The present inventions relates to bioresorbable sealing powder comprising:



water-soluble electrophilic polymer carrying at least 3 reactive electrophilic groups that are capable of reacting with amine groups under the formation of a covalent bond;
water-soluble nucleophilic cross-linker carrying at least 2 reactive nucleophilic groups that, in the presence of water, are capable of reacting with the reactive electrophilic groups of the electrophilic polymer under the formation of a covalent bond between the electrophilic polymer and the nucleophilic cross-linker;
water-absorbing particles containing at least 50% by weight of said water-absorbing particles of water-insoluble polymer containing reactive nucleophilic groups; water-soluble dispersant that is solid at 20° C., said water-soluble dispersant being selected from monosaccharides, disaccharides, oligosaccharides, sugar alcohols and combinations thereof.

wherein the components (a), (b), (c) and (d) may be contained in the same particles or in different particles.





The invention also provides a method of preparing the aforementioned bioresorbable sealing powder
Further provided are (i) a device for powder application comprising the bioresorbable sealing powder, (ii) a biocompatible, flexible, hemostatic sheet comprising the bioresorbable sealing powder and (iii) a kit of parts for preparing a sealing suspension, said kit comprising the bioresorbable powder, and (iv) a sealing suspension containing the bioresorbable sealing powder.