A high-permeability adhesive low-sensitivity adhesive patch and its preparation method

Abstract

This application discloses a highly breathable, viscous, low-sensitivity adhesive patch and its preparation method, relating to the technical field of medical adhesive patches. This application utilizes a modified polyacrylate resin obtained by copolymerizing methacrylate-based siloxane with a fluorinated acrylate. This modified polyacrylate resin is then blended with ethanol, water, a molecular sieve, and a crosslinking agent to form a colloid. Finally, the colloid is bonded to a fabric substrate, and a release paper is applied to the side of the colloid facing away from the fabric substrate to produce the adhesive patch. This adhesive patch exhibits excellent high breathability and low sensitivity, as well as good water resistance, and has broad application prospects and a broad market for medical adhesive patches and other applications.

Description

Technical Field

[0001] The present application relates to the technical field of medical adhesive patches, and in particular to a highly breathable, viscous, low-sensitivity adhesive patch and a preparation method thereof. Background Art

[0002] In the medical and healthcare fields, increasing awareness of health and safety is driving higher demands on products that come into direct contact with the skin, such as medical patches. High breathability and hypoallergenic properties are particularly important for medical patches or dressings that are worn for extended periods. High breathability ensures the skin can breathe properly, reducing discomfort or allergic reactions caused by sweat and moisture accumulation. Hypoallergenic properties mean that the product itself will not cause allergic reactions or irritation during use, making it particularly suitable for people with sensitive skin. Therefore, developing a highly breathable, adhesive, hypoallergenic patch is crucial.

[0003] Chinese patent application publication number CN 106361496 A discloses a breathable medical tape comprising a waterproof layer, a backing layer, an adhesive layer, and a release paper layer arranged in sequence from top to bottom. The adhesive layer has protrusions arranged vertically and horizontally and evenly arranged above the release paper layer. Breathing holes are evenly distributed on the backing layer corresponding to the gaps between the protrusions, and the breathing holes penetrate the surface of the waterproof layer.

[0004] However, the breathable medical tape produced by this solution has a complex structure and its performance still has room for improvement. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this application provides a highly breathable, viscous, low-sensitivity adhesive patch and its preparation method. The method comprises copolymerizing methacrylate-based siloxane with a fluorinated acrylate to produce a modified polyacrylate resin. This modified polyacrylate resin is then blended with ethanol, water, a molecular sieve, and a crosslinking agent to form a gelatin. Finally, the gelatin is bonded to a fabric substrate to produce the adhesive patch. The adhesive patch exhibits excellent high breathability and low sensitivity, and has broad application prospects and markets in medical applications and other areas.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a highly breathable, low-sensitivity adhesive patch comprising a fabric substrate, a colloid bonded to the fabric substrate, and a release paper bonded to the colloid on a side facing away from the fabric substrate. The fabric substrate comprises any one of cotton, non-woven, and Johnson & Johnson fabrics; the release paper comprises any one of release paper, glassine paper, and silicone paper; the colloid is prepared by blending a modified polyacrylate resin, ethanol, water, molecular sieves, a crosslinking agent, and a tackifier; the modified polyacrylate resin is copolymerized from methacrylate-based siloxane and fluorinated acrylate;

[0008] The structure of the methacrylate siloxane comprises:

[0009] ;

[0010] Wherein R'' represents a substituent on the oxygen to which it is attached, including the following structures:

[0011] .

[0012] In a second aspect, the present application provides a method for preparing a highly breathable, viscous, low-sensitivity adhesive patch, comprising:

[0013] Add modified polyacrylate resin, ethanol, water, molecular sieve, crosslinking agent and tackifier into reactor I, stir and blend at 50-60° C. under nitrogen protection for 2-4 hours, and cool and discharge to obtain the colloid;

[0014] Finally, the glue is coated on the substrate by a glue coating machine, dried at 80-90° C., and then a release paper is attached to the side of the glue facing away from the fabric substrate to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0015] The method for preparing the above-mentioned highly breathable adhesive low-sensitivity adhesive patch further comprises preparing a modified polyacrylate resin:

[0016] First, add methacrylate siloxane, fluorinated acrylate and solvent A into reactor II, stir under nitrogen protection, and heat to 150-160°C;

[0017] Then, initiator and chain transfer agent were added to reactor II, and reflux reaction was carried out at 150-160°C under nitrogen protection for 2-3 hours;

[0018] Then the temperature is lowered to 50-70°C and the material is discharged to obtain modified polyacrylate resin.

[0019] Beneficial technical effects:

[0020] This application innovatively uses methacrylate-based siloxane and fluorine-containing acrylate to copolymerize to obtain a modified polyacrylate resin having a large number of carbon-fluorine bond structures and siloxane structures. The modified polyacrylate resin is blended with ethanol, water, molecular sieves and a cross-linking agent to form a colloid, and finally the colloid is bonded to a fabric substrate to produce the highly breathable, adhesive, low-sensitivity adhesive patch. When the siloxane structure in the modified polyacrylate resin is mixed with ethanol and water, it hydrolyzes to produce silanols, which can react with the silanols on the surface of the molecular sieve to form a strong silicon-oxygen-silicon chemical bond, allowing the molecular sieve to better bond with the modified polyacrylate resin. The large number of pores in the molecular sieve makes it easier for water vapor molecules to pass through, thereby greatly improving the breathability of the medical adhesive patch. Furthermore, the modified polyacrylate resin contains numerous carbon-fluorine bonds, where the fluorine atoms have strong electronegativity, with the electron cloud tending toward the fluorine atoms. This allows the fluorine-containing groups in the modified polyacrylate resin to form an electron shielding layer, preventing the interaction between water molecules and the polymer surface, achieving a significant water-blocking effect, thereby indirectly improving the breathability of the medical adhesive patch. The combination of these two properties gives the patch excellent breathability and water-blocking properties. Furthermore, the patch is made entirely of hypoallergenic ingredients, resulting in a low-sensitivity product, promising broad application prospects and a broad market. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a highly breathable adhesive low-sensitivity adhesive tape.

[0022] Figure 2 This is a schematic diagram of the chemical reaction for preparing modified polyacrylate resin.

[0023] Figure 3 This is a schematic diagram of the process for preparing a highly breathable adhesive low-sensitivity adhesive patch.

[0024] Figure 4 is the chemical structural formula of the modified polyacrylate resin prepared in Example 1.

[0025] Reference numerals: 1. release paper; 2. adhesive; 3. fabric substrate. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions, and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the following examples. However, this should not be construed as limiting the scope of this application to the following examples. Without departing from the above-mentioned method concepts of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0027] In this application, the terms used in this application are for the purpose of describing specific embodiments only and are not intended to be limiting of the application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0029] In addition, as used in this application, the singular forms "for," "or," "a," "any," "one," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0030] In the first aspect, the present application provides a highly breathable, low-sensitivity adhesive tape, comprising a fabric substrate 3, a glue 2 bonded to the fabric substrate 3, and a release paper 1 bonded to the glue 2 on the side facing away from the fabric substrate 3. Figure 1 As shown. The fabric substrate 3 includes any one of cotton, non-woven, and Johnson & Johnson fabrics; the anti-adhesive paper 1 includes any one of release paper, glassine paper, and silicone paper; the colloid 2 is prepared by blending modified polyacrylate resin, ethanol, water, molecular sieve, crosslinking agent, and tackifier; the modified polyacrylate resin is copolymerized by methacrylate-based siloxane and fluorine-containing acrylate;

[0031] The structure of the methacrylate siloxane comprises:

[0032] ;

[0033] Wherein R'' represents a substituent on the oxygen to which it is attached, including the following structures:

[0034] .

[0035] In a possible implementation, the mass ratio of the polyacrylate resin, ethanol, water, molecular sieve, crosslinking agent and tackifying resin is (50-60): (10-20): (10-20): (5-15): (1-3): (5-10).

[0036] In a possible implementation, the molecular sieve has a particle size range of 0.1 to 1.5 μm, including one or more of type A molecular sieve, type X molecular sieve, and type Y molecular sieve.

[0037] In a possible implementation, the cross-linking agent includes any one of dicumyl peroxide, benzoyl peroxide, and dicumyl hydroperoxide.

[0038] In a possible implementation, the tackifier includes any one of maleic rosin, rosin glycerol ester, and terpene resin.

[0039] In one possible implementation, the structure of the fluorinated acrylate includes:

[0040] ;

[0041] Wherein R represents a substituent on the carbon to which it is attached, including any one of hydrogen and methyl; R' represents a substituent on the oxygen to which it is attached, including any one of the following structures:

[0042] 、 、 .

[0043] In one possible implementation, the process of copolymerizing the methacrylate-based siloxane with the fluorinated acrylate to obtain the modified polyacrylate resin includes:

[0044] ;

[0045] Wherein, the structure of the modified polyacrylate resin is as follows Figure 2 As shown, including:

[0046] ;

[0047] R represents a substituent on the carbon to which it is attached, including any one of hydrogen and methyl; R' represents a substituent on the oxygen to which it is attached, including any one of the following structures:

[0048] 、 、 ;

[0049] R'' represents a substituent on the oxygen to which it is attached, including the following structures:

[0050] ;

[0051] n is an integer in the range of 40 to 80; m is an integer in the range of 60 to 100.

[0052] In the second aspect, the present application provides a method for preparing a highly breathable adhesive low-sensitivity adhesive patch, such as Figure 3 As shown, including:

[0053] Add modified polyacrylate resin, ethanol, water, molecular sieve, crosslinking agent and tackifier into reactor 1, stir and blend at 50-60° C. under nitrogen protection for 2-4 hours, and cool and discharge to obtain the colloid 2;

[0054] Finally, the glue 2 is coated and bonded to the substrate by a glue coating machine, and then dried at 80-90° C., and then the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3, thereby obtaining the highly breathable adhesive low-sensitivity adhesive tape.

[0055] The method for preparing the above-mentioned highly breathable adhesive low-sensitivity adhesive patch further comprises preparing a modified polyacrylate resin:

[0056] First, add methacrylate siloxane, fluorinated acrylate and solvent A into reactor II, stir under nitrogen protection, and heat to 150-160°C;

[0057] Then, initiator and chain transfer agent were added to reactor II, and reflux reaction was carried out at 150-160°C under nitrogen protection for 2-3 hours;

[0058] Then the temperature is lowered to 50-70°C and the material is discharged to obtain modified polyacrylate resin.

[0059] In a possible implementation, the solvent A includes one or more of ethyl acetate and dichloromethane.

[0060] In a possible implementation, the initiator includes one or more of azobisisobutyronitrile and azobisisoheptanenitrile.

[0061] In a possible implementation, the chain transfer agent includes one or more of n-dodecyl mercaptan, tert-dodecyl mercaptan, and hexadecyl mercaptan.

[0062] In a possible implementation, the mass ratio of the methacrylate-based siloxane, fluorinated acrylate, solvent A, initiator, and chain transfer agent is: (20-40): (30-50): (20-30): (0.5-1.5): (1.5-3).

[0063] The following will describe in detail a highly breathable adhesive low-sensitivity adhesive patch and its preparation method provided by the present application in combination with different embodiments.

[0064] Example 1:

[0065] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0066] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent ethyl acetate into the reactor II, stir under nitrogen protection, and heat to 150°C;

[0067] 2. Subsequently, azobisisobutyronitrile and n-dodecyl mercaptan were added to the reactor II, and then refluxed at 150° C. under nitrogen protection for 2 h;

[0068] 3. Then cool to 50°C and discharge to obtain modified polyacrylate resin;

[0069] In steps 1 to 3, 、 , ethyl acetate, azobisisobutyronitrile and n-dodecyl mercaptan in a mass ratio of 30:40:28:0.5:1.5;

[0070] The structure of the modified polyacrylate resin is as follows: Figure 4 shown.

[0071] 4. Add modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and maleic rosin into reactor I, stir and blend at 50° C. under nitrogen protection for 2 hours, and cool and discharge to obtain the colloid 2;

[0072] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 80°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0073] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and maleic rosin is 60:10:10:10:2:8.

[0074] Example 2:

[0075] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0076] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent dichloromethane into the reactor II, stir under nitrogen protection, and heat to 160°C;

[0077] 2. Subsequently, azobisisoheptanenitrile and tert-dodecyl mercaptan were added to the reaction vessel II, and then refluxed at 160° C. under nitrogen protection for 3 h;

[0078] 3. Then cool to 70°C and discharge to obtain modified polyacrylate resin;

[0079] In steps 1 to 3, 、 The mass ratio of dichloromethane, azobisisoheptanenitrile and tert-dodecylmercaptan is: 25:45:27:1:2;

[0080] 4. Add modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester into reactor I, stir and blend at 60° C. under nitrogen protection for 4 hours, and cool and discharge to obtain the colloid 2;

[0081] 5. Finally, the glue 2 is coated and adhered to the substrate by a glue coating machine, and then dried at 90°C. Then, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3, thereby obtaining the highly breathable adhesive low-sensitivity adhesive tape;

[0082] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester is 50:15:10:15:3:7.

[0083] Example 3:

[0084] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0085] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent ethyl acetate into the reactor II, stir under nitrogen protection, and heat to 155°C;

[0086] 2. Subsequently, azobisisobutyronitrile and hexadecyl mercaptan were added to the reactor II, and then refluxed at 155°C under nitrogen protection for 2.5 hours;

[0087] 3. Then cool to 65°C and discharge to obtain modified polyacrylate resin;

[0088] In steps 1 to 3, 、 , ethyl acetate, azobisisobutyronitrile and hexadecyl mercaptan in a mass ratio of 40:36:20:1:3;

[0089] 4. Add modified polyacrylate resin, ethanol, water, Y-type molecular sieve, diisopropylbenzene hydroperoxide and terpene resin into reactor I, stir and blend at 55° C. under nitrogen protection for 3 hours, and cool and discharge to obtain the colloid 2;

[0090] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 85°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0091] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, Y-type molecular sieve, diisopropylbenzene hydroperoxide and terpene resin is 55:15:15:8:2:5.

[0092] Example 4:

[0093] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0094] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent dichloromethane into the reactor II, stir under nitrogen protection, and heat to 160°C;

[0095] 2. Subsequently, azobisisoheptanenitrile and n-dodecyl mercaptan were added to the reaction vessel II, and then refluxed at 160° C. under nitrogen protection for 3 h;

[0096] 3. Then cool to 60°C and discharge to obtain modified polyacrylate resin;

[0097] In steps 1 to 3, 、 The mass ratio of dichloromethane, azobisisoheptanenitrile and n-dodecylmercaptan is: 25:50:23:1:1;

[0098] 4. Add modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester into reactor I, stir and blend at 60° C. under nitrogen protection for 3.5 hours, and cool and discharge to obtain the colloid 2;

[0099] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 80°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0100] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester is 50:10:14:15:1:10.

[0101] Example 5:

[0102] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0103] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent ethyl acetate into the reactor II, stir under nitrogen protection, and heat to 150°C;

[0104] 2. Then, azobisisobutyronitrile and hexadecyl mercaptan were added to the reactor II, and then refluxed at 150° C. under nitrogen protection for 3 hours;

[0105] 3. Then cool to 55°C and discharge to obtain modified polyacrylate resin;

[0106] In steps 1 to 3, 、 , ethyl acetate, azobisisobutyronitrile and hexadecyl mercaptan in a mass ratio of 40:35:22:1.5:1.5;

[0107] 4. Add modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and terpene resin into reactor I, stir and blend at 55° C. under nitrogen protection for 4 hours, and cool and discharge to obtain the colloid 2;

[0108] 5. Finally, the glue 2 is coated and adhered to the substrate by a glue coating machine, and then dried at 90°C. Then, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3, thereby obtaining the highly breathable adhesive low-sensitivity adhesive tape;

[0109] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and terpene resin is 55:10:15:12:3:5.

[0110] Example 6:

[0111] like Figure 3 As shown, a method for preparing a highly breathable adhesive low-sensitivity adhesive patch comprises the following steps:

[0112] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent dichloromethane into the reactor II, stir under nitrogen protection, and heat to 155°C;

[0113] 2. Subsequently, azobisisoheptanenitrile and tert-dodecyl mercaptan were added to the reaction vessel II, and then refluxed at 155° C. under nitrogen protection for 2.5 hours;

[0114] 3. Then cool to 60°C and discharge to obtain modified polyacrylate resin;

[0115] In steps 1 to 3, 、 The mass ratio of dichloromethane, azobisisoheptanenitrile and tert-dodecylmercaptan is 30:45:21:1:3;

[0116] 4. Add modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester into reactor I, stir and blend at 50° C. under nitrogen protection for 2 hours, and cool and discharge to obtain the colloid 2;

[0117] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 80°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0118] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester is 56:12:12:12:2:6.

[0119] Comparative Example 1:

[0120] A method for preparing a highly breathable, viscous, low-sensitivity adhesive patch comprises the following steps:

[0121] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent ethyl acetate into the reactor II, stir under nitrogen protection, and heat to 150°C;

[0122] 2. Subsequently, azobisisobutyronitrile and n-dodecyl mercaptan were added to the reactor II, and then refluxed at 150° C. under nitrogen protection for 2 h;

[0123] 3. Then cool to 50°C and discharge to obtain modified polyacrylate resin;

[0124] In steps 1 to 3, 、 , ethyl acetate, azobisisobutyronitrile and n-dodecyl mercaptan in a mass ratio of 30:40:28:0.5:1.5;

[0125] The structure of the modified polyacrylate resin is as follows: Figure 4 shown.

[0126] 4. Add modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and maleic rosin into reactor I, stir and blend at 50° C. under nitrogen protection for 2 hours, and cool and discharge to obtain the colloid 2;

[0127] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 80°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0128] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, type A molecular sieve, dicumyl peroxide and maleic rosin is 60:10:10:10:2:8.

[0129] Comparative Example 2:

[0130] A method for preparing a highly breathable, viscous, low-sensitivity adhesive patch comprises the following steps:

[0131] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent ethyl acetate into the reactor II, stir under nitrogen protection, and heat to 155°C;

[0132] 2. Subsequently, azobisisobutyronitrile and hexadecyl mercaptan were added to the reactor II, and then refluxed at 155°C under nitrogen protection for 2.5 hours;

[0133] 3. Then cool to 65°C and discharge to obtain modified polyacrylate resin;

[0134] In steps 1 to 3, 、 , ethyl acetate, azobisisobutyronitrile and hexadecyl mercaptan in a mass ratio of 40:36:20:1:3;

[0135] 4. Add modified polyacrylate resin, ethanol, water, spherical silica, diisopropylbenzene hydroperoxide and terpene resin into reactor I, stir and blend at 55° C. under nitrogen protection for 3 hours, and cool and discharge to obtain the colloid 2;

[0136] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 85°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0137] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, spherical silica, diisopropylbenzene hydroperoxide and terpene resin is 55:15.

[0138] Comparative Example 3:

[0139] A method for preparing a highly breathable, viscous, low-sensitivity adhesive patch comprises the following steps:

[0140] 1. Change the structure to Methacrylate siloxane, structure Add the fluorinated acrylate and solvent dichloromethane into the reactor II, stir under nitrogen protection, and heat to 155°C;

[0141] 2. Subsequently, azobisisoheptanenitrile and tert-dodecyl mercaptan were added to the reaction vessel II, and then refluxed at 155° C. under nitrogen protection for 2.5 hours;

[0142] 3. Then cool to 60°C and discharge to obtain modified polyacrylate resin;

[0143] In steps 1 to 3, 、 The mass ratio of dichloromethane, azobisisoheptanenitrile and tert-dodecylmercaptan is 30:45:21:1:3;

[0144] 4. Add modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester into reactor I, stir and blend at 50° C. under nitrogen protection for 2 hours, and cool and discharge to obtain the colloid 2;

[0145] 5. Finally, the glue 2 is coated on the substrate by a glue coating machine and adhered to the substrate. After drying at 80°C, the release paper 1 is attached to the side of the glue 2 facing away from the fabric substrate 3 to obtain the highly breathable adhesive low-sensitivity adhesive tape.

[0146] In steps 4 and 5, the mass ratio of modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester is 56:12:12:12:2:6.

[0147] With reference to YY / T 0148-2006, the water vapor permeability test method was adopted to test the water vapor permeability of the prepared high-breathable adhesive low-sensitivity adhesive tape every 24 hours to reflect its breathability.

[0148] With reference to YY / T 0471.3-2004, the water permeability of the prepared high-breathable adhesive low-sensitivity adhesive tape was tested after withstanding a 500mm hydrostatic pressure for 300s to reflect its water barrier properties.

[0149] Table 1 Performance test results of high-permeability adhesive low-sensitivity adhesive patches prepared in Examples and Comparative Examples

[0150]

[0151] As shown in Table 1, the water vapor permeation rates of Examples 1-6 per 24 hours are much higher than those of Comparative Examples 1-3. Furthermore, after being subjected to a hydrostatic pressure of 500 mm for 300 seconds, no water seepage occurred in Examples 1-6, while water seepage occurred in Comparative Examples 1-3.

[0152] This is because the siloxane structure in the modified polyacrylate resin used in Examples 1-6 hydrolyzes to produce silanols when mixed with ethanol and water. These react with the silanol groups on the surface of the molecular sieve, forming strong silicon-oxygen-silicon chemical bonds. This allows the molecular sieve to better bond with the modified polyacrylate resin. Furthermore, the numerous pores in the molecular sieve allow water vapor molecules to pass more easily, significantly improving the breathability of the medical adhesive patch.

[0153] At the same time, the modified polyacrylate resin contains a large number of carbon-fluorine bond structures, in which the fluorine atom has a strong electronegativity, and the electron cloud is more biased toward the side of the fluorine atom, so that the fluorine-containing group forms an electron shielding layer in the modified polyacrylate resin, preventing the interaction between water molecules and the polymer surface, and achieving a significant water-blocking effect.

[0154] The combination of the two makes the adhesive tape have excellent air permeability and water resistance. At the same time, the adhesive tape is made of hypoallergenic substances, which also makes it hypoallergenic and has broad application prospects and markets.

[0155] Comparative Example 2 does not use a molecular sieve with a porous structure; Comparative Example 3 does not contain a siloxane structure, and even if a molecular sieve is used, it cannot be well combined with the resin; at the same time, Comparative Examples 1 to 3 do not contain a carbon-fluorine bond structure, which cannot prevent the interaction between water molecules and the polymer surface. Therefore, the water resistance and air permeability of Comparative Examples 1 to 3 are ultimately inferior to those of Examples 1 to 6.

[0156] The above results show and describe the basic principles and main features of this application as well as the advantages of this application.

[0157] Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. Such changes and improvements are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the equivalents of the appended claims.

Claims

1. A highly breathable, viscous, low-sensitivity adhesive tape comprising a fabric substrate (3), a colloid (2) bonded to the fabric substrate (3), and a release paper (1) bonded to the colloid (2) on a side facing away from the fabric substrate (3); the colloid (2) is prepared by blending modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide, and rosin glycerol ester; The modified polyacrylate resin is formed by copolymerization of methacrylate-based siloxane and fluorine-containing acrylate; The structure of the methacrylate siloxane comprises: ； Wherein R'' represents a substituent on the oxygen to which it is attached, including the following structures: ； The preparation method of the highly breathable adhesive low-sensitivity adhesive patch comprises the following steps: S1, the structure is Methacrylate siloxane, structure Add the fluorinated acrylate and solvent dichloromethane into the reactor II, stir under nitrogen protection, and heat to 160°C; S2. Subsequently, azobisisoheptanenitrile and n-dodecyl mercaptan were added to the reactor II, and then refluxed at 160° C. under nitrogen protection for 3 h; S3, then cooling to 60°C and discharging to obtain modified polyacrylate resin; In steps S1 to S3, 、 The mass ratio of dichloromethane, azobisisoheptanenitrile and n-dodecylmercaptan is: 25:50:23:1:1; S4, adding modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester into the reactor I, stirring and blending at 60°C under nitrogen protection for 3.5 hours, and cooling and discharging to obtain the colloid (2); S5. Finally, the glue (2) is coated and bonded to the fabric substrate (3) by a glue coating machine, and then dried at 80°C and affixed with a release paper (1) on the side of the glue (2) facing away from the fabric substrate (3), thereby obtaining the highly breathable adhesive low-sensitivity adhesive tape; In steps S4 to S5, the mass ratio of modified polyacrylate resin, ethanol, water, X-type molecular sieve, benzoyl peroxide and rosin glycerol ester is 50:10:14:15:1:

10.

2. The highly breathable, viscous, low-sensitivity adhesive patch according to claim 1, characterized in that: The particle size of the X-type molecular sieve is in the range of 0.1 to 1.5 μm.

3. The highly breathable, viscous, low-sensitivity adhesive patch according to claim 1, characterized in that: The process of copolymerizing the methacrylate-based siloxane and the fluorinated acrylate to obtain the modified polyacrylate resin comprises: ； Wherein, the structure of the modified polyacrylate resin includes: ； R' represents a substituent on the oxygen to which it is attached, including the following structures: ； R'' represents a substituent on the oxygen to which it is attached, including the following structures: ； n is an integer in the range of 40 to 80; m is an integer in the range of 60 to 100.

Images