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US 2006/0142560 A1Published application
Sulfoalkylated cellulose
OwnerWolfgang Glasser, Alena Michalekinventors
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Abstract
Sulfoalkylated cellulose having superabsorbent properties and methods for making sulfoalkylated cellulose.
Claims18
Sulfoalkylated cellulose, comprising cellulose substituted with ethyl sulfonate groups and 2-hydroxypropyl sulfonate groups.
Sulfoalkylated cellulose, comprising cellulose treated with (a) a haloethyl sulfonate or vinyl sulfonate and (b) a 3-halo-2-hydroxypropyl sulfonate.
A method for making sulfoalkylated cellulose, comprising,
- (a) treating cellulose with alkali to provide alkali cellulose;
- (b) treating the alkali cellulose with a first sulfoalkylating agent to provide a first sulfoalkylated cellulose;
- (c) treating the first sulfoalkylated cellulose with a second sulfoalkylating agent to provide a second sulfoalkylated cellulose;
- and
- (d) isolating the second sulfoalkylated cellulose to provide sulfoalkylated cellulose.
2 more elements
Dependencies are inferred from the claim text.