Antistatic PVC glove and preparation method thereof

Abstract

The invention discloses an antistatic PVC glove and a preparation method thereof. Comprising the following steps: step 1, mixing PVC paste resin, modified polyurethane, dioctyl phthalate, trimethylolpropane triacrylate, calcium stearate and modified carbon black, uniformly stirring, standing and defoaming to obtain uniform PVC slurry; step 2, preheating the cleaned hand mold, then transferring the hand mold into PVC slurry, and carrying out preliminary gelation to form an impregnated hand mold; and 3, putting the impregnated hand mold into an oven, baking, cooling, demolding, and carrying out post-treatment to finally obtain the antistatic PVC glove. The antistatic wear-resistant PVC material has the beneficial effects that the quaternized imidazolium salt is introduced into a polyurethane chain segment to modify PVC, so that the antistatic property and wear resistance of the material are remarkably improved. Meanwhile, the quaternized imidazolium salt is used for modifying the carbon black, so that the antistatic capability and the physical property of the material are further enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of glove manufacturing, and specifically, relates to an antistatic PVC glove and a preparation method thereof. Background Art

[0002] With the increasing demand for protective gloves in the industrial and medical fields, PVC gloves are widely used due to their low cost, good flexibility, and chemical corrosion resistance. However, traditional PVC gloves have a significant defect in practical applications: the problem of static electricity accumulation. Since the PVC material itself has a high surface resistance and is prone to generating static electricity, this not only causes dust adsorption and affects the cleanliness of the operating environment, but may also pose safety hazards in flammable and explosive occasions. Therefore, developing antistatic PVC gloves has become a technical problem that urgently needs to be solved.

[0003] Currently, the market demand for antistatic PVC gloves is mainly achieved by adding conductive fillers (such as carbon black) or surface coating treatment. However, these methods have certain limitations: on the one hand, unmodified conductive fillers (such as ordinary carbon black) are prone to agglomeration and poor dispersibility, resulting in discontinuous conductive networks and unstable antistatic performance; on the other hand, although surface coating treatment can reduce the surface resistance to a certain extent, its durability is poor and it is prone to failure due to friction or cleaning during use. In addition, existing technologies often neglect the balance between antistatic performance and other physical properties (such as softness and abrasion resistance), resulting in the sacrifice of other key properties while improving the antistatic ability of the gloves.

[0004] Therefore, to solve the above problems, the present invention prepares an antistatic PVC glove. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an antistatic PVC glove and a preparation method thereof.

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

[0007] A preparation method of an antistatic PVC glove, comprising the following steps:

[0008] Step 1: Mix PVC paste resin, modified polyurethane, dioctyl phthalate, trimethylolpropane triacrylate, calcium stearate, and modified carbon black and stir evenly. After standing for defoaming, a uniform PVC slurry is obtained;

[0009] Step 2: Preheat the cleaned hand mold at 80 - 90 °C for 5 - 8 min, and then transfer it to the PVC slurry. Perform preliminary gelation at 60 - 80 °C to form an impregnated hand mold;

[0010] Step 3: Put the impregnated hand mold into an oven, bake it at 150 - 200 °C for 4 - 5 min, demold after cooling and conduct post - treatment to finally obtain antistatic PVC gloves.

[0011] More preferably, the PVC paste includes the following components: by weight, 60 - 70 parts of PVC paste resin, 8 - 10 parts of modified polyurethane, 30 - 32 parts of dioctyl phthalate, 8 - 10 parts of trimethylolpropane triacrylate, 1 - 2 parts of calcium stearate, and 2 - 3 parts of modified carbon black.

[0012] More preferably, the preparation process of the modified polyurethane is as follows:

[0013] S1: Dissolve N-(2 - methoxyethyl)but - 3 - en - 1 - amine and 1,3 - dibromopropane in N,N - dimethylformamide, heat to 60 - 70 °C and react for 4 - 5 h, cool to room temperature, and remove the excess 1,3 - dibromopropane by vacuum distillation to obtain N,N - disubstituted enamine;

[0014] S2: Mix N,N - disubstituted enamine, methylimidazole and dichloromethane, react in an ice - water bath under a protective atmosphere for 20 - 22 h, then heat to 30 - 40 °C and react for 12 - 15 h, conduct vacuum distillation, washing and drying to obtain alkylated imidazolium salt; then add it together with epichlorohydrin to deionized water, react at 40 - 50 °C for 3 - 4 h to obtain diol quaternized imidazolium salt;

[0015] S3: Mix polyether polyol, isophorone diisocyanate, and plasticizer, stir evenly, heat to 85 - 90 °C, add dibutyltin dilaurate, and react for 3 - 4 h to obtain a prepolymer; mix the prepolymer, diol quaternized imidazolium salt, diphenylmethane diisocyanate, dibutyltin dilaurate, and hydroquinone, heat to 80 - 85 °C, react for 3 - 4 h, cool to 40 - 50 °C, add trimethylolpropane, and conduct chain extension for 20 - 30 min, then cool and conduct post - treatment to obtain modified polyurethane.

[0016] More preferably, the N,N - disubstituted enamine raw material includes the following components: by weight, 10 - 12 parts of N-(2 - methoxyethyl)but - 3 - en - 1 - amine, 15 - 20 parts of 1,3 - dibromopropane, and 100 - 120 parts of N,N - dimethylformamide.

[0017] More preferably, the diol quaternized imidazolium salt raw material includes the following components: by weight, 10 - 12 parts of N,N - disubstituted enamine, 3 - 4 parts of methylimidazole, 60 - 70 parts of dichloromethane, 10 - 12 parts of epichlorohydrin, and 80 - 100 parts of deionized water.

[0018] Preferably, the prepolymer comprises the following components: 30-40 parts by weight of polyether polyol, 16-18 parts by weight of isophorone diisocyanate, 10-12 parts by weight of plasticizer, 24-25 parts by weight of dibutyltin dilaurate; the modified polyurethane comprises the following components: 12-15 parts by weight of prepolymer, 20-22 parts by weight of glycol quaternized imidazole salt, 30-35 parts by weight of diphenylmethane diisocyanate, 0.1-0.2 parts by weight of dibutyltin dilaurate, 0.2-0.3 parts by weight of hydroquinone, 1-2 parts by weight of trimethylolpropane.

[0019] Preferably, the preparation process of the modified carbon black is as follows: mix oxidized carbon black, diphenylmethane diisocyanate, triethylamine, and toluene, react in an ice bath for 25-35 min, then slowly heat to 110-130 °C and continue to react for 20-30 min to obtain isocyanated carbon black; then mix it with glycol quaternized imidazole salt, hydroquinone, dibutyltin dilaurate, and toluene diisocyanate, and react at 60-70 °C for 2-3 h to obtain modified carbon black.

[0020] Preferably, the raw materials of the modified carbon black comprise the following components: 10-12 parts by weight of oxidized carbon black, 40-50 parts by weight of diphenylmethane diisocyanate, 3-4 parts by weight of triethylamine, 100-120 parts by weight of toluene, 30-35 parts by weight of glycol quaternized imidazole salt, 1-2 parts by weight of hydroquinone, 0.1-0.2 parts by weight of dibutyltin dilaurate, 15-20 parts by weight of toluene diisocyanate.

[0021] Advantages of the present invention:

[0022] In the present invention, by introducing quaternized imidazole salt into the polyurethane chain segment to modify PVC, the antistatic performance and wear resistance of the material are significantly improved. At the same time, using quaternized imidazole salt to modify carbon black further enhances the antistatic ability and physical properties of the material. Specifically as follows:

[0023] Firstly: In the solution, a quaternized imidazole salt with an olefin group is chemically synthesized and introduced into the polyurethane chain segment to modify PVC. The quaternized imidazole salt has excellent ionic conductivity, can significantly reduce the surface resistance of the material, and reduce static electricity accumulation. At the same time, its molecular structure contains an olefin group, which can bind well with PVC and enhance compatibility. In addition, the polyurethane chain segment itself has excellent wear resistance and flexibility, further improving the overall mechanical properties of the material;

[0024] Second: In the solution, in order to further improve the antistatic performance of the material, a conductive path is constructed by introducing carbon black, thereby effectively reducing the surface resistance. At the same time, the surface of the carbon black is pre-modified to improve its dispersibility in the matrix and form a uniform conductive network. The modified carbon black can synergistically act with the modified polyurethane to further optimize the overall antistatic performance of the material. Detailed implementation mode

[0025] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0026] Embodiment 1: A preparation method of an antistatic PVC glove includes the following steps:

[0027] Step 1: Mix 60 parts of PVC paste resin, 8 parts of modified polyurethane, 30 parts of dioctyl phthalate, 8 parts of trimethylolpropane triacrylate, 1 part of calcium stearate, and 2 parts of modified carbon black and stir evenly. After standing for defoaming, a uniform PVC slurry is obtained;

[0028] Step 2: Preheat the cleaned hand mold at 80 °C for 5 minutes, and then transfer it to the PVC slurry. Gelatinize it preliminarily at 60 °C to form an impregnated hand mold;

[0029] Step 3: Put the impregnated hand mold into an oven and bake it at 150 °C for 4 minutes. After cooling, demold it and perform post-treatment to finally obtain an antistatic PVC glove;

[0030] Among them, the preparation process of the modified polyurethane is as follows:

[0031] S1: Dissolve 10 parts of N-(2-methoxyethyl)but-3-en-1-amine and 15 parts of 1,3-dibromopropane in 100 parts of N,N-dimethylformamide, heat to 60 °C and react for 4 hours. Cool to room temperature and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0032] S2: Mix 10 parts of N,N-disubstituted enamine, 3 parts of methylimidazole and 60 parts of dichloromethane, react in an ice-water bath under nitrogen for 20 hours, then heat to 30 °C and react for 12 hours. After vacuum distillation, washing and drying, an alkylated imidazolium salt is obtained; Subsequently, add it together with 10 parts of epichlorohydrin to 80 parts of deionized water and react at 40 °C for 3 hours to obtain a glycol quaternized imidazolium salt;

[0033] S3: Mix 30 parts of polyether polyol, 16 parts of isophorone diisocyanate, and 10 parts of plasticizer. After stirring evenly, heat up to 85 °C, add 24 parts of dibutyltin dilaurate, and react for 3 h to obtain a prepolymer; Mix 12 parts of the prepolymer, 20 parts of diol quaternized imidazole salt, 30 parts of diphenylmethane diisocyanate, 0.1 part of dibutyltin dilaurate, and 0.2 part of hydroquinone. Heat up to 80 °C, react for 3 h, cool down to 40 °C, add 1 part of trimethylolpropane, extend the chain for 20 min, cool, and perform post-treatment to obtain modified polyurethane;

[0034] The preparation process of modified carbon black is as follows: Mix 10 parts of oxidized carbon black, 40 parts of diphenylmethane diisocyanate, 3 parts of triethylamine, and 100 parts of toluene. React under ice bath for 25 min, then slowly heat to 110 °C and continue to react for 20 min to obtain isocyanated carbon black; Then mix it with 30 parts of diol quaternized imidazole salt, 1 part of hydroquinone, 0.1 part of dibutyltin dilaurate, and 15 parts of toluene diisocyanate, and react at 60 °C for 2 h to obtain modified carbon black.

[0035] Example 2: A preparation method of antistatic PVC gloves, comprising the following steps:

[0036] Step 1: Mix 70 parts of PVC paste resin, 10 parts of modified polyurethane, 32 parts of dioctyl phthalate, 10 parts of trimethylolpropane triacrylate, 2 parts of calcium stearate, and 3 parts of modified carbon black and stir evenly. After standing for defoaming, obtain a uniform PVC slurry;

[0037] Step 2: Preheat the cleaned hand mold at 90 °C for 8 minutes, then transfer it to the PVC slurry and preliminarily gel at 80 °C to form an impregnated hand mold;

[0038] Step 3: Put the impregnated hand mold into an oven, bake at 200 °C for 5 minutes, cool, demold, and perform post-treatment to finally obtain antistatic PVC gloves;

[0039] Among them, the preparation process of modified polyurethane is as follows:

[0040] S1: Dissolve 12 parts of N-(2-methoxyethyl)but-3-en-1-amine and 20 parts of 1,3-dibromopropane in 120 parts of N,N-dimethylformamide, heat to 70 °C and react for 5 hours, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0041] S2: Mix 12 parts of N,N-disubstituted enamine, 4 parts of methylimidazole and 70 parts of dichloromethane, react in an ice-water bath under nitrogen protection for 22 hours, then raise the temperature to 40 °C and react for 15 hours. After vacuum distillation, washing and drying, an alkylated imidazolium salt is obtained; Add the alkylated imidazolium salt and 12 parts of epichlorohydrin to 100 parts of deionized water and react at 50 °C for 4 hours to obtain a diol quaternized imidazolium salt;

[0042] S3: Mix 40 parts of polyether polyol, 18 parts of isophorone diisocyanate and 12 parts of plasticizer, stir evenly, then raise the temperature to 90 °C, add 25 parts of dibutyltin dilaurate and react for 4 hours to obtain a prepolymer; Mix 15 parts of the prepolymer, 22 parts of the diol quaternized imidazolium salt, 35 parts of diphenylmethane diisocyanate, 0.2 parts of dibutyltin dilaurate and 0.3 parts of hydroquinone, raise the temperature to 85 °C and react for 4 hours, then cool to 50 °C, add 2 parts of trimethylolpropane, chain extend for 30 minutes, cool, and perform post-treatment to obtain a modified polyurethane;

[0043] The preparation process of the modified carbon black is as follows: Mix 12 parts of oxidized carbon black, 50 parts of diphenylmethane diisocyanate, 4 parts of triethylamine and 120 parts of toluene, react in an ice bath for 35 minutes, then slowly heat to 130 °C and continue to react for 30 minutes to obtain isocyanated carbon black; Mix the isocyanated carbon black with 35 parts of the diol quaternized imidazolium salt, 2 parts of hydroquinone, 0.2 parts of dibutyltin dilaurate and 20 parts of toluene diisocyanate, and react at 70 °C for 3 hours to obtain the modified carbon black.

[0044] Example 3: A preparation method of antistatic PVC gloves, comprising the following steps:

[0045] Step 1: Mix 65 parts of PVC paste resin, 9 parts of modified polyurethane, 31 parts of dioctyl phthalate, 9 parts of trimethylolpropane triacrylate, 1.5 parts of calcium stearate and 2.5 parts of modified carbon black and stir evenly. After standing and defoaming, a uniform PVC slurry is obtained;

[0046] Step 2: Preheat the cleaned hand mold at 85 °C for 6 min, then transfer it to the PVC slurry and preliminarily gel at 70 °C to form an impregnated hand mold;

[0047] Step 3: Put the impregnated hand mold into an oven, bake at 180 °C for 4.5 min, cool, demold and perform post-treatment to finally obtain antistatic PVC gloves;

[0048] Among them, the preparation process of the modified polyurethane is as follows:

[0049] S1: Dissolve 11 parts of N-(2-methoxyethyl)but-3-en-1-amine and 18 parts of 1,3-dibromopropane in 110 parts of N,N-dimethylformamide, heat to 65 °C and react for 4.5 h, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0050] S2: Mix 11 parts of N,N-disubstituted enamine, 3.5 parts of methylimidazole and 65 parts of dichloromethane, react in an ice bath under nitrogen for 21 h, then raise the temperature to 35 °C and react for 13 h. After vacuum distillation, washing and drying, an alkylated imidazolium salt is obtained; Subsequently, it is added to 90 parts of deionized water together with 11 parts of epichlorohydrin, and reacted at 45 °C for 3.5 h to obtain a diol quaternized imidazolium salt;

[0051] S3: Mix 35 parts of polyether polyol, 17 parts of isophorone diisocyanate and 11 parts of plasticizer, stir evenly, then raise the temperature to 85 °C, add 25 parts of dibutyltin dilaurate, and react for 3.5 h to obtain a prepolymer; Mix 13 parts of prepolymer, 21 parts of diol quaternized imidazolium salt, 32 parts of diphenylmethane diisocyanate, 0.2 part of dibutyltin dilaurate and 0.3 part of hydroquinone, raise the temperature to 85 °C, react for 4 h, cool to 50 °C, add 2 parts of trimethylolpropane, chain extend for 30 min, cool, and perform post-treatment to obtain a modified polyurethane;

[0052] The preparation process of modified carbon black is as follows: Mix 11 parts of oxidized carbon black, 45 parts of diphenylmethane diisocyanate, 3.5 parts of triethylamine and 110 parts of toluene, react in an ice bath for 30 min, then slowly heat to 120 °C and continue to react for 25 min to obtain isocyanated carbon black; Then mix it with 32 parts of diol quaternized imidazolium salt, 1.5 parts of hydroquinone, 0.15 part of dibutyltin dilaurate and 18 parts of toluene diisocyanate, and react at 65 °C for 2.5 h to obtain modified carbon black.

[0053] Comparative Example 1: Without adding the modified polyurethane, the rest is the same as in Example 3, specifically as follows:

[0054] Step 1: Mix 65 parts of PVC paste resin, 31 parts of dioctyl phthalate, 9 parts of trimethylolpropane triacrylate, 1.5 parts of calcium stearate and 2.5 parts of modified carbon black and stir evenly. After standing and defoaming, a uniform PVC slurry is obtained;

[0055] Step 2: Preheat the cleaned hand mold at 85 °C for 6 min, then transfer it to the PVC slurry, and perform preliminary gelation at 70 °C to form an impregnated hand mold;

[0056] Step 3: Put the impregnated hand mold into an oven, bake at 180 °C for 4.5 min, cool, demold and perform post-treatment to finally obtain an antistatic PVC glove;

[0057] Preparation process of glycol quaternary ammonium imidazole salt:

[0058] S1: Dissolve 11 parts of N-(2-methoxyethyl)but-3-en-1-amine and 18 parts of 1,3-dibromopropane in 110 parts of N,N-dimethylformamide, heat to 65 °C and react for 4.5 h, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0059] S2: Mix 11 parts of N,N-disubstituted enamine, 3.5 parts of methylimidazole and 65 parts of dichloromethane, react in an ice bath under nitrogen for 21 h, then raise the temperature to 35 °C and react for 13 h, and obtain alkylated imidazole salt through vacuum distillation, washing and drying; Subsequently, add it together with 11 parts of epichlorohydrin to 90 parts of deionized water, and react at 45 °C for 3.5 h to obtain glycol quaternary ammonium imidazole salt;

[0060] The preparation process of modified carbon black is as follows: Mix 11 parts of oxidized carbon black, 45 parts of diphenylmethane diisocyanate, 3.5 parts of triethylamine, and 110 parts of toluene, react in an ice bath for 30 min, then slowly heat to 120 °C and continue to react for 25 min to obtain isocyanated carbon black; Then mix it with 32 parts of glycol quaternary ammonium imidazole salt, 1.5 parts of hydroquinone, 0.15 parts of dibutyl dilaurate, and 18 parts of toluene diisocyanate, and react at 65 °C for 2.5 h to obtain modified carbon black.

[0061] Comparative Example 2: The carbon black is not modified, and the rest is the same as in Example 3, specifically as follows:

[0062] Step 1: Mix 65 parts of PVC paste resin, 9 parts of modified polyurethane, 31 parts of dioctyl phthalate, 9 parts of trimethylolpropane triacrylate, 1.5 parts of calcium stearate, and 2.5 parts of carbon black and stir evenly. After standing and defoaming, a uniform PVC slurry is obtained;

[0063] Step 2: Preheat the cleaned hand mold at 85 °C for 6 min, then transfer it to the PVC slurry, and preliminarily gel at 70 °C to form an impregnated hand mold;

[0064] Step 3: Put the impregnated hand mold into an oven, bake at 180 °C for 4.5 min, cool and demold and carry out post-treatment to finally obtain antistatic PVC gloves;

[0065] Among them, the preparation process of modified polyurethane is as follows:

[0066] S1: Dissolve 11 parts of N-(2-methoxyethyl)but-3-en-1-amine and 18 parts of 1,3-dibromopropane in 110 parts of N,N-dimethylformamide, heat to 65 °C and react for 4.5 h, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0067] S2: Mix 11 parts of N,N-disubstituted enamine, 3.5 parts of methylimidazole and 65 parts of dichloromethane, react in an ice-water bath under nitrogen for 21 h, then raise the temperature to 35 °C and react for 13 h. After vacuum distillation, washing and drying, an alkylated imidazolium salt is obtained; Subsequently, add it together with 11 parts of epichlorohydrin to 90 parts of deionized water and react at 45 °C for 3.5 h to obtain a diol quaternized imidazolium salt;

[0068] S3: Mix 35 parts of polyether polyol, 17 parts of isophorone diisocyanate and 11 parts of plasticizer, stir evenly, then raise the temperature to 85 °C, add 25 parts of dibutyltin dilaurate and react for 3.5 h to obtain a prepolymer; Mix 13 parts of prepolymer, 21 parts of diol quaternized imidazolium salt, 32 parts of diphenylmethane diisocyanate, 0.2 parts of dibutyltin dilaurate and 0.3 parts of hydroquinone, raise the temperature to 85 °C, react for 4 h, cool to 50 °C, add 2 parts of trimethylolpropane, chain extend for 30 min, cool, and perform post-treatment to obtain a modified polyurethane.

[0069] Comparative Example 3: The diol quaternized imidazolium salt is not used as a segment of the polyurethane, and the rest is the same as in Example 3, specifically as follows:

[0070] Step 1: Mix 65 parts of PVC paste resin, 9 parts of modified polyurethane, 31 parts of dioctyl phthalate, 9 parts of trimethylolpropane triacrylate, 1.5 parts of calcium stearate and 2.5 parts of modified carbon black and stir evenly. After standing and defoaming, a uniform PVC slurry is obtained;

[0071] Step 2: Preheat the cleaned hand mold at 85 °C for 6 min, then transfer it to the PVC slurry and preliminarily gel at 70 °C to form an impregnated hand mold;

[0072] Step 3: Put the impregnated hand mold into an oven, bake at 180 °C for 4.5 min, cool, demold and perform post-treatment to finally obtain an antistatic PVC glove;

[0073] Among them, the preparation process of the modified polyurethane is as follows:

[0074] Mix 35 parts of polyether polyol, 17 parts of isophorone diisocyanate, and 11 parts of plasticizer. After stirring evenly, heat up to 85 °C, add 25 parts of dibutyltin dilaurate, and react for 3.5 h to obtain a prepolymer; mix 13 parts of the prepolymer, 15 parts of 1,4-butanediol, 32 parts of diphenylmethane diisocyanate, 0.2 part of dibutyltin dilaurate, and 0.3 part of hydroquinone, heat up to 85 °C, react for 4 h, cool down to 50 °C, add 2 parts of trimethylolpropane, chain extend for 30 min, cool, and perform post-treatment to obtain modified polyurethane;

[0075] The preparation process of the diol quaternized imidazole salt is as follows:

[0076] S1: Dissolve 11 parts of N-(2-methoxyethyl)but-3-en-1-amine and 18 parts of 1,3-dibromopropane in 110 parts of N,N-dimethylformamide, heat to 65 °C and react for 4.5 h, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine;

[0077] S2: Mix 11 parts of N,N-disubstituted enamine, 3.5 parts of methylimidazole, and 65 parts of dichloromethane, react in an ice bath under nitrogen for 21 h, then heat up to 35 °C and react for 13 h, perform vacuum distillation, washing, and drying to obtain an alkylated imidazole salt; subsequently, add it together with 11 parts of epichlorohydrin to 90 parts of deionized water, and react at 45 °C for 3.5 h to obtain the diol quaternized imidazole salt;

[0078] The preparation process of the modified carbon black is as follows: Mix 11 parts of oxidized carbon black, 45 parts of diphenylmethane diisocyanate, 3.5 parts of triethylamine, and 110 parts of toluene, react in an ice bath for 30 min, then slowly heat to 120 °C and continue to react for 25 min to obtain isocyanated carbon black; then mix it with 32 parts of the diol quaternized imidazole salt, 1.5 parts of hydroquinone, 0.15 part of dibutyltin dilaurate, and 18 parts of toluene diisocyanate, and react at 65 °C for 2.5 h to obtain the modified carbon black.

[0079] Detection test: (1) Test the tensile strength and elongation of the products obtained in the examples and comparative examples on a DXLL-50000 type electronic tensile testing machine according to GB / T528-2009, and the tensile rate is 500 mm / min; (2) Cut out 10 cm 2 of the test samples at 3 different points on the products obtained in the examples and comparative examples, group them, rinse them clean and dry them; before testing, wipe the surface of the samples with a soft cloth, place them on an insulating board, place the electrodes of the megohmmeter, and record the results after the readings are stable. All samples are tested in the same environment); the data obtained are shown in the following table:

[0080]

[0081] Table 1

[0082] Conclusion: By introducing quaternized imidazole salt into the polyurethane segment, the PVC was modified in the examples, significantly improving the antistatic performance and wear resistance of the material. At the same time, the carbon black was modified with quaternized imidazole salt, further enhancing the antistatic ability and physical properties of the material. The surface resistance of Comparative Example 1 (without adding modified polyurethane) increased significantly, and both the elongation at break and the tensile strength decreased greatly, indicating that the modified polyurethane is one of the core factors for improving the antistatic performance and mechanical properties; the surface resistance of Comparative Example 2 (unmodified carbon black) was relatively high, and both the elongation at break and the tensile strength were lower than those of the examples, showing that the modified carbon black plays an irreplaceable role in forming a uniform conductive network, optimizing the dispersibility, and improving the comprehensive performance; the surface resistance of Comparative Example 3 (the glycol quaternary ammonium imidazole salt was not used as a segment) was relatively high, and both the elongation at break and the tensile strength were lower than those of the examples, indicating that when the glycol quaternary ammonium imidazole salt is used as a polyurethane segment, its ionic conductivity and strengthening effect can be more effectively exerted.

[0083] In the description of the specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0084] The above content is only an example and illustration of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the invention or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of the present invention.

Claims

1. A preparation method of an antistatic PVC glove, characterized in that: It includes the following steps: Step 1: Mix PVC paste resin, modified polyurethane, dioctyl phthalate, trimethylolpropane triacrylate, calcium stearate, and modified carbon black evenly, and after standing for defoaming, obtain a uniform PVC slurry; Step 2: Preheat the cleaned hand mold at 80 - 90 °C for 5 - 8 min, then transfer it to the PVC slurry, and preliminarily gel at 60 - 80 °C to form an impregnated hand mold; Step 3: Put the impregnated hand mold into an oven, bake it at 150 - 200 °C for 4 - 5 min, demold after cooling and perform post-treatment to finally obtain antistatic PVC gloves.

2. The preparation method of an antistatic PVC glove according to claim 1, characterized in that: The PVC slurry includes the following components: by weight, 60 - 70 parts of PVC paste resin, 8 - 10 parts of modified polyurethane, 30 - 32 parts of dioctyl phthalate, 8 - 10 parts of trimethylolpropane triacrylate, 1 - 2 parts of calcium stearate, and 2 - 3 parts of modified carbon black.

3. The preparation method of an antistatic PVC glove according to claim 1, wherein: The preparation process of the modified polyurethane is as follows: S1: Dissolve N-(2-methoxyethyl)but-3-en-1-amine and 1,3-dibromopropane in N,N-dimethylformamide, heat to 60 - 70 °C and react for 4 - 5 h, cool to room temperature, and remove the excess 1,3-dibromopropane by vacuum distillation to obtain N,N-disubstituted enamine; S2: Mix N,N-disubstituted enamine, methylimidazole, and dichloromethane, react in an ice-water bath under a protective atmosphere for 20 - 22 h, then raise the temperature to 30 - 40 °C and react for 12 - 15 h. After vacuum distillation, washing, and drying, obtain alkylated imidazolium salt; then add it together with epichlorohydrin to deionized water and react at 40 - 50 °C for 3 - 4 h to obtain diol quaternized imidazolium salt; S3: Mix polyether polyol, isophorone diisocyanate, and plasticizer evenly, raise the temperature to 85 - 90 °C, add dibutyltin dilaurate, and react for 3 - 4 h to obtain a prepolymer; mix the prepolymer, diol quaternized imidazolium salt, diphenylmethane diisocyanate, dibutyltin dilaurate, and hydroquinone, raise the temperature to 80 - 85 °C, react for 3 - 4 h, cool to 40 - 50 °C, add trimethylolpropane, and carry out chain extension for 20 - 30 min, then cool and perform post-treatment to obtain modified polyurethane.

4. The preparation method of an antistatic PVC glove according to claim 3, wherein: The raw materials of the N,N-disubstituted enamine include the following components: by weight, 10 - 12 parts of N-(2-methoxyethyl)but-3-en-1-amine, 15 - 20 parts of 1,3-dibromopropane, and 100 - 120 parts of N,N-dimethylformamide.

5. The preparation method of an antistatic PVC glove according to claim 3, characterized in that: The raw materials of the diol quaternized imidazolium salt include the following components: by weight, 10 - 12 parts of N,N-disubstituted enamine, 3 - 4 parts of methylimidazole, 60 - 70 parts of dichloromethane, 10 - 12 parts of epichlorohydrin, and 80 - 100 parts of deionized water.

6. The preparation method of an antistatic PVC glove according to claim 3, characterized in that: The prepolymer comprises the following components: 30-40 parts by weight of polyether polyol, 16-18 parts by weight of isophorone diisocyanate, 10-12 parts by weight of plasticizer, 24-25 parts by weight of dibutyltin dilaurate; the modified polyurethane comprises the following components: 12-15 parts by weight of prepolymer, 20-22 parts by weight of glycol quaternized imidazole salt, 30-35 parts by weight of diphenylmethane diisocyanate, 0.1-0.2 parts by weight of dibutyltin dilaurate, 0.2-0.3 parts by weight of hydroquinone, 1-2 parts by weight of trimethylolpropane.

7. The preparation method of an antistatic PVC glove according to claim 1, characterized in that: The preparation process of the modified carbon black is as follows: Mix oxidized carbon black, diphenylmethane diisocyanate, triethylamine and toluene, react in an ice bath for 25-35 min, then slowly heat to 110-130 °C and continue to react for 20-30 min to obtain isocyanated carbon black; then mix it with glycol quaternized imidazole salt, hydroquinone, dibutyltin dilaurate and toluene diisocyanate, and react at 60-70 °C for 2-3 h to obtain modified carbon black.

8. The preparation method of an antistatic PVC glove according to claim 7, characterized in that: The raw materials of the modified carbon black include the following components: 10-12 parts by weight of oxidized carbon black, 40-50 parts by weight of diphenylmethane diisocyanate, 3-4 parts by weight of triethylamine, 100-120 parts by weight of toluene, 30-35 parts by weight of glycol quaternized imidazole salt, 1-2 parts by weight of hydroquinone, 0.1-0.2 parts by weight of dibutyltin dilaurate, 15-20 parts by weight of toluene diisocyanate.

9. The finished product obtained by the preparation method of an antistatic PVC glove according to any one of claims 1-8.

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