04057537 is referenced by 130 patents and cites 9 patents.

Copolymers which can be fabricated into films, fibers and structural shapes are prepared by copolymerizing an optically active lactide, i.e., L-(-)-lactide, and epsilon caprolactone in the presence of a tin ester of a carboxylic acid. A copolymer prepared from 75 parts by weight of L-(-)-lactide and 25 parts by weight of epsilon caprolactone is a thermoplastic elastomer. A copolymer prepared from 90 parts by weight of L-(-)-lactide and 10 parts by weight of epsilon caprolactone is a rigid, clear, thermoplastic solid.

Title
Copolymers of L-(-)-lactide and epsilon caprolactone
Application Number
5/544788
Publication Number
4057537
Application Date
January 28, 1975
Publication Date
November 8, 1977
Inventor
Richard G Sinclair
Columbus
OH, US
Assignee
Gulf Oil Corporation
PA, US
IPC
C08G 63/08
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