A water-based glue for producing RFID tag antennas and a preparation method and use method thereof

Abstract

The present invention discloses a water-based glue for producing RFID tag antennas, a preparation method thereof and a use method thereof, which belongs to the field of adhesives for RFID tag antennas. The water-based glue comprises the following raw materials by weight: 10-15 parts of polyurethane modified polyacrylate emulsion, 5-10 parts of silicone / polyether modified polyacrylate emulsion, 0.8-1.6 parts of isocyanate curing agent, and 0.08-0.18 parts of catalyst; and the use method thereof is as follows: after the water-based glue for producing RFID tag antennas is mixed evenly with water at a mass ratio of 1:0.5, it is evenly coated on the surface of a PET film substrate, and a matching aluminum foil is attached to the surface of the substrate coated with the water-based glue, and cured at room temperature of 25°C for 24 hours. The present invention utilizes polyurethane, silicone, and polyether flexible molecular chains to modify polyacrylate, thereby improving the flexibility of the cured adhesive layer. At the same time, since the polyurethane, silicone, polyether molecules are cross-linked with the polyacrylate, a stable three-dimensional network structure is formed, thereby improving the bonding strength and mechanical strength.

Description

Technical Field

[0001] The invention belongs to the field of adhesives for RFID tag antennas, and in particular relates to a water-based glue used for producing RFID tag antennas, and a preparation method and a use method thereof. Background Art

[0002] RFID tag antenna is the transponder antenna of RFID electronic tag, which is a communication induction antenna. It is usually composed of RFID electronic tag transponder and chip. At present, RFID tag antenna usually uses PET film as antenna substrate, aluminum foil is glued to PET film by glue, and then the antenna is made by printing, etching and other processes. However, the glue used in the existing RFID tag antenna production process is boiling glue, which needs to add diluent. After curing, the flexibility of the glue layer is poor, and the bonding strength needs to be improved. In addition, waste glue is a hazardous chemical with high processing cost, which is not conducive to environmental protection, long production cycle, and needs to be cured for 5-7 days. Summary of the invention

[0003] In view of the deficiencies of the prior art, the object of the present invention is to provide a water-based glue for the production of RFID tag antennas and a preparation method and a use method thereof.

[0004] The technical solution of the present invention is summarized as follows:

[0005] A water-based glue for producing RFID tag antennas comprises the following raw materials in parts by weight: 10-15 parts of polyurethane-modified polyacrylate emulsion, 5-10 parts of silicone / polyether-modified polyacrylate emulsion, 0.8-1.6 parts of isocyanate curing agent, and 0.08-0.18 parts of catalyst.

[0006] Preferably, the preparation method of the polyurethane modified polyacrylate emulsion is: add 3-5 parts of polyurethane prepolymer to 3-5 parts of N,N-dimethylformamide by mass, mix evenly, then add 5-10 parts of methyl acrylate and 2-4 parts of 2-butenol, heat to 75-85°C, add 0.1-0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization and stir the reaction for 2-4h, then add 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water, stir and emulsify for 30min, and obtain the polyurethane modified polyacrylate emulsion.

[0007] Preferably, the preparation method of the silicone / polyether modified polyacrylate emulsion is: add 2-3 parts of amino silicone oil and 2-3 parts of terminal amino polyether to 3-5 parts of N,N-dimethylformamide by mass, mix evenly, then add 2-3 parts of acrylic acid, 1-2 parts of itaconic acid, 0.05-0.1 parts of dicyclohexylcarbodiimide, stir and react at 80-100°C for 1-2h, then add 5-10 parts of methyl acrylate, cool to 75-85°C, add 0.1-0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization and stir and react for 2-4h, then add 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water, stir and emulsify for 30min, and obtain the silicone / polyether modified polyacrylate emulsion.

[0008] Preferably, the isocyanate curing agent includes one or more of hexamethylene diisocyanate biuret, hexamethylene diisocyanate trimer or isophorone diisocyanate trimer.

[0009] Preferably, the catalyst is an aminosilane coupling agent or an epoxysilane coupling agent.

[0010] Preferably, the aminosilane coupling agent includes one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, anilinemethyltrimethoxysilane, anilinemethyltriethoxysilane, and polyaminoalkyltrialkoxysilane.

[0011] Preferably, the epoxysilane coupling agent includes one or more of γ-glycidyloxypropyltrimethoxysilane, γ-glycidyloxypropyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane or 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0012] A method for preparing the water-based glue for producing RFID tag antennas: after mixing polyurethane-modified polyacrylate emulsion and silicone / polyether-modified polyacrylate emulsion according to parts by mass, adding isocyanate curing agent and catalyst, and magnetically stirring for 20-30 minutes, the water-based glue for producing RFID tag antennas is obtained.

[0013] A method for using the water-based glue for producing RFID tag antennas: after uniformly mixing the water-based glue for producing RFID tag antennas with water at a mass ratio of 1:0.5, uniformly coating the mixture on the surface of a PET film substrate, and laminating a matching aluminum foil on the surface of the substrate coated with the water-based glue, and curing the mixture at room temperature of 25°C for 24 hours.

[0014] Preferably, the lamination pressure is 0.12-0.2 MPa.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention adopts polyurethane modified polyacrylate emulsion, silicone / polyether modified polyacrylate emulsion, isocyanate curing agent, amino or epoxy silane coupling agent catalyst to compound water-based glue for RFID tag antenna production for the first time, and uses the flexible molecular chains of polyurethane, silicone and polyether to modify polyacrylate, thereby improving the flexibility of the glue layer after curing. At the same time, since the polyurethane, silicone and polyether molecules are cross-linked with the polyacrylate, a stable three-dimensional network structure is formed, thereby improving the bonding strength and mechanical strength.

[0017] 2. The water-based glue used for the production of RFID tag antennas of the present invention avoids the safety risks of the solvent in the solvent-based glue and the cost of collecting and processing after volatilization. It is green and environmentally friendly, and the curing time is greatly reduced. Curing can be completed in 24 hours, which can better improve production efficiency and production capacity, and the production cycle is short.

[0018] 3. The present invention uses water as a diluent for the aqueous glue used in the production of RFID tag antennas, and adds a proper amount of water to solidify the glue to achieve a suitable production viscosity, thereby improving the stability of the antenna performance. In particular, it does not require the addition of chemical diluents, and can greatly reduce the cost of processing waste glue after use, thereby greatly reducing production costs; the curing time after production is completed is short, which can better improve production efficiency and capacity.

[0019] 4. The water-based glue used for the production of RFID tag antennas of the present invention uses water as a diluent, and a proper amount of water is added to solidify the glue to achieve a suitable production viscosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of a method for preparing water-based glue for producing RFID tag antennas according to the present invention;

[0021] Figure 2 The flowchart of the preparation method of the polyurethane modified polyacrylate emulsion of the present invention;

[0022] Figure 3 The present invention is a flow chart of the preparation method of the organosilicon / polyether modified polyacrylate emulsion. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0024] The present invention provides an embodiment of a water-based glue for producing RFID tag antennas, comprising the following raw materials in parts by weight: 10-15 parts of polyurethane-modified polyacrylate emulsion, 5-10 parts of silicone / polyether-modified polyacrylate emulsion, 0.8-1.6 parts of isocyanate curing agent, and 0.08-0.18 parts of catalyst;

[0025] The isocyanate curing agent includes one or more of hexamethylene diisocyanate biuret, hexamethylene diisocyanate trimer or isophorone diisocyanate trimer;

[0026] The catalyst is one of an aminosilane coupling agent or an epoxysilane coupling agent; the aminosilane coupling agent includes one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, anilinemethyltrimethoxysilane, anilinemethyltriethoxysilane, and polyaminoalkyltrialkoxysilane; the epoxysilane coupling agent includes one or more of γ-glycidyloxypropyltrimethoxysilane, γ-glycidyloxypropyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, or 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0027] The method for preparing the water-based glue for producing RFID tag antennas of this embodiment comprises the following steps:

[0028] S1: Preparation of polyurethane modified polyacrylate emulsion: Add 3-5 parts of polyurethane prepolymer to 3-5 parts of N,N-dimethylformamide by mass, mix well, then add 5-10 parts of methyl acrylate and 2-4 parts of 2-butenol, heat to 75-85°C, add 0.1-0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization and stir for 2-4 hours, then add 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water, stir and emulsify for 30 minutes to obtain the polyurethane modified polyacrylate emulsion.

[0029] S2: preparing a silicone / polyether modified polyacrylate emulsion: adding 2-3 parts of amino silicone oil and 2-3 parts of amino-terminated polyether to 3-5 parts of N,N-dimethylformamide by mass, and mixing evenly, and then adding 2-3 parts of acrylic acid, 1-2 parts of itaconic acid, and 0.05-0.1 parts of dicyclohexylcarbodiimide, stirring and reacting at 80-100° C. for 1-2 hours, and then adding 5-10 parts of methyl acrylate, cooling to 75-85° C., adding 0.1-0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization, and stirring and reacting for 2-4 hours, and then adding 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water, stirring and emulsifying for 30 minutes, to obtain the silicone / polyether modified polyacrylate emulsion;

[0030] S3: After mixing 10-15 parts of polyurethane modified polyacrylate emulsion and 5-10 parts of silicone / polyether modified polyacrylate emulsion by mass, add 0.8-1.6 parts of isocyanate curing agent and 0.08-0.18 parts of catalyst, and stir magnetically for 20-30 minutes to obtain water-based glue for RFID tag antenna production.

[0031] The method for using the water-based glue for producing RFID tag antennas of this embodiment is as follows: after uniformly mixing the water-based glue for producing RFID tag antennas with water at a mass ratio of 1:0.5, uniformly coating the mixture on the surface of a PET film substrate, and laminating a matching aluminum foil on the surface of the substrate coated with the water-based glue at a laminating pressure of 0.12-0.2 MPa, and curing the mixture at room temperature of 25°C for 24 hours.

[0032] Example 1

[0033] A method for preparing water-based glue for producing RFID tag antennas, comprising the following steps:

[0034] S1: preparing polyurethane modified polyacrylate emulsion: adding 3 parts of polyurethane prepolymer to 3 parts of N,N-dimethylformamide by mass, mixing evenly, then adding 5 parts of methyl acrylate and 2 parts of 2-butenol, heating to 75°C, adding 0.1 parts of diisopropyl peroxydicarbonate to initiate polymerization reaction and stirring for 2 hours, then adding 0.1 parts of sodium dodecylbenzene sulfonate and 15 parts of deionized water, stirring and emulsifying for 30 minutes, and obtaining the polyurethane modified polyacrylate emulsion;

[0035] S2: preparing a silicone / polyether modified polyacrylate emulsion: adding 2 parts of amino silicone oil and 2 parts of amino-terminated polyether to 3 parts of N,N-dimethylformamide by mass, mixing evenly, then adding 2 parts of acrylic acid, 1 part of itaconic acid, and 0.05 parts of dicyclohexylcarbodiimide, stirring and reacting at 80°C for 1 hour, then adding 5 parts of methyl acrylate, cooling to 75°C, adding 0.1 parts of diisopropyl peroxydicarbonate to initiate polymerization, stirring and reacting for 2 hours, then adding 0.1 parts of sodium dodecylbenzene sulfonate and 15 parts of deionized water, stirring and emulsifying for 30 minutes, and obtaining the silicone / polyether modified polyacrylate emulsion;

[0036] S3: After mixing 10 parts of polyurethane modified polyacrylate emulsion and 5 parts of silicone / polyether modified polyacrylate emulsion by mass, add 0.8 parts of hexamethylene diisocyanate biuret and 0.08 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and stir magnetically for 20 minutes to obtain water-based glue for RFID tag antenna production.

[0037] Example 2

[0038] A method for preparing water-based glue for producing RFID tag antennas, comprising the following steps:

[0039] S1: preparing polyurethane modified polyacrylate emulsion: adding 4 parts of polyurethane prepolymer to 3-5 parts of N,N-dimethylformamide by mass, mixing evenly, then adding 7.5 parts of methyl acrylate and 3 parts of 2-butenol, heating to 80°C, adding 0.15 parts of diisopropyl peroxydicarbonate to initiate polymerization reaction and stirring for 3 hours, then adding 0.2 parts of sodium dodecylbenzene sulfonate and 18 parts of deionized water, stirring and emulsifying for 30 minutes, and obtaining the polyurethane modified polyacrylate emulsion;

[0040] S2: Prepare an organosilicon / polyether modified polyacrylate emulsion: add 2.5 parts of amino silicone oil and 2.5 parts of amino-terminated polyether to 4 parts of N,N-dimethylformamide by mass, mix well, then add 2.5 parts of acrylic acid, 1.5 parts of itaconic acid, and 0.08 parts of dicyclohexylcarbodiimide, stir and react at 90°C for 1.5 hours, then add 7.5 parts of methyl acrylate, cool to 80°C, add 0.15 parts of diisopropyl peroxydicarbonate to initiate polymerization, stir and react for 3 hours, then add 0.2 parts of sodium dodecylbenzene sulfonate and 18 parts of deionized water, stir and emulsify for 30 minutes, and obtain the organosilicon / polyether modified polyacrylate emulsion;

[0041] S3: After mixing 12.5 parts of polyurethane modified polyacrylate emulsion and 7.5 parts of silicone / polyether modified polyacrylate emulsion by mass, add 1.2 parts of hexamethylene diisocyanate trimer and 0.015 parts of N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, and stir magnetically for 25 minutes to obtain water-based glue for RFID tag antenna production.

[0042] Example 3

[0043] A method for preparing water-based glue for producing RFID tag antennas, comprising the following steps:

[0044] S1: preparing polyurethane modified polyacrylate emulsion: adding 5 parts of polyurethane prepolymer to 5 parts of N,N-dimethylformamide by mass, mixing evenly, then adding 10 parts of methyl acrylate and 4 parts of 2-butenol, heating to 85°C, adding 0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization reaction and stirring the reaction for 4 hours, then adding 0.3 parts of sodium dodecylbenzene sulfonate and 20 parts of deionized water, stirring and emulsifying for 30 minutes, and obtaining the polyurethane modified polyacrylate emulsion;

[0045] S2: preparing a silicone / polyether modified polyacrylate emulsion: adding 3 parts of amino silicone oil and 3 parts of amino-terminated polyether to 5 parts of N,N-dimethylformamide by mass, mixing evenly, then adding 3 parts of acrylic acid, 2 parts of itaconic acid, and 0.1 parts of dicyclohexylcarbodiimide, stirring and reacting at 100° C. for 2 hours, then adding 10 parts of methyl acrylate, cooling to 85° C., adding 0.2 parts of diisopropyl peroxydicarbonate to initiate polymerization, stirring and reacting for 4 hours, then adding 0.3 parts of sodium dodecylbenzene sulfonate and 20 parts of deionized water, stirring and emulsifying for 30 minutes, and obtaining the silicone / polyether modified polyacrylate emulsion;

[0046] S3: After mixing 15 parts of polyurethane modified polyacrylate emulsion and 10 parts of silicone / polyether modified polyacrylate emulsion by mass, add 1.6 parts of isophorone diisocyanate trimer and 0.18 parts of γ-glycidyloxypropyltrimethoxysilane, and stir magnetically for 30 minutes to obtain water-based glue for RFID tag antenna production.

[0047] Comparative Example: 15 parts of polyacrylate emulsion were added with 0.8 parts of hexamethylene diisocyanate biuret and 0.08 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane by mass, and magnetically stirred for 20 minutes to obtain water-based glue for the production of RFID tag antennas.

[0048] The peel strength of the water-based glue prepared in Examples 1-3 and the comparative example was measured according to GB / T2790-1995, and the tensile strength and elongation at break were measured according to GB / T16777-2008. The test results are shown in the following table:

[0049] Example 1 Example 2 Example 3 Comparative Example Peel strength / N / mm 1.5 1.8 1.7 1.1 Tensile strength / MPa 8.1 8.4 8.8 6.7 Elongation at break / % 428 441 462 305

[0050] The method of using the water-based glue for producing RFID tag antennas in Examples 1-3 is as follows: after uniformly mixing the water-based glue for producing RFID tag antennas with water in a mass ratio of 1:0.5, uniformly coating the mixture on the surface of a PET film substrate, and laminating a matching aluminum foil on the surface of the substrate coated with the water-based glue at a laminating pressure of 0.15 MPa, and curing the mixture at room temperature of 25°C for 24 hours.

[0051] In Examples 1-3, polyurethane-modified polyacrylate emulsion, silicone / polyether-modified polyacrylate emulsion, isocyanate curing agent, and amino or epoxy silane coupling agent catalyst are used for the first time to compound water-based glue for the production of RFID tag antennas. The polyacrylate is modified by the flexible molecular chains of polyurethane, silicone, and polyether, thereby improving the flexibility of the glue layer after curing. At the same time, since the polyurethane, silicone, and polyether molecules are cross-linked with the polyacrylate, a stable three-dimensional network structure is formed, thereby improving the bonding strength and mechanical strength.

[0052] The water-based glue used in Example 1-3 for the production of RFID tag antennas avoids the safety risks of solvents in solvent-based glues and the cost of collection and treatment after volatilization. It is green and environmentally friendly, and the curing time is greatly reduced. Curing can be completed within 24 hours, which can better improve production efficiency and capacity, and has a short production cycle.

[0053] Example 1-3 uses water as a diluent for the water-based glue used in the production of RFID tag antennas, and adds an appropriate amount of water to solidify the glue to achieve a suitable production viscosity, thereby improving the stability of the antenna performance. In particular, it does not require the addition of chemical diluents, and after use, it can greatly reduce the cost of processing waste glue, greatly reducing production costs; the curing time after production is completed is short, which can better improve production efficiency and capacity.

[0054] The water-based glue used in the production of RFID tag antennas in Example 1-3 uses water as a diluent, and a proper amount of water is added to solidify the glue to achieve a suitable production viscosity.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A water-based glue for the production of RFID tag antennas, It is characterized in that The invention comprises the following raw materials in parts by weight: 10-15 parts of polyurethane modified polyacrylate emulsion, 5-10 parts of silicone / polyether modified polyacrylate emulsion, 0.8-1.6 parts of isocyanate curing agent, and 0.08-0.18 parts of catalyst, wherein the catalyst is one of aminosilane coupling agent or epoxysilane coupling agent; The preparation method of the polyurethane modified polyacrylate emulsion is as follows: 3-5 parts of polyurethane prepolymer are added to 3-5 parts of N,N-dimethylformamide by mass, and after mixing evenly, 5-10 parts of methyl acrylate and 2-4 parts of 2-butenol are added, and the mixture is heated to 75-85° C., 0.1-0.2 parts of diisopropyl peroxydicarbonate are added to initiate polymerization reaction, and the mixture is stirred for reaction for 2-4 hours, and then 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water are added, and the mixture is stirred and emulsified for 30 minutes to obtain the polyurethane modified polyacrylate emulsion; The preparation method of the organosilicon / polyether modified polyacrylate emulsion is as follows: 2-3 parts of amino silicone oil and 2-3 parts of amino-terminated polyether are added to 3-5 parts of N,N-dimethylformamide by mass, and after uniform mixing, 2-3 parts of acrylic acid, 1-2 parts of itaconic acid, and 0.05-0.1 parts of dicyclohexylcarbodiimide are added, and after stirring and reacting at 80-100° C. for 1-2 hours, 5-10 parts of methyl acrylate are added, and the temperature is lowered to 75-85° C., 0.1-0.2 parts of diisopropyl peroxydicarbonate are added to initiate polymerization reaction, and after stirring and reacting for 2-4 hours, 0.1-0.3 parts of sodium dodecylbenzene sulfonate and 15-20 parts of deionized water are added, and emulsification is stirred for 30 minutes to obtain the organosilicon / polyether modified polyacrylate emulsion.

2. The water-based glue for producing RFID tag antennas according to claim 1, It is characterized in that The isocyanate curing agent includes one or more of hexamethylene diisocyanate biuret, hexamethylene diisocyanate trimer or isophorone diisocyanate trimer.

3. The water-based glue for producing RFID tag antennas according to claim 1, It is characterized in that The aminosilane coupling agent includes one or more of γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane, anilinemethyltrimethoxysilane, anilinemethyltriethoxysilane, and polyaminoalkyltrialkoxysilane.

4. The water-based glue for producing RFID tag antennas according to claim 1, It is characterized in that The epoxysilane coupling agent includes one or more of γ-glycidyloxypropyltrimethoxysilane, γ-glycidyloxypropyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane or 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

5. A method for preparing the water-based glue for producing RFID tag antennas according to any one of claims 1 to 4, Features: After the polyurethane modified polyacrylate emulsion and the silicone / polyether modified polyacrylate emulsion are mixed according to parts by mass, an isocyanate curing agent and a catalyst are added, and magnetic stirring is performed for 20-30 minutes to obtain the water-based glue for the production of RFID tag antennas.

6. A method for using the water-based glue for producing RFID tag antennas according to any one of claims 1 to 4, Features: The water-based glue for producing RFID tag antennas was mixed with water at a mass ratio of 1:0.5, and then evenly coated on the surface of the PET film substrate, and a matching aluminum foil was attached to the surface of the substrate coated with the water-based glue, and cured at room temperature of 25°C for 24 hours.

7. The method of use according to claim 6, It is characterized in that The lamination pressure is 0.12-0.2 MPa.

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