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Fujimoto Yasuo, Teranishi Masayuki: Polyamino acid derivatives and compositions containing same. November 5, 1974: US3846380 (103 worldwide citation)

Polyamino acid derivatives having hydrophobic and hydrophilic substituents in their side chains are prepared by reacting a polyimide with at least one primary or secondary aliphatic amine and hydrolyzing the resulting polyimide derivative with alkali. The polyamino acid derivatives are useful as sur ...


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