Patent ID: 8808849

Claim:
An aqueous slurry comprising a composite, wherein the composite comprises: (i) surface-phosphated inorganic pigment and/or filler microparticles having a spherical equivalent diameter of 0.3 μm to 100 μm as determined by the sedimentation method, wherein the inorganic pigment and/or filler microparticles comprise natural ground calcium carbonate, precipitated calcium carbonate, dolomite, or any mixture thereof; (ii) a nano alkaline earth carbonate composition at least partially coating the surface-phosphated inorganic pigment and/or filler microparticles, wherein ≧90% of particles of the nano alkaline earth carbonate composition, based on the number N of particles, have a spherical equivalent diameter of less than 200 nm as determined by the sedimentation method; and (iii) a binder that facilitates coating of the surface-phosphated inorganic pigment and/or filler microparticles with the nano alkaline earth carbonate composition, wherein the binder is a copolymer comprising one or more dicarboxylic acids; one or more diamines, triamines, dialkanolamines or trialkanoalmines; and epichlorohydrin.