Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-04-29
1977-12-13
Welsh, M. J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 775AM, 260 775AT, C08G 1832
Patent
active
040628345
ABSTRACT:
Melt extrudable thermoplastic polytetramethylene ether polyurethane-urea elastomers of this invention are prepared by reacting a tetramethylene ether glycol with 4,4'-diphenyl methane diisocyanate to form a polytetramethylene ether polyurethane pre-polymer having a number average molecular weight of from about 2,000 to about 10,000. This pre-polymer is water extended to form a thermoplastic bio-compatible elastomer having a number average molecular weight of about 50,000 to about 100,000, and a weight average molecular weight of about 300,000 to about 1,000,000. The elastomer so obtained has a softening point in the range of 127.degree. - 149.degree. C. and may be melt extruded without decomposition to produce articles useful in the field of medicine and surgery.
REFERENCES:
patent: 2830037 (1958-04-01), Carter
patent: 2901467 (1959-08-01), Croco
patent: 2929800 (1960-03-01), Hill
patent: 2929804 (1960-03-01), Steuber
patent: 3077006 (1963-02-01), Ibrahim
patent: 3428711 (1969-02-01), Hunt
patent: 3635907 (1972-01-01), Schulze et al.
patent: 3752786 (1973-08-01), Rossitto et al.
Gilding Denis Keith
Taylor, Jr. John Albert
Eberhardt Wayne R.
Ethicon Inc.
Welsh M. J.
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