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Preparation method for hydrophilic trauma dressing made from polyurethane

A hydrophilic polyurethane and wound dressing technology, which is applied in the fields of adhesive dressings, dressings, medical science, etc., can solve the problems such as the introduction of the preparation of non-absorbent foam layers and matrix materials, and achieves good adhesiveness, good biocompatibility, and improved The effect of breathability

Inactive Publication Date: 2005-05-25
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent application mainly introduces the performance indicators and detection methods of the water-absorbing foam layer and the substrate, and only provides various materials suitable for the water-absorbing foam layer and the substrate, as well as their production, sellers, trademarks, and grades, and does not have any impact on the water-absorbing foam layer and substrate. Material preparation of foam layer and matrix for presentation

Method used

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  • Preparation method for hydrophilic trauma dressing made from polyurethane
  • Preparation method for hydrophilic trauma dressing made from polyurethane
  • Preparation method for hydrophilic trauma dressing made from polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The structure of polyurethane wound dressing in the present embodiment is as figure 1 As shown, the outer layer 1 and the inner layer 2 are compounded by pressure-sensitive adhesive, the inner layer is polyurethane soft foam slices, and the outer layer is polyurethane film. The preparation method is as follows:

[0048] 1. Preparation of polyurethane soft foam slices

[0049] Raw material formula:

[0050] Polyethylene glycol (molecular weight 1000) 47.25%

[0051] Toluene diisocyanate (TDI-80) 29.04%

[0052] Glycerol 1.97%

[0053] Polyether N210 17.39%

[0054] Stannous octoate 0.87%

[0055] Triethylenediamine 1.16%

[0056] Styrene / acrylonitrile graft polyether alcohol 0.29%

[0057] L-580 Silicone 0.87%

[0058] Deionized water 1.16%

[0059] The above percentages are percentages by weight.

[0060] Technological process: Stir the polyethylene glycol, toluene diisocyanate (TDI-80) and glycerol evenly at room temperature, then heat up to 80°C and react for...

Embodiment 2

[0071] The structure of polyurethane wound dressing in the present embodiment is as figure 2 As shown, the outer layer 1, the inner layer 2, and the peeling paper 3 are compounded by pressure-sensitive adhesive, the inner layer is a polyurethane soft foam slice, and the outer layer is a polyurethane film. The preparation method is as follows:

[0072] 1. Preparation of polyurethane soft foam slices

[0073] Raw material formula:

[0074] Polyethylene glycol (molecular weight 2000) 49.85%

[0075] Toluene diisocyanate (TDI-80) 27.81%

[0076] Glycerol 2.71%

[0077] Polyether N3010 14.57%

[0078] Stannous octoate 1.19%

[0079] Triethylenediamine 1.19%

[0080] Polybutadiene diol 0.30%

[0081] L-580 Silicone 0.89%

[0082] Deionized water 1.49%

[0083] The above percentages are percentages by weight.

[0084] Process flow: Stir the above polyethylene glycol, toluene diisocyanate (TDI-80) and glycerol at room temperature, then raise the temperature to 85°C and rea...

Embodiment 3

[0097] The structure of polyurethane wound dressing in the present embodiment is as image 3 As shown, the outer layer 1, the inner layer 2, and the release paper 3 are bonded and compounded. The inner layer is polyurethane soft foam slices, and the outer layer is medical adhesive tape or medical non-woven fabric with air holes. The preparation method is as follows:

[0098] 1. Preparation of polyurethane soft foam slices

[0099] Raw material formula:

[0100] Polyethylene glycol (molecular weight 1500) 45.44%

[0101] Toluene diisocyanate (TDI-80) 34.53%

[0102] Glycerol 2.10%

[0103] Polyether N210 12.16%

[0104] Stannous octoate 0.61%

[0105] Triethylenediamine 0.91%

[0106] Polybutadiene diol 0.91%

[0107] L-580 Silicone 1.52%

[0108] Deionized water 1.82%

[0109] The above percentages are percentages by weight.

[0110] Process flow: Stir the above polyethylene glycol, toluene diisocyanate (TDI-80) and glycerin at room temperature, then raise the temp...

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Abstract

The utility model relates to a hydrophilic polyurethane wound dressing, which is composed of a hydrophilic polyurethane soft foam slice and a moisture-permeable, air-permeable, waterproof and bacteria-proof polyurethane film. Preparation method: Stir polyethylene glycol, toluene diisocyanate (TDI-80) and glycerol evenly at room temperature, then raise the temperature to 80-90°C and react for 90-120 minutes to prepare a polyurethane prepolymer; Mix polyether, organotin catalyst, tertiary amine catalyst, cell opener, stabilizer and water evenly, then add polyurethane prepolymer, stir evenly, foam at room temperature, ripen for at least 24 hours and slice to obtain polyurethane soft foam slices; Prepare the polyurethane prepolymer into a solution of acetone or / and N,N-dimethylformamide with a concentration of 40.0-55.0%, then add water, cast it into a film, then remove the solvent at 40-80°C, and heat it at room temperature The polyurethane film can be obtained after 16-24 hours of curing reaction.

Description

1. Technical field [0001] The invention relates to a hydrophilic wound dressing and a preparation method thereof. 2. Background technology [0002] Traditional dressings such as gauze and cotton tend to adhere to the wound, breed bacteria, and cause secondary trauma when replaced. Some wound dressings sold on the market are not liquid-absorbent and air-tight. [0003] The patent application with the international publication number WO 01 / 60422 A1 discloses a surgical wound dressing, which is made of a water-absorbing foam layer bonded to a matrix. The water-absorbing foam layer does not increase in volume or only absorbs water or saline or wound secretions. There is little increase, and the matrix has excellent air permeability. This patent application mainly introduces the performance indicators and detection methods of the water-absorbing foam layer and the substrate, and only provides various materials suitable for the water-absorbing foam layer and the substrate, as we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F13/02A61L15/26C08G18/10C08J5/18
Inventor 郑昌琼黄忠兵程莉萍胡英李伯刚尹光福
Owner SICHUAN UNIV
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