POLYMER HYDROGELS AND METHODS OF PREPARATION THEREOF
Abstract
The invention relates to a method for the preparation of a superabsorbent polymer hydrogel, comprising crosslinking a precursor comprising a carboxymethylcellulose salt optionally in combination with hydroxyethylcellulose, using citric acid as the crosslinking. agent and in the presence of a molecular spacer, subsequently washing the gel in a polar organic solvent and finally drying the gel by phase inversion in a non-solvent for cellulose. The invention further concerns the superabsorbent hydrogel obtainable by the method of the invention and the use thereof in a number of different applications.
Classe Tecnologica
A - Human Necessities
Patent Office
United States Patent and Trademark Office
Numero Deposito
US2010234233
Anno Deposito
2007
Anno Concessione
2010
Inventori Pugliesi
Tutti gli inventori
- Alessandro Sannino
- Luigi Ambrosio
- Luigi Nicolais
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