Firework lead wire paper glue product safe and easy to tear and preparation method of firework lead wire paper glue product

Abstract

The invention discloses a safe and easy-to-tear firework lead paper adhesive product and a preparation method thereof, and belongs to the technical field of paper adhesive product preparation. The safe and easy-to-tear firework lead paper adhesive product is composed of cotton paper, backing paper and modified hot melt adhesive coated on the surface of the cotton paper, and the modified hot melt adhesive is composed of 80-96 parts of composite resin, 15-24 parts of curing agent, 4-9 parts of plasticizer, 10-15 parts of filler, 30-50 parts of solvent, 2-6 parts of hydrophobic modifier and 1-6 parts of assistant. The product prepared by the method has excellent bonding performance, safety performance and hydrophobic performance.

Description

Technical Field

[0001] This invention belongs to the field of paper adhesive product preparation technology, specifically relating to a safe and easy-to-tear firework fuse paper adhesive product and its preparation method. Background Technology

[0002] In the fireworks industry, there is a type of fuse adhesive used to control the burning speed and effect of the fuse. Traditional products use high-grammage, layered kraft paper as the base material, with adhesive applied to the rough surface. In practical applications, this traditional product has revealed numerous problems, severely impacting production efficiency, fireworks combustion effects, and overall quality.

[0003] Firstly, in the production operation environment, because traditional products use 80-90g / m 2 The use of layered kraft paper as the base material results in poor delamination during use. Workers need to tear the layered kraft paper in the middle and stick the adhesive side to the firework fuse. However, in practice, one side of the paper often tears when torn. Once it tears, workers have to spend extra time and effort to find the tear, pull the paper up, and tear it again. This tedious process greatly reduces production efficiency and makes it difficult to guarantee the effectiveness of the fuse adhesion.

[0004] Secondly, in terms of the fireworks' combustion effect, traditional products have serious flaws. Even when the layered kraft paper, as a high-grammage paper, is torn apart, each side still weighs 40-60 g / m². 2 Such a thick layer of adhesive paper applied to the fuse has several adverse effects on the fireworks' combustion. Firstly, the excessive thickness of the paper can easily cause intermittent ignition, disrupting the continuity of the firework's combustion. Secondly, when attaching the fuse, the thick adhesive often results in poor adhesion and lifting, or the fuse not being completely covered, leaving parts exposed. These issues directly affect the speed of the firework's combustion, making the combustion rhythm difficult to control. Furthermore, intermittent ignition can severely impact the quality and aesthetic appeal of the fireworks. Therefore, traditional firework fuse adhesive, using high-grammage layered kraft paper as the base material, has significant shortcomings in both production operations and firework effects, urgently requiring improvement and innovation to enhance production efficiency and ensure the quality and aesthetic appeal of the fireworks' combustion. Summary of the Invention

[0005] The purpose of this invention is to provide a safe and easy-to-tear firework fuse paper adhesive product and its preparation method, in order to solve the technical problems of excessive weight and poor viscosity of existing paper adhesive products.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a safe and easy-to-tear fireworks fuse paper adhesive product, which consists of cotton paper, a backing paper (film type), and a modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive consists of 80-96 parts of composite resin, 15-24 parts of curing agent, 4-9 parts of plasticizer, 10-15 parts of filler, 30-50 parts of solvent, 2-6 parts of hydrophobic modifier, and 1-6 parts of additives.

[0007] The backing paper (film) is usually made of polypropylene (PP) film or polyester (PET) film; these two materials have good high temperature resistance, water and oil resistance, and are suitable for the labeling needs of flammable products such as fireworks and firecrackers.

[0008] Preferably, the method for preparing the composite resin includes the following steps: Q1: Under nitrogen protection, butyric acid and bisphenol A type epoxy resin E51 were added to the reaction vessel, then tetraethylammonium bromide was added, the reaction was carried out, and then the temperature was lowered. Tetraethylammonium bromide and acrylic acid containing p-hydroxyanisole were added. After the addition, the temperature was maintained and the reaction was carried out. After the reaction was completed, the temperature was lowered to obtain product 1. Q2: Add carboxymethyl chitosan and KH-550 to a container containing anhydrous ethanol, seal, ultrasonically disperse, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add nano boron nitride to a container containing sodium hydroxide solution, stir in a water bath, then stir, filter, wash, and dry to obtain hydroxylated boron nitride; add modified carboxymethyl chitosan and deionized water to a container, stir, add hydroxylated boron nitride, and continue stirring to react to obtain product 2; Q3: Add product 2 to product 1, heat and stir in a water bath to obtain product 3. Add phosphorus oxychloride and acetone to a container, add a mixture of acetone and product 3 under nitrogen atmosphere, stir and react, filter, and distill under reduced pressure to obtain product 4. Add deionized water, triethylamine and acetone to a container, then add a mixture of product 4 and acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain composite resin.

[0009] In the above process, the carboxyl group in butyric acid reacts with the epoxy group in bisphenol A type epoxy resin E51 to obtain product 1. After KH-550 modifies carboxymethyl chitosan, modified carboxymethyl chitosan is obtained. Then, it is compounded with hydroxylated boron nitride to obtain product 2. Then, the amino group in product 2 reacts with the epoxy group in product 1 to obtain product 3. The hydroxyl group in product 3 undergoes a substitution reaction with the chlorine atom in phosphorus oxychloride to obtain product 4. Then, product 4 is hydrolyzed to obtain composite resin.

[0010] Preferably, in Q1, the ratio of butyric acid to bisphenol A type epoxy resin E51 is (0.8-1.2) g: (9-12) g, the reaction temperature is 98-102℃, the reaction time is 1-1.5 h, the temperature is lowered to 90-93℃, heated to 100-102℃ and kept at that temperature for 2-3 h, and then reacted at 110-113℃ for 2-4 h.

[0011] Preferably, in Q2, the ratio of carboxymethyl chitosan, KH-550 and anhydrous ethanol is (1-3) g: (1.2-2.2) g: (10-14) mL, and the ultrasonic dispersion time is 60-80 min; the ratio of nano boron nitride and sodium hydroxide solution is (1-2) g: (8-12) mL, the concentration of sodium hydroxide solution is 5 mol / L, and the ratio of modified carboxymethyl chitosan, deionized water and hydroxylated boron nitride is (1-1.5) g: (10-12) mL: (1.2-1.5) g. After stirring for 1-2 h, hydroxylated boron nitride is added, and the reaction is continued for 20-24 h.

[0012] Preferably, in Q3, the ratio of product 2 to product 1 is (3-5) g: (80-88) g, the water bath heating temperature is 70-73℃, and the time is 2-3 h; the ratio of phosphorus oxychloride to product 3 is (1-2) g: (0.9-1.3) g, and the ratio of deionized water, triethylamine, to product 4 is (10-14) mL: (1-2) g: (2-2.5) g.

[0013] Preferably, the method for preparing the hydrophobic modifier includes the following steps: S1: Dodecanediol was added to a container containing N,N-dimethylformamide and stirred at room temperature. Then, 1,1'-carbonyldiimidazole was added under an argon atmosphere and the mixture was stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: Dodecanediol, intermediate a and cesium fluoride are added sequentially to a container, stirred and reacted. After the reaction is complete, the mixture is cooled, dissolved, precipitated, centrifuged, and vacuum dried to obtain the hydrophobic modifier.

[0014] The synthesis reaction formula for the hydrophobic modifier in the above process is as follows: The mass spectrometry analysis results of intermediate a were as follows: m / z: 390.23 (100.0%), 391.23 (22.1%), 392.23 (3.4%), 391.22 (1.5%).

[0015] Preferably, in S1, the ratio of dodecanediol, N,N-dimethylformamide, and 1,1'-carbonyldiimidazole is (1.012-1.236) g : (20-25) mL : (2.026-2.188) g; in S2, the ratio of dodecanediol, intermediate a, and cesium fluoride is (0.102-0.115) g : (0.195-0.211) g : (0.0038-0.0042) g, the stirring reaction temperature is 105-115℃, and the time is 3-4 h.

[0016] Preferably, the curing agent is composed of one or more of toluene diisocyanate, diethylenetriamine, m-phenylenediamine, phthalic anhydride, and tetrahydrophthalic anhydride; the plasticizer is composed of one or more of dioctyl phthalate, dioctyl terephthalate, dioctyl adipate, tricresyl phosphate, and tributyl citrate; the filler is composed of one or more of calcium carbonate, talc, silica, magnesium hydroxide, and wollastonite; the solvent is composed of one or more of ethyl acetate, acetone, butanone, ethanol, n-hexane, and isopropanol; and the additives are composed of one or more of KH-550, KH-560, and KH-570.

[0017] Preferably, the preparation method of the safe and easy-to-tear fireworks fuse adhesive product includes the following steps: Step 1: Slowly add the composite resin to the solvent and stir to mix. Then add the plasticizer and additives in sequence and stir until dispersed to obtain the mixture. Step 2: After drying and cooling the filler, add it to the mixture, stir and mix, then add the hydrophobic modifier, stir, add the curing agent, stir, mature, filter, let stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the process of preparing the modified hot melt adhesive, this invention adds composite resin and hydrophobic modifier. Applying this modified hot melt adhesive to fireworks fuse paper adhesive products effectively improves the product's safety, tearability, hydrophobicity, moisture resistance, viscosity, and flame retardant properties. Furthermore, in the process of preparing the safe and easy-to-tear fireworks fuse paper adhesive product, the cotton paper (14-18 g / m³)... 2 The modified hot melt adhesive is applied directly to the surface and then rolled up, which significantly reduces the weight of the product and improves the quality and aesthetic effect of the fireworks.

[0019] 2. This invention uses the prepared composite resin as a raw material for modified hot melt adhesive, and applies the modified hot melt adhesive to fireworks fuse paper adhesive products. This can effectively improve the flame retardant and adhesive properties of the products. The nitrogen-phosphorus-boron contained in the composite resin achieves ultra-high flame retardancy through a triple synergistic flame retardant mechanism. Boron nitride, which is composited with carboxymethyl chitosan, forms physical cross-linking points in the resin matrix. Based on its ultra-high hardness and layered structure, it effectively bears stress and inhibits crack propagation. The flexible long chains of modified carboxymethyl chitosan simultaneously improve the toughness of the adhesive film and prevent brittleness. At the same time, the polar groups contained form hydrogen bonds with paper cellulose, and the phosphate ester groups enhance the chelating effect. The natural polysaccharide structure endows the modified hot melt adhesive with self-thickening properties and wet adhesion. The adhesive properties of the modified hot melt adhesive are improved through the synergistic effect of multiple functional groups.

[0020] 3. The present invention applies the prepared hydrophobic modifier to fireworks fuse paper adhesive products, which can effectively improve the hydrophobic properties of the material. The long-chain alkyl groups contained therein can form a hydrophobic barrier on its surface, effectively blocking moisture and humidity, and preventing the fuse from becoming damp and failing. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: This example discloses a method for preparing a composite resin, including the following steps: Q1: Under nitrogen protection, 1g of butyric acid and 10.5g of bisphenol A type epoxy resin E51 were added to the reaction vessel, followed by 0.115g of tetraethylammonium bromide. The reaction was carried out at 100℃ for 1h, then cooled to 90℃, and 0.034g of tetraethylammonium bromide and 2g of acrylic acid containing 0.021g of p-hydroxyanisole were added. After the addition, the mixture was heated to 100℃ and kept at that temperature for 2h, then heated to 110℃ and reacted for 3h. After the reaction was completed, the mixture was cooled to obtain product 1. Q2: Add 2g of carboxymethyl chitosan and 1.7g of KH-550 to a container containing 12mL of anhydrous ethanol, seal the container, ultrasonically disperse for 60min, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add 1.5g of nano boron nitride to a container containing 10mL of 5mol / L sodium hydroxide solution, stir in a water bath, stir, filter, wash, and dry to obtain hydroxylated boron nitride; add 1.25g of modified carboxymethyl chitosan and 11mL of deionized water to the container, stir for 2h, add 1.35g of hydroxylated boron nitride, and continue stirring for 24h to obtain product 2; Q3: Add 4g of product 2 to 84g of product 1, heat and stir in a 70℃ water bath for 2 hours to obtain product 3. Add 1.5g of phosphorus oxychloride and 10mL of acetone to a container, add 7mL of acetone and 1.1g of product 3 under nitrogen atmosphere, stir and react, filter, and distill under reduced pressure to obtain product 4. Add 12mL of deionized water, 1.5g of triethylamine and 8mL of acetone to a container, then add a mixture of 2.25g of product 4 and 5mL of acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain composite resin.

[0023] This embodiment discloses a method for preparing a hydrophobic modifier, including the following steps: S1: 1.124 g of dodecanediol was added to a container containing 22.5 mL of N,N-dimethylformamide and stirred at room temperature. Then, under an argon atmosphere, 2.102 g of 1,1'-carbonyldiimidazole was added and stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: 0.108 g dodecanediol, 0.203 g intermediate a and 0.004 g cesium fluoride were added to a container in sequence and stirred at 110 °C for 3 h. After the reaction was completed, the mixture was cooled, dissolved, precipitated, centrifuged and vacuum dried to obtain the hydrophobic modifier.

[0024] This embodiment discloses a safe and easy-to-tear fireworks fuse paper adhesive product, which is composed of cotton paper, polypropylene film backing paper and modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive is composed of 88 parts of composite resin, 20 parts of phthalic anhydride, 6.5 parts of dioctyl terephthalate, 12.5 parts of silica, 40 parts of ethyl acetate, 4 parts of hydrophobic modifier and 3.5 parts of KH-560.

[0025] This embodiment discloses a method for preparing a safe and easy-to-tear fireworks fuse adhesive product, including the following steps: Step 1: Slowly add the composite resin to ethyl acetate and stir to mix. Then add dioctyl terephthalate and KH-560 in sequence and stir until dispersed to obtain a mixture. Step 2: After drying and cooling the silica, add it to the mixture, stir and mix, add the hydrophobic modifier, stir, add phthalic anhydride, stir, mature, filter, stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

[0026] Example 2: This example discloses a method for preparing a composite resin, including the following steps: Q1: Under nitrogen protection, 0.8g butyric acid and 12g bisphenol A type epoxy resin E51 were added to the reaction vessel, followed by 0.115g tetraethylammonium bromide. The reaction was carried out at 100℃ for 1h, then cooled to 90℃, and 0.034g tetraethylammonium bromide and 2g acrylic acid containing 0.021g p-hydroxyanisole were added. After addition, the mixture was heated to 100℃ and held for 2h, then heated to 110℃ and reacted for 3h. After the reaction was completed, the mixture was cooled to obtain product 1. Q2: Add 1g of carboxymethyl chitosan and 1.2g of KH-550 to a container containing 14mL of anhydrous ethanol, seal the container, ultrasonically disperse for 60min, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add 1g of nano boron nitride to a container containing 12mL of 5mol / L sodium hydroxide solution, stir in a water bath, stir, filter, wash, and dry to obtain hydroxylated boron nitride; add 1.5g of modified carboxymethyl chitosan and 10mL of deionized water to the container, stir for 2h, add 1.2g of hydroxylated boron nitride, and continue stirring for 24h to obtain product 2; Q3: Add 3g of product 2 to 80g of product 1, heat and stir in a 70℃ water bath for 2 hours to obtain product 3. Add 1g of phosphorus oxychloride and 10mL of acetone to a container, add 7mL of acetone and 1.3g of product 3 under nitrogen atmosphere, stir and react, filter, and distill under reduced pressure to obtain product 4. Add 10mL of deionized water, 1g of triethylamine and 8mL of acetone to a container, then add a mixture of 2.5g of product 4 and 5mL of acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain composite resin.

[0027] This embodiment discloses a method for preparing a hydrophobic modifier, including the following steps: S1: 1.012 g of dodecanediol was added to a container containing 25 mL of N,N-dimethylformamide and stirred at room temperature. Then, under an argon atmosphere, 2.026 g of 1,1'-carbonyldiimidazole was added and stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: 0.102g dodecanediol, 0.195g intermediate a and 0.0038g cesium fluoride were added sequentially to a container and stirred at 110°C for 3 hours. After the reaction was completed, the mixture was cooled, dissolved, precipitated, centrifuged and vacuum dried to obtain the hydrophobic modifier.

[0028] This embodiment discloses a safe and easy-to-tear fireworks fuse paper adhesive product, which is composed of cotton paper, polyester film backing paper and modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive is composed of 80 parts of composite resin, 15 parts of phthalic anhydride, 4 parts of dioctyl terephthalate, 10 parts of silica, 30 parts of ethyl acetate, 2 parts of hydrophobic modifier and 1 part of KH-560.

[0029] This embodiment discloses a method for preparing a safe and easy-to-tear fireworks fuse adhesive product, including the following steps: Step 1: Slowly add the composite resin to ethyl acetate and stir to mix. Then add dioctyl terephthalate and KH-560 in sequence and stir until dispersed to obtain a mixture. Step 2: After drying and cooling the silica, add it to the mixture, stir and mix, add the hydrophobic modifier, stir, add phthalic anhydride, stir, mature, filter, stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

[0030] Example 3: This example discloses a method for preparing a composite resin, including the following steps: Q1: Under nitrogen protection, 1.2g of butyric acid and 9g of bisphenol A type epoxy resin E51 were added to a reaction vessel, followed by 0.115g of tetraethylammonium bromide. The reaction was carried out at 100℃ for 1h, then cooled to 90℃, and 0.034g of tetraethylammonium bromide and 2g of acrylic acid containing 0.021g of p-hydroxyanisole were added. After the addition, the mixture was heated to 100℃ and held for 2h, then heated to 110℃ and reacted for 3h. After the reaction was completed, the mixture was cooled to obtain product 1. Q2: Add 3g of carboxymethyl chitosan and 2.2g of KH-550 to a container containing 10mL of anhydrous ethanol, seal the container, ultrasonically disperse for 60min, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add 2g of nano boron nitride to a container containing 8mL of 5mol / L sodium hydroxide solution, stir in a water bath, stir, filter, wash, and dry to obtain hydroxylated boron nitride; add 1g of modified carboxymethyl chitosan and 12mL of deionized water to the container, stir for 2h, add 1.5g of hydroxylated boron nitride, and continue stirring for 24h to obtain product 2; Q3: Add 5g of product 2 to 88g of product 1, heat and stir in a 70℃ water bath for 2 hours to obtain product 3. Add 2g of phosphorus oxychloride and 10mL of acetone to a container. Under nitrogen atmosphere, add a mixture of 7mL of acetone and 0.9g of product 3. After stirring and reacting, filter and distill under reduced pressure to obtain product 4. Add 14mL of deionized water, 2g of triethylamine and 8mL of acetone to a container, then add a mixture of 2g of product 4 and 5mL of acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain the composite resin.

[0031] This embodiment discloses a method for preparing a hydrophobic modifier, including the following steps: S1: 1.236 g of dodecanediol was added to a container containing 20 mL of N,N-dimethylformamide and stirred at room temperature. Then, under an argon atmosphere, 2.188 g of 1,1'-carbonyldiimidazole was added and stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: 0.115g dodecanediol, 0.211g intermediate a and 0.0042g cesium fluoride were added sequentially to a container and stirred at 110℃ for 3h. After the reaction was completed, the mixture was cooled, dissolved, precipitated, centrifuged and vacuum dried to obtain the hydrophobic modifier.

[0032] This embodiment discloses a safe and easy-to-tear fireworks fuse paper adhesive product, which is composed of cotton paper, polypropylene film backing paper and modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive is composed of 96 parts of composite resin, 24 parts of phthalic anhydride, 9 parts of dioctyl terephthalate, 15 parts of silica, 50 parts of ethyl acetate, 6 parts of hydrophobic modifier and 6 parts of KH-560.

[0033] This embodiment discloses a method for preparing a safe and easy-to-tear fireworks fuse adhesive product, including the following steps: Step 1: Slowly add the composite resin to ethyl acetate and stir to mix. Then add dioctyl terephthalate and KH-560 in sequence and stir until dispersed to obtain a mixture. Step 2: After drying and cooling the silica, add it to the mixture, stir and mix, add the hydrophobic modifier, stir, add phthalic anhydride, stir, mature, filter, stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

[0034] Example 4: This example discloses a method for preparing a composite resin, including the following steps: Q1: Under nitrogen protection, 0.9g butyric acid and 11g bisphenol A type epoxy resin E51 were added to a reaction vessel, followed by 0.115g tetraethylammonium bromide. The reaction was carried out at 100℃ for 1h, then cooled to 90℃, and 0.034g tetraethylammonium bromide and 2g acrylic acid containing 0.021g p-hydroxyanisole were added. After addition, the mixture was heated to 100℃ and held for 2h, then heated to 110℃ and reacted for 3h. After the reaction was completed, the mixture was cooled to obtain product 1. Q2: Add 1.5g of carboxymethyl chitosan and 1.4g of KH-550 to a container containing 11mL of anhydrous ethanol, seal the container, ultrasonically disperse for 60min, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add 1.2g of nano boron nitride to a container containing 9mL of 5mol / L sodium hydroxide solution, stir in a water bath, stir, filter, wash, and dry to obtain hydroxylated boron nitride; add 1.1g of modified carboxymethyl chitosan and 10.5mL of deionized water to the container, stir for 2h, add 1.3g of hydroxylated boron nitride, and continue stirring for 24h to obtain product 2; Q3: Add 4.5g of product 2 to 82g of product 1, heat and stir in a 70℃ water bath for 2 hours to obtain product 3. Add 1.1g of phosphorus oxychloride and 10mL of acetone to a container. Under nitrogen atmosphere, add a mixture of 7mL of acetone and 1g of product 3. After stirring and reacting, filter and distill under reduced pressure to obtain product 4. Add 11mL of deionized water, 1.2g of triethylamine and 8mL of acetone to a container, then add a mixture of 2.1g of product 4 and 5mL of acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain the composite resin.

[0035] This embodiment discloses a method for preparing a hydrophobic modifier, including the following steps: S1: 1.087 g of dodecanediol was added to a container containing 21 mL of N,N-dimethylformamide and stirred at room temperature. Then, under an argon atmosphere, 2.087 g of 1,1'-carbonyldiimidazole was added and stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: 0.105g dodecanediol, 0.198g intermediate a and 0.0039g cesium fluoride were added sequentially to a container and stirred at 110°C for 3 hours. After the reaction was completed, the mixture was cooled, dissolved, precipitated, centrifuged and vacuum dried to obtain the hydrophobic modifier.

[0036] This embodiment discloses a safe and easy-to-tear fireworks fuse paper adhesive product, which is composed of cotton paper, polyester film backing paper and modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive is composed of 84 parts of composite resin, 17 parts of phthalic anhydride, 5 parts of dioctyl terephthalate, 11 parts of silica, 35 parts of ethyl acetate, 3 parts of hydrophobic modifier and 2 parts of KH-560.

[0037] This embodiment discloses a method for preparing a safe and easy-to-tear fireworks fuse adhesive product, including the following steps: Step 1: Slowly add the composite resin to ethyl acetate and stir to mix. Then add dioctyl terephthalate and KH-560 in sequence and stir until dispersed to obtain a mixture. Step 2: After drying and cooling the silica, add it to the mixture, stir and mix, add the hydrophobic modifier, stir, add phthalic anhydride, stir, mature, filter, stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

[0038] Comparative Example 1: Compared with Example 1, Comparative Example 1 used bisphenol A type epoxy resin E51 instead of composite resin in the process of preparing safe and easy-to-tear fireworks fuse paper adhesive product, while keeping other conditions unchanged.

[0039] Comparative Example 2: Compared with Example 1, Comparative Example 2 did not add a hydrophobic modifier in the process of preparing a safe and easy-to-tear fireworks fuse paper adhesive product, and all other conditions remained unchanged.

[0040] The lead paper adhesive products prepared in Examples 1-4 and Comparative Examples 1-2 were subjected to performance tests. The initial tack was tested according to GB / T 4852-2002, the holding power according to GB / T 4851-2014, the peel strength according to GB / T 2792-2014, the hydrophobicity according to GB / T 30693-2014, and the flame retardancy according to GB / T 15903-1995. The test results are shown in Table 1. Table 1 project Maximum size of steel ball Hold time / h <![CDATA[Peeling strength / N·mm -1 > Burning time / s Contact angle / ° Example 1 15 237 0.65 2 132 Example 2 14 235 0.63 3 130 Example 3 14 236 0.62 2 131 Example 4 14 235 0.64 2 129 Comparative Example 1 5 168 0.43 12 130 Comparative Example 2 14 235 0.63 3 93 The initial tack was assessed using the inclined plane rolling ball method, which measured the adhesion of steel balls to the sample surface. A larger maximum steel ball size indicated greater initial tack. The time it took for the sample to maintain its tackiness was recorded by vertically suspending a 1000g weight; a longer retention time indicated better adhesion. A higher peel strength value indicated better bonding strength. The burning time was recorded using a suspension method; a shorter burning time indicated better flame resistance. In contact angle measurement, a larger contact angle indicated stronger hydrophobicity. Table 1 shows that samples with excellent adhesion, hydrophobicity, and flame resistance can be prepared using the methods of Examples 1-4. A comparison between Comparative Example 1 and Examples 1-4 shows that the use of composite resin effectively improves the adhesion and flame resistance of the samples. A comparison between Comparative Example 2 and Examples 1-4 shows that adding a hydrophobic modifier effectively improves the hydrophobicity of the samples.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A safe and easy-to-tear fireworks fuse adhesive product, characterized in that: It consists of cotton paper, a base paper, and a modified hot melt adhesive coated on the surface of the cotton paper. The modified hot melt adhesive is composed of 80-96 parts of composite resin, 15-24 parts of curing agent, 4-9 parts of plasticizer, 10-15 parts of filler, 30-50 parts of solvent, 2-6 parts of hydrophobic modifier, and 1-6 parts of additives. The composite resin is prepared from butyric acid, bisphenol A type epoxy resin E51, carboxymethyl chitosan, nano boron nitride, and phosphorus oxychloride. The hydrophobic modifier is prepared from dodecanediol, 1,1'-carbonyldiimidazole, and cesium fluoride.

2. The safe and easy-to-tear fireworks fuse adhesive product according to claim 1, characterized in that, The method for preparing the composite resin includes the following steps: Q1: Under nitrogen protection, butyric acid and bisphenol A type epoxy resin E51 were added to the reaction vessel, then tetraethylammonium bromide was added, the reaction was carried out, and then the temperature was lowered. Tetraethylammonium bromide and acrylic acid containing p-hydroxyanisole were added. After the addition, the temperature was maintained and the reaction was carried out. After the reaction was completed, the temperature was lowered to obtain product 1. Q2: Add carboxymethyl chitosan and KH-550 to a container containing anhydrous ethanol, seal, ultrasonically disperse, stir, centrifuge, wash, and vacuum dry to obtain modified carboxymethyl chitosan; add nano boron nitride to a container containing sodium hydroxide solution, stir in a water bath, then stir, filter, wash, and dry to obtain hydroxylated boron nitride; add modified carboxymethyl chitosan and deionized water to a container, stir, add hydroxylated boron nitride, and continue stirring to react to obtain product 2; Q3: Add product 2 to product 1, heat and stir in a water bath to obtain product 3. Add phosphorus oxychloride and acetone to a container, add a mixture of acetone and product 3 under nitrogen atmosphere, stir and react, filter, and distill under reduced pressure to obtain product 4. Add deionized water, triethylamine and acetone to a container, then add a mixture of product 4 and acetone. After the addition is complete, stir and react. After the reaction is complete, remove water, filter, and rotary evaporate to obtain composite resin.

3. The safe and easy-to-tear fireworks fuse adhesive product according to claim 2, characterized in that, In Q1, the ratio of butyric acid to bisphenol A type epoxy resin E51 is (0.8-1.2) g : (9-12) g.

4. The safe and easy-to-tear fireworks fuse adhesive product according to claim 2, characterized in that, In Q2, the ratio of carboxymethyl chitosan, KH-550 and anhydrous ethanol is (1-3) g: (1.2-2.2) g: (10-14) mL; the ratio of nano boron nitride and sodium hydroxide solution is (1-2) g: (8-12) mL; and the ratio of modified carboxymethyl chitosan, deionized water and hydroxylated boron nitride is (1-1.5) g: (10-12) mL: (1.2-1.5) g.

5. The safe and easy-to-tear fireworks fuse adhesive product according to claim 2, characterized in that, In Q3, the ratio of product 2 to product 1 is (3-5) g: (80-88) g; the ratio of phosphorus oxychloride to product 3 is (1-2) g: (0.9-1.3) g; and the ratio of deionized water, triethylamine and product 4 is (10-14) mL: (1-2) g: (2-2.5) g.

6. The safe and easy-to-tear fireworks fuse adhesive product according to claim 1, characterized in that, The preparation method of the hydrophobic modifier includes the following steps: S1: Dodecanediol was added to a container containing N,N-dimethylformamide and stirred at room temperature. Then, 1,1'-carbonyldiimidazole was added under an argon atmosphere and the mixture was stirred to react. After the reaction was completed, the mixture was washed, filtered, and dried under vacuum to obtain intermediate a. S2: Dodecanediol, intermediate a and cesium fluoride are added sequentially to a container, stirred and reacted. After the reaction is complete, the mixture is cooled, dissolved, precipitated, centrifuged, and vacuum dried to obtain the hydrophobic modifier.

7. The safe and easy-to-tear fireworks fuse adhesive product according to claim 6, characterized in that, In S1, the ratio of dodecanediol, N,N-dimethylformamide, and 1,1'-carbonyldiimidazole is (1.012-1.236) g : (20-25) mL : (2.026-2.188) g; in S2, the ratio of dodecanediol, intermediate a, and cesium fluoride is (0.102-0.115) g : (0.195-0.211) g : (0.0038-0.0042) g.

8. The safe and easy-to-tear fireworks fuse adhesive product according to claim 1, characterized in that, The curing agent is composed of one or more of toluene diisocyanate, diethylenetriamine, m-phenylenediamine, phthalic anhydride, and tetrahydrophthalic anhydride; the plasticizer is composed of one or more of dioctyl phthalate, dioctyl terephthalate, dioctyl adipate, tricresyl phosphate, and tributyl citrate; the filler is composed of one or more of calcium carbonate, talc, silica, magnesium hydroxide, and wollastonite; the solvent is composed of one or more of ethyl acetate, acetone, butanone, ethanol, n-hexane, and isopropanol; and the additives are composed of one or more of KH-550, KH-560, and KH-570.

9. The method for preparing the safe and easy-to-tear fireworks fuse adhesive product as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Slowly add the composite resin to the solvent and stir to mix. Then add the plasticizer and additives in sequence and stir until dispersed to obtain the mixture. Step 2: After drying and cooling the filler, add it to the mixture, stir and mix, then add the hydrophobic modifier, stir, add the curing agent, stir, mature, filter, let stand, defoam, and obtain the modified hot melt adhesive. Step 3: Coating the cotton paper with one smooth side and one rough side with a base paper using a coating machine, with the rough side of the cotton paper being the laminated side. Then, directly apply modified hot melt adhesive on the coating machine and roll it up. The modified hot melt adhesive penetrates the cotton paper and bonds with the base paper to obtain a safe and easy-to-tear fireworks fuse paper adhesive product.

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