NEW BIOACTIVE POLYMERS

Polycondensation products of aminoguanidine and/or 1,3-diaminoguanidine with one or more diamines are provided including polyguanidine derivatives of the following formula (I) or a salt thereof: wherein X is selected from -NH2, aminoguanidino and 1,3-diaminoguanidino; Y is selected from -H and -R1-NH2; or X and Y together represent a chemical bond to give a cyclic structure; R1 is selected from divalent organic radicals having 2 to 20 carbon atoms, in which optionally one or more carbon atoms are replaced by O or N; a and b are each 0 or 1, wherein a+b≠2 if no 1,3-diaminoguanidine units are included; R2 is selected from -H and -NH2, wherein R2 is -NH2 if a+b=0, R2 is -H or -NH2 if a+b=1, and R2 is -H if a+b=2; and n 2. Production methods and uses of the polyguanidine derivatives are also provided.