A process for the production of a pressure-sensitive adhesive composition
is provided comprising (1) forming an elastomer composition by mixing in
the form of a solution, 33.5 to 95% by weight of an aromatic
vinyl-isoprene block copolymer (a) having two or more poly(aromatic
vinyl) blocks, 0 to 47.5% by weight of an aromatic vinyl-isoprene diblock
copolymer (b), and 5 to 33% by weight of isoprene homopolymer (c) having
a weight average molecular weight of 20,000 to 100,000, wherein the
elastomer composition has a content of aromatic vinyl monomer unit of 14
to 50% by weight, (2) separating the elastomer composition from the
solvent, (3) drying the elastomer composition, and (4) blending a
petroleum resin with the elastomer composition made by steps (1)-(3),
wherein the amount of the petroleum resin is 10 to 500 parts by weight
based on 100 parts by weight of the elastomer composition.