Structural Changes of the Coating Layer by Styrene/AcrylateLatex with Hydroxyethyl Methacrylate

摘要

The coating structure is directlyrelated to quality of coatedpaper, especially printability. Its structure mainly consists of pigment,binder, and additives. Binder has a significant influence on the coatingstructure because it is involved in the structure forming processand takes a key role in maintaining the structure. In this study,styrene acrylate (S/A) latex with hydroxyethyl methacrylate (HEMA)as a comonomer was used as a binder, and the influence of HEMA contentson latex swelling and coating structure was investigated. The S/Alatex particle swelled more with an increasing HEMA content, whichsignificantly influenced coating color and coating layer characteristics.The viscosity of coating color became thick, and the dewatering ofcoating color was suppressed. The HEMA monomer that swelled latexparticle allowed the coating layer to consolidate rapidly, which madethe coating layer more porous and more uniform.