Crosslinked products of biopolymers containing amino groups
AssigneeMerck Patent Gesellschaft
InventorBerthold Nies
Life of this patent
Estimating the term…
Abstract
The invention relates to cross linked products of chitosan or gelatin and of a carboxylic acid di- or polyanhydride. These products form hydrogels with a wide variety of applications, preferably in the medical/pharmaceutical sector.
Claims12
In a pharmaceutical composition comprising an active ingredient and a pharmaceutically acceptable carrier, the improvement wherein the carrier comprises a cross linked product of chitosan obtained by reacting chitosan with a carboxylic acid dianhydride or carboxylic acid polyanhydride.
In a pharmaceutical capsule comprising an active ingredient and a support material, the improvement wherein the support material comprises a cross linked product of chitosan, obtained by reacting chitosan with a carboxylic acid dianhydride or carboxylic acid polyanhydride.
In a medical implant, the improvement wherein the implant comprises a cross linked product of chitosan, obtained by reacting chitosan with a carboxylic acid dianhydride or carboxylic acid polyanhydride.
In a suture material, the improvement wherein the suture material comprises a cross linked product of chitosan, obtained by reacting chitosan with a carboxylic acid dianhydride or carboxylic acid polyanhydride.
In a wound covering, the improvement wherein the wound covering comprises a cross linked product of chitosan, obtained by reacting chitosan with a carboxylic acid dianhydride or carboxylic acid polyanhydride.
Dependencies are inferred from the claim text.