| 摘要 |
In an orthopedic bandage which hardens by means of a free radical catalyzed polymerization reaction, wherein said bandage comprises a cast forming composition including a solid water soluble vinyl monomer such as diacetoneacrylamide (DAA), N-isopropylacrylamide (N-IPA) or mixtures thereof, and at least one component of an improved redox catalyst system capable of initiating the polymerization of such vinyl monomer, said redox catalyst system comprising a copper containing compound in combination with a reducing agent, supported on a flexible carrier, the improvement which comprises increasing the effective working time of such bandage by providing in said bandage prior to or during polymerization thereof an alkaline earth metal salt, e.g. calcium sulfate. The copper containing compound may be cupric acetylacetonate. |
