Patents
A process for the preparation of hyperbranched polymers of diisopropenylbenzene or divinyl/benzene or its copolymers by mixing an initiator with diisopropenylbenzene or divinylbenzene monomer in a mole ratio of 1:1 to 1:0.4 in less than 2 seconds at 30°C to 40°C in an organic solvent, cooling the said mixture to -40°C to obtain a solution of hyperbranched polymer, optionally adding co-monomer equal to or higher than initiator moles periodically, terminating the said reaction with a small amount of degassed methanol and separating the hyperbranched polymer by conventional precipitation using a non-solvent.