Patent ID: 6476170
Filing Date: 2002-11-05
Classification: C08F

Abstract:
An acrylic resin produced by the process comprising the steps of:(a) charging into a continuous tube reactor, a feedstock comprising at least one acrylic monomer and a polymerization initiator; (b) maintaining a flow rate through the reactor sufficient to provide a residence time of the feedstock in the reactor of about one minute to about one hour; (c) maintaining a pressure of about 80 psig to about 500 psig; (d) maintaining the resulting molten resin mixture with a heat transfer medium at a temperature of about 180Â° C. to about 260Â° C.; and (e) devolatilizing the molten resin mixture exiting the reactor to remove unreacted monomer to provide an acrylic resin upon cooling; the acrylic resin having an acid value of 242 to 395, a glass transition temperature of 89Â° C. to 129Â° C., and being substantially solvent free.