Patent ID: 8785548

Claim:
A process comprising: continuously charging into a reactor a mixture comprising: about 20 wt % to about 80 wt % of a vinylic monomer, the vinylic monomer comprising a styrenic monomer, a (meth)acrylic monomer, or a mixture thereof; about 0.25 wt % to about 5 wt % of a polymerization initiator; and about 20 wt % to about 80 wt % of a reaction solvent; maintaining the reactor at a temperature of from about 120° C. to about 165° C. to produce an oligomer from the vinylic monomer; and isolating the oligomer; wherein: the oligomer has an insubstantial amount of olefinic unsaturation and a residence time of the oligomer in the reactor is from about 5 minutes to about 60 minutes.