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Process for preparing medical polyacrylamide aquogel

A technology of polyacrylamide and acrylamide monomers, used in medical science, prosthesis, etc., to achieve the effect of rapid removal

Inactive Publication Date: 2003-10-22
吉林富华医用高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Method used

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Embodiment

[0021] Mix 25 grams of acrylamide, 18 ml of 1% aqueous solution of N, N-ethylene bisacrylamide and 8 ml of 1% aqueous solution of triethanolamine in a one-liter reaction flask, filter impurities, and then add 10 ml of 0.5% supernatant Add ammonium sulfate aqueous solution and 04% sodium bisulfite aqueous solution, add sterile twice-distilled water to make the total volume reach 982 ml, pass nitrogen gas for 10-20 minutes to remove oxygen, and keep warm for 20-24 hours at 2.5-30°C. A gel containing 2.5% cross-linked polyacrylamide was obtained. Then add about 3 liters of ethanol solution with a concentration of about 70% in the container containing the hydrogel, and simultaneously use ultrasonic radiation with a wavelength of 40KHZ and a power of 100W for 40 minutes, and change the ethanol solution 3-4 times during this time. During the treatment, the water in the hydrogel was gradually sucked out, and the polyacrylamide molecules shrank and finally became a powdery precipitate...

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Abstract

The preparation method of medical polyacrylamide aquogel is characterized by that according to the medical application of aquogel, specially to the application of internal damaged region to be filledwith said aquogel and special requirements of acrylamide monomer low residue in said aquogel said invention uses organic solvent to extract the aquogel obtained when the polymerization reaction is completed, at the same time uses ultrasonic wave to make radiation so as to quickly and competely remove the acrylamide monomer from it so as t obtain the invented medical polyacrylamide aquogel.

Description

Technical field: [0001] The invention relates to a high molecular polymer, in particular to a hydrogel which can be used as a human body filling material and other medical purposes. technical background: [0002] Cross-linked polyacrylamide hydrogels have been used as medical materials for a period of time. Relatively mature usage methods are used in various electrophoresis processes, such as British Patent 4746551; coating materials, such as German Patent 1594389. [0003] In recent years, the use of this hydrogel to fill defects in the human body as plastic and cosmetic materials has attracted widespread attention. Such as Chinese patent 94195147, British patent 2164343A. For this purpose, the products that have been approved for use in China include "Ingelfall" from Ukraine and "Ogilvy" produced in China. [0004] Those skilled in the art know that when polyacrylamide hydrogel is used in medicine, especially as a repair material in the human body, the content of cytoto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/52C08L33/26
Inventor 曹孟君
Owner 吉林富华医用高分子材料有限公司
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