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Method for improving hydrolysis resistance of biodegradable polyester resin

A technology for degrading polyester and hydrolysis resistance, applied in coatings and other directions, can solve problems such as irritating odor, strong toxicity and mutagenicity

Active Publication Date: 2014-01-08
GUANGZHOU BIOSEAL BIOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above method improves the hydrolysis resistance of polyester resin, the introduction of epoxy groups and amino groups makes polyester materials have certain cytotoxicity, and the volatility of polycarbodiimide materials during processing Isocyanate has pungent odor, strong toxicity and mutagenicity, etc., which limits the application of additive method in improving the water resistance of biodegradable polyester resin

Method used

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  • Method for improving hydrolysis resistance of biodegradable polyester resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for improving the hydrolysis resistance of biodegradable polyester resin, the steps are:

[0020] A. Preparation of coating solution: Dissolve 0.25g, 1.0g, 1.75g, 2.5gPPC (polymethylethylene carbonate, number average molecular weight 260,000, molecular weight distribution 4.97) in 50mL chloroform solution and stir for 3- After 5 hours, disperse in supernatant for 10 minutes, and prepare PPC chloroform coating solutions with concentrations of 5mg / mL, 20mg / mL, 35mg / mL, and 50mg / mL respectively.

[0021] B. Dip coating: Take 100 profiles injection-molded by PGA (polyglycolide, number average molecular weight 60,000) polyester resin, firstly immerse them in PPC chloroform solution with a concentration of 5 mg / mL, and immerse them on the surface of the PGA profiles. Apply a layer of PPC film, take it out, and place it on the mesh support in the air until the chloroform solution is completely volatilized (in order to accelerate the volatilization of the chloroform so...

Embodiment 2

[0024] A method for improving the hydrolysis resistance of biodegradable polyester resin, the steps are:

[0025] A. Preparation of coating solution: Take 0.5g, 1.5g, 2.5gPPC (polymethylethylene carbonate, polymethylethylene carbonate, number average molecular weight 260,000, molecular weight distribution 4.97) and dissolve them in 50mL chloroform solution , stir for 3-5 hours, super-disperse for 10 minutes, and prepare PPC chloroform coating solutions with concentrations of 10mg / mL, 30mg / mL, and 50mg / mL.

[0026] B. Dip coating: Take 100 profiles injection-molded by PGA (polyglycolide, number average molecular weight 60,000) polyester resin, firstly immerse them in PPC chloroform solution with a concentration of 10 mg / mL, and dip on the surface of the PGA profiles. Apply a layer of PPC film, take it out, and place it on the mesh support in the air until the chloroform solution is completely volatilized (in order to accelerate the volatilization of the chloroform solution, it ...

Embodiment 3

[0029] A method for improving the hydrolysis resistance of biodegradable polyester resin, the steps are:

[0030]A. Preparation of coating solution: Take 0.25g, 0.75, 1., 25g, 1.75g, 2.5gPPC (polymethylethylene carbonate, number average molecular weight 260,000, molecular weight distribution 4.97) and dissolve them in 50mL chloroform solution , stirred for 3-5 hours, super-dispersed for 10 minutes, and prepared PPC chloroform coating solutions with concentrations of 5mg / mL, 15mg / mL, 25mg / mL, 35mg / mL, and 45mg / mL.

[0031] B. Dip coating: Take 100 injection-molded profiles of PGA (polyglycolide, number average molecular weight: 60,000) polyester resin, firstly immerse in PPC chloroform solution with a concentration of 5mg / mL, and apply it on the surface of PGA profiles Dip-coat a layer of PPC film, take it out, and place it on the mesh support in the air until the chloroform solution is completely volatilized; then repeat the above operations in the order of increasing concentr...

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Abstract

The invention discloses a method for improving hydrolysis resistance of biodegradable polyester resin. According to the method, poly-methyl ethylene carbonic ester is served as a coating, and the matrix of the aliphatic series iodegradable polyester homopolymer or copolymer product is dipped and coated thereby. Compared with the biodegradable resin product without surface coating, the biodegradable resin product subjected to surface coating disclosed by the invention has obviously improved hydrolysis resistance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a method for improving the hydrolysis resistance of biodegradable polyester resins. Background technique [0002] Due to its special properties of degradable and absorbable in vivo, biodegradable polyester avoids the disadvantages of secondary surgical removal of traditional medical materials. It is used in surgical sutures, bone fixation materials, artificial blood vessels, skin, drug release systems, etc. Implantation sites for temporary storage have a wide range of clinical applications. The suture made of biodegradable polyester solves the problem that the mechanical strength of traditional catgut decreases too quickly and the binding strength is not easy to maintain; while the internal fixation made of biodegradable polyester solves the problem of bone rigidity and metal rigidity. Delayed bone healing, local inflammation and other problems caused by mismatch. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08L67/04C08L67/02C08L69/00
Inventor 陈彦文刘玉房鑫卿孟跃中
Owner GUANGZHOU BIOSEAL BIOTECH
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