| abstract |
Improved process for the preparation of aqueous emulsions of addition copolymers having functional groups to provide thermosetting capability via condensation. The process improvement resides in reducing the amount of unwanted premature condensation of the functional group. The process has two steps, one consisting of polymerizing a portion of the monomer reactants at a temperature not above 60 DEG C. if the functional group is present and the other of continuing the polymerization with the addition of the remaining monomer reactants at a temperature not above 60 DEG C. and at a pH in the range of from 1 to 7. The process is of use in producing improved thermosetting enamels. |