Aqueous coating compositions having improved transparency

Details Aqueous coating compositions having improved transparency Aqueous coating compositions having improved transparency

C - Chemistry, Metallurgy

09

C

C09C 3/10 (2006.01) C09C 1/24 (2006.01) C09D 5/02 (2006.01) C09D 5/29 (2006.01) C09D 17/00 (2006.01) C09D 133/14 (2006.01) C09D 133/26 (2006.01)

Patent

CA 2342253

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

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