MODIFIED CHITINS AND CHITOSANS, PROCESS OF THEIR PREPARATION, MATERIALS FOR COVERING WOUNDS, COATINGS, CARRIERS AND COSMETIC ADMIXTURES CONTAINING THEREOF

摘要

Modified chitins and chitosines with repeating units of formula I wherein R is -NH.sub.2.n., -NHCOCH.sub.3. On R`, with the remainder R` present in at least 30% of the repeating units and R c represents at least 90% of the group of formula II. Due to their biological properties, these materials are useful in medical and cosmetic applications, in particular as a means of covering surgical and traumatological wounds.