The active principle then, the method of preparation, and its applications in pharmacy, in, or in the agri-foodstuffs

摘要

Cosmetic and/or dermatological ingredients of formula R1-T-S-V-R2, wherein R1 is a hydrocarbon radical corresponding to a first cosmetic and/or dermatological ingredient of formula R1(NH2)x (OH)z, wherein x and z are integers selected so that x + z /= 1; R2 is a hydrocarbon radical corresponding to a second cosmetic and/or dermatological ingredient of formula R2(NH2)r(OH)s(SH)t(COOH)u, wherein r, s, t and u are integers selected so that r + s + t + u /= 1; said first and second cosmetic and/or dermatological ingredients being from different families, and at least one of said first and second cosmetic and/or dermatological ingredients consisting of a protid, carbohydrate, lipid or nucleic acid; S is a radical corresponding to a bridging agent; T is at least one -NHCO- or -OCO- bond; and V is at least one -CONH-, -COO-, -COS-, -OOC- or -COOCO- bond. The use of such bifunctional ingredients, a preparation method therefor, and compositions containing same, particularly cosmetic and/or dermatological and emulsifying compositions, are also disclosed.