Isomorphic copolyoxalates and sutures thereof

Details Isomorphic copolyoxalates and sutures thereof Isomorphic copolyoxalates and sutures thereof

C - Chemistry, Metallurgy

08

G

402/213, 167/323

C08G 63/16 (2006.01) D01F 6/62 (2006.01) A61F 1/00 (1980.01)

Patent

CA 1120640

ABSTRACT Synthetic absorbable sutures are prepared from copolyoxalate polymers having isomorphic sequences. The polymers are derived from mixtures of cyclic and linear diols, each having the same carbon chain length of 6 or 8 atoms. The cyclic diol may be aliphatic or aromatic. The diols are polymerized with dialkyl oxalate, preferably in the presence of an inorganic or organometallic catalyst, to obtain a highly crystalline isomorphic copolyoxalate polymer which is melt extruded and drawn to form oriented filaments. The filamenes are characterized by good initial tensile and knot strength and a high order of softness and flexibility. When implanted in living animal tissue, the fibers have good strength retention over a period of at least 21 days and eventually absorb with a minimal degree of adverse tissue reaction.

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