Polymer alloy blood compatible surface
Abstract
Abstract A blood contacting layer and a blood contacting interface consisting of a solvent cast polyurethane alloyed with a filler-free silicone rubber. In the above, the alloy interface comprises an interpenetrating polymer network consisting of polyurethane and filler-free silicone rubber at the molecular level. The process or method of making the layer consists of preheating a metal mold such as an aluminum mold and filling it with a wax. After the wax form is removed, polished and cleaned, it is dipped first in a filler-free silicone rubber which is cured. It is then dipped in segmented polyurethane with curing of 150° F. for about one hour to evaporate the polyurethane solvent. Multiple dips are utilized up to 5 or 7 for implementing the polyurethane. The form containing both silicone rubber and polyurethane is finally cured for a day or 24 hours at about 150° F. and the wax form is removed. Finally, the silicone rubber lining is removed, leaving the binary alloy blood contacting surfaced polyurethane sac.
Inventors
- 👤 William S. Pierce
- 👤 James H. Donachy
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
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