An aqueous composition comprising: (i) at least one first polymer in an amount in the range of from about 10 wt.% to about 90 wt.% derived from at least one first monomer selected from ethylenically substituted aromatic compounds and at least one second monomer selected from the group consisting of as (meth)acrylonitrile, (meth)acrylamide, (meth)acrylic acid, alkyl (meth)acrylates and mixtures thereof; and (ii) at least one second polymer in an amount in the range of from about 10 wt.% to about 90 wt.% comprising the reaction product of a partially neutralized, acid-functional support resin and at least one ethylenically-unsaturated monomer selected from the group consisting of olefins, mono vinylidene aromatics, alpha beta ethylenically-unsaturated carboxylic acids and esters thereof, ethylenically-unsaturated dicarboxylic anhydride and mixtures thereof; and wherein the wt.% in each case is based on the total weight of the aqueous composition, and wherein the ratio of volume average particle size diameter of the at least one first polymer to the volume average particle size diameter of the at least one second polymer is in the range of from about 20:1 to about 2:1, said volume average particle size diameters being measured as described in the experimental part herein, and wherein the at least one first monomer is different from the at least one second monomer. (i) at least one first polymer in an amount in the range of from about 10 wt.% to about 90 wt.% derived from at least one first monomer selected from ethylenically substituted aromatic compounds and at least one second monomer selected from the group consisting of as (meth)acrylonitrile, (meth)acrylamide, (meth)acrylic acid, alkyl (meth)acrylates and mixtures thereof; and (ii) at least one second polymer in an amount in the range of from about 10 wt.% to about 90 wt.% comprising the reaction product of a partially neutralized, acid-functional support resin and at least one ethylenically-unsaturated monomer selected from the group consisting of olefins, mono vinylidene aromatics, alpha beta ethylenically-unsaturated carboxylic acids and esters thereof, ethylenically-unsaturated dicarboxylic anhydride and mixtures thereof; and wherein the wt.% in each case is based on the total weight of the aqueous composition, and wherein the ratio of volume average particle size diameter of the at least one first polymer to the volume average particle size diameter of the at least one second polymer is in the range of from about 20:1 to about 2:1, said volume average particle size diameters being measured as described in the experimental part herein, and wherein the at least one first monomer is different from the at least one second monomer. wherein the wt.% in each case is based on the total weight of the aqueous composition, and wherein the ratio of volume average particle size diameter of the at least one first polymer to the volume average particle size diameter of the at least one second polymer is in the range of from about 20:1 to about 2:1, said volume average particle size diameters being measured as described in the experimental part herein, and wherein the at least one first monomer is different from the at least one second monomer.