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Macromolecule fascia and method for preparing the same

A technology of polymers and bandages, applied in bandages, medical science, absorbent pads, etc., can solve the problems of non-decreasing adhesiveness of bandages and single color, and achieve the effect of product color diversification

Active Publication Date: 2009-09-16
BEIJING JINWEI KANGDA MEDICAL INSTR LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The bandage provided by the invention and its manufacturing method can further overcome the technical problem of single color of existing products, and the adhesiveness of the bandage after curing will not decrease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First heat the polyether (polyether GE210 produced by Shanghai Gaoqiao Chemical Factory) at a pressure of about -0.1Mpa to 80°C, keep the temperature constant for 30 minutes, and then heat again. When the temperature rises to 100°C, keep the temperature constant for 30 minutes and continue heating, and when the temperature rises to 120°C, keep the temperature constant for 60 minutes for later use.

[0026] Under the conditions of stirring and nitrogen blanketing, first add liquid diphenylmethane diisocyanate (isocyanate MSBASF product) at a temperature of 50 ° C, and then add polyether in a dropwise manner, with a dropping rate of 10 c / min and a stirring speed of 100 rpm Then, heat the reaction material to 70°C and use cold / hot water double temperature control method to stabilize the temperature at 80°C for 1 hour, then cool down to 60°C, and finally add various additives, including stabilizers, catalysts, Defoamer, filler (nano-calcium carbonate Shanghai Gerunya Nano M...

Embodiment 2

[0034] Under the conditions of stirring and nitrogen blanketing, first add liquid carbodiimide modified MDI at a temperature of 50 °C, and then add polyether in a dropwise manner, with a dropping speed of 10 c / min and a stirring speed of 100 rpm, and then Heating the reaction material to 70°C, adopting double temperature control method of cold / hot water, keeping the temperature at 80°C for 1 hour, then cooling down to 60°C, and finally adding various additives. At this point the stirring speed was increased to 200 rpm for 1 hour. Under the protection of nitrogen, the discharged material is put into a container for use. The polyurethane prepolymer has a viscosity of 1200 centipoise at 50° C. and an NCO% content of 15.

[0035] In the bandage prepared by the above method, the polyurethane prepolymer accounts for 40% by weight of the bandage (the same below), the catalyst content is 2%, and the particle diameter of the filler is less than 100nm, and its content is 2%.

[0036] ...

Embodiment 3

[0039]Under the conditions of stirring and nitrogen blanketing, first add the liquid MDI / carbodiimide modified MDI mixture at a temperature of 50°C, and then add the mixed polyether in a dropwise manner, the dropping speed is 10c / min, and the stirring speed is 100 rpm / min, then heat the reaction material to 70°C, use cold / hot water double temperature control method, stabilize the temperature at 80°C for 1 hour, then cool down to 60°C, and finally add various additives, including stabilizers, catalysts , defoamer, filler and liquid paste. At this point the stirring speed was increased to 200 rpm for 1 hour. Under the protection of nitrogen, the discharged material is put into a container for use. The polyurethane prepolymer has a viscosity of 1100 centipoise at 50° C. and an NCO% content of 15.

[0040] In the bandage prepared by the above method, the polyurethane prepolymer accounts for 35% by weight of the bandage (the same below), the catalyst content is 1.05%, and the pa...

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Abstract

The invention relates to a polymer bandage and a preparation method thereof, which solves the technical problem of uneven distribution of prepolymers during storage of the bandage, and at the same time prevents the adhesiveness of the bandage after curing from decreasing. It is provided with a base material, The substrate contains polyurethane prepolymer, catalyst and filler. The weight percentage of polyurethane prepolymer in the bandage (the same below) is 20-50%, the catalyst is dimorpholine diethyl ether, and its content is 0.1-5%. The particle diameter is less than 100nm, and its content is 0.1-5%. The present invention can be widely used for surgical fixation.

Description

Technical field: [0001] The invention relates to a surgical fixation material and a preparation method thereof, in particular to a polymer bandage and a preparation method thereof. Background technique: [0002] Plaster bandage is the most common external fixation material in orthopedic treatment. Although the method of applying plaster is an essential treatment procedure, it brings obvious discomfort to orthopedic patients. Due to fracture treatment, plaster bandages need to be applied for 3-10 weeks, resulting in long-term contact between the patient's skin and plaster. This can easily cause itching, discomfort and inflammation, and the plaster is bulky, poor in strength, inelastic after curing, airtight, and will soften or break after soaking in water. In addition, the X-ray transparency is poor. After the plaster is applied, X-ray film examination cannot be carried out effectively. This is not conducive to checking the progress of fracture treatment, so it is impossible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L15/20
Inventor 姚克俭康文斌李东春卢英芬
Owner BEIJING JINWEI KANGDA MEDICAL INSTR LTD
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