Patent ID: 7494566
Filing Date: 2009-02-24
Classification: C08L,C09D,D21H

Abstract:
1. A method of increasing the strength of a cellulosic pulp product comprising: contacting wet cellulosic pulp with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function, the hydrophilic polymer and the saccharide of the composition having been reacted in a crosslinking reaction prior to contacting the composition with the cellulosic pulp product to increase the viscosity the composition ,the crosslinking reaction being substantially terminated by changing at least one reaction condition; and, after contacting the cellulosic pulp with the composition, causing the crosslinking reaction between the hydrophilic polymer and the saccharide of the composition to proceed further by providing reaction conditions suitable to cause the reaction to proceed further.