Metallic flake containing coating compositions having improved glamour

A method for producing aqueous metallic flake containing coating composition comprising:

• preparing a segmented copolymer comprising a graft copolymer, block copolymer or a combination thereof,
• wherein said graft copolymer is prepared by:
• polymerizing one or more ethylenically unsaturated monomers, one or more phosphate moiety reactive monomers and one or more nonionic macromonomers terminated with a polymerizable double bond to produce said graft copolymer having a hydrophobic segment with one or more nonionic hydrophilic segments attached at single terminal points thereto, said hydrophobic segment having one or more phosphate reactive moieties positioned thereon, said nonionic macromonomer being selected from the group consisting of polyethylene glycol monomethacrylate methyl ether, polypropylene glycol monomethacrylate methyl ether, polybutylene glycol monomethacrylate methyl ether, polyvinyl pyrolidone, polyoxazoline, and a combination thereof, and wherein a molar ratio of said hydrophobic segment to said nonionic hydrophilic segment in said graft copolymer varies in the range of from 96:4 to 4:96;
• wherein said block copolymer is prepared by:
• polymerizing one or more of nonionic monomers selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, vinyl pyrolidone, oxazoline and hydroxy ethyl (meth)acrylate, one or more phosphate moiety reactive monomers and one or more ethylenically unsaturated macromonomers to produce said block copolymer having a hydrophobic segment with one or two nonionic hydrophilic segments linearly attached thereto, said hydrophobic segment having one or more phosphate reactive moieties positioned thereon and wherein a molar ratio of said hydrophobic segment to said nonionic hydrophilic segment in said block copolymer varies in the range of from 96 4 to 4:96;
• contacting orthophosphoric acid, phosphorus pentoxide, a phosphorus compound containing —O—PO(OH)2 group, or a combination thereof with said segmented copolymer to provide said segmented copolymer with one or more said phosphate moieties thereon;
• neutralizing said phosphate moieties on said segmented copolymer by contacting with a neutralizing agent to produce a neutralized phosphated segmented copolymer;
• and
• mixing metal flakes with said neutralized phosphated segmented copolymer in an aqueous carrier to produce said aqueous metallic flake containing coating composition.