Patent ID: 9447195
Filing Date: 2016-09-20
CPC Classification: C08B,D06M

Claim Text:
1. A method for the heterogeneous modification of solid polysaccharide-based material comprising the steps of (ib) providing a solid polysaccharide-based material with terminal double or triple unsaturated hydrocarbon bonds; and (iib) bringing said terminal double or triple unsaturated hydrocarbon bonds to react with a molecule containing a terminal thiol group, wherein the solid polysaccharide-based material with double or triple unsaturated hydrocarbon bonds is provided by (i) providing a solid polysaccharide-based material; (ii) providing a modifying agent comprising double or triple unsaturated hydrocarbon bonds; (iii) optionally providing a catalyst which is an acid catalyst, or a nucleophilic catalyst; and (iv) reacting the solid polysaccharide-based material with the modifying agent, optionally in the presence of said catalyst, wherein the modifying agent comprising double or triple unsaturated hydrocarbon bonds is chosen from among acids, alkyl ketene dimers, acid chlorides, epoxides, alkoxysilanes, chlorosilanes, and anhydrides containing alkene or alkyne functionality.