Patent ID: 7045563
Filing Date: 2006-05-16
Classification: D21H

Abstract:
1. An additive composition for paper making comprising as basic component, a starch which has had its molecular size reduced to provide a viscosity level of 10 to 400 mPas (5%, 60° C., Brookfield) and which has been cationized to a charge level of 0.36–2.5 mEq/g, as additional component, a polymer dispersion which has been prepared from components comprising: (a) from 5 to 50% based upon the dry matter of said dispersion of starch with a degree of substitution (DS) of 0.01 to 1 relative to at least one member selected from the group consisting of cationic and anionic substituents and having an intrinsic viscosity of >1.0 dl/g, when substituted, (b) from 50 to 95% based upon the dry matter of said dispersion of a monomer mixture containing at least one vinyl monomer and providing a polymer having a film formation temperature of −50 to 200° C.; and c) water.