Process for increasing molecular weight of a polymer

A process for preparing an adhesive from copolymers A and B, the composition comprising:

• (A) from about 5 to about 95 parts by weight of an addition copolymer having a Tg in the range of from 0.degree. to -85.degree. C. comprising:
• 1. from about 85 to 99.5 parts by weight of a monomer or monomers selected from alkyl (C.sub.2 -18) or alkoxyalkyl acrylate and
• 2. from about 0.5 to about 15 parts by weight of an ethylenically unsaturated amine, carboxylic acid, sulfonic acid, or mixtures thereof, with
• B. from about 5 to about 95 parts by weight of an addition copolymer having a Tg in the range of from about 20.degree. to 150.degree. C. comprising:
• 1. from about 85 to about 99.5 parts by weight of a monomer or monomers selected from a monomer of the formula:
• ##STR4## wherein R is hydrogen or methyl and R.sup.1 is lower alkyl, lower cycloalkyl or isobornyl and
• 2.