Orthopedic bandage having improved catalyst system
US4344423A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1977 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Sep 6, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L15/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The instant invention relates to an orthopedic bandage which hardens by means of a free radical catalyzed polymerization reaction, wherein said reaction is initiated by an improved redox catalyst system, and an improved method for forming a cast from said orthopedic bandage. The bandage comprises a flexible carrier having a cast forming composition comprising a monomer (polymerizable by means of said improved redox catalyst system) supported thereon, which monomer may be a solid, water soluble vinyl monomer such as diacetone acrylamide (DAA), N isopropylacrylamide (N-IPA) or mixtures thereof. The improved catalyst system includes a copper salt in combination with a reducing agent such as ferrous sulfate, sodium sulfite, oxalic acid and the like. The preferred copper salt is cupric acetylacetonate. The polymerization of the above monomer may be initiated by contacting the cast forming composition with water, in the presence of said improved redox catalyst system, e.g. by dipping the bandage, including the improved redox catalyst system supported thereon, in tap water. In one embodiment of the invention, the bandage comprises the improved redox catalyst system in combination with the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.