AQUEOUS COATING COMPOSITIONS HAVING IMPROVED TRANSAQUEOUS COATING COMPOSITIONS HAVING IMPROVED TRANSPARENCY PARENCY

摘要

An aqueous coating composition having improved transparency and reduced haze containing: (a) an aqueous carrier medium; (b) transparent iron oxide pigment particles stabilized by (c) a mixture of acrylic copolymer pigment dispersants of (i) an acrylic copolymer dispersant having a hydrophilic stabilizing segment and a hydrophobic adsorbing segment having acid groups attached thereto; and (ii) an acrylic copolymer dispersant having a hydrophilic stabilizing segment and a hydrophobic adsorbing segment having phosphate groups attached thereto; and (iii) an acrylic copolymer dispersant having a hydrophilic stabilizing segment and a hydrophobic adsorbing segment having alkyl amino groups and preferably benzyl groups attached thereto; (d) a film forming polymeric binder; and (e) a crosslinking agent for the binder. Pigment dispersions of the forgoing acrylic copolymer dispersant combination and process for forming the dispersions also are part of this invention. 28