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A kind of preparation method of the medical bandage coated with polyurethane resin prepolymer

A polyurethane prepolymer and polyurethane resin technology, applied in bandages, medical science, fiber types, etc., can solve problems such as environmental pressure, inconvenient use, and aggravate patient pain, and achieve production cost savings, simple preparation process, and low equipment requirements Effect

Active Publication Date: 2017-01-11
安徽省吉徽材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing polyurethane bandages are mainly used for fixation of fractures, joint dislocation injuries, orthopedic deformities, and can also be used for fixation after surgery for peripheral nerves, blood vessels, and tendons. Due to surgical bone injuries, it generally takes about 4-10 weeks to recover. The current bandages are in contact with the body surface for a long time, and the moisture, bacteria, and fungi emitted from the surface of the human skin will stay at the interface between the bandage and the body surface, breed and multiply, and cause allergic phenomena such as itching, redness, and swelling to infect the wound, causing Qi and blood are not smooth, which is not conducive to the recovery of bone injuries and aggravates the suffering of patients
Patent No.: CN102886065A discloses a traditional Chinese medicine composition used in medical polymer bandages. Acrylate is used as a polymer prepolymer. Although the bandage has the effects of reducing inflammation, relieving pain, promoting blood circulation and removing blood stasis after curing, the bandage has low strength and no Sterilizes and promotes healing, and acrylate resin has a pungent smell during curing, which seriously affects the respiratory health of doctors and patients, and is inconvenient to use
Patent No.: CN103405802A discloses a preparation method of a polyurethane bandage using organic synthetic drug quaternary ammonium salt as a functional body for sterilizing and antipruritic. The pressure is not conducive to large-scale application

Method used

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Examples

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Effect test

preparation example Construction

[0010] The invention discloses a method for preparing a medical bandage coated with a polyurethane resin prepolymer, comprising the following steps: a. Preparation of the polyurethane prepolymer: adding 50 to 65 parts of aromatic diisocyanate, 0.1 ~1 part of dehydrating agent, after stirring at room temperature for 20 minutes, then add 20~30 parts of polyether diol, 2~5 parts of polyether triol, 5~15 parts of high molecular weight polyethylene glycol Alcohol, 2-4 parts of defoamer, 5-10 parts of white carbon black, 1-5 parts of lubricant, 1-2 parts of catalyst, heat up to 75°C, keep warm for 1.5 hours, and then cool down to room temperature, then Polyurethane prepolymer is obtained, and the amount of raw materials is in parts by weight; b. Preparation of functional body powder: adding powdered nanoscale particles, zinc oxide and far-infrared emitting materials to absolute ethanol and coupling agent solution, Fully stir at 70°C for 3 to 4 hours, dry at 80°C for 5 hours, and gri...

Embodiment 1

[0016] Add 1000g of MDI diisocyanate and 15g of benzoyl chloride into the reaction kettle with thermometer, stirrer and nitrogen inlet and outlet in sequence, stir fully for 20min, add polyoxypropylene ether glycol 750g, its molecular weight is 2000, polyoxypropylene ether Trihydric alcohol 250g, its molecular weight is 300, add polyethylene glycol 100g, its molecular weight is 6000, heat up to 75 ℃, keep warm for 1.5h, cool down to room temperature, add polyethylene oxide 50g, nano-scale calcium oxide 50g, nano-scale white 150g of carbon black, stirred for 1h under nitrogen protection, made polyurethane prepolymer for use; mixed nano-scale silver particles, zinc oxide particles, titanium dioxide particles, and fluorite particles in equal mass proportions, totaling 80g, added with condensing reflux, In the reaction kettle of the mechanical stirring device, add 100g of absolute ethanol, 20g of silane coupling agent, 5g of PVP in sequence, its molecular weight is 4000, control th...

Embodiment 2

[0018] Put 1000g of TDI diisocyanate and 20g of benzoyl chloride into the reaction kettle with thermometer, stirrer and nitrogen inlet and outlet in sequence, stir well for 20min, add 600g of polyethylene glycol, its molecular weight is 1000, polyoxypropylene ether ternary Alcohol 300g, its molecular weight is 600, add polyethylene glycol 200g, its molecular weight is 6000, heat up to 75°C, keep warm for 1.5h, cool down to room temperature, add polyethylene oxide 50g, nano-sized molecular sieve 60g, nano-sized white carbon black 100g , stirred for 1h under nitrogen protection, and made polyurethane prepolymer for use; nano-scale copper particles, zinc oxide particles, titanium dioxide particles, and tourmaline particles were mixed according to the ratio of equal mass 2:1:1:1:1, a total of 70g, Put it into the reaction kettle with condensation reflux and mechanical stirring device, add 100g of absolute ethanol, 20g of silane coupling agent, 5g of PVP in sequence, its molecular w...

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Abstract

The invention discloses a preparation method of a medical bandage coated with a polyurethane resin prepolymer. The preparation method comprises the following steps: a. adding aromatic diisocyanate and a dehydrating agent to a reaction kettle, stirring, adding polyether glycol, polyether triols, high molecular polyethylene glycol, a defoaming agent, white carbon black, a lubricant and a catalyst, heating up to 75 DEG C and preserving heat, and then cooling to room temperature to obtain a polyurethane prepolymer; b. adding powdery nanoparticles, zinc oxide and a far infrared emitting material to absolute ethyl alcohol and a coupling agent solution, sufficiently stirring, drying and grinding to obtain functional powder; c. adding the functional powder to the polyurethane prepolymer, and sufficiently stirring for reacting under a nitrogen protection condition to obtain the polyurethane resin prepolymer; and d. uniformly coating base cloth with the polyurethane resin prepolymer, and conveying, rolling, coiling, shearing, sealing and bagging to obtain the medical bandage coated with the polyurethane resin prepolymer.

Description

technical field [0001] The invention relates to the technical field of polymer medical products, in particular to a method for preparing a medical bandage coated with a polyurethane resin prepolymer. Background technique [0002] Existing polyurethane bandages are mainly used for fixation of fractures, joint dislocation injuries, orthopedic deformities, and can also be used for fixation after surgery for peripheral nerves, blood vessels, and tendons. Due to surgical bone injuries, it generally takes about 4-10 weeks to recover. The current bandages are in contact with the body surface for a long time, and the moisture, bacteria, and fungi emitted from the surface of the human skin will stay at the interface between the bandage and the body surface, breed and multiply, and cause allergic phenomena such as itching, redness, and swelling to infect the wound, causing Qi and blood are not smooth, which is not conducive to the recovery of bone injuries and aggravates the suffering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/564C08G18/66C08G18/48C08K13/06C08K9/04C08K7/00C08K3/08C08K3/22C08K3/36C08K3/38A61F13/00D06M101/32
Inventor 张伟
Owner 安徽省吉徽材料科技有限公司
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