Stain blocking architectural compositions with cationic resin and nonionic resin blends

A paint composition comprising a blend of:

• a cationic latex resin and
• a substantially nonionic latex resin, wherein the substantially nonionic latex resin is polymerized from:
• a monomer mixture comprising at least one nonionic (meth)acrylate monomer, a polymerizable nonionic hydrophilic component, wherein the monomer mixture comprises less than 0.25 wt. % of acid monomer or other monomers with anionic groups, and
• a nonionic surfactant ranging from about 1 wt. % to about 4.5 wt. %, wherein a HLB value of the nonionic surfactant ranges from about 14 to about 18,
• wherein the polymerizable hydrophilic component is present from about 1 wt. % to about 5 wt. %,
• wherein the weight percentages are without water,
• wherein the polymerizable hydrophilic component comprises a polymerizable polyethylene glycol monomer or a polymerizable polypropylene glycol monomer.

A method for locking stains on a substrate from migrating to a paint film covering the substrate while minimizing adverse water sensitivity issues between the substrate and the paint film, wherein said method comprises the steps of

• i. blending a cationic resin with a nonionic resin to form a blended resin composition without forming grit or gel;
• ii. preparing a paint composition comprising the blended resin composition and an opacifying pigment;
• and
• iii. covering said substrate with the paint composition, wherein the paint composition dries and forms said paint film,
• wherein the acid monomer or other monomers with anionic groups are less than 0.25 wt. % of total monomer content.