| abstract |
A derivatized graft polymer of a polysaccharide, a crosslinked graft polymer of a polysaccharide, and a derivatized and crosslinked graft polymer of a polysaccharide are prepared. The derivatized polymer has the structure Sacch-g-[(M-CH=N-Y)x-g-[(M)q]; the crosslinked polymer has the structure Sacch-g-[(M-CH=N)z-P]w-g-[(M)q] or Sacch-g-[(M-CH=C)z-P]w-g-[(M)q]; the derivatized and crosslinked polymer has the structure Sacch-g-[(M-CH=N-Y)x]-g-[(M-CH=N)-P]-g-[(M)q] or Sacch-g-[(M-CH=N-Y)x]-g-[(M-CH=C)z-P]w-g-[(M)q]. Sacch represents a polysaccharide such as starch, gum, or cellulose; g-represents a graft; M represents one or more ethylenically or allylically unsaturated monomers, at least one of which contains an acetal or aldehyde; P represents a multivalen residue from a reagent containing more than one primary amine group or ketone group; -N= represents the group formed when one primary amine group of P reacts with the acetal or aldehyde group of the monomer repecting unit M; 13 CH= represents the group formed when one of the ketone groups of P reacts with the acetal or aldehyde group of the monomer repeating unit M; x is at least 1; z is at least 2; w is at least 1; and q is 0 or greater. |