Abstract
Macromonomers constituting of methyl methacrylate (MMA) and 2-hydroxyethyl methacrylate were radically copolymerized with MMA and styrene (St) at an azeotropic condition to obtain star-shaped polymers. With these polymers, the effect of branching on the viscosity of paints was discussed. It was confirmed that the solution viscosity of these star-shaped polymers at about 40% concentration was considerably lower than that of the corresponding linear polymers with the same molecular weights.
