Extension glue, preparation method and application thereof

Abstract

The invention discloses extension glue as well as a preparation method and application thereof, and belongs to the technical field of manicure. The extension glue provided by the invention comprises aliphatic polyurethane acrylate, modified epoxy acrylate and fumed silica, the fumed silica is a nano-scale filler, the refractive index of the fumed silica is low and is close to that of the aliphatic polyurethane acrylate and that of the modified epoxy acrylate, and the fumed silica is a nano-scale filler. The influence of reflection and refraction of light in the penetrating process on transparency is small, so that the extension glue has higher transparency. Moreover, the fumed silica can enhance the moldability of the extension glue, and has a shaping function, so that the extension glue omits a complex method of a paper support, and the process is simplified. Besides, the mercaptan monomer not only can promote the surface drying of the extension glue under a 365nm LED light source curing condition, but also can enhance the reactivity and sensitivity of a free radical polymerization system of the resin under ultraviolet irradiation, so that the color adding requirement is well met, and the deep curing of a colored system is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of nail art, and particularly relates to an extension glue, a preparation method thereof, and an application thereof. Background Art

[0002] In the beauty industry, nail beauty has always been one of the fields that receive much attention. With people's pursuit of beauty and emphasis on personal image, nail beauty has become a popular fashion trend. However, traditional nail polish cannot solve the problem of insufficient nail length, and people have started to develop nail extension glue. The main function of nail extension glue is to extend the nail length. By using nail extension glue, the nail length can be significantly increased, and later it can be beautified with nail polish like ordinary nails.

[0003] The main component of the nail extension glue in the related art is resin. In order to increase the plasticity, a large amount of fillers such as polymethyl methacrylate (PMMA) particles are added. However, the particle size of PMMA particles is relatively large, the refractive index is relatively high, and the refractive index difference from the resin is relatively large. The reflection and refraction during the light penetration process affect the transparency, resulting in poor transparency of the nail extension glue. Summary of the Invention

[0004] The embodiments of the present application provide an extension glue, a preparation method thereof, and an application thereof. The extension glue has high transparency. The technical solution is as follows:

[0005] On the one hand, an extension glue is provided. The extension glue includes the following components in parts by mass:

[0006] 40 - 50 parts of aliphatic polyurethane acrylate, 10 - 20 parts of modified epoxy acrylate, 10 - 20 parts of fumed silica, 5 - 25 parts of monomer, 3 - 8 parts of mercapto monomer, 1 - 5 parts of photoinitiator, 0.02 - 0.5 parts of defoamer, and 0.02 - 0.5 parts of inhibitor.

[0007] In a possible implementation manner, the fumed silica is hydrophobic fumed silica, and the specific surface area is 100 m 2 / g - 200 m 2 / g.

[0008] In another possible implementation manner, the monomer is selected from at least one of methacrylic acid monomers and acrylamide monomers.

[0009] In another possible implementation manner, the monomer is selected from at least one of 2-hydroxyethyl methacrylate, acryloylmorpholine, N,N-dimethylacrylamide, and trimethylolpropane trimethacrylate.

[0010] In another possible implementation, the photoinitiator is selected from at least one of a first photoinitiator and a second photoinitiator;

[0011] The absorption wavelength range of the first photoinitiator is 250 - 350 nm;

[0012] The absorption wavelength range of the second photoinitiator is 350 - 450 nm.

[0013] In another possible implementation, the first photoinitiator is selected from at least one of 1 - hydroxycyclohexyl phenyl ketone, 2 - hydroxy - 2 - methyl - 1 - phenyl - 1 - propanone, and methyl benzoylformate;

[0014] The second photoinitiator is selected from at least one of ethyl 2,4,6 - trimethylbenzoyl phenylphosphinate, bis(2,4,6 - trimethylbenzoyl)phenylphosphine oxide, and 2,4,6 - trimethylbenzoyl - bis(p - tolyl)phosphine oxide.

[0015] In another possible implementation, the thiol monomer is selected from primary thiols or secondary thiols.

[0016] In another possible implementation, the inhibitor is selected from at least one of 2,6 - di - tert - butyl - p - cresol, aluminum N - nitrosophenylhydroxylamine, and BASF 1035.

[0017] In another possible implementation, the extension glue comprises the following components in parts by mass:

[0018] 45 - 50 parts of the aliphatic polyurethane acrylate, 10 - 12 parts of the modified epoxy acrylate, 12 - 15 parts of the fumed silica, 13 - 23 parts of the monomer, 3 - 5 parts of the thiol monomer, 1 - 3 parts of the photoinitiator, 0.05 - 0.5 parts of the defoamer, and 0.05 - 0.5 parts of the inhibitor.

[0019] In another possible implementation, the extension glue further comprises a color paste.

[0020] On the other hand, a method for preparing the extension glue is provided, and the preparation method includes:

[0021] According to the parts by mass of each component, the monomer, the thiol monomer, the defoamer, and the inhibitor are mixed evenly, and then the photoinitiator is added and mixed evenly;

[0022] The aliphatic polyurethane acrylate and the modified epoxy acrylate are continuously added, and after mixing evenly, the fumed silica is added and dispersed evenly to obtain the extension glue.

[0023] On the other hand, provided is an application of an extension glue in preparing an extended resin material.

[0024] An embodiment of the present application provides an extension glue, which includes aliphatic polyurethane acrylate, modified epoxy acrylate and fumed silica. The fumed silica is a nano-level filler with a low refractive index, which is similar to the refractive indices of aliphatic polyurethane acrylate and modified epoxy acrylate. The reflection and refraction of light during penetration have little effect on transparency. Therefore, the extension glue has higher transparency. Moreover, the fumed silica can also enhance the plasticity of the extension glue and has a shaping function, thus eliminating the complex method of using paper trays for the extension glue and simplifying the process. In addition, the mercaptan monomer can not only promote the surface drying of the extension glue under the curing conditions of a 365 nm LED light source, but also enhance the reactivity and sensitivity of the free radical polymerization system of the resin under ultraviolet irradiation, well adapting to the color addition requirement and being beneficial to the deep curing of the colored system.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present disclosure. Detailed Embodiments

[0026] To make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below.

[0027] On the one hand, an embodiment of the present application provides an extension glue, and the extension glue includes the following components in parts by mass:

[0028] 40 - 50 parts of aliphatic polyurethane acrylate, 10 - 20 parts of modified epoxy acrylate, 10 - 20 parts of fumed silica, 5 - 25 parts of monomer, 3 - 8 parts of mercaptan monomer, 1 - 5 parts of photoinitiator, 0.02 - 0.5 parts of defoamer, 0.02 - 0.5 parts of inhibitor.

[0029] Among them, the mass parts of the aliphatic polyurethane acrylate can be 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts; the mass parts of the modified epoxy acrylate can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts; the mass parts of the fumed silica can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts; the mass parts of the monomer can be 5 parts, 8 parts, 10 parts, 12 parts, 14 parts, 15 parts, 18 parts, 20 parts, 22 parts, 24 parts, 25 parts; the mass parts of the mercaptan monomer can be 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts; the mass parts of the photoinitiator can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts; the mass parts of the defoamer can be 0.02 parts, 0.04 parts, 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts; the mass parts of the inhibitor can be 0.02 parts, 0.04 parts, 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts.

[0030] An embodiment of this application provides an extension glue, which includes aliphatic polyurethane acrylate, modified epoxy acrylate and fumed silica. The fumed silica is a nano-level filler with a relatively low refractive index, which is similar to the refractive indices of the aliphatic polyurethane acrylate and the modified epoxy acrylate. The reflection and refraction of light during penetration have little impact on transparency. Therefore, the extension glue has higher transparency. Moreover, the fumed silica can also enhance the plasticity of the extension glue and has a shaping function, thus eliminating the complex method of using paper trays for the extension glue and simplifying the process. In addition, the mercaptan monomer can not only promote the surface drying of the extension glue under the curing conditions of a 365nm LED light source, but also enhance the reactivity and sensitivity of the free radical polymerization system of the resin under ultraviolet irradiation, well adapting to the color addition requirements and being beneficial to the deep curing of the colored system.

[0031] In a possible implementation manner, the weight average molecular weight range of the aliphatic polyurethane acrylate is 1000 g / mol to 10000 g / mol, and further can be 2000 g / mol to 8000 g / mol.

[0032] In the embodiment of this application, the aliphatic polyurethane acrylate can be selected from Guangzhou Run'ao Chemical 5074, 8240, 8510, one or more of Rahn Chemical Genomer*4205, Genomer*4247, Genomer*4267, Genomer*4277.

[0033] In a possible implementation, the weight average molecular weight of the modified epoxy acrylate is in the range of 600 g / mol to 6000 g / mol, and may further be in the range of 1000 g / mol to 4000 g / mol.

[0034] In the embodiments of the present application, the modified epoxy acrylate can be specifically selected from one or more of Sartomer CN2003NS, CNUVE150 / 80NS, and Changxing Chemical 6125-100.

[0035] Compared with the mainstream bisphenol A epoxy acrylate, the modified epoxy acrylate in this application is mainly fatty acid or soybean oil modified epoxy acrylate, which can effectively improve the flexibility of the extension glue and reduce its brittleness. Moreover, the sources of fatty acid and soybean oil are both bio-based, which is more environmentally friendly.

[0036] In the embodiments of the present application, aliphatic polyurethane acrylate is the main resin, which is mainly used to improve the main properties of the extension glue, such as hardness and toughness, and modified epoxy acrylate is the auxiliary resin, which is mainly used to improve the reaction speed, glossiness, solvent resistance and water resistance of the extension glue, and effectively reduce the overall cost. The present application adopts aliphatic polyurethane acrylate and modified epoxy acrylate in the above molecular weight range and then compounded with other components, and each component gives full play to the synergistic effect, thereby improving the hardness, toughness, reaction speed, glossiness, solvent resistance and water resistance of the extension glue.

[0037] In one possible implementation, the fumed silica is selected from hydrophobic fumed silica with a specific surface area of ​​100 m 2 / g~200m 2 / g, and the specific surface area of ​​the hydrophobic fumed silica can be 110m 2 / g~150m 2 / g.

[0038] In this implementation, the hydrophobic fumed silica is selected from Cabot TS-610, Evonik At least one of VPRS92 and Deshan DM-10.

[0039] It should be noted that the surface of hydrophilic fumed silica contains a relatively large number of silanol groups, which can form hydrogen bonds with water molecules, thereby enhancing the affinity between fumed silica and water and affecting the water resistance of the extension glue. The surface of hydrophobic fumed silica is treated with silane to introduce hydrophobic groups, which can reduce the affinity of its surface for water molecules, thereby effectively reducing the interaction between fumed silica and water. It is a nano-functional filler with good hydrophobicity.

[0040] The particle size of the above-mentioned hydrophobic fumed silica provided in this application is 10-100 nm. After being coated on the pressure-sensitive adhesive tape, a water contact angle above 120 °C can be obtained, and it has good hydrophobic performance.

[0041] In the related art, the refractive index of PMMA particles is about 1.49, which is quite different from the refractive index of the resin. Therefore, the transparency of the extension glue is relatively low. In the examples of this application, the refractive index of the hydrophobic fumed silica is about 1.46, and the refractive indices of aliphatic polyurethane acrylate and modified epoxy acrylate are in the range of 1.44-1.48. The refractive index of the hydrophobic fumed silica is close to the refractive index of the resin (aliphatic polyurethane acrylate and modified epoxy acrylate). Therefore, the extension glue has better transparency. Moreover, fumed silica is a nano-functional filler, which can also enhance the plasticity of the extension glue and has a shaping function, thus eliminating the complex method of using paper trays for the extension glue, simplifying the process, and at the same time improving the anti-bending performance of the extension glue.

[0042] In a possible implementation, the monomer is selected from at least one of methacrylic acid monomers and acrylamide monomers.

[0043] In this implementation, the functionality range of the methacrylic acid monomer and the acrylamide monomer is 1-6, and further can be 1-3.

[0044] In the examples of this application, the reaction rate of the methacrylic acid monomer within the above functionality range is more gentle, the heat release during curing is lower, and the irritation to the skin is also lower. The acrylamide monomers within the above functionality range have the advantages of strong dilution force, good viscosity reduction effect, low skin irritation, fast reaction rate, and good toughness.

[0045] In a possible implementation, the monomer is specifically selected from at least one of 2-hydroxyethyl methacrylate (HEMA), acryloylmorpholine (ACMO), N,N-dimethylacrylamide (DMAA), and trimethylolpropane trimethacrylate (TMPTMA).

[0046] In this implementation, the monomer can be any one of hydroxyethyl methacrylate, acryloylmorpholine, N,N-dimethylacrylamide, and trimethylolpropane trimethacrylate, or a mixture of any two components, any three components, or all four components.

[0047] For example, the monomer is a mixture of acryloylmorpholine and trimethylolpropane trimethacrylate, and the mass ratio of the two components is 18:5, 15:8, 13.8:5, 8.8:5, etc.

[0048] Among them, HEMA and TMPTMA belong to methacrylic acid monomers, and ACMO and DMAA belong to acrylamide monomers.

[0049] In a possible implementation, the photoinitiator is selected from at least one of the first photoinitiator and the second photoinitiator;

[0050] The absorption wavelength range of the first photoinitiator is 250 - 350 nm;

[0051] The absorption wavelength range of the second photoinitiator is 350 - 450 nm.

[0052] In this implementation, the first photoinitiator is a short-wavelength photoinitiator, and the maximum absorption wavelength range of the short-wavelength photoinitiator is 250 - 350 nm, further preferably 280 - 350 nm. The second photoinitiator is a long-wavelength photoinitiator, and the maximum absorption wavelength range of the long-wavelength photoinitiator is 350 - 450 nm, further preferably 360 - 410 nm.

[0053] In the embodiments of the present application, the short-wavelength photoinitiator has good surface dryness, and the long-wavelength photoinitiator has good curing effect under a 365 nm LED light source. Since the 360 nm LED light source is not a pure monochromatic spectrum, a short-wavelength photoinitiator and a long-wavelength photoinitiator can be compounded as the photoinitiator to enable the short-wavelength photoinitiator and the long-wavelength photoinitiator to exert a synergistic effect, which can not only improve the surface dryness of the extension glue but also improve the curing effect of the extension glue.

[0054] When compounding the short-wavelength photoinitiator and the long-wavelength photoinitiator, the mass ratio of the short-wavelength photoinitiator to the long-wavelength photoinitiator can be 1:1 - 1:2, specifically 1:1, 1:1.5, 1:1.8, 1:2, etc.

[0055] Among them, the short-wavelength photoinitiator can specifically be selected from at least one of 1-hydroxycyclohexyl phenyl ketone (photoinitiator 184), 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173), and methyl benzoylformate (photoinitiator MBF).

[0056] The long-wavelength photoinitiator can specifically be selected from at least one of ethyl 2,4,6-trimethylbenzoyl phenylphosphinate (photoinitiator TPO-L), bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide (photoinitiator 819), and bis(4-methylbenzoyl)-2,4,6-trimethylbenzoylphosphine oxide (photoinitiator TMO).

[0057] It should be noted that common nail lamps are divided into two types, fluorescent lamps and LED lamps. The emission spectrum of fluorescent lamps is in the range of 370 - 420 nm, and the emission spectrum of LED lamps is around 365 nm / 395 nm. The emission spectra of both light sources belong to the long-wave region. Therefore, the extension gel needs to select a photoinitiator that absorbs long-wave light, such as TPO (absorption wavelength 350 - 400 nm), TPO-L (absorption wavelength 270 - 370 nm), 819 (absorption wavelength 365 - 405 nm). Since the initiation efficiency of TPO-L is relatively low and the curing yellowing of 819 is relatively large, TPO is preferably selected as the photoinitiator. However, previously, the European Chemicals Agency (ECHA) officially announced that TPO was included in the candidate list of the 29th batch of Substances of Very High Concern (SVHC). Using TMO instead of TPO can avoid the Reach ban restrictions of the European Union. In addition, the molecular weight of TMO is greater than that of TPO, and the molecular movement in the system is more difficult. Compared with TPO, TMO has lower mobility as a long-wavelength photoinitiator and better environmental friendliness.

[0058] Furthermore, the short-wavelength photoinitiator can be selected from photoinitiator MBF or photoinitiator 184, and the long-wavelength photoinitiator can be selected from photoinitiator TMO.

[0059] In the embodiments of the present application, at least one of photoinitiator 184, 1173, and MBF as a short-wavelength photoinitiator can play an auxiliary promoting role in surface drying, and at least one of photoinitiator TPO-L, TMO, and 819 as a long-wavelength photoinitiator matches the main wavelength of the 365 nm LED light source and can play a role in promoting good deep curing. The compounding of at least one of photoinitiator 184, 1173, and MBF and at least one of photoinitiator TPO-L, TMO, and 819 can not only shorten the surface drying time of the extension gel but also promote the deep curing of the extension gel.

[0060] In a possible implementation manner, the thiol monomer is selected from primary thiols or secondary thiols.

[0061] Among them, primary thiols can be regarded as obtained by replacing oxygen in ordinary alcohols with sulfur, and secondary thiols contain two sulfur groups that replace hydrogen atoms.

[0062] The thiol monomer can specifically be selected from Showa Denko Karenz MT PE1, SC Organic Chemistry Lecad 804, and BrunoBock one or more of PETMP.

[0063] In this application, using secondary mercaptans or screened primary mercaptans can not only promote the surface drying of the extension glue under the curing conditions of a 365 nm LED light source, but also enhance the reactivity and sensitivity of the free radical polymerization system of the resin under ultraviolet irradiation, well adapt to the additive color requirements, and is beneficial to the deep curing of the colored system.

[0064] In a possible implementation, the polymerization inhibitor is selected from at least one of 2,6-di-tert-butyl-p-cresol, aluminum N-nitroso-N-phenylhydroxylamine, and BASF 1035.

[0065] In the embodiments of this application, using the above polymerization inhibitor in combination with the mercaptan monomer can solve the problems of strong odor and poor storage stability of the extension glue.

[0066] In a possible implementation, the defoamer is a non-silicon defoamer. The non-silicon defoamer and the colloid have good compatibility and do not affect the transparency of the colloid. While the silicone-based defoamer has poor compatibility with the colloid and is likely to cause incompatibility, resulting in a problem of poor colloid transparency.

[0067] Among them, the non-silicon defoamer can specifically be one or more of Heimers Degussa Defom 3500, Kyoeisha Chemical FLOWLEN AC-300VF, and BYK-1790.

[0068] In the embodiments of this application, the defoamer is mainly used to eliminate or reduce bubbles and improve the quality and performance of the extension glue.

[0069] In the embodiments of this application, the extension glue may further include the following components in parts by mass:

[0070] 45 - 50 parts of aliphatic polyurethane acrylate, 10 - 12 parts of modified epoxy acrylate, 12 - 15 parts of fumed silica, 13 - 23 parts of monomer, 3 - 5 parts of mercaptan monomer, 1 - 3 parts of photoinitiator, 0.05 - 0.5 parts of defoamer, 0.05 - 0.5 parts of polymerization inhibitor.

[0071] The extension glue prepared with the above components in parts by mass has the advantages of high transparency, high strength, and good toughness.

[0072] In a possible implementation, the extension glue further includes color paste.

[0073] Among them, the color of the color paste can be added and changed according to needs. For example, black or other colors are not specifically limited.

[0074] In the embodiments of the present application, extender gels of different colors can be prepared by adding color pastes of different colors, so as to meet people's needs for extender gels of different colors.

[0075] On the other hand, the embodiments of the present application provide a method for preparing an extender gel, and the preparation method includes:

[0076] Step 1: According to the mass parts of each component, mix the monomer, thiol monomer, defoaming agent and inhibitor evenly, and then add the photoinitiator and mix evenly.

[0077] According to the mass parts of each component, add the monomer, thiol monomer, defoaming agent and inhibitor into a container, mix evenly, then add the photoinitiator, and stir at high speed until the photoinitiator is completely dissolved.

[0078] Among them, the adding order of the monomer, thiol monomer, defoaming agent and inhibitor can be set and changed as needed. For example, add the monomer, thiol monomer, defoaming agent and inhibitor in sequence, and no specific limitation is made thereto.

[0079] Step 2: Continuously add aliphatic polyurethane acrylate and modified epoxy acrylate, mix evenly, then add fumed silica and disperse evenly to obtain the extender gel.

[0080] Continuously add aliphatic polyurethane acrylate and modified epoxy acrylate into the container, disperse evenly at a temperature of 30°C to 50°C, then continue to add fumed silica, and stir at high speed to make the fumed silica disperse evenly to obtain the extender gel.

[0081] Among them, the adding order of aliphatic polyurethane acrylate and modified epoxy acrylate can be set and changed as needed. For example, add aliphatic polyurethane acrylate and modified epoxy acrylate in sequence, or add modified epoxy acrylate and aliphatic polyurethane acrylate in sequence, and no specific limitation is made thereto.

[0082] The extender gel prepared in the present application is in the form of a semi-solid paste. Compared with the traditional liquid extender gel, the extender gel prepared in the present application can omit the complicated method of using a paper form, simplify the process, and the formed extender gel has the advantages of high transparency, high strength and good toughness.

[0083] On the other hand, the embodiments of the present application provide an application of an extender gel in the preparation of an extended resin material. For example, preparing a nail extender gel to extend the length of the nails.

[0084] To make the technical solutions and advantages of the present application clearer, the following will be elaborated in detail through specific examples.

[0085] In the following specific embodiments, operations not specified with conditions are carried out under conventional conditions or conditions recommended by the manufacturer. Raw materials not specified with the manufacturer and specifications are all conventional products that can be obtained through commercial purchase.

[0086] Among them, the aliphatic polyurethane acrylate is selected from Runao Chemical of Guangzhou 8510, Genomer*4205 of Rahn Chemical;

[0087] The modified epoxy acrylate is selected from Sartomer CNUVE150 / 80NS;

[0088] The fumed silica is selected from Evonik VPRS92;

[0089] The monomers are selected from ACMO, TMPTMA;

[0090] The thiol monomer is selected from Showa Denko Karenz MT PE1;

[0091] The photoinitiators are selected from photoinitiator 184, MBF, TMO, TPO;

[0092] The defoamer is selected from BYK-1790;

[0093] The inhibitor is selected from aluminum N-nitroso-N-phenylhydroxylamine.

[0094] Example 1

[0095] Example 1 provides an extender glue, which is prepared by the following method: Add 18 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine into a container. After mixing evenly, add 1 part by mass of photoinitiator 184 and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0096] Continue to add 48 parts by mass of 8510, 10 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 12 parts by mass of VPRS92, and disperse until it is uniformly transparent to obtain the extender glue.

[0097] Example 2

[0098] Example 2 provides an extension glue, which is prepared by the following method: Add 15 parts by mass of ACMO, 8 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0099] Continue to add 45 parts by mass of Genomer*4205 and 10 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 15 parts by mass of VPRS92, and disperse until it is uniformly transparent to obtain the extension glue.

[0100] Example 3

[0101] Example 3 provides an extension glue, which is prepared by the following method: Add 13.8 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 2 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0102] Continue to add 50 parts by mass of 8510 and 12 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 12 parts by mass of VPRS92, and disperse until it is uniformly transparent to obtain the extension glue.

[0103] Example 4

[0104] Example 4 provides an extension glue, which is prepared by the following method: Add 8.8 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1 part by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0105] Continue to add 50 parts by mass of Genomer*4205 and 15 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 15 parts by mass of VPRS92, and disperse until it is uniformly transparent to obtain the extension glue.

[0106] Example 5

[0107] Example 5 provides an extension glue, which is prepared by the following method: Add 18 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0108] Continue to add 48 parts by mass of 8510, 10 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 12 parts by mass of VPRS92 and 2 parts by mass of self-made black nano color paste, disperse evenly to obtain the extension glue.

[0109] Comparative Example 1

[0110] Comparative Example 1 provides an extension glue, which is prepared by the following method: Add 15 parts by mass of ACMO, 8 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0111] Continue to add 45 parts by mass of Genomer*4205, 10 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 15 parts by mass of PMMA fine powder, disperse evenly to obtain the extension glue.

[0112] Comparative Example 2

[0113] Comparative Example 2 provides an extension glue, which is prepared by the following method: Add 8.8 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1 part by mass of photoinitiator TPO, and stir until the solids are completely dissolved.

[0114] Continue to add 50 parts by mass of Genomer * 4205, 15 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 15 parts by mass of VPRS92, disperse evenly to obtain the extension glue.

[0115] Comparative Example 3

[0116] Comparative Example 3 provides an extension glue, which is prepared by the following method: Add 18 parts by mass of ACMO, 5 parts by mass of TMPTMA, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0117] Continue to add 48 parts by mass of 8510, 10 parts by mass of CNUVE150 / 80NS, disperse evenly at 30 - 50 °C, and then continue to add 12 parts by mass of VPRS92, disperse evenly to obtain the extension glue.

[0118] Comparative Example 4

[0119] Comparative Example 4 provides an extension glue, which is prepared by the following method: Add 15 parts by mass of ACMO, 8 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 part by mass of BYK-1790, and 0.1 part by mass of aluminum N-nitroso-N-phenylhydroxylamine to a container. After mixing evenly, add 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO, and stir until the solids are completely dissolved.

[0120] Continue to add 55 parts by mass of Genomer*4205, disperse evenly at 30 - 50 °C, and then continue to add 15 parts by mass of VPRS92, disperse until uniformly transparent to obtain the extension glue.

[0121] The formulations of Examples 1 - 5 and Comparative Examples 1 - 4 can also be seen in Table 1 below.

[0122] Table 1

[0123]

[0124] Application Example

[0125] Material: ABS false nail pieces.

[0126] Process: ABS false nail pieces → Coating with extension glue → Curing with a 120-watt LED lamp (model: SUN X5 Max) for 60 s.

[0127] Make test nails according to the above film-forming conditions. After standing for 48 h for curing and then conducting tests, the test results are shown in Table 2 below.

[0128] Table 2

[0129]

[0130] Among them, the migration test conditions are as follows:

[0131] Since the boiling points of photoinitiators TPO and TMO are greater than 500 °C and GC-MS chromatography-mass spectrometry cannot be used, the extraction ultraviolet absorption method with high reproducibility is adopted in this application.

[0132] Weigh 0.025 g of the cured film prepared by different photoinitiators, dissolve it in 20 mL of acetonitrile, and use a PerkinElmer LAMBDA 1050+ ultraviolet-visible-near-infrared spectrophotometer to measure the absorbance of the solution after 12 h at 25 °C. According to the Lambert-Beer law: A = kbc, where A is the absorption intensity at the maximum absorption wavelength, k is the molar extinction coefficient at the maximum absorption wavelength, b = 1 cm, and c is the concentration of the initiator. Calculate the mass N1 of the initiator that has migrated out. N0 is the added amount of the initiator, and the migration rate N is calculated by the following formula: N = N1 / N0 × 100%.

[0133] It can be seen from Table 2 that in Comparative Example 1, PMMA micro powder was added, and the prepared extension glue had fluidity, the appearance of the finished product was slightly turbid, and the bending resistance was poor. In Comparative Example 2, TPO and MBF were used in combination as photoinitiators, and the prepared extension glue had poor alcohol and water resistance and high migration. The extension glue prepared by adding color paste in Example 5 could better meet the color addition performance. The difference between Comparative Example 3 and Example 5 was that the mercaptan monomer Karenz MT PE1 was not added, and the curing effect of the prepared extension glue was poor. In Comparative Example 4, only aliphatic polyurethane acrylate was used, and the modified epoxy acrylate was not added. The prepared extension glue had a slow curing speed, low gloss, low hardness, and insufficient solvent resistance.

[0134] The performance of the extension glue prepared in Examples 1 to 5 was significantly better than that of the extension glue prepared in Comparative Examples 1 to 4. Therefore, the extension glue prepared in this application has the characteristics of being transparent and plump, having high colloid strength, good bending resistance, good deep curing for color addition, and low migration.

[0135] In summary, in this application, aliphatic polyurethane acrylate, modified epoxy acrylate, fumed silica, monomer, mercaptan monomer, photoinitiator, and inhibitor are compounded, and the dosages of each component are limited to enable each component to fully play a synergistic role. Finally, the extension glue has the characteristics of being transparent and plump, having high colloid strength, good bending resistance, good deep curing for color addition, and low migration. Adjusting a single resin, filler, and photoinitiator cannot achieve the above effects.

[0136] The above description is only for the convenience of those skilled in the art to understand the technical solution of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An extension glue, characterized in that, The extension glue comprises the following components in parts by mass: 40-50 parts of aliphatic polyurethane acrylate, 10-20 parts of modified epoxy acrylate, 10-20 parts of fumed silica, 5-25 parts of monomer, 3-8 parts of thiol monomer, 1-5 parts of photoinitiator, 0.02-0.5 part of defoamer, and 0.02-0.5 part of inhibitor.

2. The extension glue according to claim 1, characterized in that, The fumed silica is hydrophobic fumed silica with a specific surface area of 100 m 2 / g to 200 m 2 / g.

3. The extension glue according to claim 1, wherein, The monomer is selected from at least one of methacrylic acid monomers and acrylamide monomers.

4. The extension glue according to claim 3, wherein The monomer is selected from at least one of hydroxyethyl methacrylate, acryloylmorpholine, N,N-dimethylacrylamide, and trimethylolpropane trimethacrylate.

5. The extension glue according to claim 1, characterized in that, The photoinitiator is selected from at least one of a first photoinitiator and a second photoinitiator; The absorption wavelength range of the first photoinitiator is 250-350 nm; The absorption wavelength range of the second photoinitiator is 350-450 nm.

6. The extended glue according to claim 5, characterized in that, The first photoinitiator is selected from at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and methyl benzoylformate; The second photoinitiator is selected from at least one of ethyl 2,4,6-trimethylbenzoyl phenylphosphinate, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, and 2,4,6-trimethylbenzoyl-bis(p-tolyl)phosphine oxide.

7. The extended glue according to claim 1, characterized in that, The thiol monomer is selected from primary thiols or secondary thiols.

8. The extended glue according to claim 1, characterized in that, The inhibitor is selected from at least one of 2,6-di-tert-butyl-p-cresol, aluminum N-nitroso-N-phenylhydroxylamine, and BASF 1035.

9. The preparation method of the extension glue according to any one of claims 1 to 8, characterized in that, The preparation method includes: Mixing the monomer, thiol monomer, defoamer, and inhibitor evenly according to the parts by mass of the components, then adding the photoinitiator and mixing evenly; Continuously adding aliphatic polyurethane acrylate and modified epoxy acrylate, mixing evenly, and then adding fumed silica and dispersing evenly to obtain the extension glue.

10. Use of the extension glue according to any one of claims 1 to 8 in the preparation of an extended resin material.

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