| http://www.w3.org/ns/prov#value | - Specific examples of superabsorbent materials include but are not limited to the reaction product at elevated temperature and pressure of hydrolyzed starch polyacrylonitrile graft copolymer, optionally having added thereto a polyhydric alcohol such as glycerol (see, U.S. Pat. Nos. 4,467,012 and 4,412,036 to Pedersen et al.), a polymer network of a crosslinked polyurethane that is prepared from an
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