Synthetic copolymer surgical articles and method of manufacturin

Details Synthetic copolymer surgical articles and method of manufacturin Synthetic copolymer surgical articles and method of manufacturin

1982-07-01

1984-01-31

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

128346, 128334, 528354, C08G 6376, C08L 6700

Patent

active

044290802

ABSTRACT:
A triblock copolymer having a proportion of units having the formula: ##STR1## as the end blocks, and the formula (I) randomly combined with a proportion of units having the formula: ##STR2## as the middle block finds particular advantageous use in manufacturing absorbable monofilament sutures and other surgical articles. A surgical article is manufactured from a synthetic absorbable copolymer formed by copolymerizing glycolide with 1,3-dioxan-2-one (trimethylene carbonate) wherein a combination of the monomers is substantially completely polymerized before the addition of the other monomer in the presence of a difunctional initiator at or below about 180.degree. C.; glycolide is added and the temperature increased up to about the melting point of poly glycolide to form a triblock copolymer with a proportion of units having the formula: ##STR3## as the end blocks, and the formula (I) randomly combined with a proportion of units having the formula: ##STR4## as the middle block.

REFERENCES:
patent: 4080969 (1978-03-01), Casey et al.
patent: 4137921 (1979-02-01), Okuzumi et al.
patent: 4157437 (1979-06-01), Okuzumi et al.
patent: 4190720 (1980-02-01), Shalaby
patent: 4243775 (1981-01-01), Rosensaft et al.
patent: 4300565 (1981-11-01), Rosensaft et al.

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