Wear-resistant butyronitrile glove and preparation method thereof

Abstract

The invention discloses a wear-resistant butyronitrile glove and a preparation method thereof. Comprising the following steps: step 1, adding butyronitrile latex, sulfur, modified silicon dioxide, sodium dodecyl benzene sulfonate, titanium dioxide, nekal and tetrahydrofuran into a dispersion machine, stirring, and screening with a 80-100-mesh screen to obtain butyronitrile latex emulsion; step 2, immersing the hand mold into an acid tank, cleaning, drying, immersing into a calcium salt solution, immersing, and drying, so as to obtain a pretreated hand mold; and 3, immersing the pretreated hand mold into the butyronitrile rubber emulsion, dipping, drying, leaching, putting into a vulcanizing furnace, vulcanizing, and carrying out post-treatment to obtain the butyronitrile gloves. The preparation method has the beneficial effects that a modifier containing a specific group is designed through multi-step organic synthesis, and is covalently grafted to the surface of sulfhydrylated silicon dioxide through a click reaction; the interface defect of physical blending is effectively avoided, so that the overall wear resistance, flame retardance and antibacterial property of the material are synchronously enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of gloves, and in particular, relates to a wear-resistant nitrile glove and a preparation method thereof. Background Art

[0002] Nitrile gloves (NBR gloves) are high-performance protective gloves made of nitrile rubber, which have many significant advantages and are widely used in medical, industrial, food processing and other fields. First of all, nitrile gloves have excellent chemical resistance and can effectively resist the erosion of chemical substances such as grease, fuel, acid and alkali.

[0003] However, existing nitrile gloves still have shortcomings in terms of wear resistance, especially in high-intensity friction and repeated use scenarios, the surface of the gloves is easily worn, resulting in a decrease in protective performance. In order to improve wear resistance, traditional methods often enhance the hardness of the material by adding fillers (such as calcium carbonate, silica, etc.), but the poor dispersion of fillers may cause uneven internal structure of the gloves, affecting its overall performance; at the same time, while pursuing higher wear resistance, antibacterial and flame retardant properties may also be affected, because the addition of fillers may interfere with the antibacterial coating of nitrile rubber or the uniform distribution of flame retardants, thereby reducing the antibacterial and flame retardant effects. In addition, in order to achieve antibacterial and flame retardant functions, it is usually necessary to add specific functional materials to the gloves, but these materials may be incompatible with fillers that enhance wear resistance, and may even undergo chemical reactions during processing, resulting in performance degradation.

[0004] Therefore, in order to solve the above problems, the present invention prepares a wear-resistant nitrile glove. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a wear-resistant nitrile glove and a preparation method thereof.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A method for preparing wear-resistant nitrile gloves comprises the following steps:

[0008] Step 1: Add nitrile latex, sulfur, modified silica, sodium dodecylbenzene sulfonate, titanium dioxide, sodium dibutylnaphthalene sulfonate, and tetrahydrofuran into a disperser, stir for 1-2 hours at 25-35° C., and then pass through an 80-100 mesh sieve to obtain nitrile latex;

[0009] Step 2: Immerse the hand mold in an acid tank for cleaning, dry it, immerse it in a calcium salt solution for 10-20 seconds, and then dry it at 60-80°C for 1-2 minutes to obtain a pretreated hand mold;

[0010] Step 3: Immerse the pretreated hand mold in nitrile rubber latex at 25-35°C for 10-30s, dry it, place it in clean water at 60-70°C, leach it for 30-40min, then place it in a vulcanization furnace at 100-130°C, vulcanize it for 10-30min, and post-treat it to obtain nitrile gloves.

[0011] More optimally, the nitrile rubber latex includes the following components: by weight, 300-400 parts of nitrile rubber latex, 1-2 parts of sulfur, 20-22 parts of modified silicon dioxide, 5-6 parts of sodium dodecylbenzene sulfonate, 1-2 parts of titanium dioxide, 2-3 parts of sodium dibutylnaphthalene sulfonate, and 100-120 parts of tetrahydrofuran.

[0012] More optimally, the preparation process of the modified silicon dioxide is:

[0013] S1: Add 3-bromomethylbenzoic acid, 3-amino-5-hydroxy-1-pentene and N,N'-dicyclohexylcarbodiimide to dichloromethane, stir evenly, heat to 70-80°C, react for 3-4h, cool to room temperature, remove the solvent by rotary evaporation, transfer to acetonitrile after purification, add triphenylphosphine, react at 80-90°C for 20-22h, remove the solvent by vacuum distillation to obtain reaction intermediate A;

[0014] S2: Mix reaction intermediate A, o-methoxyphenol, anhydrous ethanol and concentrated sulfuric acid, heat to 40-50°C, react for 15-18h, filter out the solid after the reaction, wash with water until neutral, and then recrystallize with ethanol to obtain reaction intermediate B;

[0015] S3: Mix the reaction intermediate B, triethylamine and ethyl acetate, perform ultrasonic treatment for 20-30 min, add phenylphosphoryl dichloride solution, raise the temperature to 70-80° C. under protective atmosphere, react for 20-22 h, filter, wash and dry to obtain a modifier;

[0016] S4: Under a protective atmosphere, add thiolated silica to ethanol, ultrasonically disperse for 30-40 minutes, then add a modifier and azobisisobutyronitrile, raise the temperature to 90-95°C, react for 3-4 hours, cool to room temperature, filter, wash, and dry to obtain modified silica.

[0017] In the scheme, the carboxyl group (-COOH) in 3-bromomethylbenzoic acid and the amino group (-NH2) in 3-amino-5-hydroxy-1-pentene undergo amidation reaction under the action of N,N'-dicyclohexylcarbodiimide (DCC); then triphenylphosphine, as a nucleophilic reagent, can react with the bromine group contained therein to finally obtain the reaction intermediate A. The specific reaction is shown below:

[0018]

[0019] In the scheme, the hydroxyl group of the reaction intermediate A is catalyzed by concentrated sulfuric acid, protonated and dehydrated to form a carbon cation. The carbon cation acts as an electrophilic reagent to attack the para position of the hydroxyl group on the benzene ring of o-methoxyphenol to form a carbon-carbon bond to obtain the reaction intermediate B. The specific reaction is shown below:

[0020]

[0021] In the scheme, the hydroxyl group of intermediate B reacts with phenylphosphoryl dichloride under alkaline conditions (triethylamine) to form a phosphate bond to obtain a modifier, the structure of which is shown below:

[0022]

[0023] In the scheme, under the action of azobisisobutyronitrile (free radical initiator), the double bond of the modifier undergoes a free radical addition reaction with the -SH group on the surface of thiolated silica to form a covalent bond; the modifier is firmly grafted to the silica surface through a thioether bond, giving it specific functions.

[0024] More optimally, the raw materials of the reaction intermediate A include the following substances: by weight, 10-12 parts of 3-bromomethylbenzoic acid, 5-6 parts of 3-amino-5-hydroxy-1-pentene, 0.1-0.2 parts of N,N'-dicyclohexylcarbodiimide, 80-100 parts of dichloromethane, 150-180 parts of acetonitrile, and 15-18 parts of triphenylphosphine.

[0025] More optimally, the raw materials of the reaction intermediate B include the following components: by weight, 10-12 parts of the reaction intermediate A, 3-4 parts of o-methoxyphenol, 60-70 parts of anhydrous ethanol, and 0.3-0.4 parts of concentrated sulfuric acid.

[0026] More optimally, the modifier raw material includes the following components: by weight, 15-18 parts of reaction intermediate B, 0.1-0.2 parts of triethylamine, 80-100 parts of ethyl acetate, and 8-10 parts of phenylphosphoryl dichloride solution.

[0027] More optimally, the modified silicon dioxide comprises the following components: by weight, 10-12 parts of mercapto silicon dioxide, 100-110 parts of ethanol, 5-8 parts of modifier, and 0.1-0.2 parts of azobisisobutyronitrile.

[0028] More optimally, the preparation process of the mercapto silica is: under a protective atmosphere, silica is dispersed in ethanol, a mixed solution of 3-mercaptopropyltrimethoxysilane and methanol is added, the temperature is raised to 60-70°C, stirred for reaction for 20-30 minutes, then ammonia water is added, the reaction is continued for 4-5 hours, cooled to room temperature, filtered, washed, and dried to obtain mercapto silica.

[0029] More optimally, the mercaptolated silicon dioxide raw material comprises the following components: by weight, 1-2 parts of silicon dioxide, 300-350 parts of ethanol, 1-2 parts of 3-mercaptopropyltrimethoxysilane, 80-100 parts of methanol, and 0.4-0.8 parts of ammonia water.

[0030] Beneficial effects of the present invention:

[0031] The present invention designs a modifier containing a specific group through multi-step organic synthesis, and covalently grafts it to the surface of mercapto-silica through a click reaction; effectively avoiding the interface defects of physical blending, so that the wear resistance, flame retardancy and antibacterial properties of the whole material are enhanced simultaneously. The details are as follows:

[0032] First: In the scheme, the surface of silica is chemically modified to make it evenly dispersed in the nitrile rubber matrix, reducing stress concentration and improving the wear resistance and mechanical strength of the material; in addition, silica particles can form a microscopic rough structure on the surface, reducing the friction coefficient and reducing the wear of the gloves during use;

[0033] Second: In the scheme, the phosphate ester and quaternary phosphonium salt groups contained in the obtained modifier can decompose at high temperature to generate phosphoric acid and polyphosphoric acid. These acidic substances can catalyze the dehydration of the polymer substrate into carbon to form a dense carbon layer; at the same time, the amide group contained in the modifier decomposes at high temperature to generate nitrogen-containing gas (such as NH3, N2) and water vapor, which can also dilute the concentration of combustible gas; therefore, the phosphate ester and quaternary phosphonium salt groups provide an efficient phosphorus source, and the amide group provides a nitrogen source. The two are combined to form a stable phosphorus-nitrogen compound, which further optimizes the flame retardant effect;

[0034] Third: The quaternary phosphonium salt groups contained in the modifier can be adsorbed to the negatively charged bacterial surface through electrostatic action, penetrate the cell wall, and improve the antibacterial property of the material. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0036] Embodiment 1: A method for preparing wear-resistant nitrile gloves, comprising the following steps:

[0037] Step 1: Add 300 parts of nitrile latex, 1 part of sulfur, 20 parts of modified silica, 5 parts of sodium dodecylbenzene sulfonate, 1 part of titanium dioxide, 2 parts of sodium dibutylnaphthalene sulfonate, and 100 parts of tetrahydrofuran into a disperser, stir for 1 hour at 25°C, and then pass through an 80-mesh sieve to obtain a nitrile latex;

[0038] Step 2: Immerse the hand mold in an acid tank for cleaning, dry it, immerse it in a calcium salt solution for 10 seconds, and then dry it at 60°C for 1 minute to obtain a pretreated hand mold;

[0039] Step 3: immerse the pretreated hand model in nitrile rubber latex at 25°C for 10 seconds, dry it, place it in clean water at 60°C, leach it for 30 minutes, then place it in a vulcanization furnace at 100°C for vulcanization for 10 minutes, and post-treat it to obtain nitrile gloves;

[0040] Among them, the preparation process of modified silicon dioxide:

[0041] S1: Add 10 parts of 3-bromomethylbenzoic acid, 5 parts of 3-amino-5-hydroxy-1-pentene, and 0.1 parts of N,N'-dicyclohexylcarbodiimide to 80 parts of dichloromethane, stir evenly, heat to 70°C, react for 3 hours, cool to room temperature, remove the solvent by rotary evaporation, transfer to 150 parts of acetonitrile after purification, add 15 parts of triphenylphosphine, react at 80°C for 20 hours, and remove the solvent by vacuum distillation to obtain reaction intermediate A;

[0042] S2: 10 parts of reaction intermediate A, 3 parts of o-methoxyphenol, 60 parts of anhydrous ethanol and 0.3 parts of concentrated sulfuric acid were mixed, the temperature was raised to 40°C, and the reaction was carried out for 15 hours. After the reaction was completed, the solid was filtered out and washed with water until neutral, and then recrystallized with ethanol to obtain reaction intermediate B;

[0043] S3: 15 parts of reaction intermediate B, 0.1 parts of triethylamine and 80 parts of ethyl acetate were mixed, ultrasonically treated for 20 min, 8 parts of phenylphosphoryl dichloride solution (solvent is ethyl acetate) were added, the temperature was raised to 70°C under protective atmosphere, reacted for 20 h, filtered, washed and dried to obtain a modifier;

[0044] S4: Under a protective atmosphere, 10 parts of mercapto silicon dioxide were added to 100 parts of ethanol, and ultrasonically dispersed for 30 minutes, and then 5 parts of a modifier and 0.1 parts of azobisisobutyronitrile were added, the temperature was raised to 90°C, and the reaction was carried out for 3 hours. After cooling to room temperature, the modified silicon dioxide was filtered, washed, and dried to obtain the modified silicon dioxide;

[0045] Among them, the preparation process of mercapto silicon dioxide is: under a protective atmosphere, 1 part of silicon dioxide is dispersed in 300 parts of ethanol, a mixed solution of 1 part of 3-mercaptopropyltrimethoxysilane and 80 parts of methanol is added, the temperature is raised to 60°C, stirred and reacted for 20 minutes, then 0.4 parts of ammonia water are added, the reaction is continued for 4 hours, cooled to room temperature, filtered, washed, and dried to obtain mercapto silicon dioxide.

[0046] Embodiment 2: A method for preparing wear-resistant nitrile gloves, comprising the following steps:

[0047] Step 1: Add 400 parts of nitrile latex, 2 parts of sulfur, 22 parts of modified silica, 6 parts of sodium dodecylbenzene sulfonate, 2 parts of titanium dioxide, 3 parts of sodium dibutylnaphthalene sulfonate, and 120 parts of tetrahydrofuran into a disperser, stir for 2 hours at 35°C, and then pass through a 100-mesh sieve to obtain a nitrile latex;

[0048] Step 2: The hand mold is immersed in an acid tank for cleaning, and after drying, immersed in a calcium salt solution for 20 seconds, and then dried at 80° C. for 2 minutes to obtain a pretreated hand mold;

[0049] Step 3: Immerse the pretreated hand model in nitrile rubber latex at 35°C for 30 seconds, dry it, place it in clean water at 70°C, leach it for 40 minutes, then place it in a vulcanization furnace at 130°C for vulcanization for 30 minutes, and post-treat it to obtain nitrile gloves;

[0050] Among them, the preparation process of modified silicon dioxide:

[0051] S1: Add 12 parts of 3-bromomethylbenzoic acid, 6 parts of 3-amino-5-hydroxy-1-pentene, and 0.2 parts of N,N'-dicyclohexylcarbodiimide to 100 parts of dichloromethane, stir evenly, heat to 80°C, react for 4 hours, cool to room temperature, remove the solvent by rotary evaporation, transfer to 180 parts of acetonitrile after purification, add 18 parts of triphenylphosphine, react at 90°C for 22 hours, and remove the solvent by vacuum distillation to obtain reaction intermediate A;

[0052] S2: 12 parts of reaction intermediate A, 4 parts of o-methoxyphenol, 70 parts of anhydrous ethanol and 0.4 parts of concentrated sulfuric acid were mixed, heated to 50°C, and reacted for 18 hours. After the reaction, the solid was filtered out and washed with water until neutral, and then recrystallized with ethanol to obtain reaction intermediate B;

[0053] S3: 18 parts of reaction intermediate B, 0.2 parts of triethylamine and 100 parts of ethyl acetate were mixed, ultrasonically treated for 30 min, 10 parts of phenylphosphoryl dichloride solution (solvent is ethyl acetate) were added, the temperature was raised to 80°C under protective atmosphere, reacted for 22 h, filtered, washed and dried to obtain a modifier;

[0054] S4: Under a protective atmosphere, 12 parts of mercapto silicon dioxide were added to 110 parts of ethanol, and ultrasonically dispersed for 40 minutes, and then 8 parts of a modifier and 0.2 parts of azobisisobutyronitrile were added, and the temperature was raised to 95° C., and the reaction was carried out for 4 hours. After cooling to room temperature, the modified silicon dioxide was filtered, washed, and dried to obtain the modified silicon dioxide;

[0055] Among them, the preparation process of mercaptosilicic acid silica is as follows: under a protective atmosphere, 2 parts of silica are dispersed in 350 parts of ethanol, a mixed solution of 2 parts of 3-mercaptopropyltrimethoxysilane and 100 parts of methanol is added, the temperature is raised to 70°C, and the reaction is stirred for 30 minutes, then 0.8 parts of ammonia water is added, the reaction is continued for 5 hours, and the mercaptosilicic acid silica is obtained after cooling to room temperature, filtering, washing, and drying.

[0056] Embodiment 3: A method for preparing wear-resistant nitrile gloves, comprising the following steps:

[0057] Step 1: Add 350 parts of nitrile latex, 1.5 parts of sulfur, 21 parts of modified silica, 5.5 parts of sodium dodecylbenzene sulfonate, 1.5 parts of titanium dioxide, 2.5 parts of sodium dibutylnaphthalene sulfonate, and 110 parts of tetrahydrofuran into a disperser, stir for 1.5 hours at 30°C, and then pass through a 90-mesh sieve to obtain a nitrile latex;

[0058] Step 2: The hand mold is immersed in an acid tank for cleaning, and after drying, immersed in a calcium salt solution for 15 seconds, and then dried at 70° C. for 1.5 minutes to obtain a pretreated hand mold;

[0059] Step 3: Immerse the pretreated hand model in nitrile rubber latex at 30°C for 20 seconds, dry it, place it in clean water at 65°C, leach it for 35 minutes, then place it in a vulcanization furnace at 115°C for vulcanization for 20 minutes, and post-treat it to obtain nitrile gloves;

[0060] Among them, the preparation process of modified silicon dioxide:

[0061] S1: Add 11 parts of 3-bromomethylbenzoic acid, 5.5 parts of 3-amino-5-hydroxy-1-pentene, and 0.15 parts of N,N'-dicyclohexylcarbodiimide to 90 parts of dichloromethane, stir evenly, heat to 75°C, react for 3.5 hours, cool to room temperature, remove the solvent by rotary evaporation, transfer to 165 parts of acetonitrile after purification, add 16.5 parts of triphenylphosphine, react at 85°C for 21 hours, and remove the solvent by vacuum distillation to obtain reaction intermediate A;

[0062] S2: 11 parts of reaction intermediate A, 3.5 parts of o-methoxyphenol, 65 parts of anhydrous ethanol, and 0.35 parts of concentrated sulfuric acid were mixed, heated to 45°C, and reacted for 16.5 hours. After the reaction, the solid was filtered out and washed with water until neutral, and then recrystallized with ethanol to obtain reaction intermediate B;

[0063] S3: 16.5 parts of reaction intermediate B, 0.15 parts of triethylamine and 90 parts of ethyl acetate were mixed, ultrasonically treated for 25 min, 9 parts of phenylphosphoryl dichloride solution (solvent is ethyl acetate) were added, the temperature was raised to 75°C under protective atmosphere, the reaction was carried out for 21 h, filtered, washed and dried to obtain a modifier;

[0064] S4: Under a protective atmosphere, 11 parts of mercapto silicon dioxide were added to 105 parts of ethanol, and ultrasonically dispersed for 35 minutes, and then 6.5 parts of a modifier and 0.15 parts of azobisisobutyronitrile were added, the temperature was raised to 92.5°C, and the reaction was carried out for 3.5 hours. After cooling to room temperature, the modified silicon dioxide was filtered, washed, and dried to obtain the modified silicon dioxide;

[0065] Among them, the preparation process of mercaptosilicic acid silica is as follows: under a protective atmosphere, 1.5 parts of silica are dispersed in 325 parts of ethanol, a mixed solution of 1.5 parts of 3-mercaptopropyltrimethoxysilane and 90 parts of methanol is added, the temperature is raised to 65°C, stirred for reaction for 25 minutes, then 0.6 parts of ammonia water are added, the reaction is continued for 4.5 hours, cooled to room temperature, filtered, washed, and dried to obtain mercaptosilicic acid silica.

[0066] Comparative Example 1: No modification was performed on the silicon dioxide, and the rest was the same as in Example 3, as follows:

[0067] Step 1: Add 350 parts of nitrile latex, 1.5 parts of sulfur, 21 parts of silicon dioxide, 5.5 parts of sodium dodecylbenzene sulfonate, 1.5 parts of titanium dioxide, 2.5 parts of sodium dibutylnaphthalene sulfonate, and 110 parts of tetrahydrofuran into a disperser, stir for 1.5 hours at 30°C, and then pass through a 90-mesh sieve to obtain a nitrile latex;

[0068] Step 2: The hand mold is immersed in an acid tank for cleaning, and after drying, immersed in a calcium salt solution for 15 seconds, and then dried at 70° C. for 1.5 minutes to obtain a pretreated hand mold;

[0069] Step 3: Immerse the pretreated hand mold in nitrile rubber latex at 30°C for 20 seconds, dry it, place it in clean water at 65°C, leach it for 35 minutes, then place it in a vulcanization furnace at 115°C, vulcanize it for 20 minutes, and post-treat it to obtain nitrile gloves.

[0070] Comparative Example 2: The antibacterial agent (silver ion antibacterial agent, model: Meiboss, MS-K001, average particle size: 5 nm) and the flame retardant (antimony trioxide) are directly added thereto, and the rest is the same as in Example 3, as follows:

[0071] Step 1: Add 350 parts of nitrile latex, 1.5 parts of sulfur, 21 parts of silicon dioxide, 5.5 parts of sodium dodecylbenzene sulfonate, 1.5 parts of titanium dioxide, 2.5 parts of sodium dibutylnaphthalene sulfonate, 5 parts of antibacterial agent, 7 parts of flame retardant, and 110 parts of tetrahydrofuran into a disperser, stir for 1.5 hours at 30°C, and then pass through a 90-mesh sieve to obtain nitrile latex;

[0072] Step 2: The hand mold is immersed in an acid tank for cleaning, and after drying, immersed in a calcium salt solution for 15 seconds, and then dried at 70° C. for 1.5 minutes to obtain a pretreated hand mold;

[0073] Step 3: Immerse the pretreated hand mold in nitrile rubber latex at 30°C for 20 seconds, dry it, place it in clean water at 65°C, leach it for 35 minutes, then place it in a vulcanization furnace at 115°C, vulcanize it for 20 minutes, and post-treat it to obtain nitrile gloves.

[0074] Testing experiment: (1) The friction resistance of the nitrile gloves obtained in the embodiment and the comparative example was measured according to the provisions of GB24541; (2) The flame retardant properties of the nitrile gloves obtained in the embodiment and the comparative example were tested by vertical burning test (ASTMD-6413); (3) The minimum inhibitory concentration (MIC) of Gram-negative bacteria in the nitrile gloves obtained in the embodiment and the comparative example was tested; the obtained data are shown in the following table:

[0075]

[0076] Table 1

[0077] Conclusion: The present invention significantly improves the wear resistance, flame retardant properties and antibacterial properties of nitrile gloves through the preparation and application of modified silica. Experimental data show that the wear resistance of nitrile gloves in Examples 1 to 3 is significantly higher than that in Comparative Examples 1 and 2, among which Example 3 has the best wear resistance, reaching 15180rad, while the wear resistance of Comparative Example 1 with unmodified silica is only 13124rad, and the wear resistance of Comparative Example 2 with direct addition of antibacterial agent and flame retardant is even lower, which is 12144rad. In terms of flame retardant properties, Examples 1 to 3 all reach Level 3, while Comparative Examples 1 and 2 are Level 1 and Level 2, respectively, indicating that the addition of modified silica effectively improves the flame retardant properties of gloves. In the antibacterial performance test, the minimum inhibitory concentration (MIC) values ​​of Examples 1 to 3 were 782, 789 and 756μg / mL, respectively, which are much lower than 981 and 866μg / mL of Comparative Examples 1 and 2, indicating that modified silica can significantly improve the antibacterial properties of gloves.

[0078] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] The above contents are merely examples and explanations of the present invention. Those skilled in the art 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 invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A method for preparing wear-resistant nitrile gloves, characterized in that: The following steps are involved: Step 1: Add nitrile latex, sulfur, modified silica, sodium dodecylbenzene sulfonate, titanium dioxide, sodium dibutylnaphthalene sulfonate, and tetrahydrofuran into a disperser, stir for 1-2 hours at 25-35° C., and then pass through an 80-100 mesh sieve to obtain nitrile latex; Step 2: Immerse the hand mold in an acid tank for cleaning, dry it, immerse it in a calcium salt solution for 10-20 seconds, and then dry it at 60-80°C for 1-2 minutes to obtain a pretreated hand mold; Step 3: Immerse the pretreated hand mold in nitrile rubber latex at 25-35°C for 10-30s, dry it, place it in clean water at 60-70°C, leach it for 30-40min, then place it in a vulcanization furnace at 100-130°C, vulcanize it for 10-30min, and post-treat it to obtain nitrile gloves.

2. The method for preparing a wear-resistant nitrile glove according to claim 1, characterized in that: The nitrile rubber latex comprises the following components: by weight, 300-400 parts of nitrile rubber latex, 1-2 parts of sulfur, 20-22 parts of modified silicon dioxide, 5-6 parts of sodium dodecylbenzene sulfonate, 1-2 parts of titanium dioxide, 2-3 parts of sodium dibutylnaphthalene sulfonate, and 100-120 parts of tetrahydrofuran.

3. The method for preparing a wear-resistant nitrile glove according to claim 1, characterized in that: The preparation process of the modified silicon dioxide: S1: Add 3-bromomethylbenzoic acid, 3-amino-5-hydroxy-1-pentene and N,N'-dicyclohexylcarbodiimide to dichloromethane, stir evenly, heat to 70-80°C, react for 3-4h, cool to room temperature, remove the solvent by rotary evaporation, transfer to acetonitrile after purification, add triphenylphosphine, react at 80-90°C for 20-22h, remove the solvent by vacuum distillation to obtain reaction intermediate A; S2: Mix reaction intermediate A, o-methoxyphenol, anhydrous ethanol and concentrated sulfuric acid, heat to 40-50°C, react for 15-18h, filter out the solid after the reaction, wash with water until neutral, and then recrystallize with ethanol to obtain reaction intermediate B; S3: Mix the reaction intermediate B, triethylamine and ethyl acetate, perform ultrasonic treatment for 20-30 min, add phenylphosphoryl dichloride solution, raise the temperature to 70-80° C. under protective atmosphere, react for 20-22 h, filter, wash and dry to obtain a modifier; S4: Under a protective atmosphere, add thiolated silica to ethanol, ultrasonically disperse for 30-40 minutes, then add a modifier and azobisisobutyronitrile, raise the temperature to 90-95°C, react for 3-4 hours, cool to room temperature, filter, wash, and dry to obtain modified silica.

4. The method for preparing a wear-resistant nitrile glove according to claim 3, characterized in that: The raw materials of the reaction intermediate A include the following substances: by weight, 10-12 parts of 3-bromomethylbenzoic acid, 5-6 parts of 3-amino-5-hydroxy-1-pentene, 0.1-0.2 parts of N,N'-dicyclohexylcarbodiimide, 80-100 parts of dichloromethane, 150-180 parts of acetonitrile, and 15-18 parts of triphenylphosphine.

5. The method for preparing a wear-resistant nitrile glove according to claim 3, characterized in that: The raw material of the reaction intermediate B comprises the following components: by weight, 10-12 parts of the reaction intermediate A, 3-4 parts of o-methoxyphenol, 60-70 parts of anhydrous ethanol, and 0.3-0.4 parts of concentrated sulfuric acid.

6. The method for preparing a wear-resistant nitrile glove according to claim 3, characterized in that: The modifier raw material comprises the following components: by weight, 15-18 parts of reaction intermediate B, 0.1-0.2 parts of triethylamine, 80-100 parts of ethyl acetate, and 8-10 parts of phenylphosphoryl dichloride solution.

7. The method for preparing a wear-resistant nitrile glove according to claim 3, characterized in that: The modified silicon dioxide comprises the following components: by weight, 10-12 parts of mercapto silicon dioxide, 100-110 parts of ethanol, 5-8 parts of a modifier, and 0.1-0.2 parts of azobisisobutyronitrile.

8. The method for preparing a wear-resistant nitrile glove according to claim 3, characterized in that: The preparation process of the mercapto silicon dioxide is as follows: under a protective atmosphere, silicon dioxide is dispersed in ethanol, a mixed solution of 3-mercaptopropyltrimethoxysilane and methanol is added, the temperature is raised to 60-70° C., stirring for reaction for 20-30 minutes, then ammonia water is added, the reaction is continued for 4-5 hours, the mercapto silicon dioxide is cooled to room temperature, filtered, washed, and dried to obtain mercapto silicon dioxide.

9. The method for preparing a wear-resistant nitrile glove according to claim 8, characterized in that: The mercaptolated silicon dioxide raw material comprises the following components: by weight, 1-2 parts of silicon dioxide, 300-350 parts of ethanol, 1-2 parts of 3-mercaptopropyltrimethoxysilane, 80-100 parts of methanol, and 0.4-0.8 parts of ammonia water.

10. The nitrile gloves obtained according to the method for preparing wear-resistant nitrile gloves according to any one of claims 1 to 9.

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