The so called relaxor materials are characterized by high permittivities in a broad temperature range. In the Arrhenius plot, the relaxation times follow a nonlinear curve, often described as a Vogel-Fulcher law, instead of a straight line. Cooling down from high temperatures relaxors exhibit no spontaneous polarization without applied field. Only in sufficiently high external fields a polarization appears. We present a model which derives typical relaxor characteristics from simple and plausible microscopic assumptions. The model is based on interacting charges which fluctuate thermally activated in double well potentials. The relaxor behavior can be achieved if the double wells have intrinsic asymmetries. Such intrinsic asymmetries are caused by disorder in the system. The electrostatic interaction between the charges is considered via a mean field approach according to Pierre Weiss. The interaction evokes an additional field which is proportional to the polarization. This field modifies the local fields at the double wells and in that way the transition rates of the charges which determine the polarization. So we get a feedback loop for the polarization. This model yields the typical relaxor features: we find high susceptibilities in a broad temperature range with dynamics following the Vogel-Fulcher law. In the framework of the model no spontaneous polarization arises at cooling without strong external field in accordance to experimental findings for relaxors. Furthermore the model yields hysteresis loops of the polarization which become more and more thin and deformed with increasing temperature.