配方类型:

COATINGS

配方说明:

Paperboard Coating

配方组成:

* Clay dispersion added to latex as 65% dispersion in water.
Formula No.
Clay/137.5
Clay*/37
Titanium Dioxide/62.5
Sodium Hexametaphosphate/0.2
Defoamer/15 drops
Latex/30
Water/to 68% total solids
Sodium Hydroxide/to pH 8.5
"Hycar" 1577/100
Ammonium Caseinate/2
Ammonium Caseinate/2
"Hycar" 1577/100

配制方法:

One half of the clay/TiO2 is added to the water/sodium hexametaphosphate/defoamer agitation in a Waring blender. The latex is then added, followed by the remaining clay/TiO2, and the pH is adjusted to 8.5 with 10% sodium hydroxide. This coating color at 68% total solids is agitated in the Waring blender at a Variac setting of 50. After 3 min in the blender, a portion of the coating color is removed and tested for viscosity, shear stability, and paper coating properties. Approximately 5 cc of the coating color is then washed through a 100-mesh screen as a coagulum check. The remainder of the coating color is agitated in the Waring blender with a Variac setting of 60 for an additional 27 min and checked again for coagulum.