Functional adhesive for cigarette making and connecting and manufacturing method of functional adhesive

Abstract

The invention relates to the technical field of adhesives, and discloses a functional adhesive for cigarette making and connecting and a manufacturing method thereof.The functional adhesive is prepared by preparing an intumescent multi-element flame retardant as an additive and mixing the intumescent multi-element flame retardant with a water-based acrylate emulsion. As the intumescent multi-element flame retardant has curdlan with a cross-linked structure, the intumescent multi-element flame retardant has a relatively high carbon formation rate during combustion, so that the intumescent multi-element flame retardant can be used as a carbon source, a phosphorus element in a functional connecting agent structure can catalyze the carbon source to form a compact carbon layer structure, and a large amount of gas generated by combustion of a nitrogen element can enable the carbon layer to generate an intumescent structure; the silicon element is deposited on the surface of the carbon layer to generate a supporting effect and prevent negative effects caused by collapse of the carbon layer, so that fire spreading caused by melt dripping is avoided, and the intumescent multi-element flame retardant has multi-element synergistic flame-retardant elements, so that the effect of greatly enhancing the flame retardant property of the adhesive by adding a small amount of the intumescent multi-element flame retardant can be achieved.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, and more specifically to a functional adhesive for rolling cigarettes and its manufacturing method. Background Technology

[0002] In the cigarette manufacturing process, adhesives are key auxiliary materials that connect cigarette paper, filter rods, tipping paper, and packaging materials. Their performance directly affects the physical stability, processing efficiency, and safety of cigarettes. With the cigarette industry's development towards higher speeds, automation, and environmental friendliness, adhesive technology has evolved from natural materials to synthetic polymers, gradually forming a system dominated by water-based emulsion adhesives. Currently, the core functions of adhesives are high bonding strength to ensure efficient cigarette production, and environmental safety characteristics to prevent the generation of large amounts of volatile substances that could cause environmental damage.

[0003] Waterborne acrylic adhesives possess excellent bonding properties and can be used as adhesives in cigarette manufacturing. However, as cigarettes are a continuous source of combustion, the flame-retardant properties of their adhesives directly affect fire risk. For example, unretardant adhesives may melt and drip at high temperatures, igniting surrounding combustibles. With the increasing number of fires caused by discarded cigarette butts in recent years, the flame-retardant properties of adhesives used in cigarette manufacturing have become increasingly important. Conventional waterborne acrylic adhesives are flammable materials and cannot meet flame-retardant requirements. Therefore, developing a waterborne acrylic adhesive with excellent flame-retardant properties is of great significance for its application in the cigarette manufacturing field. Summary of the Invention

[0004] In order to solve the problems mentioned in the background art, the object of the present invention is to provide a functional adhesive for cigarette rolling and a method for manufacturing the same.

[0005] The objective of this invention can be achieved through the following technical solutions: A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 65-75 parts of water-based acrylic emulsion; 1-3.5 parts of intumescent multi-component flame retardant; 10-20 parts of thickener; 0.5-1.5 parts of defoamer.

[0006] As a further aspect of the present invention, the preparation method of the intumescent multi-element flame retardant includes the following steps: Step 1: Add the sorbitol to dimethyl sulfoxide and stir until well mixed. Then add the carboxylation modifier and catalyst to the mixture. After the addition is complete, raise the temperature to 50-60℃, keep it warm and stir for 2-4 hours, then stop heating, cool down and discharge the material, collect the solid material to obtain the carboxyl-modified sorbitol. Step 2: Add the carboxyl-modified ketone gum to a 50-60% (v / v) ethanol aqueous solution and mechanically stir until a homogeneous mixture is formed. Then add the condensing agent and accelerator to the mixture. After the addition is complete, stir at room temperature for 20-40 minutes. Next, add the functional binder to the mixture and stir at room temperature for 6-12 hours. Then stop stirring, filter out the solid material, and obtain the intumescent multi-element flame retardant through washing and freeze-drying processes.

[0007] As a further aspect of the present invention, in step one, the carboxylation modifying agent is any one of maleic anhydride, succinic anhydride, or glutaric anhydride.

[0008] As a further aspect of the present invention, in step one, the catalyst is pyridine.

[0009] As a further embodiment of the present invention, in step two, the condensing agent is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride or dicyclohexylcarbodiimide; the accelerator is any one of 4-dimethylaminopyridine, N-hydroxysuccinimide or 1-hydroxyphenyltriazole.

[0010] In the above technical solution, firstly, carboxylation modification reagent is used to carboxylate the colloid, thereby introducing active carboxyl functional groups into the colloid molecular chain to obtain carboxyl-modified colloid. Then, under the action of condensing agent and accelerator, the active carboxyl groups in its structure can undergo a continuous condensation reaction with the active amino substituents at the end of the functional linker structure to obtain a colloid derivative with a cross-linked structure, namely an intumescent multi-element flame retardant.

[0011] As a further aspect of the present invention, in step two, the preparation method of the functional binder includes the following steps: Step S1: Add disodium salt of 5'-adenine nucleotide and acetone to the reaction vessel, start stirring, mix evenly, and place in an ice bath environment. Then add N,N-di(2-chloroethyl)carbamoyl chloride and triethylamine to the reaction vessel. After the addition is complete, remove from the ice bath and stir at 30-40℃ for 3-6 hours. Evaporate the solvent, collect the product, and purify it to obtain the adenine nucleotide derivative. Step S2: Add adenine nucleotide derivative, 1,3-bis(aminopropane)tetramethyldisiloxane and toluene to the polymerization reactor. After the addition is complete, purge with nitrogen for protection, mechanically stir to mix, control the heating rate at 2-3℃ / min, raise the temperature to 70-80℃, keep it at this temperature and stir for 8-16 hours, stop heating, separate the product, and process it after purification to obtain the functional linker.

[0012] As a further aspect of the present invention, in step S1, the molar ratio of the disodium salt of 5'-adenine nucleotide and N,N-bis(2-chloroethyl)carbamoyl chloride is 1:1.

[0013] As a further aspect of the present invention, in step S2, the molar ratio of the adenine nucleotide derivative and 1,3-bis(aminopropane)tetramethyldisilether is 1:1.05-1.1.

[0014] In the above technical solution, adenine nucleotide derivatives and N,N-di(2-chloroethyl)carbamoyl chloride are used as reactants. The amino substituents in their structures can undergo amidation reactions with the acyl chloride substituents to obtain an adenine nucleotide derivative containing two equivalent halogen substituents. The halogen substituents in its structure can continuously replace the amino substituents at the end of the 1,3-bis(aminopropane)tetramethyldisiloxane structure under high temperature conditions to obtain a macromolecular functional linker with a continuous structure. By controlling the ratio of the two, the obtained functional linker can be made to exhibit amino-terminated behavior.

[0015] As a further embodiment of the present invention, the tackifier is rosin resin; the defoamer is alkylphenol polyoxyethylene ether.

[0016] A method for manufacturing a functional adhesive for cigarette rolling includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion, intumescent multi-element flame retardant and tackifier to a high-speed mixer and mechanically mix them at a speed of 1000-1500 r / min for 20-40 min to form a premix. Third step: Adjust the speed to 300-500 r / min, add defoamer to the premix, stir for 10-20 minutes after adding, stop stirring, let stand for 20-40 minutes, and then discharge to obtain the functional adhesive.

[0017] The beneficial effects of this invention are: This invention prepares an intumescent multi-component flame retardant as an additive, which is then mixed with an aqueous acrylic emulsion to obtain a functional adhesive. Because the intumescent multi-component flame retardant itself has a cross-linked structure, it exhibits a high char formation rate during combustion, thus serving as a carbon source. The phosphorus element in the functional binder structure catalyzes the formation of a dense carbon layer structure from the carbon source. The large amount of gas generated by the combustion of nitrogen allows the carbon layer to expand, preventing the spread of fire. Silicon elements deposit on the surface of the carbon layer provide support, preventing the negative impact of carbon layer collapse and thus avoiding the spread of fire caused by melting and dripping. By utilizing the synergistic flame-retardant elements in the intumescent multi-component flame retardant, a small amount can significantly enhance the flame-retardant performance of the adhesive.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0020] Preparation Example Preparation of intumescent multi-component flame retardants: Step 1: Add 3.8g of ketorum to dimethyl sulfoxide and stir until well mixed. Then add 2.5g of succinic anhydride and 0.3g of pyridine to the mixture. After the addition is complete, raise the temperature to 50℃, keep it warm and stir for 3 hours, then stop heating, cool down and discharge the material, collect the solid material to obtain carboxyl-modified ketorum. Step 2: Add 2.6g of carboxyl-modified ketone gum to a 50% (v / v) ethanol aqueous solution and mechanically stir until a homogeneous mixture is formed. Then, add 0.3g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 0.1g of N-hydroxysuccinimide to the mixture. After the addition is complete, stir at room temperature for 30 minutes. Then, add 0.5g of functional binder to the mixture and stir at room temperature for 9 hours. After stirring, stop stirring, filter out the solid material, and obtain an intumescent multi-element flame retardant through washing and freeze-drying processes.

[0021] The functional binder is prepared using the following method: Step S1: Add 0.8g of disodium 5'-adenine nucleotide and acetone to the reaction vessel, start stirring, mix evenly, and place in an ice bath environment. Then add 0.44g of N,N-bis(2-chloroethyl)carbamoyl chloride and triethylamine to the reaction vessel. After the addition is complete, remove from the ice bath and stir at 35°C for 4 hours. Evaporate the solvent, collect the product, and purify it to obtain the adenine nucleotide derivative. Step S2: Add 0.5g of adenine nucleotide derivative, 0.25g of 1,3-bis(aminopropane)tetramethyldisiloxane and toluene to the polymerization reactor. After the addition is complete, purge with nitrogen for protection, mechanically stir and mix, control the heating rate to 3℃ / min, raise the temperature to 75℃, keep it at this temperature and stir for 9h, stop heating, separate the product, and process it after purification to obtain the functional linker.

[0022] Example 1 A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 65 parts of water-based acrylic emulsion; One part of intumescent multi-component flame retardant; Tackifier: 10 parts rosin resin; 0.5 parts of defoamer alkylphenol polyoxyethylene ether.

[0023] The method for manufacturing the functional adhesive includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion, the intumescent multi-element flame retardant, and the tackifier rosin resin into a high-speed mixer and mechanically mix them at a speed of 1500 r / min for 30 min to form a premix. Third step: Adjust the speed to 500r / min, add the defoamer alkylphenol polyoxyethylene ether to the premix, stir for 10 minutes after addition, stop stirring, let stand for 30 minutes, and then discharge to obtain the functional adhesive.

[0024] The preparation method of the intumescent multi-component flame retardant is shown in the preparation example, and the same applies to the following.

[0025] Example 2 A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 68 parts of water-based acrylic emulsion; Three parts of intumescent multi-component flame retardant; 15 parts of rosin resin as a tackifier; One part of defoamer alkylphenol polyoxyethylene ether.

[0026] The method for manufacturing the functional adhesive includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion, the intumescent multi-element flame retardant, and the tackifier rosin resin into a high-speed mixer and mechanically mix them at a speed of 1500 r / min for 30 min to form a premix. Third step: Adjust the speed to 500r / min, add the defoamer alkylphenol polyoxyethylene ether to the premix, stir for 10 minutes after addition, stop stirring, let stand for 30 minutes, and then discharge to obtain the functional adhesive.

[0027] Example 3 A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 75 parts of water-based acrylic emulsion; 3.5 parts of intumescent multi-component flame retardant; Tackifier: 20 parts rosin resin; 1.5 parts of alkylphenol polyoxyethylene ether defoamer.

[0028] The method for manufacturing the functional adhesive includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion, the intumescent multi-element flame retardant, and the tackifier rosin resin into a high-speed mixer and mechanically mix them at a speed of 1500 r / min for 30 min to form a premix. Third step: Adjust the speed to 500r / min, add the defoamer alkylphenol polyoxyethylene ether to the premix, stir for 10 minutes after addition, stop stirring, let stand for 30 minutes, and then discharge to obtain the functional adhesive.

[0029] Comparative Example 1 A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 68 parts of water-based acrylic emulsion; 3 parts of disodium 5'-adenine nucleotide; 15 parts of rosin resin as a tackifier; One part of defoamer alkylphenol polyoxyethylene ether.

[0030] The method for manufacturing the functional adhesive includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step involves adding the water-based acrylic emulsion, disodium 5'-adenine nucleotide, and rosin resin (a thickener) to a high-speed mixer and mechanically mixing them at 1500 rpm for 30 minutes to form a premix. Third step: Adjust the speed to 500r / min, add the defoamer alkylphenol polyoxyethylene ether to the premix, stir for 10 minutes after addition, stop stirring, let stand for 30 minutes, and then discharge to obtain the functional adhesive.

[0031] Comparative Example 2 A functional adhesive for cigarette rolling, comprising, by weight, the following raw materials: 68 parts of water-based acrylic emulsion; 15 parts of rosin resin as a tackifier; One part of alkylphenol polyoxyethylene ether defoamer.

[0032] The method for manufacturing the functional adhesive includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion and the tackifier rosin resin into a high-speed mixer and mechanically mix them at a speed of 1500 r / min for 30 min to form a premix. Third step: Adjust the speed to 500r / min, add the defoamer alkylphenol polyoxyethylene ether to the premix, stir for 10 minutes after addition, stop stirring, let stand for 30 minutes, and then discharge to obtain the functional adhesive.

[0033] Performance testing The functional adhesives used in the examples and comparative examples were prepared into adhesive film test samples that met the specifications. The limiting oxygen index of the samples was tested according to standard GB / T 2406.2-2009, and the test results are recorded in the table below: Table 1 - Test Results Analysis of the test results shows that the adhesives prepared in the embodiments of the present invention all exhibited excellent flame retardant properties. After replacing the intumescent multi-component flame retardant with 5'-adenine nucleotide disodium salt, the char-forming material was lost, and the multi-component integrated intumescent flame retardant could not be formed, thus the flame retardant properties decreased significantly.

[0034] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely to aid in understanding the method and core ideas of the present invention, including the best mode, and to enable any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combined method. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims. The scope of protection of this patent is defined by the claims and may include other embodiments that can be conceived by those skilled in the art. If these other embodiments have structural elements similar to those expressed in the claims, or if they include equivalent structural elements that are not substantially different from those expressed in the claims, then these other embodiments should also be included within the scope of the claims.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A functional adhesive for rolling cigarettes, characterized in that, By weight, it includes the following ingredients: 65-75 parts of water-based acrylic emulsion; 1-3.5 parts of intumescent multi-component flame retardant; 10-20 parts of thickener; 0.5-1.5 parts of defoamer.

2. The functional adhesive for cigarette rolling according to claim 1, characterized in that, The preparation method of the intumescent multi-element flame retardant includes the following steps: Step 1: Add the sorbitol to dimethyl sulfoxide and stir until well mixed. Then add the carboxylation modifier and catalyst to the mixture. After the addition is complete, raise the temperature to 50-60℃, keep it warm and stir for 2-4 hours, then stop heating, cool down and discharge the material, collect the solid material to obtain the carboxyl-modified sorbitol. Step 2: Add the carboxyl-modified ketone gum to a 50-60% (v / v) ethanol aqueous solution and mechanically stir until a homogeneous mixture is formed. Then add the condensing agent and accelerator to the mixture. After the addition is complete, stir at room temperature for 20-40 minutes. Next, add the functional binder to the mixture and stir at room temperature for 6-12 hours. Then stop stirring, filter out the solid material, and obtain the intumescent multi-element flame retardant through washing and freeze-drying processes.

3. The functional adhesive for cigarette rolling according to claim 2, characterized in that, In step one, the carboxylation modifying agent is any one of maleic anhydride, succinic anhydride, or glutaric anhydride.

4. The functional adhesive for cigarette rolling according to claim 2, characterized in that, In step one, the catalyst is pyridine.

5. The functional adhesive for cigarette rolling according to claim 2, characterized in that, In step two, the condensing agent is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride or dicyclohexylcarbodiimide; the accelerator is any one of 4-dimethylaminopyridine, N-hydroxysuccinimide or 1-hydroxyphenyltriazole.

6. The functional adhesive for cigarette rolling according to claim 2, characterized in that, In step two, the preparation method of the functional binder includes the following steps: Step S1: Add disodium salt of 5'-adenine nucleotide and acetone to the reaction vessel, start stirring, mix evenly, and place in an ice bath environment. Then add N,N-di(2-chloroethyl)carbamoyl chloride and triethylamine to the reaction vessel. After the addition is complete, remove from the ice bath and stir at 30-40℃ for 3-6 hours. Evaporate the solvent, collect the product, and purify it to obtain the adenine nucleotide derivative. Step S2: Add adenine nucleotide derivative, 1,3-bis(aminopropane)tetramethyldisiloxane and toluene to the polymerization reactor. After the addition is complete, purge with nitrogen for protection, mechanically stir to mix, control the heating rate at 2-3℃ / min, raise the temperature to 70-80℃, keep it at this temperature and stir for 8-16 hours, stop heating, separate the product, and process it after purification to obtain the functional linker.

7. The functional adhesive for cigarette rolling according to claim 6, characterized in that, In step S1, the molar ratio of the disodium salt of 5'-adenine nucleotide and N,N-bis(2-chloroethyl)carbamoyl chloride is 1:

1.

8. The functional adhesive for cigarette rolling according to claim 6, characterized in that, In step S2, the molar ratio of the adenine nucleotide derivative and 1,3-bis(aminopropane)tetramethyldisilether is 1:1.05-1.

1.

9. The functional adhesive for cigarette rolling according to claim 1, characterized in that, The tackifier is rosin resin; the defoamer is alkylphenol polyoxyethylene ether.

10. A method for manufacturing a functional adhesive for cigarette rolling as described in claim 1, characterized in that, Includes the following steps: Step 1: Weigh each raw material according to the specified weight proportions to complete the material preparation; The second step is to add the water-based acrylic emulsion, intumescent multi-element flame retardant and tackifier to a high-speed mixer and mechanically mix them at a speed of 1000-1500 r / min for 20-40 min to form a premix. Third step: Adjust the speed to 300-500 r / min, add defoamer to the premix, stir for 10-20 minutes after adding, stop stirring, let stand for 20-40 minutes, and then discharge to obtain the functional adhesive.

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