CHITOSAN-CONTAINING HYDROGEL PRODUCTION METHOD Russian patent published in 2009 - IPC A22C13/00 C08B37/08 

FIELD: food products.

SUBSTANCE: method proposed envisages blend of two solutions and the resultant compound degasation and polymerisation. The first solution production process envisages addition of water and ethylenediamine - N,N,N',N' - tetraacetic acid to chitosan or derivatives thereof, mechanical agitation of the resultant compound, further load of acid for pH to be 4.0, heating to produce a solution, load of alkali for deposition of a sediment, the sediment collection and distilled water flushing for pH to be 6.2, further successive load of acid for the sediment complete dissolution, alkali for pH to be 6.2 and acide for pH to be 5.6, centrifugation, distilled water addition and vacuum degasation of the solution thus produced. The second splution is produced by way of having distilled water, acid and sodium or potassium persulphate to N,N,N',N' - tetramethylethylenediamine.

EFFECT: combination of hydrogel plasticity properties with prophylactic and protective properties of chitosan or derivatives thereof to have been preserved after polymerisation.

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