B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/19
B29C 67/20 (2006.01) A61F 2/06 (2006.01) A61J 1/00 (2006.01) A61L 27/00 (2006.01) C08J 9/26 (2006.01) A61F 2/12 (2006.01)
Patent
CA 1323149
METHODS FOR FORMING HOLLOW, POROUS-SURFACED ELASTOMERIC BODIES Abstract A method of forming hollow, porous elastomeric bodies and hollow, dual-layered elastomeric bodies wherein one layer is porous and contiguous with the other layer which is solid by a) coating a surface of a mandrel with a coating liquid, b) adhering a layer of water-elutable particles onto the coated mandrel surface, c) applying a layer of fluid elastomeric composition to the particle-coated mandrel surface wherein the elastomeric composition is capable of forming a water-insoluble elastomer, d) causing said elastomeric composition to form a cohesive mass while in contact with the particle-coated mandrel surface, e) dissolving said elutable particles from the cohesive mass with a water-based solvent, and f) removing the cohesive mass from the mandrel. The coating liquid comprises water and may also further comprise a wetting agent and/or a sugar. The invention also relates to the method wherein the water- elutable particles are adhered to the mandrel surface by heating the mandrel surface. The method is useful or making prostheses, e.g., mammary prostheses ant vascular prostheses.
589865
Frisch Eldon E.
Dow Corning Wright Corporation
Frisch Eldon E.
Gowling Lafleur Henderson Llp
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