TAMOL® 731A

Dispersant Activity

The dispersant activity of carboxyl-functional polymers is an important element of their ability to inhibit scale formation. The effectiveness of a polymeric dispersant is dependent on the particle to be dispersed, the medium in which it is being dispersed, and the chemical structure of the dispersant. A determination of Fluidity Point gives a general indication of the dispersant activity of a polymer. The Fluidity Point is determined by a titration method and is defined as the concentration of dispersant needed to achieve fluidity in a mass of particles in an aqueous system. The Fluidity Point is the minimum amount of dispersant that must be used to deflocculate the particles in the system.

Fluidity Point

TAMOL® 731A dispersant is exceptionally effective for stabilizing dilute iron oxide suspensions, as Table IV shows. In this study, a suspension containing 700 ppm of iron oxide (pH 7.5) was allowed to settle four hours. The turbidity of the uppermost layer was measured in a nephelometer. The higher the turbidity value, the greater the stability of the suspension and the more effective the dispersant. The result suggests that TAMOL® 731A dispersant should greatly reduce the tendency of iron oxide to form deposits from recirculated cooling and boiler feed waters.

TAMOL® 731A DISPersant have low viscosity at temperatures as low as 5°C and should present no handling problems at temperatures freezing, 

TAMOL® 731A is weakly surface-active and produces somewhat more foam than the other polymers; however, at low use levels, TAMOL® 731A should present no foaming problem. Table VI illustrates the effect of these polymers on the surface tension and the interfacial tension between water and a highly refined mineral oil.

Surface-Active Properties of TAMOL® 731A at 25°C

Store products in tightly closed original containers at temperatures recommended on the product label.