Novel Nonionic Star Polymeric Stabilizer in Aqueous Dispersion Formulations
SourceA series of studies were conducted to evaluate the ability of a novel surface active nonionic star polymer to stabilize various aqueous dispersion formulations. Data developed within these studies indicated the polymer enabled these formulations to maintain consistent properties such as particle size distribution and dilution stability. In many instances, the star polymer outperformed the current benchmark technology composed of polymer pairs containing both AB and ABA block polymers. For herbicidal water emulsion formulations, the star polymer demonstrated considerable resistance to particle size growth where the same formulation using the ABA block polymer demonstrated substantial particle growth over the same time period. In herbicidal suspo-emulsion formulations, the star polymer was able to withstand freeze/thaw cycles and to resist particle size growth. The novel surface active star polymer structure was applied in a range of aqueous dispersions, providing flexibility in use along with offering considerable advantages in dispersion stability over the current benchmark polymeric stabilizer technology used in complex aqueous suspo-emulsion formulations.