Extension adhesive, and preparation method therefor and use thereof

Abstract

The present application belongs to the technical field of manicure. Disclosed are extension adhesive, and a preparation method therefor and the use thereof. The extension adhesive provided by the present application comprises aliphatic polyurethane acrylate, modified epoxy acrylate, fumed silica, a monomer, a thiol monomer, a photoinitiator, a defoaming agent and a polymerization inhibitor, wherein the fumed silica is a nano-scale filler with a lower refractive index, which is similar to that of the aliphatic polyurethane acrylate and modified epoxy acrylate, and the reflection and refraction of light in the penetrating process have relatively little influence on transparency, such that the extension adhesive has higher transparency. Moreover, the fumed silica can improve the moldability of the extension adhesive, and has a shaping function, thus eliminating the complicated practice of a paper holder and simplifying the process for the extension adhesive.

Description

Extension glue, preparation method and application thereof

[0001] The present disclosure is based on a Chinese patent application with the application date of September 30, 2024, the application number of 202411395726.X, and the invention name of "Extension glue, preparation method and application thereof", and claims the priority of the Chinese patent application, the whole content of which is incorporated into the present disclosure as reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of nail art, in particular to an extension glue, a preparation method and application thereof. BACKGROUND

[0003] In the beauty industry, nail beauty has always been one of the fields that attract 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 begun to develop nail extension glue. The main function of nail extension glue is to extend the length of the nail. By using nail extension glue, the length of the nail can be significantly increased, and later it can be beautified like ordinary nails using nail polish.

[0004] The main component of the nail extension glue in the related art is resin, and a large amount of filler such as polymethyl methacrylate (PMMA) particles is also added to increase the plasticity. However, the particle size of PMMA particles is large, the refractive index is high, and the refractive index difference with the resin is large, the reflection and refraction of light in the transmission process affect the transparency, resulting in poor transparency of the nail extension glue. SUMMARY

[0005] The present application provides an extension glue, a preparation method and application thereof, and the extension glue has high transparency. The technical solution is as follows:

[0006] In one aspect, an extension glue is provided, which includes the following components by mass fraction:

[0007] aliphatic polyurethane acrylate 40-50 parts, modified epoxy acrylate 10-20 parts, fumed silica 10-20 parts, monomer 5-25 parts, thiol monomer 3-8 parts, photoinitiator 1-5 parts, defoamer 0.02-0.5 parts, and polymerization inhibitor 0.02-0.5 parts.

[0008] In one possible implementation, the fumed silica is hydrophobic fumed silica, and the specific surface area is 100 m 2 / g-200 m 2 / g.

[0009] In another possible implementation, the monomer is selected from at least one of methacrylate monomers and acrylamide monomers.

[0010] In another possible implementation, the monomer is selected from at least one of hydroxyethyl methacrylate, acrylmorpholine, N,N-dimethylacrylamide, and trimethylolpropane trimethacrylate.

[0011] In another possible implementation, the photoinitiator is selected from at least one of a first photoinitiator and a second photoinitiator;

[0012] The absorption wavelength range of the first photoinitiator is 250 nm to 350 nm;

[0013] The absorption wavelength range of the second photoinitiator is 350 nm to 450 nm.

[0014] In another possible implementation, the first photoinitiator is selected from at least one of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, and methyl benzoate;

[0015] The second photoinitiator is selected from at least one of ethyl 2,4,6-trimethylbenzoylphenylphosphonate, phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, and 2,4,6-trimethylbenzoyl-bis(p-tolyl)phosphine oxide.

[0016] In another possible implementation, the thiol monomer is selected from primary thiols or secondary thiols.

[0017] In another possible implementation, the polymerization inhibitor is selected from 2,6-di-tert-butyl-p-cresol, N-nitroso-N-phenylhydroxylamine aluminum, BASF, etc. At least one of them.

[0018] In another possible implementation, the elongating adhesive comprises the following components in parts by weight:

[0019] The aliphatic polyurethane acrylate comprises 45 to 50 parts, the modified epoxy acrylate comprises 10 to 12 parts, the fumed silica comprises 12 to 15 parts, the monomer comprises 13 to 23 parts, the thiol monomer comprises 3 to 5 parts, the photoinitiator comprises 1 to 3 parts, the defoamer comprises 0.05 to 0.5 parts, and the polymerization inhibitor comprises 0.05 to 0.5 parts.

[0020] In another possible implementation, the elongating adhesive also includes a colorant.

[0021] On the other hand, a method for preparing an elongating adhesive is provided, wherein the elongating adhesive is as described in any of the preceding claims, and the preparation method includes:

[0022] The monomer, mercaptan monomer, defoaming agent and polymerization inhibitor are mixed uniformly according to the mass fraction of each component, and then the photoinitiator is added and mixed uniformly;

[0023] The aliphatic polyurethane acrylate and modified epoxy acrylate are continuously added, uniformly mixed, and then the fumed silica is added and uniformly dispersed to obtain the lengthening glue.

[0024] In another aspect, the application provides a use of the lengthening glue in the preparation of a lengthening resin material, wherein the lengthening glue is as described in any one of the above.

[0025] The application provides a lengthening glue, which comprises aliphatic polyurethane acrylate, modified epoxy acrylate, fumed silica, monomer, mercaptan monomer, photoinitiator, defoaming agent and polymerization inhibitor.

[0026] It should be understood that the foregoing general description and the following detailed description are only examples and cannot limit the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the application clearer, the embodiments of the application are further described in detail below.

[0028] In one aspect, the application provides a lengthening glue, which comprises the following components in the mass fraction:

[0029] The aliphatic polyurethane acrylate is 40-50 parts, the modified epoxy acrylate is 10-20 parts, the fumed silica is 10-20 parts, the monomer is 5-25 parts, the mercaptan monomer is 3-8 parts, the photoinitiator is 1-5 parts, the defoaming agent is 0.02-0.5 parts, and the polymerization inhibitor is 0.02-0.5 parts.

[0030] The mass fraction 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, etc., the mass fraction 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, etc., the mass fraction 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, etc., the mass fraction 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, etc., the mass fraction 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, etc., the mass fraction 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, etc., the mass fraction of the defoaming agent 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, etc., and the mass fraction of the polymerization 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, etc.

[0031] The embodiment of the present application provides a prolonging glue, which comprises aliphatic polyurethane acrylate, modified epoxy acrylate, fumed silica, monomer, mercaptan monomer, photoinitiator, defoaming agent and polymerization inhibitor. The fumed silica is a nanoscale filler, and has a low refractive index, which is close to the refractive index of the aliphatic polyurethane acrylate and the modified epoxy acrylate. The reflection and refraction of light in the penetration process have a small influence on the transparency, so that the prolonging glue has higher transparency. In addition, the fumed silica can also enhance the plasticity of the prolonging glue, and has a shaping function, so that the prolonging glue can be free of the complex paper support process, and the process is simplified. In addition, the mercaptan monomer can not only promote the surface drying of the prolonging glue under the curing condition of a 365nm LED light source, but also can strengthen the reactivity and sensitivity of the free radical polymerization system of the resin under ultraviolet irradiation, so that the prolonging glue can well adapt to the color adding demand, and is beneficial to the deep curing of the colored system.

[0032] In a possible implementation manner, the weight average molecular weight of the aliphatic polyurethane acrylate ranges from 1000g / mol to 10000g / mol.

[0033] For example, the weight average molecular weight of the aliphatic polyurethane acrylate can be 1000 g / mol, 2000 g / mol, 3000 g / mol, 4000 g / mol, 5000 g / mol, 6000 g / mol, 7000 g / mol, 8000 g / mol, 9000 g / mol, 10000 g / mol, etc. For example, the weight average molecular weight of the aliphatic polyurethane acrylate ranges from 2000 g / mol to 8000 g / mol.

[0034] In the embodiments of the present application, the aliphatic polyurethane acrylate can be selected from one or more of the following: Guangzhou Runao Chemical Co., Ltd. Rahn Chemical Genomer*4205, Genomer*4247, Genomer*4267, Genomer*4277.

[0035] In one possible implementation, the weight average molecular weight of the modified epoxy acrylate ranges from 600 g / mol to 6000 g / mol.

[0036] For example, the weight average molecular weight of the modified epoxy acrylate can be 600 g / mol, 800 g / mol, 1000 g / mol, 2000 g / mol, 3000 g / mol, 4000 g / mol, 5000 g / mol, 6000 g / mol, etc. For example, the weight average molecular weight of the modified epoxy acrylate ranges from 1000 g / mol to 4000 g / mol.

[0037] In the embodiments of the present application, the modified epoxy acrylate can be selected from one or more of the following: Sartomer CN2003NS, CNUVE150 / 80NS, Changxing Chemical 6125-100.

[0038] Compared with mainstream bisphenol A type epoxy acrylate, the modified epoxy acrylate in the present application is mainly a fatty acid or soybean oil modified epoxy acrylate. This modification can effectively improve the flexibility of the extending glue and reduce the brittleness. Moreover, the sources of the fatty acid and the soybean oil are bio-based, which is more environmentally friendly.

[0039] In the embodiments of the present application, the aliphatic polyurethane acrylate is the main resin, which is mainly used to improve the hardness, toughness and other main properties of the extending glue. The modified epoxy acrylate is the auxiliary resin, which is mainly used to improve the reaction speed, gloss, solvent resistance and water resistance of the extending glue, and effectively reduce the comprehensive cost. The aliphatic polyurethane acrylate and the modified epoxy acrylate with the above molecular weight range are used in the present application, and other components are compounded, so that the components fully play a synergistic effect, thereby improving the hardness, toughness, reaction speed, gloss, solvent resistance and water resistance of the extending glue.

[0040] In one possible implementation, the fumed silica is selected from hydrophobic fumed silica having a specific surface area of 100 m 2 / g to 200 m 2 / g.

[0041] For example, the hydrophobic fumed silica can have a specific surface area of 100 m 2 / g, 110 m 2 / g, 120 m 2 / g, 130 m 2 / g, 140 m 2 / g, 150 m 2 / g, 160 m 2 / g, 170 m 2 / g, 180 m 2 / g, 190 m 2 / g, 200 m 2 / g, etc. For example, the hydrophobic fumed silica can have a specific surface area of 110 m 2 / g to 150 m 2 / g.

[0042] In this implementation, the hydrophobic fumed silica can be selected from at least one of Cabot Wincrete Desen DM-10.

[0043] It should be noted that the surface of the hydrophilic fumed silica contains a large number of silicon hydroxyl groups, which can form hydrogen bonds with water molecules, thereby enhancing the affinity of the fumed silica to water and affecting the water resistance of the extended adhesive. The surface of the hydrophobic fumed silica is treated with silane to introduce hydrophobic groups, which can reduce the affinity of the surface to water molecules, thereby effectively reducing the interaction between the fumed silica and water, and the fumed silica is a nano functional filler with good hydrophobicity.

[0044] The hydrophobic fumed silica provided in the present application has a particle size of 10 nm to 100 nm, and after being coated on the pressure-sensitive adhesive tape, a water contact angle of 120℃ or higher can be obtained, and the hydrophobic fumed silica has good hydrophobicity.

[0045] 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, so the transparency of the prolonging glue is low. In the embodiments of the present application, the refractive index of the hydrophobic fumed silica is about 1.46, the refractive index of the aliphatic polyurethane acrylate and the modified epoxy acrylate is in the range of 1.44-1.48, and the refractive index of the hydrophobic fumed silica is similar to the refractive index of the resin (aliphatic polyurethane acrylate and modified epoxy acrylate), so the prolonging glue has better transparency. Moreover, the fumed silica is a nanoscale functional filler, which can also enhance the plasticity of the prolonging glue and has a shaping function, so that the prolonging glue can omit the complex process of paper support, simplify the process, and improve the bending resistance of the prolonging glue.

[0046] In a possible implementation, the monomer is selected from at least one of a methacrylate monomer and an acrylamide monomer.

[0047] In this implementation, the functionality of the methacrylate monomer and the acrylamide monomer ranges from 1 to 6.

[0048] For example, the functionality of the methacrylate monomer and the acrylamide monomer ranges from 1 to 3.

[0049] In the embodiments of the present application, the reaction speed of the methacrylate monomer with the above functionality range is more moderate, the heat release during curing is lower, and the skin irritation is also lower. The acrylamide monomer with the above functionality range has the advantages of strong dilution, good viscosity reduction effect, low skin irritation, fast reaction speed, and good toughness.

[0050] In a possible implementation, the monomer is selected from at least one of hydroxyethyl methacrylate (HEMA), acryloyl morpholine (ACMO), N,N-dimethyl acrylamide (DMAA), and trimethylolpropane trimethacrylate (TMPTMA).

[0051] In this implementation, the monomer can be any one of hydroxyethyl methacrylate, acryloyl morpholine, N,N-dimethyl acrylamide, and trimethylolpropane trimethacrylate, or a mixture of any two components, any three components, or four components.

[0052] For example, the monomer is a mixture of acryloyl morpholine and trimethylolpropane trimethacrylate, and the mass fraction ratio of the two components is 18:5, 15:8, 13.8:5, 8.8:5, etc.

[0053] Among them, HEMA and TMPTMA belong to methacrylate monomers, and ACMO and DMAA belong to acrylamide monomers.

[0054] In a possible implementation, the photoinitiator is selected from at least one of a first photoinitiator and a second photoinitiator;

[0055] The first photoinitiator has an absorption wavelength range of 250 nm to 350 nm.

[0056] The second photoinitiator has an absorption wavelength range of 350 nm to 450 nm.

[0057] In this implementation, the first photoinitiator is a short-wave photoinitiator, and the short-wave photoinitiator has a maximum absorption wavelength range of 250 nm to 350 nm. For example, the maximum absorption wavelength of the short-wave photoinitiator can be 250 nm, 260 nm, 270 nm, 280 nm, 290 nm, 300 nm, 310 nm, 320 nm, 330 nm, 340 nm, 350 nm, or the like. For example, the maximum absorption wavelength of the short-wave photoinitiator ranges from 280 nm to 350 nm.

[0058] The second photoinitiator is a long-wave photoinitiator, and the long-wave photoinitiator has a maximum absorption wavelength range of 350 nm to 450 nm. For example, the maximum absorption wavelength of the long-wave photoinitiator can be 350 nm, 360 nm, 370 nm, 380 nm, 390 nm, 400 nm, 410 nm, 420 nm, 430 nm, 440 nm, 450 nm, or the like. For example, the maximum absorption wavelength of the long-wave photoinitiator ranges from 360 nm to 410 nm.

[0059] In the embodiments of the present application, the short-wave photoinitiator has good surface dryness, and the long-wave photoinitiator has good curing effect under a 365 nm LED light source. Since the 360 nm LED light source is not pure monochromatic spectrum, the short-wave photoinitiator and the long-wave photoinitiator can be compounded as the photoinitiator, so that the short-wave photoinitiator and the long-wave photoinitiator can play a synergistic effect, which can improve the surface dryness of the extension glue and the curing effect of the extension glue.

[0060] When the short-wave photoinitiator and the long-wave photoinitiator are compounded, the mass ratio of the short-wave photoinitiator to the long-wave photoinitiator can be 1:1 to 1:2. For example, the mass ratio of the short-wave photoinitiator to the long-wave photoinitiator can be 1:1, 1:1.5, 1:1.8, 1:2, or the like.

[0061] The short-wave photoinitiator can 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).

[0062] The long-wave photoinitiator can be selected from at least one of 2,4,6-trimethylbenzoyl phenyl ethyl phosphinate (photoinitiator TPO-L), phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide (photoinitiator 819), 2,4,6-trimethylbenzoyl-di(p-tolyl) phosphine oxide (photoinitiator TMO).

[0063] It should be noted that common manicure lamps are divided into two types, fluorescent lamps and LED lamps. The emission spectrum of the fluorescent lamp is 370nm-420nm, and the emission spectrum of the LED lamp is about 365nm / 395nm. The emission spectrum of both light sources belongs to the long-wave region, therefore, the extension glue needs to select a long-wave absorbing photoinitiator, such as TPO (absorption wavelength 350nm-400nm), TPO-L (absorption wavelength 270nm-370nm), 819 (absorption wavelength 365nm-405nm). Since the initiation efficiency of TPO-L is low and the yellowing of 819 is large, TPO is the first choice as a photoinitiator. However, previously, the European Chemicals Agency (ECHA) officially announced that TPO is included in the 29th batch of candidate list of substances of very high concern (SVHC), and the use of 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 motion in the system is more difficult, compared with TPO, TMO as a long-wave photoinitiator has lower migration and better environmental protection.

[0064] In one possible implementation, the short-wave photoinitiator is selected from photoinitiator MBF or photoinitiator 184, and the long-wave photoinitiator is selected from photoinitiator TMO.

[0065] In the embodiments of the present application, at least one of photoinitiators 184, 1173 and MBF as a short-wave photoinitiator can play an auxiliary promoting role in surface drying, and at least one of photoinitiators TPO-L, TMO and 819 as a long-wave photoinitiator matches the main wavelength of the 365nm LED light source, which can play a role in promoting good deep curing. The use of at least one of photoinitiators 184, 1173 and MBF and at least one of photoinitiators TPO-L, TMO and 819 can not only shorten the surface drying time of the extension glue, but also promote the deep curing of the extension glue.

[0066] In one possible implementation, the thiol monomer is selected from a primary thiol or a secondary thiol.

[0067] The primary thiol can be regarded as the oxygen in the ordinary alcohol being replaced by sulfur, and the secondary thiol contains two sulfur groups with replaced hydrogen atoms.

[0068] The thiol monomer can be selected from Showa Denko Karenz MT PE1, SC Organic Chemicals Lecad 804 and Bruno Bock One or more of PETMP.

[0069] The application uses secondary thiols or screened primary thiols, which can not only promote the surface drying of the extended adhesive under the curing conditions of 365nm LED light source, but also enhance the reactivity and sensitivity of the resin in the free radical polymerization system under ultraviolet irradiation, which can well meet the coloring requirements and is conducive to the deep curing of colored systems.

[0070] In one possible implementation, the polymerization inhibitor is selected from 2,6-di-tert-butyl-p-cresol, N-nitroso-N-phenylhydroxylamine aluminum, BASF, etc. At least one of them.

[0071] In the embodiments of this application, the above-mentioned polymerization inhibitor is used in combination with thiol monomers, which can solve the problems of strong odor and poor storage stability of extended adhesive.

[0072] In one possible implementation, the defoamer is a non-silicone defoamer. Non-silicone defoamers have good compatibility with the colloid and do not affect the transparency of the colloid. In contrast, silicone defoamers have poor compatibility with the colloid and are prone to causing incompatibility, leading to a decrease in the transparency of the colloid.

[0073] Among them, the non-silicone defoamer can be selected from one or more of Hemings Deqian Defom 3500, Kyoeisha Chemical FLOWLEN AC-300VF and BYK-1790.

[0074] In the embodiments of this application, the defoamer is mainly used to eliminate or reduce bubbles, thereby improving the quality and performance of the extension adhesive.

[0075] In one possible implementation, the extension adhesive comprises the following components in parts by weight:

[0076] The composition includes 45-50 parts aliphatic polyurethane acrylate, 10-12 parts modified epoxy acrylate, 12-15 parts fumed silica, 13-23 parts monomer, 3-5 parts thiol monomer, 1-3 parts photoinitiator, 0.05-0.5 parts defoamer, and 0.05-0.5 parts polymerization inhibitor.

[0077] The elongation adhesive prepared using the above-mentioned proportions of components has the advantages of high transparency, high strength, and good toughness.

[0078] In one possible implementation, the extension adhesive also includes color paste.

[0079] The color of the pigment can be added and changed as needed, such as black or other colors, without any specific limitation.

[0080] In the embodiments of the present application, different color pastes can be added to prepare different color extension glue, so as to meet the needs of people for different color extension glue.

[0081] In another aspect, the embodiments of the present application provide a preparation method of the extension glue, which comprises:

[0082] Step 1: according to the mass fraction of each component, the monomer, mercaptan monomer, defoaming agent and polymerization inhibitor are mixed uniformly, then the photoinitiator is added and mixed uniformly.

[0083] According to the mass fraction of each component, the monomer, mercaptan monomer, defoaming agent and polymerization inhibitor are added to the container, mixed uniformly, then the photoinitiator is added, and high-speed stirring is carried out until the photoinitiator is completely dissolved.

[0084] The order of adding the monomer, mercaptan monomer, defoaming agent and polymerization inhibitor can be set and changed as needed, for example, the monomer, mercaptan monomer, defoaming agent and polymerization inhibitor are added in sequence, which is not specifically limited.

[0085] Step 2: continue to add the aliphatic polyurethane acrylate and modified epoxy acrylate, mix uniformly, then add the fumed silica, disperse uniformly, and obtain the extension glue.

[0086] Continue to add the aliphatic polyurethane acrylate and modified epoxy acrylate to the container, disperse uniformly at a temperature of 30-50℃, then continue to add the fumed silica, and high-speed stirring is carried out to disperse the fumed silica uniformly, and obtain the extension glue.

[0087] The order of adding the aliphatic polyurethane acrylate and modified epoxy acrylate can be set and changed as needed, for example, the aliphatic polyurethane acrylate and modified epoxy acrylate are added in sequence, or the modified epoxy acrylate and aliphatic polyurethane acrylate are added in sequence, which is not specifically limited.

[0088] The extension glue prepared by the present application is in the form of semi-solid paste, compared with the traditional liquid extension glue, the extension glue prepared by the present application can save the complicated process of paper support, simplify the process, and the shaped extension glue has the advantages of high transparency, high strength and good toughness.

[0089] In another aspect, the embodiments of the present application provide an application of the extension glue in preparing the extension resin material. For example, the extension glue for nails is prepared to extend the length of the nails.

[0090] In order to make the technical solutions and advantages of the present application clearer, the following will be described in detail through specific embodiments.

[0091] In the following specific examples, the operations involved are carried out under conventional conditions or the conditions recommended by the manufacturer, unless otherwise specified. The raw materials used are conventional products available on the market, unless otherwise specified.

[0092] The aliphatic polyurethane acrylate is selected from Guangzhou Runao Chemical Rahn Chemical Genomer*4205;

[0093] The modified epoxy acrylate is selected from Sartomer CNUVE150 / 80NS;

[0094] The fumed silica is selected from Wacker Silica

[0095] The monomer is selected from ACMO, TMPTMA;

[0096] The thiol monomer is selected from Showa Denko Karenz MT PE1;

[0097] The photoinitiator is selected from Irgacure 184, MBF, TMO, TPO;

[0098] The defoamer is selected from BYK-1790;

[0099] The polymerization inhibitor is selected from N-methylnitroso-N-phenylhydroxylamine aluminum.

[0100] Example 1

[0101] Example 1 provides a lengthening glue, which is prepared by the following method: 18 parts by mass of ACMO, 5 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 parts by mass of BYK-1790, 0.1 parts by mass of N-methylnitroso-N-phenylhydroxylamine aluminum are added to a container, mixed uniformly, then 1 part by mass of Irgacure 184 and 1.8 parts by mass of photoinitiator TMO are added, and stirred until the solids are completely dissolved.

[0102] Continue to add 48 parts by mass of 10 parts by mass of CNUVE150 / 80NS, and disperse uniformly at 30-50°C, then continue to add 12 parts by mass of Disperse until uniform and transparent to obtain the lengthening glue.

[0103] Example 2

[0104] Example 2 provides a lengthening glue, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO are added, and stirring is continued until the solids are completely dissolved.

[0105] Continue to add 45 parts by mass of Genomer*4205, 10 parts by mass of CNUVE150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 15 parts by mass of Disperse to uniform transparency to obtain a lengthening glue.

[0106] Example 3

[0107] Example 3 provides a lengthening glue, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 2 parts by mass of photoinitiator TMO are added, and stirring is continued until the solids are completely dissolved.

[0108] Continue to add 50 parts by mass of 12 parts by mass of CNUVE150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 12 parts by mass of Disperse to uniform transparency to obtain a lengthening glue.

[0109] Example 4

[0110] Example 4 provides a lengthening glue, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 1 part by mass of photoinitiator TMO are added, and stirring is continued until the solids are completely dissolved.

[0111] Continue to add 50 parts by mass of Genomer*4205, 15 parts by mass of CNUVE150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 15 parts by mass of Disperse to uniform transparency to obtain a lengthening glue.

[0112] Example 5

[0113] Example 5 provides an extension gel, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO are added, and stirring is continued until the solids are completely dissolved.

[0114] Continue to add 48 parts by mass of Genomer® 1380, 10 parts by mass of CNUVE 150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 12 parts by mass of PMMA micro powder, and disperse uniformly to obtain the extension gel. 10 parts by mass of CNUVE 150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 12 parts by mass of and 2 parts by mass of self-made black nano color paste, disperse uniformly to obtain the extension gel.

[0115] Comparative Example 1

[0116] Comparative Example 1 provides an extension gel, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO are added, and stirring is continued until the solids are completely dissolved.

[0117] Continue to add 45 parts by mass of Genomer® 4205, 10 parts by mass of CNUVE 150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 15 parts by mass of PMMA micro powder, and disperse uniformly to obtain the extension gel.

[0118] Comparative Example 2

[0119] Comparative Example 2 provides an extension gel, which is prepared by the following method: 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, 0.1 part by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, after uniform mixing, 1 part by mass of photoinitiator MBF and 1 part by mass of photoinitiator TPO are added, and stirring is continued until the solids are completely dissolved.

[0120] Continue to add 50 parts by mass of Genomer * 4205, 15 parts by mass of CNUVE 150 / 80 NS, and disperse uniformly at 30-50°C, then continue to add 15 parts by mass of disperse uniformly to obtain the extension gel.

[0121] Comparative Example 3

[0122] Comparative Example 3 provides an elongation adhesive, which is prepared by the following method: 18 parts by mass of ACMO, 5 parts by mass of TMPTMA, 0.1 parts by mass of BYK-1790, and 0.1 parts by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, mixed evenly, and then 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO are added and stirred until the solid is completely dissolved.

[0123] Continue adding 48 parts by weight Disperse 10 parts by weight of CNUVE150 / 80 NS evenly at 30–50°C, then add 12 parts by weight of... Disperse evenly to obtain extended adhesive.

[0124] Comparative Example 4

[0125] Comparative Example 4 provides an elongation adhesive, which is prepared by the following method: 15 parts by mass of ACMO, 8 parts by mass of TMPTMA, 4 parts by mass of Karenz MT PE1, 0.1 parts by mass of BYK-1790, and 0.1 parts by mass of N-nitroso-N-phenylhydroxylamine aluminum are added to a container, mixed evenly, and then 1 part by mass of photoinitiator MBF and 1.8 parts by mass of photoinitiator TMO are added and stirred until the solid is completely dissolved.

[0126] Continue adding 55 parts by weight of Genomer*4205, disperse evenly at 30-50°C, and then add 15 parts by weight of... Disperse until uniform and transparent to obtain extended adhesive.

[0127] The formulations of Examples 1-5 and Comparative Examples 1-4 can also be found in Table 1 below.

[0128] Table 1

[0129] Application Examples

[0130] Material: ABS false nail tips.

[0131] Process: ABS artificial nail tip → coating with extension glue → curing with 120W LED light (model: SUN X5 Max) for 60 seconds.

[0132] Test nails were made according to the above film-forming conditions. After completion, the nails were left to stand for 48 hours to cure before testing. The test results are shown in Table 2 below.

[0133] Table 2

[0134] The transferability test conditions are as follows:

[0135] Since the boiling point of the photoinitiator TPO and TMO is greater than 500 DEG C, GC-MS chromatography-mass spectrometry cannot be used, therefore, the extraction ultraviolet absorption method with high reproducibility is used in the present application.

[0136] 0.025g of the cured film prepared by using different photoinitiators is weighed, dissolved in 20mL of acetonitrile, and the absorbance of the solution is determined by using a PerkinElmer LAMBDA 1050+ ultraviolet-visible-near infrared spectrophotometer at 25 DEG C for 12h, according to the Lambert-Beer law: A=kbc, wherein A is the absorption intensity at the maximum absorption wavelength, k is the molar extinction coefficient at the maximum absorption wavelength, b=1cm, and c is the concentration of the initiator. The mass N1 of the initiator migrated out is calculated, N0 is the added amount of the initiator, and the migration rate N is calculated according to the following formula: N=N1 / N0x100%.

[0137] As can be seen from Table 2, PMMA micro powder is added in Comparative Example 1, the prepared extension glue has fluidity, the appearance of the finished product is slightly turbid, and the bending resistance is poor. In Comparative Example 2, TPO and MBF are used as the photoinitiator, the prepared extension glue has poor alcohol resistance and water resistance, and has high migration. In Example 5, the extension glue prepared by adding color paste can better meet the color adding performance. The difference between Comparative Example 3 and Example 5 is that no mercaptan monomer Karenz MT PE1 is added, and the prepared extension glue has poor curing effect. In Comparative Example 4, only aliphatic polyurethane acrylate is used, and no modified epoxy acrylate is added, the prepared extension glue has slow curing speed, low gloss, low hardness, and poor solvent resistance.

[0138] The performance of the extension glue prepared in Examples 1-5 is obviously better than that of the extension glue prepared in Comparative Examples 1-4, therefore, the extension glue prepared in the present application has the characteristics of transparent fullness, high colloidal strength, bending resistance, good color adding deep curing, and low migration.

[0139] In summary, the aliphatic polyurethane acrylate, modified epoxy acrylate, fumed silica, monomer, mercaptan monomer, photoinitiator, and polymerization inhibitor are compounded, and the amount of each component is limited, so that each component fully plays a synergistic role, and finally the extension glue has the characteristics of transparent fullness, high colloidal strength, bending resistance, good color adding deep curing, and low migration. The adjustment of a single resin, filler, and photoinitiator cannot achieve the above-mentioned effects.

Claims

1. An elongated glue, wherein, The lengthening glue comprises the following components in mass fraction: aliphatic polyurethane acrylate 40-50 parts, modified epoxy acrylate 10-20 parts, fumed silica 10-20 parts, monomer 5-25 parts, thiol monomer 3-8 parts, photoinitiator 1-5 parts, defoaming agent 0.02-0.5 parts, polymerization inhibitor 0.02-0.5 parts.

2. The elongated glue of claim 1, wherein, The fumed silica is a hydrophobic fumed silica having a specific surface area of 100 m 2 / g to 200 m 2 / g.

3. The elongated glue of claim 1, wherein, The monomer is selected from at least one of a methacrylate monomer and an acrylamide monomer.

4. The elongated glue of claim 3 wherein, The monomer is selected from at least one of hydroxyethyl methacrylate, acryloyl morpholine, N,N-dimethyl acrylamide, and trimethylolpropane trimethacrylate.

5. The elongated glue of claim 1, wherein, The photoinitiator is selected from at least one of a first photoinitiator and a second photoinitiator; The first photoinitiator has an absorption wavelength range of 250-350 nm; The second photoinitiator has an absorption wavelength range of 350-450 nm.

6. The elongated glue of claim 5 wherein, 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 2,4,6-trimethylbenzoyl phenyl phosphinic acid ethyl ester, phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide, and 2,4,6-trimethylbenzoyl-di(p-tolyl) phosphine oxide.

7. The elongated glue of claim 1 wherein, The thiol monomer is selected from a primary thiol or a secondary thiol.

8. The elongated glue of claim 1, wherein, The polymerization inhibitor is selected from at least one of 2,6-di-tert-butyl-p-cresol, N-nitroso-N-phenylhydroxylamine aluminum, BASF BHT®, and BHT®.

9. A method of preparing an extended glue, wherein, The lengthening glue is as claimed in any one of claims 1-8, and the preparation method comprises: The monomer, the thiol monomer, the defoaming agent, and the polymerization inhibitor are mixed uniformly according to the mass fraction of each component, and then the photoinitiator is added and mixed uniformly; The aliphatic polyurethane acrylate and the modified epoxy acrylate are continuously added, mixed uniformly, and then the fumed silica is added and dispersed uniformly to obtain the lengthening glue.

10. Use of an extender gum in the preparation of an extended resin material, wherein, The lengthening glue is as claimed in any one of claims 1-8.

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