Optimizing practical properties of MMA-based cold plastic road marking paints using mixture experimental design

摘要

In this study, some practical properties of methyl methacrylate (MMA)-based cold plastic traffic paints were optimized. For this purpose, in the first step, the effect of initiator, benzoyl peroxide (BPO) content on the polymerization of MMA-based traffic paints was evaluated. No-pick-up time, pendulum hardness, tensile strength and color difference (Delta E-w) before and after exposure to the accelerated weathering conditions (AWC) of the samples containing various BPO wt% (0.5, 1.0, 1.5 and 2.0) were determined. In the second step, the MMAbased paint formulation was optimized using mixture experimental design (MED). The amounts of MMA resin, chlorinated paraffin wax (plasticizer) and silica fillers with different average particle sizes were considered as the variables in the paint formulations. Viscosity, reflectance, color difference (Delta E-w) before and after exposure to AWC, skid resistance, and dirt pick-up property were selected as the practical properties and responses in the MED. The region of optimum paint formulations was determined using the quadratic model and selecting the desired end-use properties. The accuracy of the model was evaluated, and the results confirmed an appropriate agreement between the proposed model and experimental measurements.