Patent ID: 9499918
Filing Date: 2016-11-22
CPC Classification: C09D,C25D,E03B,F16L

Claim Text:
1. A method comprising applying by electrodeposition a coating composition to a segment of cast iron pipe pretreated with zinc phosphate to form a coating thereon and curing the coating, wherein the coating composition comprises: a (meth)acrylic polymer dispersed in aqueous dispersion medium prepared by polymerizing in the presence of a cationic salt group containing polymeric dispersant a polymerizable ethylenically unsaturated monomer composition comprising a mixture of ethylenically unsaturated monomers at least one of which contains at least two ethylenically unsaturated groups per molecule and which is free of amido groups; (ii) an electrodepositable cationic resinous vehicle containing active hydrogen groups; and (iii) a curing agent reactive with the active hydrogen groups; and wherein the cured coating has less than 1 millimeter scribe creepage after exposure to a salt spray environment for 2000 hours in accordance with ASTM B117 and in which the cured coating exhibits no coating loss when subject to Tape Adhesion Testing.