Method for the manufacture of polymer products from cyclic esters
US5225129A · kind A · utility
50Cited by
12References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1991 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Jul 18, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the manufacture of polymer products from cyclic esters, according to which a catalyst and cyclic monomers are mixed in a mixing chamber and are optionally brought to a higher temperature, after which the mixture is injected, under pressure, into a cavity of a mold consisting of at least two parts and the mold is heated for some time at a temperature above the melting temperature of the monomers, after which the mold is opened and the product is removed from the mold. Polymer products manufactured by this method can be used in medical fields and particularly in reconstructive orthopedics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.