2), and the epoxidized soybean oil-based acrylic resin (AESO-IPDI). DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the embodiments. The embodiments are only used for explanation and are not intended to limit the present invention in any way. Unless otherwise specified, the raw materials and reagents used in the embodiments are conventional products that can be obtained commercially. For example, in the embodiments, the manufacturer of amine-modified polyether acrylate (CAS: 188012-57-9) is Kaiping Zicai Chemical Co., Ltd.; the experimental methods in the embodiments where specific conditions are not specified are usually in accordance with conventional conditions in the art or the conditions recommended by the manufacturer.

[0044] In an embodiment of the present invention, the castor oil-based resin selected is castor oil-based polyurethane acrylic resin, and its preparation method can refer to Chinese patent application 202010850894.9.

[0045] Example 1 Preparation of Epoxidized Soybean Oil-Based Acrylic Resin

[0046] The steps include:

[0047] (1) In a 500 mL three-necked flask, 1% of triethylamine in the total mass of hydroxyethyl acrylate (HEA) was used as a catalyst, 0.1% of the mass of the total reaction materials in step (1) was BASF 264, 55 g of hydroxyethyl acrylate (HEA) and 30 g of maleic anhydride were used as raw materials, and stirred at 200-300 r / min for 0.5 h at a high temperature of 100° C., 28 g of methyltetrahydrophthalic anhydride was added, and the reaction was continued for 1.5 h, and then 65 g of epoxidized soybean oil (ESO) was added to obtain a prepolymer HR;

[0048] (2) After adding 4.7 g of hydroxyethyl acrylate and 8.9 g of isophorone diisocyanate to the prepolymer in step (1), a mixture AESO was obtained, which was cooled to 45° C. and stirred at 200-300 r / min for 5 hours until the NCO infrared peak disappeared. After stirring evenly, the material was discharged to obtain an epoxy soybean oil-based acrylic resin (AESO-IPDI) with a moderate viscosity (3000-5000 [Pa.s]).

[0049] The schematic diagram of the synthesis route of the epoxy soybean oil-based acrylic resin in this embodiment is as follows: Figure 1 In other embodiments, when different diisocyanates are selected, Figure 1 R1 in the above-mentioned can be any one of hydroxyethyl acrylate semi-blocked isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, p-phenylene diisocyanate and cyclohexane dimethylene diisocyanate.

[0050] The Fourier transform infrared spectra of the epoxidized soybean oil (ESO) in this example, the prepolymer (HR) obtained in step (1), the mixture AESO in step (2), and the epoxidized soybean oil-based acrylic resin (AESO-IPDI) are shown in FIG. Figure 2 shown.

[0051] Depend on Figure 2 It can be seen that in the FT-IR spectrum of HR, after the esterification reaction, the anhydride peak disappears in the FT-IR spectrum of HR (1860cm -1 -1777cm -1 ) indicates that the prepolymer has been completely reacted. In the FT-IR spectrum of HR, 1625cm -1 The peak at 2265cm belongs to the double bond stretching vibration peak, which is mainly due to the successful embedding of ESO reaction sites. -1 After a certain period of reaction, the FT-IR spectrum of AESO-IPDI showed an infrared peak at 2265 cm-1 due to the reaction between the hydroxyl group and the isocyanate group. -1 The characteristic peak at 1525 cm disappeared, indicating that the prepolymer HR obtained in step (1) has completely reacted with the isocyanate. In addition, the FT-IR spectrum of AESO-IPDI showed a peak at 1525 cm -1 The peak at is the amide vibration peak of the -NHCOO- group, which further indicates that isocyanate was successfully introduced.

[0052] Example 2 Preparation of Epoxidized Soybean Oil-Based Acrylic Resin

[0053] The steps include:

[0054] (1) In a 500 mL three-necked flask, 3% of the total mass of hydroxyethyl acrylate (HEA) in triethylamine is used as a catalyst, 0.3% of the total mass of the reaction materials in step (1) in BASF 1076, 50 g of hydroxyethyl acrylate (HEA) and 26 g of maleic anhydride are used as raw materials, and stirred at 200-300 r / min at a high temperature of 90° C. for 2 h, and then 30 g of methyltetrahydrophthalic anhydride is added, and the reaction is continued for 1.5 h, and then 50.6 g of ESO is added to obtain a prepolymer;

[0055] (2) After adding 4.2 g of hydroxyethyl methacrylate and 8 g of toluene diisocyanate to the prepolymer in step (1), the temperature was lowered to 50° C. and stirred at 200-300 r / min for 4 hours until the NCO infrared peak disappeared. After stirring evenly, the material was discharged to obtain an epoxy soybean oil-based acrylic resin with a moderate viscosity (3000-5000 [Pa.s]).

[0056] Example 3 Preparation of Epoxidized Soybean Oil-Based Acrylic Resin

[0057] The steps include:

[0058] (1) In a 500 mL three-necked flask, 5% of the total mass of hydroxyethyl acrylate (HEA) in triethylamine is used as a catalyst, 0.2% of the total mass of the reaction materials in step (1) in BASF 168, 62 g of hydroxyethyl acrylate (HEA) and 38 g of maleic anhydride are used as raw materials, and stirred at 200-300 r / min for 1 h at a high temperature of 115° C., 12 g of methyltetrahydrophthalic anhydride is added, the reaction is continued for 1 h, and then 58 g of ESO is added to obtain a prepolymer;

[0059] (2) After adding 4.5 g of hydroxyethyl methacrylate and 8.65 g of hexamethylene diisocyanate to the prepolymer in step (1), the temperature was lowered to 60° C. and stirred at 200-300 r / min for 3 hours until the NCO infrared peak disappeared. After stirring evenly, the material was discharged to obtain an epoxy soybean oil-based acrylic resin with a moderate viscosity (3000-5000 [Pa.s]).

[0060] Example 4 Preparation of nail polish

[0061] The nail polish of this embodiment is composed of the following components by weight:

[0062] Example 1 prepared 44.1 parts of epoxidized soybean oil-based acrylic resin, 18.9 parts of castor oil-based resin, 4 parts of amine-modified polyether acrylate, 21.15 parts of 4-acryloylmorpholine, 10 parts of photoinitiator, 0.1 parts of Digo 920, 0.2 parts of Digo 270, 1.5 parts of fumed silica H30, 0.05 parts of inhibitor 510, and 5 parts of yellow paste; wherein the photoinitiator is a mixture of TPO and 819 in a mass ratio of 8:2.

[0063] The preparation method comprises the following steps:

[0064] (1) stirring an epoxy soybean oil-based acrylic resin, a castor oil-based resin, an amine-modified polyether acrylate and a reactive diluent 4-acryloylmorpholine in a light-proof manner at a temperature of 50-70° C. using a stirrer at a speed of 200-300 r / min for a time of 20-30 min to obtain a mixture I;

[0065] (2) adding a photoinitiator to the mixture I obtained in step (1), stirring the mixture with a stirrer at a temperature of 50-70° C., a stirring speed of 200-300 r / min, and a stirring time of 20-30 min to obtain a mixture II;

[0066] (3) Add defoaming agent Digo 920, leveling agent Digo 270, inhibitor 510 and anti-settling agent fumed silica H30 to the mixture II obtained in step (2), stir with a stirrer at a speed of 200-300 r / min for 20-30 min, and then grind three times with a grinder to obtain a base material;

[0067] (4) At room temperature, add the yellow paste to the base material prepared in step (3), stir evenly, and obtain nail polish.

[0068] Example 5 Preparation of nail polish

[0069] The nail polish of this embodiment is composed of the following components by weight:

[0070] Example 1 prepared 43.61 parts of epoxidized soybean oil-based acrylic resin, 18.69 parts of castor oil-based resin, 4 parts of amine-modified polyether acrylate, 22.9 parts of 4-acryloylmorpholine, 8 parts of photoinitiator, 0.1 parts of Digo 920, 0.2 parts of Digo 270, 1.5 parts of fumed silica H30, 1 part of BASF 264, and 6 parts of white paste; wherein the photoinitiator is a mixture of TPO and 819 in a mass ratio of 8:2.

[0071] The preparation method is similar to that of Example 4.

[0072] Example 6 Preparation of nail polish

[0073] The nail polish of this embodiment is composed of the following components by weight:

[0074] Example 1 prepared 45.24 parts of epoxidized soybean oil-based acrylic resin, 18.96 parts of castor oil-based resin, 3 parts of amine-modified polyether acrylate, 20 parts of 4-acryloylmorpholine, 10 parts of photoinitiator, 0.1 parts of Digo 920, 0.2 parts of Digo 270, 1.5 parts of fumed silica H30, 1 part of BASF 264, and 6.5 parts of blue paste; wherein the photoinitiator is a mixture of TPO and 819 in a mass ratio of 8:2.

[0075] The preparation method is similar to that of Example 4.

[0076] Example 7 Preparation of nail polish

[0077] The nail polish of this embodiment is composed of the following components by weight:

[0078] Example 1 prepared 42.67 parts of epoxidized soybean oil-based acrylic resin, 17.63 parts of castor oil-based resin, 2 parts of amine-modified polyether acrylate, 25.9 parts of 4-acryloylmorpholine, 9 parts of photoinitiator, 0.1 parts of Digo 920, 0.2 parts of Digo 270, 1.5 parts of fumed silica H30, 1 part of BASF 264, and 2.7 parts of black paste; wherein the photoinitiator is a mixture of TPO and 819 in a mass ratio of 8:2.

[0079] The preparation method is similar to that of Example 4.

[0080] Example 8 Preparation of nail polish

[0081] The nail polish of this embodiment is composed of the following components by weight:

[0082] Example 1 prepared 41.3 parts of epoxidized soybean oil-based acrylic resin, 17 parts of castor oil-based resin, 4 parts of amine-modified polyether acrylate, 24.9 parts of reactive diluent, 10 parts of photoinitiator, 0.1 parts of Digo 920, 0.2 parts of Digo 270, 1.5 parts of fumed silica H30, 1 part of BASF 264, and 5 parts of red paste; wherein the reactive diluent is a mixture of 4-acryloylmorpholine and hydroxyethyl methacrylate in a mass ratio of 9:1; the photoinitiator is a mixture of TPO and 819 in a mass ratio of 8:2.

[0083] The preparation method is similar to that of Example 4.

[0084] Test example

[0085] The nail polish prepared in Examples 4-8 was tested for storage stability, odor, pencil hardness, adhesion, flexibility and other properties.

[0086] Storage stability: Place the prepared nail polish in an 80°C forced air oven for 7 days and observe whether there is any gelation.

[0087] Odor test: Place a certain amount of nail polish on the table with the lid open. Ask five people to fan the nail polish with their hands to judge the odor intensity and rate it in the order of 0-5, with the odor of pure water as level 0 and the odor of the photocuring monomer IBOA as level 5. The odors from 0 to 5 become deeper in degree. The average value of the five people's evaluation results is the odor test result.

[0088] Pencil hardness: Use the national standard GB / T6739-1996 method (hardness grade range is 6B~HB~6H, 6H is the hardest and 6B is the softest) to measure the pencil hardness of the coating. Apply the prepared nail polish sealer monomer formula on the glass sheet with an applicator, control the film thickness to 100μm, cure it with a curing machine, and then leave it for one hour to test the pencil hardness.

[0089] Adhesion: In this part of the test, the D3359 ASTM 100-grid test method is usually used. With the help of a 100-grid knife, 10×10 grids of 1mm×1mm are cut on the surface of the test sample. The small grids should be covered and adhered with adhesive tape. Grasp one end of the tape with your hand and tear it off vertically. Perform two tests at the same location.

[0090] Determination of surface drying speed: The method adopted is the finger touch surface drying time determination method in GB / T1728-1979 (1989) "Determination of drying time of paint film and putty film". Touch the surface of the paint film with your finger. If it does not feel sticky, the surface is dry, and no paint sticks to your finger, the surface is dry.

[0091] Flexibility test: Apply nail polish on the chain nail plate without applying a sealant, shine the light at 48W for 60S, and then fold it in half. The more times it is folded, the better the flexibility.

[0092] Viscosity test: With the help of modular intelligent advanced rheometer MCR502, the viscous resistance and dynamic viscosity of liquids can be effectively measured. The viscosity of the nail polish formula is measured at a test temperature of 25°C using a CP25-2 rotor, and the corresponding speed is set to control the torque within the range of 10-90%.

[0093] Gel rate test: At room temperature, weigh an appropriate amount of photocured film sample and immerse it in a sealed glass bottle filled with acetone. After immersion for 48 hours, take out the photocured film sample and place it in a 60°C vacuum drying oven to dry to constant weight. Record the mass W0 of the photocured film before immersion and the mass W1 of the photocured film after drying. The gel rate is calculated according to the following formula:

[0094]

[0095] For accuracy, each sample was measured three times and the average value was taken.

[0096] Mechanical properties: Shenzhen Sansi Zongheng universal testing machine was used to analyze the samples, and a suitable tensile bracket was selected. The sample size was 40.0mm (length) × 10.0mm (width) × 0.5mm (thickness), and the crosshead speed was 10.00mm / min. For the sake of accuracy, each sample was measured five times and the average value was taken.

[0097] The specific test results are shown in Table 1.

[0098] Table 1 Performance test results of vegetable oil-based nail polish

[0099]

[0100] It can be seen from Table 1 that the nail polish provided by the present invention has excellent film-forming property, and there is no shrinkage or wrinkling before and after curing, which indicates that the nail polish of the present invention has good brushability, is easy to operate and use, and can meet the needs of a variety of people; after irradiation with ultraviolet light for 30 seconds, the coating surface is not sticky, which indicates that the nail polish of the present invention has a fast curing speed and can save the waiting time of users; the adhesion and flexibility are good, which indicates that the nail polish of the present invention can remain on the nail for a longer time after curing; the low viscosity indicates that it is relatively safe in the industrial production process; the heat resistance is good, and no agglomeration occurs when stored in an oven at 80°C for more than 7 days, which indicates that the nail polish of the present invention can be stored in a variety of scenarios, ensuring that the product will not deteriorate during transportation or storage.

[0101] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for preparing an epoxy soybean oil-based acrylic resin, characterized in that: The steps include: (1) After mixing and reacting a catalyst, a first polymerization inhibitor, a first hydroxy acrylate and a first acid anhydride at 90-120° C., adding a second acid anhydride and continuing to react at 90-120° C. for 0.5-3 h, and finally adding epoxidized soybean oil to obtain a prepolymer; (2) adding a second hydroxy acrylate and a diisocyanate to the prepolymer prepared in step (1), and reacting at a temperature of 30-60° C. until the NCO infrared peak disappears, thereby obtaining an epoxy soybean oil-based acrylic resin; Wherein, the amount of each raw material is as follows, by weight: 50-70 parts of the first hydroxy acrylate, 20-40 parts of the first acid anhydride, 10-30 parts of the second acid anhydride, 40-70 parts of epoxidized soybean oil, and 2-10 parts of the second hydroxy acrylate; the amount of the catalyst is 1-5% of the mass of the first hydroxy acrylate; the amount of the first polymerization inhibitor is 0.1-0.5% of the mass of the total reaction materials in step (1); the molar ratio of the diisocyanate to the second hydroxy acrylate is 1:(0.8-1.2); The first hydroxy acrylate is selected from at least one of hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl acrylate; the first acid anhydride is selected from at least one of maleic anhydride, acetic anhydride, and benzoic anhydride; the second acid anhydride is selected from at least one of methyltetrahydrophthalic anhydride, phthalic anhydride, and trimellitic anhydride; the second hydroxy acrylate is selected from at least one of hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, and hydroxypropyl acrylate; the diisocyanate is selected from at least one of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, p-phenylene diisocyanate, and cyclohexane dimethylene diisocyanate.

2. The epoxy soybean oil-based acrylic resin obtained according to the preparation method according to claim 1.

3. Nail polish, characterized in that: The invention comprises the following components in parts by weight: 40-60 parts of the epoxy soybean oil-based acrylic resin according to claim 2, 10-30 parts of castor oil-based resin, 0.5-5 parts of amine-modified polyether acrylate, 20-30 parts of reactive diluent, 8-10 parts of photoinitiator, 0.1-0.5 parts of defoamer, 0.1-0.5 parts of leveling agent, 0.05-1.5 parts of second inhibitor, 1-5 parts of anti-settling agent and 0.1-10 parts of color paste.

4. The nail polish gel according to claim 3, characterized in that: The active diluent is selected from at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, isobornyl acrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, dipropylene glycol diacrylate, 1,6-hexanediol diacrylate, and 4-acryloylmorpholine; the photoinitiator is selected from at least one of 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

5. The nail polish gel according to claim 3 or 4, characterized in that: The leveling agent is selected from at least one of Digo 270, Digo 4000, and Digo 4100; the defoaming agent is selected from at least one of Digo 910, Digo 963, Digo 920, and Digo 921; the second inhibitor is selected from at least one of BASF 264, BASF 168, BASF 1010, BASF 1076, and inhibitor 510; the anti-settling agent is fumed silica.

6. The method for preparing nail polish according to any one of claims 3 to 5, characterized in that: The steps include: Mix epoxy soybean oil-based acrylic resin, castor oil-based resin, amine-modified polyether acrylate and active diluent under light-proof conditions; then add photoinitiator, add defoamer, leveling agent, second inhibitor and anti-settling agent after mixing, grind with a grinder after mixing to obtain a base material; add color paste into the base material at room temperature, mix well, and obtain nail polish.

7. The preparation method according to claim 6, characterized in that: The mixing comprises the following steps: stirring with a stirrer at a stirring speed of 200-300 r / min and a stirring time of 20-30 min.

8. The preparation method according to claim 7, characterized in that: The steps include: (1) stirring the epoxy soybean oil-based acrylic resin, castor oil-based resin, amine-modified polyether acrylate and reactive diluent in a light-proof manner at a temperature of 50-70° C. using a stirrer at a speed of 200-300 r / min for a time of 20-30 min to obtain a mixture I; (2) adding a photoinitiator to the mixture I obtained in step (1), stirring the mixture with a stirrer at a temperature of 50-70° C., a stirring speed of 200-300 r / min, and a stirring time of 20-30 min to obtain a mixture II; (3) adding a defoamer, a leveling agent, a second polymerization inhibitor and an anti-settling agent to the mixture II obtained in step (2), stirring with a stirrer at a speed of 200-300 r / min for 20-30 min, and then grinding with a grinder three times to obtain a base material; (4) At room temperature, add the color paste to the base material prepared in step (3), and stir evenly to obtain nail polish.

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