Patent ID: 6620295
Filing Date: 2003-09-16
Classification: C08B,D21H

Abstract:
A method of making a paper sheet comprising the steps of: (a) forming an aqueous suspension of papermaking fibers; (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web; and (c) dewatering and drying the web to form a paper sheet, wherein a modified polysaccharide is added to the aqueous suspension, said modified polysaccharide having the following structure:â€”Polysacâ€”Z3R1â€”Polysacâ€”wherePolysac=a polysaccharide, monosaccharide or sugar residue; Z3=a bridging radical which serves to attach the R1 group to the Polysac residue; and R1=an organofunctional group containing a moiety consisting of an amphiphilic hydrocarbon having a carbon chain length of 4 or greater.