Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-02-24
1976-09-14
Cockeram, H.S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
152357A, 156110R, 156110CL, 156128N, 260 318M, 260 775AP, 260 775AM, 260858, C08K 512, C08G 1848, C08G 1832
Patent
active
039806065
ABSTRACT:
Polyurethane elastomers having prolonged flex life are prepared by reacting a diisocyanate with polypropylene glycol (PPG) or triol and poly(tetramethylene ether) glycol (PTEG). The diisocyanate may be reacted with each glycol separately or they may be mixed before the reaction. A smaller amount of the prepolymer obtained from the polypropylene glycol or triol is mixed with a larger amount of the prepolymer obtained from the poly(tetramethylene ether) glycol and the mixture is reacted with a hindered aromatic diamine. Elastomers cured from the resulting mixed polyurethane were found to have an exceptionally high flex life and are particularly useful in the production of products which undergo dynamic flexing, as in the preparation of pneumatic tires, particularly the sidewalls thereof, because of their exceptionally long flex life.
REFERENCES:
patent: 2866774 (1958-12-01), Price
patent: 3164572 (1965-01-01), Axelrood
patent: 3701374 (1972-10-01), McGillvary
patent: 3755261 (1973-08-01), Van Gulick
patent: 3891606 (1975-06-01), Kogon
patent: R28424 (1975-05-01), McGillvary
Cockeram H.S.
The Firestone Tire & Rubber & Company
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