| abstract |
An aqueous cleaning and disinfecting agent concentrate contains a combination of antimicrobial active substances A and B and/or C. A is obtained by reacting an N-substituted propylene diamine of formula (I): R1-NH-(CH¿2?)3-NH2, where R?1¿ stands for an alkyl group containing 8 to 18 carbon atoms, preferably 12 to 14 carbon atoms, with glutamic acid or glutamic acid derivatives of formula (II): R2-O-CO-(CH¿2?)2-CH(NH2)-COOH, where R?2¿ stands for hydrogen or an alkyl group with 1 to 4 carbon atoms, and possibly by reacting the product so obtained with ethylene oxide and/or propylene oxide and possible further reaction with organic or inorganic acids. B is a quaternary ammonium compound of formula (III), where R?3 and R4¿ independently stand for alkyl groups each containing 1 to 3 carbon atoms or benzyl groups, halogenated or alkylated benzyl groups, R?5 and R6¿ independently stand for alkyl and or benzyl or halogenated or alkylated benzyl groups each containing 6 to 22 carbon atoms and X- stands for an anion from the groups of the halides or the carboxylates. C is another antimicrobial active substance from the group of the phenols, biguanide compounds or the quaternary phosphonium compounds of formula (IV), where R?7, R8, R9 and R10¿ independently stand for alkyl, alkenyl, aryl or alkylaryl groups each containing 1 to 16 carbon atoms and Y- stands for an anion preferably from the groups of the halides or the carboxylates, in particular acetate or propionate. |