Polyurethanes based on amino-acids or derivatives thereof

Details Polyurethanes based on amino-acids or derivatives thereof Polyurethanes based on amino-acids or derivatives thereof

1973-08-29

1976-01-13

Cockeram, H. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 775AT, 260858, 428423, 428425, 428901, B32B 2740, C08G 1830, C08G 1864

Patent

active

039323595

ABSTRACT:
Amino acid-urethane copolymers improved in elongation, tensile strength and flexing endurance are prepared by polymerizing a prepolymer having terminal isocyanate groups, obtained by reacting a polyether polyol having hydroxyl groups substantially at the terminals thereof with an organic polyisocyanate in a ratio in equivalent of the organic polyisocyanate to the polyether polyol of 1.6 to 2.5, either with an amino acid-N-carboxylic acid anhydride or with a polyamino acid polymer obtained by polymerizing an amino acid-N-carboxylic acid anhydride.

REFERENCES:
patent: 3488324 (1970-01-01), Garber et al.
patent: 3634544 (1972-01-01), Takeda et al.
patent: 3655628 (1972-04-01), Uchida et al.
patent: 3725353 (1973-04-01), Fujimoto et al.
patent: 3761451 (1973-09-01), Fujimoto et al.

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