Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF1 Cites 5 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

A hydrophilic polyurethane wound dressing is composed of hydrophilic polyurethane soft foam slices and a moisture-permeable, breathable, waterproof and bacteria-isolating 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; stir the polyurethane prepolymer at room temperature. Mix polyether, organotin catalyst, tertiary amine catalyst, pore opening agent, stabilizer and water evenly, then add polyurethane prepolymer, stir evenly, foam at room temperature, and mature for at least 24 hours into slices to obtain polyurethane soft foam slices; Prepare the polyurethane prepolymer into an acetone or / and N,N-dimethylformamide solution with a concentration of 40.0 to 55.0%, then add water, cast it to form a film, then remove the solvent at 40 to 80°C, and freeze at room temperature. The polyurethane film can be obtained after curing reaction for 16 to 24 hours.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com