Preparation method of polyurethane bandage with functions of promoting blood circulation and removing blood stasis and bandage prepared by method
A technology for promoting blood circulation and removing blood stasis and polyurethane, which is applied in the field of medical and sanitary products, can solve the problems of non-functional polyurethane bandage products, and achieve the effects of promoting early recovery, good plasticity and improving microcirculation.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0030] ① Preparation of polyurethane prepolymer
[0031] Add 100 parts of 4,4'-diphenylmethane diisocyanate, 0.5 parts of benzoyl chloride stabilizer and 2.5 parts of silicone defoamer After stirring at 45°C for 30 minutes, slowly add 20 parts of polypropylene glycol with a molecular weight of 800-1100, continue heating and stirring for 60 minutes, then add 35 parts of polypropylene glycol with a molecular weight of 1800-2200 dropwise, and add the catalyst dimethylethanolamine after 2 hours of reaction 3 parts, 5 parts of lubricant silicone oil, continue heating and stirring for 15 minutes.
[0032] ②Preparation of chitosan microspheres with drugs for promoting blood circulation and removing blood stasis
[0033] Dissolve 50 parts of chitosan in 5% acetic acid solution with a mass fraction of 5%, stir until completely dissolved, centrifuge and coagulate to obtain the chitosan solution; after standing for 36 hours, filter under reduced pressure, wash with absolute ethanol unti...
Embodiment 2
[0038] ① Preparation of polyurethane prepolymer
[0039] In a four-port reactor with a stirrer and a thermometer that feeds high-purity nitrogen, add 100 parts of 2,4'-diphenylmethane diisocyanate, 1.8 parts of benzoyl chloride and 3.2 parts of silicone defoamer. After stirring at 30°C for 30 minutes, slowly add 18 parts of polytetrahydrofuran diol with a molecular weight of 800-1100, continue heating and stirring for 100 minutes, then add 40 parts of polypropylene glycol with a molecular weight of 1800-2200 dropwise, and add catalyst triethylene glycol after 2.5 hours of reaction. 1-8 parts of diamine, 3-10 parts of silicone oil lubricant, continue heating and stirring for 50 minutes.
[0040] ②Preparation of chitosan microspheres with drugs for promoting blood circulation and removing blood stasis
[0041]Dissolve 50 parts of chitosan in 13% acetic acid solution with a mass fraction of 13%, stir until completely dissolved, and centrifuge to coagulate the chitosan solution; ...
Embodiment 3
[0045] ① Preparation of polyurethane prepolymer
[0046] In a four-port reactor with a stirrer and a thermometer that is fed with high-purity nitrogen, add 100 parts of 4,4'-diphenylmethane diisocyanate, 4.2 parts of propionyl chloride and 3.5 parts of silicone defoamer. After stirring at ℃ for 30 minutes, slowly add 30 parts of polyether triol with a molecular weight of 300-600, continue heating and stirring for 70 minutes, then add 10 parts of polytetrahydrofuran diol with a molecular weight of 1800-2200 dropwise, react for 1.5 hours, and then add an organotin catalyst Such as 3 parts of dibutyltin dilaurate, 5 parts of silicone oil lubricant, continue to heat and stir for 45 minutes.
[0047] ②Preparation of chitosan microspheres with drugs for promoting blood circulation and removing blood stasis
[0048] Dissolve 50 parts of chitosan in 15% acetic acid solution, stir until completely dissolved, obtain chitosan solution, and centrifuge to coagulate. After standing still ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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