UV-cured acrylic adhesive tape and preparation method thereof

Abstract

The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 18-25 parts of methyl methacrylate, 25-30 parts of n-butyl acrylate, 30-35 parts of 2-ethylhexyl acrylate, 10-15 parts of acrylic acid, 8-10 parts of a reinforcing additive, 1-2 parts of benzoin diethyl ether and 15-20 parts of propylene glycol methyl ether acetate, and uniformly mixing the raw materials, the UV-cured acrylic adhesive tape is prepared by coating an adhesive tape base material with a modified reinforcing agent, then carrying out ultraviolet irradiation treatment, rolling and storing in a dark place, and the modified reinforcing agent contains double bonds and triple bonds in the ultraviolet irradiation process and can be cross-linked with other monomers to increase cross-linking points, so that the rigidity and heat resistance of polyacrylic acid are improved; the modified reinforcer contains a polyhedral oligomeric silsesquioxane structure, a benzene ring and a cyclodextrin structure, and the cyclodextrin structure can interact with a polymer chain to increase the mobility of the polymer chain, so that the flexibility and impact resistance of the material are improved.

Description

Technical Field

[0001] The invention relates to the technical field of UV curing tape preparation, and in particular to a UV curing acrylic tape and a preparation method thereof. Background Art

[0002] In recent years, acrylic tapes have been widely used in the fields of industry, electronics, construction, etc. due to their excellent adhesive properties, weather resistance, and chemical resistance. Traditional silicone-based acrylic tapes have limited their application in certain specific application scenarios due to the problems of low flexibility, insufficient strength, and poor adaptability to high temperature environments of polyacrylic acid itself. In order to overcome the shortcomings of traditional acrylic tapes, people have tried to modify polyacrylic acid in various ways to improve its high temperature resistance and mechanical properties. Summary of the invention

[0003] The purpose of the present invention is to provide a UV curing acrylic tape and a preparation method thereof, which solves the problem that the performance of the current UV curing acrylic tape is greatly reduced under high temperature conditions.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A method for preparing a UV-curable acrylic tape comprises the following steps: The following raw materials are weighed in parts by weight: 18-25 parts of methyl methacrylate, 25-30 parts of n-butyl acrylate, 30-35 parts of isooctyl acrylate, 10-15 parts of acrylic acid, 8-10 parts of a reinforcing additive, 1-2 parts of benzoin ethyl ether and 15-20 parts of propylene glycol methyl ether acetate, the raw materials are evenly mixed, coated on a tape substrate, and then irradiated for 2-4 seconds under 365 nm ultraviolet light, and rolled up and stored away from light to prepare a UV-curing acrylic tape.

[0005] Furthermore, the strengthening additive is prepared by the following steps: Step A1: octaphenyl dihydrogen polysilsesquioxane, allyl glycidyl ether, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 20-25 hours at a speed of 60-80 r / min and a temperature of 80-85° C. to obtain intermediate 1; intermediate 1, acrylic acid and DMF are mixed uniformly, and sodium borohydride is added to the mixture at a speed of 120-150 r / min and a temperature of 110-120° C. until the pH value is 8, and the reaction is carried out for 5-7 hours to obtain a functional monomer; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide, tetramethyldisiloxane and dimethyl sulfoxide are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 3-5 hours at a speed of 150-200 r / min and a temperature of 90-95° C. to obtain hydrogen polysiloxane; hydrogen polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 20-25 hours at a speed of 60-80 r / min and a temperature of 80-85° C. to obtain a reinforcing monomer; Step A3: The functional monomer, the reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate, dibutyltin dilaurate and DMF are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out for 2-3 hours at a speed of 60-80 r / min and a temperature of 75-80° C., and modified cyclodextrin is added and the reaction is continued for 3-5 hours to obtain a reinforcing additive.

[0006] Furthermore, the molar ratio of octaphenyldihydrogenpolysilsesquioxane and allyl glycidyl ether described in step A1 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of allyl glycidyl ether, and the molar ratio of intermediate 1 and acrylic acid is 1:2.

[0007] Furthermore, the molar ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide and tetramethyldisiloxane described in step A2 is 1.8:0.6:3:2, the molar ratio of hydrogenpolysiloxane and acryl alcohol is 1:2, and the amount of chloroplatinic acid used is 1.5‰ of the mass of acryl alcohol.

[0008] Furthermore, the dosage ratio of the functional monomer, reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate and modified cyclodextrin described in step A3 is 2.5mmol:5.3mmol:6mmol:13mmol:1g, the dosage of dibutyltin dioctanoate is 1% of the mass of isophorone diisocyanate, and the molecular weight of polytetrahydrofuran is 1000.

[0009] Further, the modified cyclodextrin is prepared by the following steps: Step B1: evenly mix p-bromophenol, epichlorohydrin, boron trifluoride etherate and DMF, react for 2-4 hours at a speed of 150-200 r / min and a temperature of 60-70° C., add sodium hydroxide solution, heat to 80-85° C., react for 4-6 hours to obtain a modifier, evenly mix mono-6-amino-6-deoxy-β-cyclodextrin, the modifier and DMF, react for 3-5 hours at a speed of 120-150 r / min and a pH of 10-11 to obtain a functionalized cyclodextrin; Step B2: functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide and DMF are mixed evenly, nitrogen is introduced for protection, and triethylamine is added under the conditions of a rotation speed of 150-200 r / min and a temperature of 80-85° C., and the reaction is carried out for 45-50 hours to obtain pretreated cyclodextrin. Pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out for 8-10 hours under the conditions of a rotation speed of 120-150 r / min and a temperature of 80-85° C. to obtain modified cyclodextrin.

[0010] Furthermore, the dosage ratio of p-bromophenol, epichlorohydrin, boron trifluoride etherate and sodium hydroxide solution described in step B1 is 10 mmol:10 mmol:0.5 g:30 mL, the mass fraction of the sodium hydroxide solution is 10%, and the molar ratio of mono-6-amino-6-deoxy-β-cyclodextrin and the modifier is 1:1.

[0011] Furthermore, the amount ratio of the functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide, DMF and triethylamine described in step B2 is 5mmol:40mmol:10mmol:2mmol:100mL:50mL, and the amount ratio of the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane is 2mmol:1mmol:10mL.

[0012] Beneficial effects of the present invention: A UV-curing acrylic tape prepared by the present invention comprises the following raw materials: methyl methacrylate, n-butyl acrylate, isooctyl acrylate, acrylic acid, a reinforcing additive, benzoin ethyl ether and propylene glycol methyl ether acetate; the raw materials are coated on a tape substrate and subjected to ultraviolet irradiation treatment to obtain a UV-curing acrylic tape; the reinforcing additive is made of octaphenyl dihydrogen polysilsesquioxane and allyl glycidyl ether as raw materials, and under the action of chloroplatinic acid, the Si-H bond on the octaphenyl dihydrogen polysilsesquioxane and the double bond on the allyl glycidyl ether are grafted to obtain an intermediate 1. The intermediate 1 is reacted with acrylic acid so that the epoxy group on the intermediate 1 reacts with the carboxyl group on the acrylic acid to obtain a functional monomer, octamethylcyclotetrasiloxane and methyltrifluoropropylcyclotrisiloxane are ring-opened, and then polymerized with tetramethyldisiloxane to obtain hydrogen polysiloxane, the hydrogen polysiloxane is reacted with allyl alcohol so that the Si-H bond on the hydrogen polysiloxane reacts with the double bond on the allyl alcohol to obtain a reinforcing monomer, the reinforcing monomer, the functional monomer, polytetrahydrofuran and isophorone diisocyanate are reacted to form a polyurethane prepolymer, and then modified cyclodextrin is added to continue the reaction to obtain a reinforcing additive.

[0013] The modified cyclodextrin is prepared by reacting p-bromophenol with epichlorohydrin so that the phenolic hydroxyl group on the p-bromophenol reacts with the epoxy group on the epichlorohydrin, and then a new epoxy group is formed under the action of a sodium hydroxide solution to obtain a modifier, the modifier is reacted with mono-6-amino-6-deoxy-β-cyclodextrin so that the epoxy group on the modifier reacts with the amino group on the mono-6-amino-6-deoxy-β-cyclodextrin to obtain a functionalized cyclodextrin, the functionalized cyclodextrin is reacted with 2-methyl-3-butyn-2-ol so that the bromine atom site on the functionalized cyclodextrin reacts with 2-methyl-3-butyn-2-ol through a Sonogashira reaction, and then a terminal alkynyl group is formed under the action of sodium hydroxide to obtain a modified cyclodextrin.

[0014] During the ultraviolet light irradiation process, the modified reinforcing agent contains double bonds and triple bonds, which can cross-link with other monomers to increase cross-linking points, thereby improving the rigidity and heat resistance of polyacrylic acid. The modified reinforcing agent contains cage-type silsesquioxane structure, benzene ring and cyclodextrin structure. The cyclodextrin structure can interact with the polymer chain to increase the mobility of the polymer chain, thereby improving the flexibility and impact resistance of the material. The cage-type silsesquioxane structure, silicone chain segment and fluorocarbon structure can further improve the heat resistance of the material. At the same time, the triple bond structure still contains double bonds after ultraviolet curing, so that the polymer chain forms a conjugated system, which further improves the heat resistance and mechanical strength of the material. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0016] A method for preparing a UV-curable acrylic tape comprises the following steps: The following raw materials were weighed in parts by weight: 18 parts of methyl methacrylate, 25 parts of n-butyl acrylate, 30 parts of isooctyl acrylate, 10 parts of acrylic acid, 8 parts of a reinforcing additive, 1 part of benzoin ethyl ether and 15 parts of propylene glycol methyl ether acetate, the raw materials were mixed evenly, coated on a tape substrate, and then irradiated for 2 seconds under 365 nm ultraviolet light, and then rolled up and stored away from light to prepare a UV-curing acrylic tape.

[0017] The strengthening additive is prepared by the following steps: Step A1: octaphenyl dihydrogen polysilsesquioxane, allyl glycidyl ether, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the mixture is reacted for 20 hours at a speed of 60 r / min and a temperature of 80° C. to obtain intermediate 1; intermediate 1, acrylic acid and DMF are mixed uniformly, and sodium borohydride is added to the mixture at a speed of 120 r / min and a temperature of 110° C. to obtain a functional monomer; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide, tetramethyldisiloxane and dimethyl sulfoxide are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 3 hours at a speed of 150 r / min and a temperature of 90° C. to obtain hydrogen polysiloxane; hydrogen polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 20 hours at a speed of 60 r / min and a temperature of 80° C. to obtain a reinforcing monomer; Step A3: The functional monomer, the reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate, dibutyltin dilaurate and DMF are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out at a speed of 60 r / min and a temperature of 75° C. for 2 h, and modified cyclodextrin is added and the reaction is continued for 3 h to obtain a reinforcing additive.

[0018] The molar ratio of octaphenyldihydrogenpolysilsesquioxane and allyl glycidyl ether described in step A1 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of allyl glycidyl ether, and the molar ratio of intermediate 1 and acrylic acid is 1:2.

[0019] The molar ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide and tetramethyldisiloxane described in step A2 is 1.8:0.6:3:2, the molar ratio of hydrogen polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 1.5‰ of the mass of allyl alcohol.

[0020] The amount ratio of the functional monomer, reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate and modified cyclodextrin described in step A3 is 2.5mmol:5.3mmol:6mmol:13mmol:1g, the amount of dibutyltin dioctanoate is 1% of the mass of isophorone diisocyanate, and the molecular weight of polytetrahydrofuran is 1000.

[0021] The modified cyclodextrin is prepared by the following steps: Step B1: evenly mix p-bromophenol, epichlorohydrin, boron trifluoride etherate and DMF, react for 2 hours at a speed of 150 r / min and a temperature of 60° C., add sodium hydroxide solution, heat to 80° C., and react for 4 hours to obtain a modifier, evenly mix mono-6-amino-6-deoxy-β-cyclodextrin, the modifier and DMF, react for 3 hours at a speed of 120 r / min and a pH value of 10 to obtain a functionalized cyclodextrin; Step B2: The functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide and DMF were mixed evenly, nitrogen was introduced for protection, and triethylamine was added under the conditions of a rotation speed of 150 r / min and a temperature of 80°C, and the reaction was carried out for 45 hours to obtain pretreated cyclodextrin. The pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane were mixed evenly, nitrogen was introduced for protection, and the reaction was carried out for 8 hours under the conditions of a rotation speed of 120 r / min and a temperature of 80°C to obtain modified cyclodextrin.

[0022] The amount ratio of p-bromophenol, epichlorohydrin, boron trifluoride etherate and sodium hydroxide solution described in step B1 is 10mmol:10mmol:0.5g:30mL, the mass fraction of the sodium hydroxide solution is 10%, and the molar ratio of mono-6-amino-6-deoxy-β-cyclodextrin and the modifier is 1:1.

[0023] The amount ratio of the functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide, DMF and triethylamine described in step B2 is 5mmol:40mmol:10mmol:2mmol:100mL:50mL, and the amount ratio of the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane is 2mmol:1mmol:10mL. Example

[0024] A method for preparing a UV-curable acrylic tape comprises the following steps: The following raw materials were weighed in parts by weight: 21 parts of methyl methacrylate, 28 parts of n-butyl acrylate, 33 parts of isooctyl acrylate, 13 parts of acrylic acid, 9 parts of a reinforcing additive, 1.5 parts of benzoin ethyl ether and 18 parts of propylene glycol methyl ether acetate; the raw materials were evenly mixed, coated on a tape substrate, and then irradiated for 3 seconds under 365 nm ultraviolet light, and then rolled up and stored away from light to prepare a UV-curing acrylic tape.

[0025] The strengthening additive is prepared by the following steps: Step A1: octaphenyl dihydrogen polysilsesquioxane, allyl glycidyl ether, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the mixture is reacted for 25 hours at a speed of 80 r / min and a temperature of 80° C. to obtain intermediate 1; intermediate 1, acrylic acid and DMF are mixed uniformly, and sodium borohydride is added to the mixture at a speed of 120 r / min and a temperature of 115° C. to obtain a functional monomer; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide, tetramethyldisiloxane and dimethyl sulfoxide are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 4 hours at a speed of 150 r / min and a temperature of 95° C. to obtain hydrogen polysiloxane; hydrogen polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 25 hours at a speed of 60 r / min and a temperature of 83° C. to obtain a reinforcing monomer; Step A3: The functional monomer, the reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate, dibutyltin dilaurate and DMF are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out for 3 hours at a speed of 60 r / min and a temperature of 78° C., and modified cyclodextrin is added and the reaction is continued for 4 hours to obtain a reinforcing additive.

[0026] The molar ratio of octaphenyldihydrogenpolysilsesquioxane and allyl glycidyl ether described in step A1 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of allyl glycidyl ether, and the molar ratio of intermediate 1 and acrylic acid is 1:2.

[0027] The molar ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide and tetramethyldisiloxane described in step A2 is 1.8:0.6:3:2, the molar ratio of hydrogen polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 1.5‰ of the mass of allyl alcohol.

[0028] The amount ratio of the functional monomer, reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate and modified cyclodextrin described in step A3 is 2.5mmol:5.3mmol:6mmol:13mmol:1g, the amount of dibutyltin dioctanoate is 1% of the mass of isophorone diisocyanate, and the molecular weight of polytetrahydrofuran is 1000.

[0029] The modified cyclodextrin is prepared by the following steps: Step B1: evenly mix p-bromophenol, epichlorohydrin, boron trifluoride etherate and DMF, react at a speed of 150 r / min and a temperature of 65° C. for 3 hours, add sodium hydroxide solution, heat to 83° C., and react for 5 hours to obtain a modifier, evenly mix mono-6-amino-6-deoxy-β-cyclodextrin, the modifier and DMF, react at a speed of 120 r / min and a pH value of 11 for 3-5 hours to obtain a functionalized cyclodextrin; Step B2: The functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide and DMF were mixed evenly, nitrogen was introduced for protection, and triethylamine was added under the conditions of a rotation speed of 200 r / min and a temperature of 80°C, and the reaction was carried out for 50 hours to obtain pretreated cyclodextrin. The pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane were mixed evenly, nitrogen was introduced for protection, and the reaction was carried out for 9 hours under the conditions of a rotation speed of 120 r / min and a temperature of 85°C to obtain modified cyclodextrin.

[0030] The amount ratio of p-bromophenol, epichlorohydrin, boron trifluoride etherate and sodium hydroxide solution described in step B1 is 10mmol:10mmol:0.5g:30mL, the mass fraction of the sodium hydroxide solution is 10%, and the molar ratio of mono-6-amino-6-deoxy-β-cyclodextrin and the modifier is 1:1.

[0031] The amount ratio of the functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide, DMF and triethylamine described in step B2 is 5mmol:40mmol:10mmol:2mmol:100mL:50mL, and the amount ratio of the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane is 2mmol:1mmol:10mL. Example

[0032] A method for preparing a UV-curable acrylic tape comprises the following steps: The following raw materials were weighed in parts by weight: 25 parts of methyl methacrylate, 30 parts of n-butyl acrylate, 35 parts of isooctyl acrylate, 15 parts of acrylic acid, 10 parts of a reinforcing additive, 2 parts of benzoin ethyl ether and 20 parts of propylene glycol methyl ether acetate; the raw materials were evenly mixed, coated on a tape substrate, and then irradiated for 4 seconds under 365 nm ultraviolet light, and then rolled up and stored away from light to prepare a UV-curing acrylic tape.

[0033] The strengthening additive is prepared by the following steps: Step A1: octaphenyl dihydrogen polysilsesquioxane, allyl glycidyl ether, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the mixture is reacted for 25 hours at a speed of 80 r / min and a temperature of 85° C. to obtain intermediate 1; intermediate 1, acrylic acid and DMF are mixed uniformly, and sodium borohydride is added to the mixture at a speed of 150 r / min and a temperature of 120° C. to obtain a functional monomer; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide, tetramethyldisiloxane and dimethyl sulfoxide are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 5 hours at a speed of 200 r / min and a temperature of 95° C. to obtain hydrogen polysiloxane; hydrogen polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed uniformly, nitrogen is introduced for protection, and the reaction is carried out for 25 hours at a speed of 80 r / min and a temperature of 85° C. to obtain a reinforcing monomer; Step A3: The functional monomer, the reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate, dibutyltin dilaurate and DMF are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out for 3 hours at a speed of 80 r / min and a temperature of 80° C., and modified cyclodextrin is added and the reaction is continued for 5 hours to obtain a reinforcing additive.

[0034] The molar ratio of octaphenyldihydrogenpolysilsesquioxane and allyl glycidyl ether described in step A1 is 1:2, the amount of chloroplatinic acid used is 1‰ of the mass of allyl glycidyl ether, and the molar ratio of intermediate 1 and acrylic acid is 1:2.

[0035] The molar ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide and tetramethyldisiloxane described in step A2 is 1.8:0.6:3:2, the molar ratio of hydrogen polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 1.5‰ of the mass of allyl alcohol.

[0036] The amount ratio of the functional monomer, reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate and modified cyclodextrin described in step A3 is 2.5mmol:5.3mmol:6mmol:13mmol:1g, the amount of dibutyltin dioctanoate is 1% of the mass of isophorone diisocyanate, and the molecular weight of polytetrahydrofuran is 1000.

[0037] The modified cyclodextrin is prepared by the following steps: Step B1: evenly mix p-bromophenol, epichlorohydrin, boron trifluoride etherate and DMF, react at a speed of 200 r / min and a temperature of 70° C. for 4 hours, add sodium hydroxide solution, heat to 85° C., react for 6 hours to obtain a modifier, evenly mix mono-6-amino-6-deoxy-β-cyclodextrin, the modifier and DMF, react at a speed of 150 r / min and a pH value of 11 for 5 hours to obtain a functionalized cyclodextrin; Step B2: Functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide and DMF are mixed evenly, nitrogen is introduced for protection, and triethylamine is added under stirring at a speed of 200 r / min and a temperature of 85° C., and the reaction is carried out for 50 hours to obtain pretreated cyclodextrin. Pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane are mixed evenly, nitrogen is introduced for protection, and the reaction is carried out at a speed of 150 r / min and a temperature of 85° C. for 10 hours to obtain modified cyclodextrin.

[0038] The amount ratio of p-bromophenol, epichlorohydrin, boron trifluoride etherate and sodium hydroxide solution described in step B1 is 10mmol:10mmol:0.5g:30mL, the mass fraction of the sodium hydroxide solution is 10%, and the molar ratio of mono-6-amino-6-deoxy-β-cyclodextrin and the modifier is 1:1.

[0039] The amount ratio of the functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide, DMF and triethylamine described in step B2 is 5mmol:40mmol:10mmol:2mmol:100mL:50mL, and the amount ratio of the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane is 2mmol:1mmol:10mL.

[0040] Comparative Example 1 Compared with Example 1, no functional monomer was added in this comparative example, and the remaining steps were the same.

[0041] Comparative Example 2 Compared with Example 1, no reinforcing monomer was added in this comparative example, and the remaining steps were the same.

[0042] Comparative Example 3 Compared with Example 1, this comparative example uses β-cyclodextrin instead of modified cyclodextrin, and the other steps are the same.

[0043] Comparative Example 4 Compared with Example 1, this comparative example uses epoxybutene instead of the modifier, and the remaining steps are the same.

[0044] The UV curing acrylic adhesives prepared in Examples 1-3 and Comparative Examples 1-4 were tested according to the standard of GB / T7124-2008. The material was PC / PC and the curing conditions were 365 nm ultraviolet light, 200 mw / cm 2 Irradiate for 30 seconds, keep at room temperature for 7 days, test the tensile shear strength, and then test the tensile shear strength at temperatures of 80℃, 120℃ and 150℃. The test results are shown in the following table.

[0045]

[0046] It can be seen from the above table that the present application has good mechanical strength and high temperature resistance.

[0047] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a UV curing acrylic tape, characterized in that: The specific steps include: The following raw materials are weighed in parts by weight: 18-25 parts of methyl methacrylate, 25-30 parts of n-butyl acrylate, 30-35 parts of isooctyl acrylate, 10-15 parts of acrylic acid, 8-10 parts of a reinforcing additive, 1-2 parts of benzoin ethyl ether and 15-20 parts of propylene glycol methyl ether acetate, the raw materials are mixed evenly, coated on a tape substrate, irradiated with ultraviolet light, rolled up and stored away from light, to prepare a UV-curing acrylic tape.

2. The method for preparing a UV curing acrylic tape according to claim 1, characterized in that: The strengthening additive is prepared by the following steps: Step A1: octaphenyl dihydrogen polysilsesquioxane, allyl glycidyl ether, chloroplatinic acid and DMF are uniformly mixed, nitrogen is introduced for protection, and the reaction is carried out to obtain intermediate 1; intermediate 1, acrylic acid and DMF are mixed and stirred, and sodium borohydride is added to a pH value of 8, and the reaction is carried out to obtain a functional monomer; Step A2: octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide, tetramethyldisiloxane and dimethyl sulfoxide are uniformly mixed, nitrogen is introduced for protection, and a reaction is carried out to obtain hydrogen polysiloxane; hydrogen polysiloxane, allyl alcohol, chloroplatinic acid and DMF are uniformly mixed, nitrogen is introduced for protection, and a reaction is carried out to obtain a reinforcing monomer; Step A3: The functional monomer, the reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate, dibutyltin dilaurate and DMF are uniformly mixed, nitrogen is introduced for protection, the reaction is carried out, the modified cyclodextrin is added, and the reaction is continued to obtain a reinforcing additive.

3. The method for preparing a UV curing acrylic tape according to claim 2, characterized in that: The molar ratio of octaphenyldihydrogenpolysilsesquioxane to allyl glycidyl ether in step A1 is 1:2, and the molar ratio of intermediate 1 to acrylic acid is 1:

2.

4. The method for preparing a UV curing acrylic tape according to claim 2, characterized in that: The molar ratio of octamethylcyclotetrasiloxane, methyltrifluoropropylcyclotrisiloxane, tetramethylammonium hydroxide and tetramethyldisiloxane described in step A2 is 1.8:0.6:3:2, and the molar ratio of hydrogenpolysiloxane and acryl alcohol is 1:

2.

5. The method for preparing a UV curing acrylic tape according to claim 2, characterized in that: The amount ratio of the functional monomer, reinforcing monomer, polytetrahydrofuran, isophorone diisocyanate and modified cyclodextrin described in step A3 is 2.5mmol:5.3mmol:6mmol:13mmol:1g.

6. The method for preparing a UV curing acrylic tape according to claim 2, characterized in that: The modified cyclodextrin is prepared by the following steps: Step B1: After para-bromophenol, epichlorohydrin, boron trifluoride etherate and DMF are mixed for reaction, sodium hydroxide solution is added, and the temperature is increased to react to obtain a modifier, and mono-6-amino-6-deoxy-β-cyclodextrin, the modifier and DMF are mixed for reaction to obtain a functionalized cyclodextrin; Step B2: functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide and DMF are mixed and stirred, and triethylamine is added to react to obtain pretreated cyclodextrin, and the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane are mixed and reacted to obtain modified cyclodextrin.

7. The method for preparing a UV curing acrylic tape according to claim 6, characterized in that: The amount ratio of p-bromophenol, epichlorohydrin, boron trifluoride etherate and sodium hydroxide solution described in step B1 is 10mmol:10mmol:0.5g:30mL, and the molar ratio of mono-6-amino-6-deoxy-β-cyclodextrin and the modifier is 1:

1.

8. The method for preparing a UV curing acrylic tape according to claim 6, characterized in that: The amount ratio of the functionalized cyclodextrin, 2-methyl-3-butyn-2-ol, bistriphenylphosphine palladium dichloride, cuprous iodide, DMF and triethylamine described in step B2 is 5mmol:40mmol:10mmol:2mmol:100mL:50mL, and the amount ratio of the pretreated cyclodextrin, sodium hydroxide and 1,4-dioxane is 2mmol:1mmol:10mL.

9. A UV curing acrylic tape, characterized in that: Prepared according to any one of the preparation methods described in claims 1-8.

Images