Preparation method of polyurethane bandage with functions of sterilization and itch relief and bandage manufactured by method

A sterilization and antipruritic, polyurethane technology, applied in the field of medical and sanitary products, can solve the problems of expensive raw materials of polyurethane bandages, insufficient breathability of the bandages, redness and itching of the skin, etc., and achieves the effects of low manufacturing cost, prevention of redness, swelling and itching, and light weight.

Active Publication Date: 2013-11-27
浙江斯坦格运动护具科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, we found that polyurethane bandage products at home and abroad can easily cause skin redness, swelling, itching and other allergic phenomena. Since polyurethane bandages generally use 5-8 layers, although the air permeability is better than that of tight plaster bandages, it is not suitable for use in hot summer. Or for those with sensitive skin, the patient's skin will have itching, redness and swelling due to insufficient ventilation of the bandage; moreover, the raw materials of the existing polyurethane bandage are expensive, and the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] ① Preparation of polyurethane prepolymer

[0037] Add 100 parts of 4,4'-diphenylmethane diisocyanate, 0.5 parts of benzoyl chloride stabilizer and 2.5 parts of silicone defoamer After stirring at 45°C for 30 minutes, slowly add 20 parts of polypropylene glycol with a molecular weight of 800-1100, continue heating and stirring for 60 minutes, then add 35 parts of polypropylene glycol with a molecular weight of 1800-2200 dropwise, and add the catalyst dimethylethanolamine after 2 hours of reaction 3 parts, lubricant silicone oil 5 parts, continue heating and stirring for 15 minutes to obtain polyurethane prepolymer.

[0038] ②Preparation of chitosan microspheres with bactericidal and antipruritic drugs

[0039] Dissolve 50 parts of chitosan in 5% acetic acid solution with a mass fraction of 5%, stir until completely dissolved, centrifuge and coagulate to obtain the chitosan solution; after standing for 36 hours, filter under reduced pressure, wash with absolute ethanol u...

Embodiment 2

[0043] ① Preparation of polyurethane prepolymer

[0044] In a four-port reactor with a stirrer and a thermometer that feeds high-purity nitrogen, add 100 parts of 2,4'-diphenylmethane diisocyanate, 1.8 parts of benzoyl chloride and 3.2 parts of silicone defoamer. After stirring at 30°C for 30 minutes, slowly add 18 parts of polytetrahydrofuran diol with a molecular weight of 800-1100, continue heating and stirring for 90 minutes, then add 40 parts of polypropylene glycol with a molecular weight of 1800-2200 dropwise, and add the catalyst triethylene glycol after 2.5 hours of reaction. 1-8 parts of diamine, 3-10 parts of silicone oil lubricant, and continue heating and stirring for 50 minutes to obtain a polyurethane prepolymer.

[0045] ②Preparation of chitosan quaternary ammonium salt with bactericidal and antipruritic functions

[0046] In 10 parts of acetone medium, add 5 parts of mass fraction of 30% sodium hydroxide as an acid-binding agent, add 5 parts of quaternizing a...

Embodiment 3

[0050] ① Preparation of polyurethane prepolymer

[0051] In a four-port reactor with a stirrer and a thermometer that is fed with high-purity nitrogen, add 100 parts of 4,4'-diphenylmethane diisocyanate, 4.2 parts of propionyl chloride and 3.5 parts of silicone defoamer. After stirring at ℃ for 30 minutes, slowly add 30 parts of polyether triol with a molecular weight of 300-600, continue heating and stirring for 70 minutes, then add 10 parts of polytetrahydrofuran diol with a molecular weight of 1800-2200 dropwise, react for 1.5 hours, and then add an organotin catalyst 3 parts of dibutyltin dilaurate and 5 parts of silicone oil lubricant in the mixture, and continue heating and stirring for 45 minutes to obtain a polyurethane prepolymer.

[0052] ②Preparation of chitosan microspheres with bactericidal and antipruritic drugs

[0053] Dissolve 50 parts of chitosan in 15% acetic acid solution, stir until completely dissolved, obtain chitosan solution, and centrifuge to coagula...

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PUM

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Abstract

The invention discloses a preparation method of a medical polyurethane bandage with the functions of sterilization and itch relief. The preparation method comprises the following steps of firstly preparing a polyurethane prepolymer and chitosan microspheres or chitosan quaternary ammonium salt with the functions of sterilization and itch relief, then uniformly coating the polyurethane prepolymer on base cloth, and coating chitosan microspheres or chitosan quaternary ammonium salt on the base cloth coated with the polyurethane prepolymer under the guiding of a guide drum. The bandage prepared by the method comprises a base material, the polyurethane prepolymer coated on the base material and the chitosan microspheres or chitosan quaternary ammonium salt with the functions of sterilization and itch relief, and therefore, compared with conventional immovable bandages, the bandage prepared by the method has the advantages of good shaping property, high strength, light weight, low cost and aesthetic property and can be used for effectively killing bacteria on the surfaces of skins so as to prevent the skins from swelling and itching and providing a dry comfortable environment for patients.

Description

technical field [0001] The invention relates to the technical field of medical and sanitary products, in particular to a method for preparing a water chain-extended medical polyurethane bandage with the function of sterilizing and relieving itching, and the bandage prepared by the method. Background technique [0002] In the early 1980s, Bayer first proposed coating polyurethane prepolymers on mesh fabrics to make bandages, which was a major development in the field of orthopedic treatment. The method of using this bandage is to contact the bandage with water at room temperature first, and then wrap it around the affected part of the patient. The polyurethane prepolymer coated on the base cloth will react with water and gradually harden from the initially soft plastic bandage. Finally, a rigid material is formed to fix the patient's affected part. At this time, the bandage has a high strength and its shape cannot be changed. Because the bandage has the advantages of light w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/28A61L15/26A61L15/44A61L15/42
Inventor 王栋陆莹沈博强胡修元张新强
Owner 浙江斯坦格运动护具科技有限公司
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