Patent ID: 6872821

Claim:
A method of making paper having wet strength, temporary wet strength, and dry strength, the steps for making paper comprising: oxidizing polysaccharide in an aqueous solution with an oxidant having an equivalent oxidizing power of up to about 14.18 g of active chlorine per mole of polysaccharide anhydrosugar unit (“ASU”) and an effective mediating amount of a nitroxyl radical, carrying out the reaction at a temperature of at or less than about 15° C. and a pH of from about 8.0 to about 10.5, wherein the resulting polysaccharide aldehyde derivative has up to about 15 mole % of C-6 aldehyde groups per mole of polysaccharide ASU and aldehyde to carboxylic acid ratios of greater than or equal to 0.5 based on moles of polysaccharide ASU of each functionality, and adding as a strength aid to the paper an effective amount of the polysaccharide aldehyde derivative.