By Patrick Vermette
The authors of this publication speak about polyurethanes utilized in various biomedical purposes. Polyurethanes shape a wide relations of polymeric fabrics with a tremendous variety of chemical compositions and houses the wide variety of homes that may be completed with polyurethane chemistry has attracted the eye of builders of biomedical units who see promise within the mechanical flexibility of those fabrics mixed with their excessive tear energy.
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Additional info for Biomedical Applications of Polyurethanes (Tissue Engineering Intelligence Unit)
Volcrêpe Ltd. , and Lockheed Aircraft Corp. developed, in the period of 1946-48, techniques for the production of rigid foam similar to the Bayer systems. Interest in isocyanates and polyurethanes grew gradually in the United States with the introduction of PU elastomers (1950) and flexible foams (1952) by Bayer. In their early years, polyurethanes were characterized by their good properties but high prices. The arrival of flexible polyurethane foams with high strength and low densities insured large-scale production of PU materials and their precursors.
To introduce this system and other PU technologies to the American market, Bayer and Monsanto joined together in 1954 to form the Mobay Chemical Company. 1. 1 Polyester-urethane foam used in breast implant by Pangman. F. F. 137 Biomer™ (Lycra® T-126) researched by J. W. 49 Second generation of polyurethane. 17 Thermoplastic extrudable polyether-urethane Tecoflex® patented by Szycher. 64,65 Elast-eon™ family developed by Elastomedics Pty Ltd (see Chapter 6). Commercial Production of Polyurethanes 25 Developments in coatings, elastomers, and adhesive materials, using polyesters as the principal flexible component or soft segment, were therefore gradually introduced.
Lamba N, Woodhouse K, Cooper S. Polyurethanes in Biomedical Applications. Boca Raton: CRC Press LLC, 1998. 6. Oertel G. Polyurethane Handbook. ) Hanser and Gardner Publications Inc, 1993. 7. Schollenberger C. Polyurethane thermoplastics. In: Bruins PF, ed. Polyurethane Technology. New York: John Wiley & Sons, 1969: 197-214. 8. Blackwell J, Lee C. Hard-segment polymorphism in MDI/diol-based polyurethane elastomers. J Polym Sci, Polym Edn 1984; 22:759-772. 9. Coury A, Slaikeu P, Cahalan P et al. Factors and interactions affecting the performance of polyurethane elastomers in medical devices.
Biomedical Applications of Polyurethanes (Tissue Engineering Intelligence Unit) by Patrick Vermette