Thermoplastic polyurethanes of mixtures of hard and soft thermop

Details Thermoplastic polyurethanes of mixtures of hard and soft thermop Thermoplastic polyurethanes of mixtures of hard and soft thermop

1974-12-09

1978-12-12

Bleutge, John C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08L 7504, C08L 7506, C08L 7508

Patent

active

041296117

ABSTRACT:
Thermoplastic poluyrethane polymers having improved physical properties over a wide temperature range are produced from a physical mixture of thermoplastic polymers of (a) from about 10 to about 90 percent of a soft polymer prepared from an organic isocyanate having an average functionality of about 2 and an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight greater than 200 at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.1/1, and (b) from about 90 to 10 percent of a hard polymer prepared by reacting at an NCO to active hydrogen ratio of from about 0.9/1 to about 1.2/1 an organic icocyanate having an average functionality of from about 1.90 to about 2.20 with an organic compound or compounds containing active hydrogen atoms and having an average functionality of about 2 and an average equivalent weight less than 100.

REFERENCES:
patent: 3012987 (1961-12-01), Ansul
patent: 3240842 (1966-03-01), Sauders
patent: 3284539 (1966-11-01), McElroy
patent: 3509232 (1970-04-01), Schollenberger
patent: 3542903 (1970-11-01), Congiundi et al.
patent: 3663513 (1972-05-01), Kazama et al.
patent: 3711571 (1973-01-01), Farah

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