Long‐chain fatty ammonium quaternaries in papermaking

Abstract

A series of long-chain quaternary ammonium halogen esters (UKK-chemicals), quaternary dimethyl tallow epoxypropyl ammonium halogens (EPK1), quaternary ditallow methyl epoxypropyl ammonium halogens (EPK2), and EPK2 oligomers (EPK2P) were synthesized. At acidic, neutral, or slightly basic conditions, EPK1-, EPK2-, EPK2P-, and UKK-chemicals operate as cationic chemicals. They can be used, for example, as stock sizings, surface sizings, or fixatives. Stock sizing, surface sizing, and fixative experiments indicate that EPK1-, EPK2-, EPK2P-, and UKK-chemicals function at least as well as or better than the corresponding synthetic chemicals used in papermaking.Paper no. J10186 in JAOCS 79, 921-930 (September 2002).

Interactions of ink colourants with chemically modified paper surfaces concerning inkjet print improvement

“…Previous studies on the synthesis and use of new products in the surface sizing, namely, quaternary agents derived from fatty acids, led to positive results concerning the line and dot print quality comparatively to other synthetic agents. However, regarding colour reproduction, the results were not positive [16,21]. It was suggested that the low surface energy of the resultant papers, due to the aliphatic long chain molecules, allows the ink fixation on the paper surface, preventing the spreading and penetration, and thus yielding a good performance in terms of line and dot quality.…”