Semi-crystalline, fast absorbing polymer formulation
AssigneeEthicon, Inc.
InventorSasa Andjelic
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Abstract
The present invention relates to a composition comprising a semi-crystalline, absorbable copolymer formulation wherein the first component is hydroxy-capped polycondensation product of diglycolic acid and a mixture of two idols, diethylene glycol (DEG) and ethylene glycol (EG), with DEG added in larger molar amount, and wherein the second component, glycolide is incorporated during the subsequent ring-opening polymerization. The resulting hydrophilic resin has low crystallinity level, glass transition temperature, Tg, slightly below room temperature, and may be particularly useful for making monofilaments, multifilaments, microspheres, or melt blown nonwoven constructs or other medical devices where fast hydrolysis rates and superior mechanical properties are desirable.
Claims9
A co-polyester comprising the reaction product of a polycondensation polyester and at least one lactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof with diethylene glycol and ethylene glycol wherein the molar ratio of diethylene glycol to ethylene glycol is in the range from about 2:1 to 4:1;
- and wherein the co-polyester comprises about 30 to 50% by weight of the polycondensation polyester based on the total weight of the co-polyester and comprises a crystallinity ranging from about 10 to 50%.
Dependencies are inferred from the claim text.