Composition for preparing urethane/urea block copolymers

Details Composition for preparing urethane/urea block copolymers Composition for preparing urethane/urea block copolymers

1977-10-25

1979-05-22

Cockeram, H. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252182, 260 308R, 260 308DS, 260 332R, 528 48, 528 79, 528906, C08K 515, C08G 1832, C08K 545, C08K 506

Patent

active

041558944

ABSTRACT:
The maximum concentration of specified sulfur-containing diamines that can be dissolved in polyols employed to prepare elastomeric urethane/urea block copolymers is significantly increased by the addition to said polyols of from 1 to 10% by weight of specified aprotic organic solvents containing oxygen, sulfur or both of these elements.

REFERENCES:
patent: 3499858 (1970-03-01), Strassel
patent: 3650993 (1972-03-01), Zocco et al.
patent: 3745203 (1973-07-01), Harper
patent: 3920617 (1975-11-01), Hirosawa et al.
patent: 3929730 (1975-12-01), Graefe et al.
patent: 3933692 (1976-01-01), Kuchlefsky et al.
patent: 3940371 (1976-02-01), Case
patent: 4017464 (1977-04-01), Kimball
patent: 4031049 (1977-06-01), Hirosawa et al.

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