| http://www.w3.org/ns/prov#value | - xycarbonyl; X and Z are each independently O or S; M+ is an alkali metal cation; and n is an integer such that the group ##STR6## has a molecular weight between about 3000 and about 25,000; reacting said anionic thermoplastic polymer with said polysaccharide-bearing nucleophilically displaceable groups under conditions conducive to nucleophilic displacement of said groups by said anionic polymer;
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