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CN-121991494-A - Matte wear-resistant glove and preparation method thereof

CN121991494ACN 121991494 ACN121991494 ACN 121991494ACN-121991494-A

Abstract

The invention belongs to the technical field of medical gloves, and relates to a matte wear-resistant glove and a preparation method thereof, wherein polyether glycol, diisocyanate, a catalyst, a chain extender and a cross-linking agent are mixed to obtain thermoplastic polyurethane; mixing thermoplastic polyurethane, SEBS, white oil, silicon dioxide and acrylic acid grafted SEBS, extruding and granulating to obtain TPU (thermoplastic polyurethane) foggy surface agent, mixing thermoplastic polyurethane, TPU foggy surface agent, wear-resisting agent, modified calcium carbonate, antioxidant and color master batch, extruding and granulating to obtain TPU composite particles, co-extruding and blow molding TPU and LDPE (low-density polyethylene) to obtain TPU film, cutting, heat-sealing and hot-cutting. According to the invention, the 4,4' -diphenyl ketone diisocyanate is introduced into the thermoplastic polyurethane chain segment, and the wear-resistant agent and the modified calcium carbonate are introduced into the raw materials for preparing the glove, so that the glove keeps good wear resistance, tensile property and ultraviolet ageing resistance, the wear resistance and tensile property of the glove are improved, the ultraviolet ageing is delayed, and the service life is prolonged.

Inventors

  • XU BIN

Assignees

  • 张家港瑞泰美弹性材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. The preparation method of the matte wear-resistant glove is characterized by comprising the following steps of: (1) Preparing thermoplastic polyurethane, namely mixing polyether glycol, diisocyanate and a catalyst for reaction, and then adding a chain extender and a cross-linking agent for continuous reaction to obtain the thermoplastic polyurethane; (2) Preparing TPU (thermoplastic polyurethane) aerosol, mixing the thermoplastic polyurethane, the SEBS, the white oil, the silicon dioxide and the acrylic acid grafted SEBS in the step (1), and extruding and granulating to obtain the TPU aerosol; (3) Preparing TPU composite particles, namely mixing the thermoplastic polyurethane in the step (1), the TPU matte agent in the step (2), an antiwear agent, modified calcium carbonate, an antioxidant and a color master batch, and extruding and granulating to obtain TPU composite particles; The preparation method of the wear-resistant agent comprises the following steps: s1, mixing iodine, triphenylphosphine, methylene dichloride, phenol, 2-trifluoromethyl benzoic acid and triethylamine at the temperature of 0 ℃, and then heating to room temperature for reaction for 30-60min; S2, mixing the intermediate, 4- (trimethylsilane) phenylboronic acid, [ Pd (IPr) (cin) Cl ], potassium phosphate and a solvent, and then reacting for 2-5 hours at 80-90 ℃ and purifying to obtain the wear-resistant agent; (4) The preparation method of the matte wear-resistant glove comprises the steps of respectively plasticizing TPU composite particles and LDPE, performing coextrusion and blow molding to obtain a TPU/LDPE double-layer film, peeling off the LDPE layer to obtain a TPU film, and cutting, heat-sealing and hot-cutting the TPU film to obtain the finished product.
  2. 2. The preparation method according to claim 1, wherein in the step S1, the dosage ratio of iodine, triphenylphosphine, methylene chloride, phenol, 2-trifluoromethylbenzoic acid and triethylamine is 15-20 mmol/30 mL/11-13 mmol/10 mmol/30-40 mmol.
  3. 3. The preparation method of claim 1, wherein in the step S2, the intermediate, 4- (trimethylsilane) phenylboronic acid, [ Pd (IPr) (cin) Cl ], potassium phosphate and solvent are used in a volume ratio of 2mmol to 3.5-5mmol to 0.06-0.12mmol to 3-4mmol to 3mL, and the solvent is obtained by mixing tetrahydrofuran and deionized water in a volume ratio of 1:1.
  4. 4. The preparation method of the modified calcium carbonate according to claim 1, wherein in the step (3), the preparation method of the modified calcium carbonate comprises the following steps of (a) dispersing calcium carbonate in deionized water, uniformly stirring, heating to 80-90 ℃ to obtain calcium carbonate slurry, (b) adding 4,4' -bis- (2-carboxyvinyl) -diphenyl ether and sodium stearate into the deionized water, stirring at 90-100 ℃ to dissolve to obtain a modifier, and (C) adding the modifier into the calcium carbonate slurry, reacting at 90-100 ℃ for 30-50min, centrifuging and drying to obtain the modified calcium carbonate.
  5. 5. The preparation method according to claim 4, wherein in the step (a), the mass ratio of calcium carbonate to deionized water is 1:10, in the step (b), the mass ratio of 4,4' -bis- (2-carboxyvinyl) -diphenyl ether, sodium stearate and deionized water is (0.3-0.5): (0.5-0.9): 50, and in the step (c), the mass ratio of calcium carbonate in the calcium carbonate slurry to sodium stearate in the modifier is (9-10): (0.5-0.9).
  6. 6. The preparation method according to claim 1, wherein in the step (1), the mass ratio of polyether glycol, diisocyanate, catalyst, chain extender and crosslinking agent is (10-16): 50-55): 3-5): 10-20): 3-5, the condition of the mixing reaction is 60-85 ℃ for 1-2h, and the condition of the continuous reaction is 40-60 ℃ for 6-10h; In the step (2), the mass ratio of thermoplastic polyurethane to SEBS to white oil to silicon dioxide to acrylic acid grafted SEBS is (50-60)/(10-15)/(15-20)/(10-15)/(8-12), and the extrusion temperature is 160-190 ℃.
  7. 7. The preparation method according to claim 1, wherein in the step (3), the mass ratio of the thermoplastic polyurethane, the TPU matte agent, the wear-resistant agent, the modified calcium carbonate, the antioxidant and the color master is (60-70): (10-20): (5-8): (5-10): (1-3): (3-5), and the extrusion temperature is 160-190 ℃.
  8. 8. The preparation method of claim 1, wherein in the step (1), the polyether glycol is polytetrahydrofuran ether glycol, the diisocyanate is 4,4' -benzophenone diisocyanate, the catalyst is dibutyltin dilaurate, the chain extender is ethylenediamine, the crosslinking agent is 2-hydroxy-1, 3, 5-benzene tricarbonyl alcohol, the antioxidant in the step (3) is antioxidant 1010, and the color master is permanent yellow GG.
  9. 9. The process according to claim 1, wherein in step (4) the plasticizing temperature of the TPU is 150-180 ℃, the plasticizing temperature of the LDPE is 180-220 ℃ and the temperature of the coextrusion is 200-205 ℃.
  10. 10. A matte wear resistant glove prepared according to the method of any one of claims 1-9.

Description

Matte wear-resistant glove and preparation method thereof Technical Field The invention belongs to the technical field of medical gloves, and particularly relates to a matte wear-resistant glove and a preparation method thereof. Background Medical gloves have undergone an evolution from natural latex to synthetic materials as their mainstream materials have entered the clinic since the beginning of the twentieth century. Although the latex has soft hand feeling, the natural protein contained therein causes long-term allergy trouble, the nitrile rubber has excellent oil resistance but has defects in elasticity and price stability, and the polyvinyl chloride has low cost, but the potential migration risk of phthalate plasticizers is worry. Polyurethane system enters the medical field by virtue of the advantages of artificial synthesis and designable structure, and is rapidly popularized in short-time operation scenes such as examination, dentistry, cosmetology and the like. At present, polyurethane gloves are gradually replacing the traditional nitrile gloves and latex gloves in the application in the medical field by virtue of the advantages of air permeability, antiallergic property, chemical resistance and the like. However, with the expansion of the clinical application range, polyurethane gloves face more complex mechanical environments, such as repeated grasping in emergency transport, instrument friction in surgical assistance, and wet heat aging in sterilization cycles, which all place higher demands on their surface integrity and gripping stability. Meanwhile, the surface of the polyurethane glove is too smooth, the friction coefficient is sharply reduced when contacting blood, normal saline or disinfection gel, so that the metal instrument is easy to slip, and the operation risk is increased. Thus, there is still a need for further research into polyurethane gloves. Disclosure of Invention A first object of the present invention is to provide a matte wear resistant glove. The second aim of the invention is to provide a preparation method of the matte wear-resistant glove. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the invention provides a preparation method of a matte wear-resistant glove, which comprises the following steps: (1) Preparing thermoplastic polyurethane, namely mixing polyether glycol, diisocyanate and a catalyst for reaction, and then adding a chain extender and a cross-linking agent for continuous reaction to obtain the thermoplastic polyurethane; (2) Preparing TPU (thermoplastic polyurethane) aerosol, mixing the thermoplastic polyurethane, the SEBS, the white oil, the silicon dioxide and the acrylic acid grafted SEBS in the step (1), and extruding and granulating to obtain the TPU aerosol; (3) Preparing TPU composite particles, namely mixing the thermoplastic polyurethane in the step (1), the TPU matte agent in the step (2), an antiwear agent, modified calcium carbonate, an antioxidant and a color master batch, and extruding and granulating to obtain TPU composite particles; in the step (3), the preparation method of the wear-resistant agent comprises the following steps: s1, mixing iodine, triphenylphosphine, methylene dichloride, phenol, 2-trifluoromethyl benzoic acid and triethylamine at the temperature of 0 ℃, and then heating to room temperature for reaction for 30-60min; S2, mixing the intermediate, 4- (trimethylsilane) phenylboronic acid, [ Pd (IPr) (cin) Cl ], potassium phosphate and a solvent, and then reacting for 2-5 hours at 80-90 ℃ and purifying to obtain the wear-resistant agent; (4) The preparation method of the matte wear-resistant glove comprises the steps of respectively plasticizing TPU composite particles and LDPE, performing coextrusion and blow molding to obtain a TPU/LDPE double-layer film, peeling off the LDPE layer to obtain a TPU film, and cutting, heat-sealing and hot-cutting the TPU film to obtain the finished product. Preferably, in the step S1, the dosage ratio of iodine, triphenylphosphine, dichloromethane, phenol, 2-trifluoromethyl benzoic acid and triethylamine is 15-20 mmol/30 mL/11-13 mmol/10 mmol/30-40 mmol. Preferably, in the step S2, the use amount ratio of the intermediate, 4- (trimethylsilane) phenylboronic acid, [ Pd (IPr) (cin) Cl ], potassium phosphate and the solvent is 2mmol:3.5-5mmol:0.06-0.12mmol:3-4mmol:3mL, and the solvent is obtained by mixing tetrahydrofuran and deionized water in a volume ratio of 1:1. Preferably, in the step (3), the preparation method of the modified calcium carbonate comprises the following steps of (a) dispersing calcium carbonate in deionized water, uniformly stirring, heating to 80-90 ℃ to obtain calcium carbonate slurry, (b) adding 4,4' -bis- (2-carboxyvinyl) -diphenyl ether and sodium stearate into the deionized water, stirring at 90-100 ℃ until the mixture is dissolved to obtain a modifier, and (C) adding the modifier into the calcium carbonate slurry