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Preparation method of polyurethane resin composite material for medical bandage coating

A technology of polyurethane resin and composite material, used in bandages, medical science, absorbent pads, etc., can solve the problems of poor air permeability of bandages, and achieve the effect of improving the comfort of use, balancing metabolism and blood circulation, and high strength

Inactive Publication Date: 2019-06-14
亳州科蔚科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor air permeability of existing medical bandages, and to provide a method for preparing polyurethane resin composites for coating medical bandages

Method used

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  • Preparation method of polyurethane resin composite material for medical bandage coating

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preparation example Construction

[0024] A preparation method of polyurethane resin composite material for medical bandage coating, comprising the following contents:

[0025] (1) Preparation of polyurethane prepolymer: raw materials in parts by weight, 80-100 parts of polyether diol, 12-16 parts of diisocyanate, 4-6 parts of tertiary vinyl carbonate, 1-2 parts of Nitrogen-containing organic base, 6-8 parts of bismorpholino diethyl ether, 1-2 parts of pentamethyldiethylenetriamine, stirred and reacted for 1-2 hours at a temperature of 85-90°C to obtain Polyurethane prepolymer;

[0026] (2) Preparation of polyurethane resin composite material: Raw materials are calculated in parts by weight, heat 100 parts of polyurethane prepolymer to 60-70°C, and add 12-16 parts of nano strontium-doped hydroxyapatite, 2- 3 parts of chitosan derivatives, 0.2-0.8 parts of S-methylisothiourea sulfate, 0.2-0.8 parts of 2,2'-methylenebis(4-methyl-6-tert-butylphenol), stirring React for 2-3 hours to obtain the polyurethane resin ...

Embodiment 1

[0044] A preparation method of polyurethane resin composite material for medical bandage coating, comprising the following contents:

[0045] (1) Preparation of polyurethane prepolymer: raw materials in parts by weight, 90 parts of polyether N210, 14 parts of diisocyanate, 5 parts of tertiary vinyl carbonate, 1.5 parts of nitrogen-containing organic base, 7 parts of bismorpholine Base diethyl ether, 1.5 parts of pentamethyldiethylenetriamine, stirred and reacted for 1.5 hours at a temperature of 88 ° C to obtain a polyurethane prepolymer;

[0046] (2) Preparation of polyurethane resin composite material: Raw materials are calculated in parts by weight. Heat 100 parts of polyurethane prepolymer to 65 ° C. Under nitrogen atmosphere, add 14 parts of nano strontium-doped hydroxyapatite and 2.5 parts of p-hydroxybenzoic acid Chitosan ester, 0.5 part of S-methylisothiouronium sulfate, 0.5 part of 2,2'-methylenebis(4-methyl-6-tert-butylphenol), stirred for 2.5 hours to obtain polyure...

Embodiment 2

[0052] A preparation method of polyurethane resin composite material for medical bandage coating, comprising the following contents:

[0053] (1) Preparation of polyurethane prepolymer: raw materials in parts by weight, 80 parts of polyether N220, 16 parts of diisocyanate, 4 parts of tertiary vinyl carbonate, 2 parts of nitrogen-containing organic base, 6 parts of bismorpholine Base diethyl ether, 1 part of pentamethyldiethylenetriamine, stirred and reacted for 2 hours at a temperature of 85 ° C to obtain a polyurethane prepolymer;

[0054] (2) Preparation of polyurethane resin composite material: Raw materials in parts by weight, heat 100 parts of polyurethane prepolymer to 70°C, add 12 parts of nano strontium-doped hydroxyapatite, 3 parts of carboxymethyl shell polysaccharide, 0.2 part of S-methylisothiouronium sulfate, 0.8 part of 2,2'-methylenebis(4-methyl-6-tert-butylphenol), stirred and reacted for 3 hours to obtain polyurethane resin compound material;

[0055] The po...

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Abstract

The invention belongs to the technical field of macromolecular medical products, and particularly relates to a preparation method of a polyurethane resin composite material for medical bandage coating, including preparation of polyurethane performed polymers and preparation of the polyurethane resin composite material, also including a preparation method of the medical bandage. Compared with the prior art, the method has the advantages that during the preparation of the polyurethane performed polymers, through the cooperated enhanced catalysis effect of DMDEE and PMDETA, the effect is better than that of the single use of any one catalyst; through the addition of nanometer strontium-doped hydroxyapatite, the problem of distribution nonuniformity of the performed polymers during the storageof the medical bandage can be solved; meanwhile, through being matched with the use of chitosan derivatives, sterilization and bacterium inhibition can be effectively achieved; the medical bandage coated by polyurethane performed polymers can maintain the softness and toughness of base cloth; the high intensity can be realized after the water meeting; meanwhile, the moisture absorption and ventilation effects can be effectively achieved; the white stewing phenomenon can be avoided; the use comfortable feeling is improved on the basis of ensuring the bandage functions.

Description

technical field [0001] The invention belongs to the technical field of polymer medical products, and in particular relates to a preparation method of a polyurethane resin composite material for coating medical bandages. Background technique [0002] In the early 1980s, Bayer first proposed to coat polyurethane prepolymer on mesh fabric 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 weight, high strength, and good X-ray permeability, it has been widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/64C08G18/32C08G18/12A61L15/28A61L15/26A61L15/18A61L15/46A61L15/42
Inventor 余国海
Owner 亳州科蔚科技服务有限公司
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