Opacified latex paint containing plastic polymer particles

An aqueous latex dispersion paint composition which coalesces at an ambient coalescing temperature into a hardened paint film, said latex paint having about 30% to 70% by weight total solids and comprising on a dry solids volume basis:

• 25% to 70% of a film-forming latex binder having a major weight portion of polymer particles not smaller than 1,000 A and having a glass transition temperature at least about 5.degree. C. below said coalescing temperature whereby said binder particles will coalesce into a binding matrix, said latex binders being polymers and copolymers derived from ethylenically unsaturated monomers;
• 5% to 70% of solid, non-cellular, non-film-forming polymer particles having a weighted average diameter between about 1,000 A and 10,000 A and having a glass transition temperature at least about 25.degree. C. above said coalescing temperature and at least about 30.degree. C. above the glass transition temperature of said binder, said non-film-forming particles being polymerized organic liquids having carbon-to-carbon unsaturation;
• 5% to 30% opacifying pigment having a refractive index of at least about 1.8 and being a volumetric proportion less than the volumetric proportion of said non-film-forming polymer particles;
• 0% to 60% of extender and filler pigments other than said opacifying pigment;
• and
• said latex paint having a pigment-volume-content (PVC) greater than the critical-PVC (opacity) as measured by the lower break in the opacity curve, and said pigment-volume-content (PVC) being less than the critical surface porosity-PVC (enamel holdout) as measured by the upper break in the enamel holdout curve.

An aqueous latex dispersion paint composition which coalesces at an ambient coalescent temperature into a hardened paint film, said latex paint having about 30% to 70% by weight total solids and comprising on a dry solids volume basis:

• 25% to 70% of a film-forming latex binder having a major weight portion of polymer particles between about 1,000 A and 10,000 A and having a glass transition temperature at least about 5.degree. C. below said coalescing temperature whereby said binder particles will coalesce into a binding matrix, said latex binder being a polymer of a copolymer derived from ethylenically unsaturated monomers;
• 5% to 60% of solid, non-cellular, non-film-forming polymer particles having a weighted average diameter between about 1,000 A and 10,000 A and having a glass transition temperature at least about 30.degree. C. above the glass transition temperature of said binder, said non-film-forming particles being polymerized ethylenically unsaturated monomers having carbon-to-carbon unsaturation;
• 5% to 25% opacifying pigment having a refractive index of at least about 1.8;
• 0% to 60% of non-opacifying pigment;
• and
• said latex paint having a pigment-volume-content (PVC) greater than the critical -PVC (opacity) as measured by the lower break in the opacity curve, and said pigment-volume-content (PVC) being less than the critical surface porosity-PVC (enamel holdout) as measured by the upper break in the enamel holdout curve.