Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1979-11-07
1982-01-26
Derrington, James H.
Stock material or miscellaneous articles
Composite
Of polyamidoester
3 1, 3 14, 3 17, 128 1D, 128214R, 128348, 264255, 264305, B32B 2740
Patent
active
043129200
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.degree. 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.degree. F. and the wax form is removed. Finally, the silicone rubber lining is removed, leaving the binary alloy blood contacting surfaced polyurethane sac.
REFERENCES:
patent: 3246048 (1966-04-01), Haluska
patent: 3562352 (1971-02-01), Nyilas
patent: 4057595 (1977-11-01), Rauner
Ward et al., "Production of Biomedical Polymers, In Organometallic Polymers", 1978, Academic Press Inc., New York, pp. 219-229.
Kolobow et al., "Superior Blood Compatibility of Silicone Rubber Free of Silica Filler in the Membrane Lung", Trans. Amer. Soc. Artif. Int. Organs, 1974, vol. XX, pp. 269-277.
Boretos et al., "Surface and Bulk Characteristics of a Polyether Urethane for Artificial Hearts", In J. Biomed. Mater. Res., vol. 9, 1975, pp. 327-340.
Baier, "Key Events in blood Interactions at Nonphysiologic Interfaces-A Personal Primer", Artificial Organs, vol. 2, No. 4.
Wilkes, "Necessary Considerations for Selecting a Polymeric Material for Implanting with Emphasis on Polyurethane", Poly. Sci. & Tech., vol. 8, pp. 45-75
Donachy James H.
Pierce William S.
Derrington James H.
Roberts, Jr. John S.
The United States of America as represented by the Department of
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