Process for preparing poly(.epsilon.-caprolactone) polyurethanes

Details Process for preparing poly(.epsilon.-caprolactone) polyurethanes Process for preparing poly(.epsilon.-caprolactone) polyurethanes

1976-01-19

1978-04-25

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 18TN, 260 75NB, 260 75NC, 260 75NE, 260 75NH, 260858, C08G 1842, C08G 1818, C08G 1822

Patent

active

040862143

ABSTRACT:
A process for the preparation of cast urethane rubbers by the reaction together of a diisocyanate, a polyol and a chain extender wherein the urethane is prepared by reacting together an isocyanate-rich quasi-prepolymer and an hydroxyl-rich prepolymer. The said quasi-prepolymer is formed by reacting all of the di-isocyanate with a part of the polyol and the said hydroxyl-rich prepolymer is formed by reacting all of the chain extender, the remaining part of the polyol and a part of the said quasi-prepolymer. The cast urethane rubbers find use in demanding applications like solid tires.

REFERENCES:
patent: 3666835 (1972-05-01), Schloss
patent: 3775354 (1973-11-01), Hostettler et al.

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