Functionally gradient polymeric materials
US6057406A · kind A · utility
20Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Aug 3, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/102
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Functionally gradient polymeric materials are formed by a process that utilizes an ascending polymerization front. A polymerization front is initiated in a reaction vessel containing a monomer solution. Additional monomers or resins are added on top of the polymerization front to maintain a substantially constant level. The composition of the monomers and/or additives are varied as they are added to the reaction vessel to form a functionally gradient polymeric material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.