Patent ID: 6585962
Filing Date: 2003-07-01
Classification: A01N,A61K,A61P,A61Q

Abstract:
A process for preserving a composition comprising:introducing into said composition at least one preserving agent chosen from polyamino acid derivatives of formula (I) and salts thereof, in which:X is chosen from O, S, NH and NRâ€³, wherein Râ€³ is chosen from saturated and unsaturated, linear and branched C1-6 hydrocarbon-based radicals; R1 is chosen from: (i) linear and branched, saturated and unsaturated C1-40 hydrocarbon-based radicals; (ii) radicals of the formula â€ƒwherein s is a number chosen from 0, 1, 2, 3 and 4; and R4 is chosen from hydrogen and radicals chosen from â€”NH2, â€”OH, â€”SH, â€”CHOHCH3, â€”CONH2, â€”NHâ€”C(NH2)&boxH;NH, â€”C6H5, â€”C6H4OH and (iii) radicals of the formula â€ƒwherein m is a number chosen from 3, 4 and 5; R2 is chosen from hydrogen; saturated and unsaturated, linear and branched C1-8 hydrocarbon-based radicals; and radicals chosen from â€”CH2C6H5, â€”CH2C6H4OH, â€”CH2OH, â€”CHOHCH3, â€”(CH2)tâ€”NH2, wherein t is a number chosen from 3 and 5; R3 is chosen from hydrogen and saturated and unsaturated, linear and branched C1-6 hydrocarbon-based radicals; and n is a number greater than 1 chosen such that the number average molecular weight of the polyamino acid derivative ranges from 100 to 200 000; wherein the repeating unit may be identical or different for the same derivative.