POLY(GLYCOLIC ACID/POLY(OXYETHYLENE)TRIBLOCK COPOLYMERS AND METHOD OF MANUFACTURING THE SAME

POLY(GLYCOLIC ACID)/POLY(OXYETHYLENE)TRIBLOCK COPOLYMERS AND METHOD OF MANUFACTURING THE SAME Poly(glycolic acid)poly(oxyethylene) ABA triblock copolymers having the following formula: < IMG > wherein R represents an alkylene, x is about 37.5 to 47.5, and y is about 5 to 25, weight percent. Th...

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Hauptverfasser:	CASEY, DONALD J, ROBY, MARK S
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON DISINFECTION, STERILISATION, OR DEODORISATION OF AIR HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METALLURGY METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	POLY(GLYCOLIC ACID)/POLY(OXYETHYLENE)TRIBLOCK COPOLYMERS AND METHOD OF MANUFACTURING THE SAME Poly(glycolic acid)poly(oxyethylene) ABA triblock copolymers having the following formula: < IMG > wherein R represents an alkylene, x is about 37.5 to 47.5, and y is about 5 to 25, weight percent. The copolymers are useful for manufacturing fibers possessing a sufficiently low modulus of elasticity to permit their use as absorbable sutures having the requisite flexibility for use in monofilament form. A process of preparation involves purifying the hydroxyl-ended poly(oxyalkylene) and allowing it to react with glycolide to produce an ABA triblock copolymer of extrusion grade in which A represents a polyglycolic acid block and B represents a poly(oxyalkylene) block.