Diblock and triblock copolymers

Details Diblock and triblock copolymers Diblock and triblock copolymers

1986-09-05

1987-12-29

Pertilla, Theodore E.

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

Synthetic resins

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

128 1R, 1283355, 524916, 528361, 528370, 525450, C08L 7102, C08G 6306

Patent

active

047162031

ABSTRACT:
A diblock copolymer is disclosed having a first block of a polyalkylene oxide and a second block of glycolic acid ester and trimethylene carbonate linkages. A triblock copolymer is disclosed having a middle block obtained from an ethylene oxide homopolymer or a copolymer of ethylene oxide and a cyclic ether. Alternatively, the triblock copolymer middle block is obtained from a copolymer of formula (I): ##STR1## and formula (II): ##STR2## The copolymers are useful in medical and surgical applications.

REFERENCES:
patent: 4047533 (1977-09-01), Perciaccante et al.
patent: 4438253 (1984-03-01), Casey et al.
patent: 4452973 (1984-06-01), Casey et al.

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