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US 6,150,497 AGranted
Method for the production of polyglycolic acid
AssigneeSherwood Services AG
InventorsBommakanti Bala Subrahmanya Sastry, Andrew Murray Lichkus
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Abstract
A method for the production of polyglycolic acid polymer useful in the manufacture of sutures, meshes, gauzes, molded clips and like medical articles.
Claims1
A method for the production of polyglycolic acid polymer useful in the manufacture of surgical sutures and like medical materials comprising:
- a.) adding initiator and catalyst to 115 to 125 degree Celsius molten glycolide and blending;
- b.) increasing the glycolide temperature to approximately 160 degrees Celsius and holding for approximately 13 minutes;
- c.) increasing the glycolide temperature to approximately 180 degrees Celsius and holding for approximately 5 minutes;
- d.) increasing the glycolide temperature to approximately 190 degrees Celsius and holding for approximately 5 minutes;
- and
- e.) increasing the glycolide temperature to approximately 220 degrees Celsius and applying a vacuum for approximately 15 minutes to form polyglycolic acid.
3 more elements
Dependencies are inferred from the claim text.