Possible Methods of Recharging the Surfaces of Particles of Latexes Stabilized with Soaps

Abstract

1. It is shown that the surfaces of particles of a synthetic latex stabilized with soap can be recharged by acidification or by the addition of an aluminum salt. 2. It is established that a necessary condition for this recharging is a low-solids concentration in the latex, which makes it possible for the particles to be recharged without the formation of any considerable amount of coagulum. 3. The opinion is expressed that recharging by acidification occurs through the adsorption of positively charged hydrogen ions by the particles of the latex; recharging by the addition of aluminum salts is due to the formation of an amphoteric aluminum hydroxide which is adsorbed by the surfaces of the particles.