A polyurethane/acrylic hybrid dispersion comprising a polyurethane dispersion, acrylic monomers and ethylenically unsaturated phosphorus containing monomers. The weight ratio of the solid content of the polyurethane dispersion to the acrylic monomers and the ethylenically unsaturated phosphorus containing monomers is from 3:7 to 7:3. A process of making the polyurethane/acrylic hybrid dispersion.