Secondary curing UV adhesive and artificial nail

Abstract

The invention relates to a secondary curing UV adhesive and an artificial nail. The UV adhesive comprises aliphatic polyurethane acrylic resin, modified polyurethane acrylic resin, a reactive diluent, a photoinitiator, a polymerization inhibitor, a curing agent and a catalyst. The problems that in the prior art, an artificial nail is insufficient in pasting fastness, short in wearing service life, difficult to remove and the like are solved, and the artificial nail with the secondarily-cured UV glue can be conveniently selected and worn by a user for a short time and a long time.

Description

Technical Field

[0001] The present invention relates to a secondary curing UV glue and an artificial nail, belonging to the field of artificial nails. Background Art

[0002] With the development of the nail industry, artificial nails are being used more and more widely. At present, the materials used to paste artificial wearable nails on the market mainly include jelly glue, pressure-sensitive glue, double-sided tape and quick-drying glue. Although these materials can paste artificial nails on the human body, they have some shortcomings. Jelly glue, pressure-sensitive glue and double-sided tape have limited adhesion strength between plastic and human body, resulting in a short wearing life of artificial nails. Although quick-drying glue has a relatively long wearing time, it is not easy to remove the nails, which causes greater damage to the human body.

[0003] There are currently some invention patents to solve the problems of limited adhesion of artificial nails, short wearing life, and difficulty in removing nails.

[0004] For example: CN115887291A discloses a nail wear glue and its preparation method. Through the combination of specific components, it can be formed into a soft colloidal intermediate after thermal curing, and has a certain strength. It can be applied on the release material by coating, and then pre-cut with a mold or drip glue / sprayed to different thicknesses and sizes. It is convenient to store and has a certain viscosity. Therefore, when using it, the user can use the back glue or soft nail piece to perfectly fit the intermediate on the nail. After cutting to the actual size, it only needs to be irradiated once under a UV nail lamp to complete the curing. However, the patent still has the problem of further optimizing the ratio of hydroxyl thermosetting resin and hydroxyl-containing UV resin to ensure more stable performance and quality of the product.

[0005] CN118852999A discloses a UV double-sided adhesive that can be photocured for a second time. The adhesive layer is added with a fluorine-modified core-shell polyacrylic acid modified resin. On the one hand, the light curing stability of the adhesive layer of the present invention can be improved, and the light curing time is shorter during the actual use of the second curing; on the other hand, under the premise of ensuring excellent adhesion in actual use, the adhesive is waterproof, easy to peel, and does not leave marks. However, the patent still has the problem of further optimizing the formula of the glue, improving the weather resistance, oxidation resistance and corrosion resistance of the glue, as well as the adhesion, water resistance, oil resistance and wear resistance of the glue.

[0006] In order to solve the above problems, the present invention provides a secondary curable UV glue for artificial nails and an application method thereof. The UV glue is composed of components such as aliphatic polyurethane acrylic resin, modified polyurethane acrylic resin, reactive diluent, photoinitiator, polymerization inhibitor, curing agent and catalyst. By fixing the UV glue to the fitting surface between the artificial nail and the human body nail, it is not only convenient for users to wear it anytime and anywhere, but also the curing method can be selected according to needs, thus solving the problem of the wearing time of artificial nails in the prior art. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a secondary curable UV glue for artificial nails and an application method thereof. The UV glue is composed of components such as aliphatic polyurethane acrylic resin, modified polyurethane acrylic resin, reactive diluent, photoinitiator, polymerization inhibitor, curing agent and catalyst. By fixing the UV glue to the fitting surface between the artificial nail and the human body nail, it is not only convenient for users to wear it anytime and anywhere, but also the curing method can be selected according to needs, thus solving the problem of the wearing time of artificial nails in the prior art.

[0008] In order to achieve the above object, the present invention provides a secondary curable UV glue for artificial nails, which comprises the following components in parts by weight: - Aliphatic polyurethane acrylic resin: 45-75 parts - Modified polyurethane acrylic resin: 10-25 parts - Active diluent: 5-15 parts - Photoinitiator: 2-3 parts - Inhibitor: 0.01-0.05 parts - Curing agent: 0.1-0.5 parts - Catalyst: 0.01-0.3 parts The aliphatic polyurethane acrylic resin is obtained by mixing acrylic fatty polyurethane and isooctyl acrylate; The modified polyurethane acrylic resin is obtained by copolymerization of acrylate and carbamate; The active diluent is isobornyl acrylate.

[0009] A UV adhesive composition film, characterized in that the UV adhesive composition is cured secondary.

[0010] An artificial nail comprises an artificial nail body and a UV adhesive film, wherein the UV adhesive film is the UV adhesive composition film.

[0011] In addition, the present invention also provides an application method of the secondary curable UV glue for artificial nails, which comprises the following steps in sequence: 1. Degas the prepared semi-finished product of secondary curable UV adhesive through a vacuum centrifuge; 2. Coat on the black light-proof release film through a coating machine in a light-proof environment; 3. After infrared baking at 80-100℃; 4. After being online, it is covered with a black light-proof heavy release film; 5. Finally, roll up to obtain the finished product of secondary curable UV adhesive; 6. The prepared secondary curable UV glue product is die-cut according to the specific size of the artificial nail shape.

[0012] When in use, a glue sticking machine is used to remove the die-cut secondary curable UV glue from the light release film surface together with the heavy release film and stick them on the artificial nail and human nail sticking surface.

[0013] After getting the nails, consumers can remove the release film and wear them directly for a short time. They can also use a UV lamp to cure the UV film for a second time to extend the wearing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional structure of an artificial nail according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0015] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below. The word "exemplary" used herein means "used as an example, embodiment or illustrative". Any embodiment described herein as "exemplary" is not necessarily to be interpreted as being superior or better than other embodiments.

[0016] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In other examples, methods, means, equipment and steps well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present disclosure.

[0017] In this specification, the term “(meth)acrylate” includes the meanings of “acrylate” and “methacrylate”; the term “(meth)acrylic acid” includes the meanings of “acrylic acid” and “methacrylic acid”.

[0018] Unless otherwise stated, the units used in this specification are all international standard units, and the numerical values ​​and numerical ranges appearing in this disclosure should be understood to include the inevitable systematic errors in industrial production.

[0019] In this specification, unless otherwise specified, "%" means mass percentage.

[0020] In this specification, the word "may" includes both performing a certain process and not performing a certain process.

[0021] In this specification, the references to "some specific / preferred embodiments", "other specific / preferred embodiments", "embodiments", etc., mean that the specific elements (e.g., features, structures, properties and / or characteristics) described in connection with the embodiments are included in at least one embodiment described herein, and may or may not exist in other embodiments. In addition, it should be understood that the elements may be combined in various embodiments in any suitable manner.

[0022] In this specification, the numerical range expressed using "a numerical value A to a numerical value B" means a range including the endpoint numerical values ​​A and B.

[0023] See attached Figure 1 , the artificial nail 1 is bonded to the UV adhesive film 2, and the UV adhesive film 2 is bonded to the release film 3. When in use, the release film 3 can be peeled off, so that the UV adhesive film 2 is bonded to the human fingernail 4.

[0024] When temporarily worn, the UV film 2 can be directly bonded to the human fingernail 4. When it is needed to be worn for a long time, after the UV film 2 is bonded to the human fingernail 4, it can be irradiated with ultraviolet light to achieve secondary curing. Embodiment 1

[0025] A method for preparing a secondary curable UV glue for artificial nails, comprising the following steps: 1. Prepare a secondary curable UV adhesive, which includes the following components in parts by weight: - 55 parts of aliphatic polyurethane acrylic resin, obtained by mixing acrylic fatty polyurethane and isooctyl acrylate in a ratio of 0.8:0.2; - 18 parts of modified polyurethane acrylic resin, obtained by copolymerization of acrylate and urethane; - 10 parts of reactive diluent isobornyl acrylate; - 2.5 parts of photoinitiator TPO; - 0.03 parts of N-nitroso-N-phenylhydroxylamine aluminum inhibitor; - Curing agent HDI isocyanate trimer 0.3 parts; - Catalyst T12 dibutyltin dilaurate 0.15 parts; 2. Add the above raw materials in the prescribed weight portions in sequence and stir and mix for 2 hours to form a uniform UV adhesive semi-finished product; 3. Perform vacuum degassing on the semi-finished UV adhesive for 30 minutes to remove the bubbles; 4. In a dark and light-proof environment, the debubbled UV adhesive semi-finished product is evenly coated on the black light-proof light release film by a coating machine, with a coating thickness of 0.5mm; 5. Bake the coated UV glue semi-finished product in 90℃ infrared oven for 20 minutes; 6. After being automatically covered with a black light-proof heavy release film online and finally rolled up, the finished product of the secondary curable UV adhesive is obtained; 7. According to the specific size of artificial nails, the prepared secondary curable UV glue product is die-cut to a size of 10mm×15mm; 8. Use a glue machine to remove the die-cut secondary curable UV glue from the light release film surface together with the heavy release film, and stick it on the adhesive surface of the artificial nail and the human nail. Embodiment 2

[0026] A method for preparing a secondary curable UV glue for artificial nails, comprising the following steps: 1. Prepare a secondary curable UV adhesive, which includes the following components in parts by weight: - 65 parts of aliphatic polyurethane acrylic resin, obtained by mixing acrylic fatty polyurethane and isooctyl acrylate in a ratio of 0.8:0.2; - 15 parts of modified polyurethane acrylic resin, obtained by copolymerization of acrylate and urethane; - 8 parts of reactive diluent isobornyl acrylate; - 2.8 parts of photoinitiator TMO; - 0.04 parts of N-nitroso-N-phenylhydroxylamine aluminum inhibitor; - Curing agent HDI isocyanate trimer 0.4 parts; - Catalyst T12 dibutyltin dilaurate 0.2 parts; 2. Add the above raw materials in the prescribed weight portions in sequence and stir and mix for 1.5 hours to form a uniform UV adhesive semi-finished product; 3. Perform vacuum degassing on the semi-finished UV adhesive for 45 minutes to remove the bubbles; 4. In a dark and light-proof environment, the debubbled UV adhesive semi-finished product is evenly coated on the black light-proof light release film by a coating machine, with a coating thickness of 0.6mm; 5. Bake the coated UV glue semi-finished product in 95℃ infrared oven for 25 minutes; 6. After being automatically covered with a black light-proof heavy release film online and finally rolled up, the finished product of the secondary curable UV adhesive is obtained; 7 According to the specific size of artificial nail shape, the prepared secondary curable UV glue finished product is die-cut, and the die-cutting size is 12mm×18mm; 8. Use a glue machine to remove the die-cut secondary curable UV glue from the light release film surface together with the heavy release film, and stick it on the adhesive surface of the artificial nail and the human nail. Embodiment 3

[0027] A method for preparing a secondary curable UV glue for artificial nails, comprising the following steps: 1. Prepare a secondary curable UV adhesive, which includes the following components in parts by weight: - 50 parts of aliphatic polyurethane acrylic resin, obtained by mixing acrylic fatty polyurethane and isooctyl acrylate in a ratio of 0.8:0.2; - 20 parts of modified polyurethane acrylic resin, obtained by copolymerization of acrylate and urethane; - 12 parts of reactive diluent isobornyl acrylate; - Photoinitiator TPO 2.2 parts; - 0.02 parts of N-nitroso-N-phenylhydroxylamine aluminum inhibitor; - Curing agent HDI isocyanate trimer 0.2 parts; - Catalyst T12 dibutyltin dilaurate 0.1 part; 2. Add the above raw materials in the prescribed weight portions in sequence and stir and mix for 2.5 hours to form a uniform UV adhesive semi-finished product; 3. Perform vacuum degassing on the semi-finished UV glue product for 20 minutes to remove the bubbles; 4. In a dark and light-proof environment, the debubbled UV adhesive semi-finished product is evenly coated on the black light-proof light release film by a coating machine, with a coating thickness of 0.4mm; 5. Bake the coated UV glue semi-finished product in 85℃ infrared oven for 18 minutes; 6. After being automatically covered with a black light-proof heavy release film online and finally rolled up, the finished product of the secondary curable UV adhesive is obtained; 7. According to the specific size of artificial nail shape, the prepared secondary curable UV glue product is die-cut, and the die-cutting size is 8mm×12mm; 8. Use a glue machine to remove the die-cut secondary curable UV glue from the light release film surface together with the heavy release film, and stick it on the adhesive surface of the artificial nail and the human nail.

[0028] When using, the die-cut secondary curable UV adhesive can be attached to the bottom surface of the artificial nail. When consumers need to use it for a short period of time, they can remove the release film and wear it directly. When they need to use it for a long time, they can remove the release film and wear it, and then use ultraviolet light to cure the UV adhesive for a second time to extend the use time.

[0029] The above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not intended to limit the implementation methods of the present disclosure. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the claims of the present disclosure.

Claims

1. A secondary curing UV adhesive composition, characterized in that: The composition comprises the following components in parts by weight: Aliphatic polyurethane acrylic resin: 45-75 parts; Modified polyurethane acrylic resin: 10-25 parts; Active diluent: 5-15 parts; Photoinitiator: 2-3 parts; Inhibitor: 0.01-0.05 parts; Curing agent: 0.1-0.5 parts; Catalyst: 0.01-0.3 parts.

2. The secondary curing UV adhesive composition according to claim 1, characterized in that: The aliphatic polyurethane acrylic resin is obtained by mixing acrylic fatty polyurethane and isooctyl acrylate.

3. The secondary curing UV adhesive composition according to claim 1, characterized in that: The modified polyurethane acrylic resin is obtained by copolymerization of acrylate and carbamate.

4. The secondary curing UV adhesive composition according to claim 1, characterized in that: The active diluent is isobornyl acrylate.

5. A UV adhesive composition film, characterized in that: It comprises the secondary curing UV adhesive composition according to any one of claims 1 to 4.

6. An artificial nail, characterized in that: The artificial nail comprises: Artificial nail body, as well as, UV adhesive film, wherein the UV adhesive film is the UV adhesive composition film according to claim 5.

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