Diblock and triblock copolymers
US4716203A · kind A · utility
80Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/916
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.