Biodegradable copolymer, a biodegradable polymer composition, a biodegradable article, and a preparation process thereof
US5834567A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/664
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are a biodegradable copolymer and a biodegradable article molded therefrom, said copolymer having a number average molecular weight ranging from 1,000 to 1,000,000 consisting essentially of (A) from 5 to 99% by mol of epsilon-caprolactone or delta-valerolactone structural units and (B) from 95 to 1% by mol of oxetane structural units, said structural units being combined in the state of a block, and containing an organic aluminum-based Lewis acid represented by general formula (I) ##STR1## wherein R is an alkyl group having a carbon number ranging from 1 to 4, Y is independently selected from a substituted group, and p is any one of 1, 2 and 3. Also disclosed are block polymers of lactone and dimethyltrimethylene carbonate and blends of polylactone with polyoxetane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.