Quick-drying, protective coating of papers with poly(methacrylate) latices containing alkali-hydrolysable emulsifiers

Abstract

Surfaces of filter papers pretreated with sodium carbonate were coated with poly(methacrylate) latices containing alkali-hydrolysable or non-hydrolysable cationic emulsifiers by a simple drop-coating method and their surface properties were investigated.Determination of fixed amounts of polymers and observation of the paper surfaces suggest that glass transition temperature of the polymers and hydrolysability of the emulsifier are dominant factors for the coating. The latices of poly(2-ethylhexyl methacrylate) containing the hydrolysable emulsifier could coat the paper surface almost perfectly and smoothly, making it quick drying and water repellent.

Hydrolyzable‐emulsifier‐containing polymer latices as dispersants and binders for waterborne carbon black paint

“…By modification of the previous coating method, the CB‐dispersed latex solution was spot loaded on the filter paper pretreated with Na 2 CO 3 . On the basis of the result that the paper surface coated with C 14 B‐containing latices dried immediately after the coating process and became water repellent, the CB‐loaded paper was rinsed with water and air‐dried in the same manner, although these processes are unnecessary for the practical uses of paints. At room temperature, unfortunately, CB could not be fixed on the paper surface in several minutes, and most of the CB was desorbed easily by rinsing, and this gave a dirty and smeared surface.…”

“…The average diameter of the particles dispersed in an aqueous surfactant solution determined by dynamic light scattering was about 200 nm. All of the other chemicals were those reported previously or commercially available. St, butyl methacrylate, and butyl acrylate (BA), purchased from Tokyo Kasei (Tokyo, Japan), were distilled under reduced pressure before use.…”

“…We succeeded in the preparation of perfectly surfactant‐free styrene (St) and (meth)acrylate polymers by conventional emulsion polymerization using an alkali‐hydrolyzable cationic emulsifier, (1‐tetradecyloxycarbonylmethyl)trimethyl ammonium chloride (C 14 B), followed by hydrolysis under mild conditions . We also demonstrated that the surface of filter paper pretreated with dilute aqueous Na 2 CO 3 can be polymer‐coated rapidly with the previous polymer latices at room temperature and that the surface immediately becomes water‐repellent . The facile hydrolysis of C 14 B in the latices has been presumed to induce the coalescence of latex particles and their adhesion to the paper surface.…”