Date of Award
Master of Science
Paper Engineering, Chemical Engineering and Imaging
James E. Kline
Dr. David K. Peterson
Masters Thesis-Open Access
Five polyacrylate samples were used to study their effects on coating color rheology, water holding and runnability. The Cylindrical Laboratory Coater was used to apply the coatings and study the runnability of the coating colors. The healing tendencies of the coatings were studied by inducing a scratch under the blade. The higher acid level and degree of crosslinking of the polyacrylate gave higher viscosity and the higher acid level also gave higher water retention. Coating colors containing polyacrylates were less prone to dilatancy at high shear. The addition of polyacrylate reduced the healing of coating colors, but for the same amount of polyacrylate, higher viscosity gave higher healing. Coated paper gloss and smoothness decreased with the increase in the amount of polyacrylate and showed good correlation with high shear viscosity. At lower solids, coating colors with higher viscosity showed coating skips. At higher solids the streaking tendency was more prominent and the gloss dropped drastically at the highest solids level.
Nath, Shambhu, "Effect of Poly Acrylate Addition on Coating Color Rheology, Water Retention and Coating Performance" (1994). Masters Theses. 5315.