2 452______________________________________ american cyanamide butylated urea methylated melamine the zno pigment grinds are made first by making a cowles predispersion followed by a sandmill grind to a 7 8 hegman grind ______________________________________ingredient a b______________________________________ epoxy acrylic emulsion 300 300deionized water 122 122dimethyl ethanolamine 3 5 3 5butanol 22 22cymel 303 5 5 phenodur pr 307 5 5butyl cellosolve 5 525 carnauba wax emulsion 2 2zno grind 34 a 34 43 zno grind 34 b 34 43 solids u02dc 24 u02dc 24viscosity 4 ford 50 seconds 50 seconds zno on total solids u02dc 16 5 u02dc 16 5 ______________________________________ 30 solids 70 30 epoxy acrylic emulsion having u02dc 85 acid number low molecular weight gold colorant phenolic at 65 solids initial evaluation of 34 a 34 and 34 b 34 shows both having u02dc the same flexibility which is u02dc 50 wedge bend failure with a 5 6 mg sq inch film after lestt than 24 hours after preparation 34 b 34 begins to show 1 worse flexibility of u02dc 75 100 failure 2 a reduction in viscosity to about 30 seconds and 3 a grainy appearance due to pigment flocculation while 34 a 34 also shows somewhat similar results the flexibility does not worsen quite as much and as quickly both 34 a 34 and 34 b 34 eventually show heavy pigment settling which makes the material unsuitable for usage as well as the reduced.