Patent ID: 8629252

Claim:
Non-crosslinked derivatives soluble in water of oligo/polysaccharides having formula wherein: X is OH, O − M, NH—R 1 , O—R 1 ; M is an alkaline or alkaline-earth metal, transition metal, or cation containing a quaternary nitrogen atom; Y is H or R 2 ; R1 is the residue of an oligo/polysaccharide selected from chitosan, pullulan, carrageenan, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, or a glycosaminoglycan selected from hyaluronan, chondroitin sulphate, heparan sulphate, dermatan sulphate, and keratan sulphate; R2 is the residue of a C1-C4 linear chain aliphatic carboxylic acid or citric acid; with the proviso that only one X is NH—R1 or O—R1, while the other two X are present in acid (OH) or salified form (OM) having a degree of substitution in citrate ester between 0.01 and 1.00 with respect to the repetitive unit of the saccharide.