COSMETIC PREPARATIONS BASED ON N-HYDROXYPROPYL CHITOSANS, N-HYDROXYPROPYL CHITOSANS, AND PROCESS FOR PREPARING THEM

摘要

Cosmetic compositions are disclosed, for the treatment of skin or hair, with a content of new N-hydroxypropyl-chitosan derivatives, composed of (a) 4 to 40 Mol-% units of Formula (I) (I) and (b) 60 to 96 Mol-% units of Formula (II) (II) wherein R1 and R2 are the same or different and are each hydrogen or the group with n being equal to an integer from 1 to 5, with the proviso that in at least 50% of the units (II), R1 and R2 are not simultaneously hydrogen, or the salts thereof; along with new N-hydroxypropyl-chitosan derivatives and their salts as well a a process for the production of these new compounds from propylene oxide and chitosan.