Patent ID: 11866520
Assignee: PHOSPHONICS LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 20:
21. A compound comprising a polysaccharide compound which is substantially insoluble in water at standard temperature and pressure selected from cellulose and starch having a backbone comprising more than 20 sugar moieties wherein at least one of the sugar moieties is derivatised at one or more of its hydroxyl groups with a ligand (L) bound to the sugar moiety by a sulphur atom wherein the ligand L is of formula
—S(O)a(C R1 R2)nX, wherein:
independently in each occurrence, R1 and 2 are selected from hydrogen, an optionally substituted, linear or branched C1-40-alkyl, C2-40-alkenyl or C2-40-alkynyl group, an aryl and a C1-40-alkylaryl group;
a is, independently in each occurrence, from 0 to 2;
n is 3 to 6; and
X is —S(O)a—Y wherein Y is a monovalent terminal group.