Patent ID: 6372088
Filing Date: 2002-04-16
Classification: D21H

Abstract:
A process of making paper comprising:a) forming an aqueous papermaking suspension comprising pulp fibres, fines and papermaking additives in an aqueous vehicle; b) adding a retention aid to the suspension, c) draining the suspension through a screen to form a sheet; and d) drying the sheet; said retention aid comprising a poly(oxyethylene) having a molecular weight of at least 106 and an aromatic resin cofactor for said poly(oxyethylene); said aromatic resin cofactor being derived from an aromatic resin having aryl alcohol groups of formula: â€”Arâ€”OH â€ƒand aryloxy groups of formula: â€”Arâ€”Oâ€”â€ƒwhereinAr is an arylene group selected from unsubstituted or substituted phenylene and naphthylene; said aryloxy groups comprising 1 to 15 molar %, based on the total of aryl alcohol and aryloxy groups, which is insoluble or sparingly soluble in said aqueous vehicle and modified to enhance the solubility in the aqueous vehicle.