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Title: Method of making gels based on biologically produced polysaccharides

Abstract: Gels are prepared from a biologically produced beta-1,3-glucan-type polysaccharide by exposing a basic solution of the polysaccharide to an atmosphere of a gaseous acid anhydride.


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Inventors: Towle, Gordon A. (Landenberg, PA, US)

Application Number: 580262
Filing Date: 1975-05-23
Publication_date: 1977-03-15
Assignee: Hercules Incorporated (Wilmington, DE)
Primary Class(es): 516/107 424/76.3, 424/479, 426/573, 426/660, 514/777
Other Classes:
US Patent Ref:
2253297Aug, 1941Houghton et al.252/316.
3684733Aug, 1972Bannister et al.252/316.
3822250Jul, 1974Kimura et al.260/209.

Other Refs:
Primary Examiner: Lovering, Richard D.
Assistant Examiner:
Attorney: Alexander; William S.