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Polyglycolic acid resin composition

一种树脂组合物、聚乙醇酸的技术，应用在其耐水解性改善了的组合物领域，能够解决耐水性耐久性未知等问题，达到耐水性改善的效果

Inactive Publication Date: 2008-12-10
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regarding the effect of the polymerization catalyst inactivating agent on the water resistance of polyglycolic acid resin (that is, the durability against water decomposition under relatively low temperature conditions such as around room temperature or a hydrolysis promoting atmosphere such as 50°C and 90% relative humidity) is unknown

Method used

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  • Polyglycolic acid resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 450 kg of glycolide (manufactured by Kleha Co., Ltd., 360 ppm of glycolic acid dimer, 13 ppm of water content) and 1600 g of n-dodecanol were placed in a sealable SUS container with a steam jacket structure and a stirrer, and then di 13.5 g (30 ppm) of tin chloride dihydrate, in a closed container, while stirring, circulate steam in the jacket, and heat until the temperature of the contents reaches 100°C. The contents became a homogeneous liquid on the way to heating. While keeping the temperature of the content at 100° C., it was transferred to a device made of a metal (SUS304) tube with an inner diameter of 28 mm. Immediately after transfer of glycolide to each tube was completed, the upper plate was mounted. Heat medium oil at 170° C. was circulated through the main body, and held for 7 hours to obtain a polyglycolic acid (PGA) block. This lump was pulverized with a pulverizer.

[0065] This pulverized PGA product was placed in a dryer blown with dry air having a ...

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Abstract

Disclosed is a polyglycolic acid resin composition having improved water resistance which is obtained by blending a carboxyl group-blocking agent and a polymerization catalyst deactivation agent in a polyglycolic acid resin.

Description

technical field [0001] The present invention relates to a composition comprising polyglycolic acid resin as a main component, and particularly having improved hydrolysis resistance (water resistance). Background technique [0002] Aliphatic polyesters such as polyglycolic acid and polylactic acid can be decomposed by microorganisms or enzymes present in nature such as soil and sea, and thus have attracted attention as biodegradable polymer materials with little environmental load. In addition, aliphatic polyesters are biodegradable and absorbable, so they can also be used as medical polymer materials such as surgical sutures and artificial skin. [0003] Among aliphatic polyesters, polyglycolic acid has excellent gas barrier properties such as oxygen barrier properties, carbon dioxide barrier properties, and water vapor barrier properties, and also has excellent heat resistance and mechanical strength. Therefore, it is widely used in the fields of packaging materials and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J5/18C08K5/25C08K5/29C08L101/16
CPCC08J5/18C08J2367/04C08K5/25C08K5/29C08L67/04
Inventor 佐藤浩幸阿久津文夫小林史典
Owner KUREHA KAGAKU KOGYO KK