Title:
BIODEGRADABLE, SUPER ABSORBENT POLYMER HYDROGELS AND A METHOD FOR THEIR PREPARATION
Document Type and Number:
WIPO Patent Application WO2006070337
Kind Code:
A9
Abstract:
The invention relates to a method for the preparation of a superabsorbent polymer hydrogel, comprising the steps of (i) crosslinking a 3% overall aqueous solution of carboxymethylcellulose sodium salt and hydroxyethylcellulose with 5% carbodiimide, in the presence of an acid catalyst; (ii) washing the gel obtained at least once by swelling in a polar organic solvent; and (iii) drying the gel by phase inversion in a non-solvent for cellulose. The invention further concerns the superabsorbent hydrogels obtainable by said method and the uses thereof .
Inventors:
AMBROSIO LUIGI (IT)
NICOLAIS LUIGI (IT)
SANNINO ALESSANDRO (IT)
NICOLAIS LUIGI (IT)
SANNINO ALESSANDRO (IT)
Application Number:
PCT/IB2005/054412
Publication Date:
June 21, 2007
Filing Date:
December 28, 2005
Export Citation:
Assignee:
AMBROSIO LUIGI (IT)
NICOLAIS LUIGI (IT)
SANNINO ALESSANDRO (IT)
NICOLAIS LUIGI (IT)
SANNINO ALESSANDRO (IT)
International Classes:
C08B15/00; A23L21/10; A23L29/20; C08B11/20; C08J3/075; C08J3/24; C08L1/28
Download PDF:
Previous Patent: A TRANSMISSION ELEMENT
Next Patent: INTERNAL COMBUSTION ENGINE AND STARTING METHOD THEREOF
Next Patent: INTERNAL COMBUSTION ENGINE AND STARTING METHOD THEREOF