A water dispersible sulfopolymer for use as a material in the layer-wise additive manufacture of a 3D part made of a non water dispersible polymer wherein the water dispersible polymer is a reaction product of a metal sulfo monomer, the water dispersible sulfo-polymer being dispersible in water resulting in separation of the water dispersible polymer from the 3D part made of the non water dispersible polymer.

Methods of enhancing adhesion of an ink layer to a surface of a substrate, and composite articles formed through the methods, are provided. The methods comprise applying a primer composition to the surface to form a primer layer disposed on the substrate. The primer composition comprises a first polymer comprising a repeating unit, wherein the repeating unit comprises a localized negatively charged dipole having a local dipole moment of greater than 2 debyes, and wherein the repeating unit comprises no localized positively charged dipole having a local dipole moment of greater than 0.8 debyes; and a second polymer comprising a repeating unit comprising a tertiary amine group, wherein the second polymer is a branched polymer having a branch with a primary amine group that is pendant from the backbone of the polymer. The weight ratio of the first polymer to the second polymer is from about 19:1 to about 1:9.