Eyelash grafting instant dry adhesive and preparation method thereof

Abstract

The invention discloses an eyelash grafting instant-drying adhesive and a preparation method thereof, and belongs to the field of daily chemicals, the eyelash grafting instant-drying adhesive is prepared from the following raw materials: ethyl alpha-cyanoacrylate, a polymethacrylate polymer, toughening rubber, a reinforcing agent and a stabilizing agent, the ethyl alpha-cyanoacrylate is added into a stirring kettle, stirring is started, and the mixture is stirred uniformly; the instant-dry adhesive is obtained by sequentially adding the toughening rubber, the reinforcing agent and the stabilizing agent, adding the polymethacrylate polymer, heating and stirring, has the advantages of being high in speed, low in irritation, soft, long in durability and the like in the aspect of planting false eyelashes, is high in bonding strength and high in attaching and positioning speed, and can meet the requirement of rapid operation of eyelash beautifiers.

Description

Technical Field

[0001] This invention relates to an adhesive and its preparation method, specifically to an instant-drying adhesive for eyelash extensions and its preparation method, belonging to the field of daily chemical products. Background Technology

[0002] Eyelashes are neatly arranged hairs that grow along the eyelid rim. They serve to block foreign objects and protect the eyeball. They are arranged in a semi-circular shape, with upper eyelid eyelashes being longer and denser than lower eyelid eyelashes. Eyelashes enhance the contours of the eyes, adding to their expressiveness, and are one of the areas used for facial enhancement.

[0003] Methods to enhance eyelash beauty include eyelash extensions, which involve using eyelash glue to attach false eyelashes to the existing eyelashes. This allows you to have long, curled eyelashes without the need for mascara, and the extensions can be designed to be individually separated and realistic according to your eye shape, instantly making your eyes more expressive and captivating without the need for makeup.

[0004] However, traditional eyelash glue takes a long time to fully harden, resulting in poor performance and potential irritation to the eyes during use.

[0005] Instant adhesives, also known as blister adhesives, are mainly composed of α-cyanoacrylate adhesives. They are single-component, low-viscosity, transparent, and room-temperature fast-curing adhesives with good adhesion to most materials. They are one of the important room-temperature curing adhesives and are widely used in adhesives, coatings, functional materials and other industries. However, they have poor water resistance, high brittleness, low temperature resistance, short shelf life and poor durability. Therefore, those skilled in the art urgently need to improve the basic properties of existing instant adhesives to meet the needs of market development. Summary of the Invention

[0006] In view of this, the present invention provides an instant-drying adhesive for eyelash extensions and a method for preparing the same, in order to solve the above-mentioned problems existing in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An instant-drying adhesive for eyelash extensions is prepared from the following raw materials in parts by weight: 80-100 parts of ethyl α-cyanoacrylate, 0-12 parts of polymethyl methacrylate polymer, 0.5-10 parts of toughening rubber, 0.001-0.01 parts of reinforcing agent, and 0.0001-0.1 parts of stabilizer.

[0009] This invention also provides a method for preparing the above-mentioned instant eyelash extension adhesive, the steps of which are as follows:

[0010] (1) Add ethyl α-cyanoacrylate to the mixing tank according to the weight parts, start stirring, and add toughening rubber, reinforcing agent and stabilizer in sequence;

[0011] (2) Add polymethyl methacrylate polymer, heat and stir to obtain the product.

[0012] The stirring speed in step (1) is 45 RPM;

[0013] The heating in step (2) is to heat to 55-60℃, the stirring time is 4-6 hours, and the speed is 400 RPM.

[0014] Based on the above technical solution, the present invention also has the following further solutions:

[0015] Furthermore, the reinforcing agent is prepared from the following raw materials in parts by weight: 5 parts ether, 5 parts butyl acetate, 5 parts ethyl acetate, and 85 parts ethyl α-cyanoacrylate.

[0016] The preparation method is as follows: add butyl acetate and ethyl acetate into a stirred tank, turn on the stirrer, add ethyl α-cyanoacrylate, continue stirring, add ether dropwise into the stirred tank, and stir until the system is transparent and uniform.

[0017] The term "starting the stirrer" refers to starting the stirrer at a speed of 45 RPM, and "continuing to stir" refers to adjusting the speed to 100 RPM and continuing to stir.

[0018] Furthermore, the stabilizer is prepared from the following raw materials in parts by weight: 0.5 parts sulfur dioxide, 0.5 parts boron trifluoride ethyl ether, and 99 parts α-cyanoacrylate.

[0019] The preparation method is as follows: Ethyl α-cyanoacrylate is added to a stirred tank, the stirrer is turned on, sulfur dioxide is added while stirring, boron trifluoride ether is added dropwise, and stirring is continued until the system is transparent and uniform.

[0020] The term "starting the stirrer" refers to starting the stirrer at a speed of 45 RPM, and "continuing to stir" refers to adjusting the speed to 100 RPM and continuing to stir.

[0021] The beneficial effects of this invention are as follows: the instant adhesive of this invention has the advantages of fast speed, low irritation, softness and long durability in the application of false eyelashes. It has high bonding strength, fast application and positioning speed and can meet the needs of eyelash technicians for fast operation. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the following examples, the raw materials for preparing the reinforcing agent are: 5g ether, 5g butyl acetate, 5g ethyl acetate, and 85g ethyl α-cyanoacrylate.

[0024] The preparation method is as follows: add butyl acetate and ethyl acetate into a stirred tank, turn on the stirrer at 45 RPM, add ethyl α-cyanoacrylate, adjust the stirring speed to 100 RPM, add ether dropwise into the stirred tank, and stir at 100 RPM until the system is transparent and uniform.

[0025] The raw materials for preparing the stabilizer are: 0.5g sulfur dioxide, 0.5g boron trifluoride ethyl ether, and 99g α-cyanoacrylate;

[0026] The preparation method is as follows: weigh ethyl α-cyanoacrylate into a stirred tank, add sulfur dioxide while stirring at 45 RPM, add boron trifluoride diethyl ether dropwise, and stir at 100 RPM until the system is transparent and uniform.

[0027] Example 1

[0028] The preparation method and steps for an instant-drying eyelash extension adhesive are as follows:

[0029] (1) Weigh out the raw materials as follows: 94g of α-cyanoacrylate, 5g of polymethyl methacrylate polymer, 1g of toughening rubber, 0.005g of reinforcing agent, and 0.0001g of stabilizer.

[0030] (2) Add ethyl α-cyanoacrylate to the stirred tank, turn on the stirring and stir at a speed of 200 RPM, and then add the reinforcing agent and stabilizer;

[0031] (3) Add toughening rubber and polymethyl methacrylate polymer, heat to 55-60℃, stir at 300RPM when heating, and adjust the stirring rate to 400RPM after heating. Stir for 5 hours to obtain the eyelash grafting instant adhesive.

[0032] The test results for the adhesive are as follows:

[0033] Grafting speed: Single eyelash grafting is positioned in 2 seconds, according to the standard test of "HG / T2492-2018a-Ethyl Cyanoacrylate Instant Adhesive".

[0034] Soft test: Moderately soft, based on actual operating experience.

[0035] Durability test: 7-8 weeks. Test method: Apply eyelash extensions to a real person and observe the rate and amount of eyelash loss.

[0036] Allergy test: A small amount of adhesive was applied to the thin and delicate skin behind the ear of a test subject with no history of allergies. The test subjects were observed for 2-3 hours. No redness, swelling or itching was observed.

[0037] Example 2

[0038] The preparation steps for eyelash extension instant adhesive are as follows:

[0039] (1) Weigh out the raw materials as follows: 92g of α-cyanoacrylate, 5g of polymethyl methacrylate polymer, 3g of toughening rubber, 0.005g of reinforcing agent, and 0.0001g of stabilizer.

[0040] (2) Add ethyl α-cyanoacrylate to the stirred tank, turn on the stirring and stir at a speed of 200 RPM, and then add the reinforcing agent and stabilizer;

[0041] (3) Add toughening rubber and polymethyl methacrylate polymer, heat to 55-60℃, stirring at 300 RPM during heating, then adjust the stirring rate to 400 RPM after heating, and stir for 5 hours to obtain the eyelash grafting instant adhesive. The test results of this adhesive are as follows:

[0042] Grafting speed: Single eyelash grafting is positioned in 2 seconds, according to the standard test of "HG / T2492-2018a-Ethyl Cyanoacrylate Instant Adhesive".

[0043] Soft test: Highly flexible, based on actual user experience.

[0044] Durability test: 6-7 weeks. Test method: Apply eyelash extensions to a real person and observe the rate and amount of eyelash loss.

[0045] Allergy test: A small amount of adhesive was applied to the thin and delicate skin behind the ear of a test subject with no history of allergies. The test subjects were observed for 2-3 hours. No redness, swelling or itching was observed.

[0046] Example 3

[0047] The preparation steps for eyelash extension instant adhesive are as follows:

[0048] (1) Weigh out the raw materials as follows: 94g of α-cyanoacrylate, 5g of polymethyl methacrylate polymer, 1g of toughening rubber, 0.02g of reinforcing agent, and 0.0001g of stabilizer.

[0049] (2) Add ethyl α-cyanoacrylate to the stirred tank, turn on the stirring and stir at a speed of 200 RPM, and then add the reinforcing agent and stabilizer;

[0050] (3) Add toughening rubber and polymethyl methacrylate polymer, heat to 55-60℃, stirring at 300 RPM during heating, then adjust the stirring rate to 400 RPM after heating, and stir for 5 hours to obtain the eyelash grafting instant adhesive. The test results of this adhesive are as follows:

[0051] Grafting speed: Single eyelash grafting takes 1-2 seconds to position, according to the standard test of "HG / T2492-2018a-Ethyl Cyanoacrylate Instant Adhesive".

[0052] Soft test: Moderately soft, based on actual operating experience.

[0053] Durability test: 5-6 weeks. Test method: Apply eyelash extensions to a real person and observe the rate and amount of eyelash loss.

[0054] Allergy test: A small amount of adhesive was applied to the thin and delicate skin behind the ear of a test subject with no history of allergies. The test subjects were observed for 2-3 hours. No redness, swelling or itching was observed.

[0055] Example 4

[0056] The preparation steps for eyelash extension instant adhesive are as follows:

[0057] (1) Weigh out the raw materials as follows: 94g of α-cyanoacrylate, 5g of polymethyl methacrylate polymer, 1g of toughening rubber, 0.01g of reinforcing agent, and 0.0001g of stabilizer.

[0058] (2) Add ethyl α-cyanoacrylate to the stirred tank, turn on the stirring and stir at a speed of 200 RPM, and then add the reinforcing agent and stabilizer;

[0059] (3) Add toughening rubber and polymethyl methacrylate polymer, heat to 55-60℃, stirring at 300 RPM during heating, then adjust the stirring rate to 400 RPM after heating, and stir for 5 hours to obtain the eyelash grafting instant adhesive. The test results of this adhesive are as follows:

[0060] Grafting speed: Single eyelash grafting takes 0.5-1 second to position, according to the standard test of "HG / T2492-2018a-Ethyl Cyanoacrylate Instant Adhesive".

[0061] Soft test: Moderately soft, based on actual operating experience.

[0062] Durability test: 4-5 weeks. Test method: Apply eyelash extensions to a real person and observe the speed and amount of eyelash loss.

[0063] Allergy test: A small amount of adhesive was applied to the thin and delicate skin behind the ear of a test subject with no history of allergies. The test subjects were observed for 2-3 hours. No redness, swelling or itching was observed.

[0064] Example 5

[0065] The physicochemical and microbiological indicators of the eyelash extension adhesives prepared in Examples 1-4 were tested in accordance with the "Cosmetic Safety Technical Specifications" (2015 edition), and the results are shown in Table 1.

[0066] Table 1 Physicochemical and Microbiological Indicators

[0067]

Claims

1. An instant-drying adhesive for eyelash extensions, characterized in that, It is prepared from the following raw materials in parts by weight: 80-100 parts of α-cyanoacrylate, 0-12 parts of polymethacrylate polymer, 0.5-10 parts of toughening rubber, 0.001-0.01 parts of reinforcing agent, and 0.0001-0.1 parts of stabilizer.

2. The instant-drying eyelash extension adhesive according to claim 1, characterized in that, The reinforcing agent is prepared from the following raw materials in parts by weight: 5 parts ether, 5 parts butyl acetate, 5 parts ethyl acetate, and 85 parts ethyl α-cyanoacrylate.

3. The instant-drying eyelash extension adhesive according to claim 1, characterized in that, The stabilizer is prepared from the following raw materials in parts by weight: 0.5 parts sulfur dioxide, 0.5 parts boron trifluoride ethyl ether, and 99 parts ethyl α-cyanoacrylate.

4. A method for preparing an instant eyelash extension adhesive, characterized in that, Here are the steps: (1) Add ethyl α-cyanoacrylate to the mixing tank according to the weight parts, start stirring, and add toughening rubber, reinforcing agent and stabilizer in sequence; (2) Add polymethyl methacrylate polymer, heat and stir to obtain the product.

5. The method for preparing the instant-drying adhesive for eyelash extensions according to claim 4, characterized in that, The stirring speed in step (1) is 100 RPM; The heating in step (2) is to heat to 55-60℃, the stirring time is 4-6 hours, and the speed is 400 RPM.

6. The method for preparing the instant-drying adhesive for eyelash extensions according to claim 4 or 5, characterized in that, The preparation method of the reinforcing agent is as follows: Add butyl acetate and ethyl acetate to a stirred tank, turn on the stirrer, add ethyl α-cyanoacrylate, continue stirring, add ether dropwise to the stirred tank, and stir until the system is transparent and uniform.

7. The method for preparing the instant eyelash extension adhesive according to claim 6, characterized in that, The stirring is started at a speed of 45 RPM, and stirring is continued at a speed of 100 RPM.

8. The method for preparing the instant-drying adhesive for eyelash extensions according to claim 4 or 5, characterized in that, The stabilizer is prepared as follows: Add ethyl α-cyanoacrylate to a stirred tank, turn on the stirrer, add sulfur dioxide while stirring, add boron trifluoride diethyl ether dropwise, and continue stirring until the system is transparent and uniform.

9. The method for preparing the instant-drying adhesive for eyelash extensions according to claim 8, characterized in that, The stirring is started at a speed of 45 RPM, and stirring is continued at a speed of 100 RPM.

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