* Sulfuric acid, nitric acid, phosphoric acid, O chwangsan, hydrofluoric acid, silicic acid and dew acid, having a carbon number less than 50, preferably at amino acid, an organic acid having an organic dew acid, vicar dicarboxylic based strong acid functional group is less than a carbon number of 25, pKa 5 or less, preferably 3 or lower organic carboxylic acid; * A precursor of said acid; - a salt of salt of said acid, and an amino acid similar or different amino acid (acids) and in use; - a salt of a polyimide derived from a salt of the acid, and the amino acid and similar amino acid, or on a different certificate cheukhap of one member in use; * Hydrochloride and its precursors; * If sanil other than the amino acid glutamic acid is the sum enlargement, hydrochloride, and salts of amino acids and amino acids using similar or different; - salts of hydrochloride, and similar to the amino acid used or derived from the different additions by at least one amino acid polyimides; * Changsan, phosphoric acid or phosphorous acid or a friend sanseongyeom material; * Anhydrous phosphoric acid or phosphoric acid precursors other than the polyphosphate; And * San Luis From after the polycondensation of amino acids on the one member, characterized by carrying out the thermal expansion must process and the acid catalyst / amino acid molar ratio in the presence of an acid catalyst on a selected one kind to 0.001 by optionally hydrolyzing or more biodegradability of 80%, polyimides method for producing a mid-water or decomposition of his polypeptide singer. Detergent compositions for oil also the polyimide or application and the mid pont riyi or hydrolysis of the water in the detergent compositions of his polypeptide hydrolyzate so obtained.