Copolymers of L-(-)-lactide and epsilon caprolactone
US4057537A · kind A · utility
136Cited by
8References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 28, 1975 |
| Grant date | Nov 8, 1977 |
| Priority date | — |
| Expiry date | Jan 28, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.