Abstract: The influences of mass fractions of Mg-Al MMH(w), temperature and electrolytes(NaCl, CaCl2 )on the rheology and thixotropy of Diflubenzuron SC were studied in this paper. It was found that the rheological behavior of Diflubenzuron SC coincided with the Herschel-Buckley rheological model, and the SC showed the property of rheogram “shear-thinning”of the pseudo-plasticity. Consistency index KH and yield value τH increased with the increase of w, and the SC displayed positive thixotropy when w reached a certain value; with the increase of temperature, KH and τH increased, but the property of rheogram “shear-thinning”of the pseudo-plasticity and positive thixotropy of the system were not changed. The electrolytes with various concentration exerted different effects on KH and τH, and the influences of CaCl2 were more significant than NaCl at the same concentration. The property of rheogram “shear-thinning” of the pseudo-plasticity and positive thixotropy of the SC added with electrolytes were not changed.

Key words: Diflubenzuron, Suspension concentrate, Mg-Al MMH, Rheology, Positive thixotropy