Biodegradable optically active copolymers and processes for prod

Details Biodegradable optically active copolymers and processes for prod Biodegradable optically active copolymers and processes for prod

1994-08-09

1995-10-24

Dodson, Shelley A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528354, 528357, C08G 6306, C08G 6308

Patent

active

054611393

ABSTRACT:
A biodegradable optically active copolymer is disclosed, which is represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom or a methyl group; m and n each represents a natural number wherein the sum thereof gives 10 to 5,000; and C* represents an asymmetric carbon atom, and a process for producing the copolymer by ring-opening copolymerization of optically active .beta.-butyrolactone with a cyclic carbonate in the presence of catalyst. The biodegradable optically active copolymer of the present invention provides excellent biodegradability (enzyme degradability) and hydrolyzability.

REFERENCES:
patent: 4788979 (1988-12-01), Jarrett et al.
Phys. Technol., vol. 16 pp. 32-36 (1985).
Polymer Letters, vol. 9, pp. 173-178 (1971).
Macromolecules 1990, 23, pp. 3206-3212.
Macromolecules 1991, 24, pp. 5732-5733.
J. Polym. Sci., Part A, "Polym. Chem.", 32, (2), pp. 265-279 (1994).
J. Macromol. Sci.-Pure Appl. Chem., A29, (10), pp. 915-930 (1992).
Macromolecules, vol. 26, No. 16, Aug. 2, 1993, pp. 4388-4390.

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