PURPOSE: To obtain an adhesive used for foams and being excellent in adhesiveness to urethane foams at high temperatures, and initial tack and adhesiveness to polyolefins by mixing an acrylic resin with an epoxy rosin in a specified ratio.

CONSTITUTION: 100 pts.wt acrylic resin is mixed with 1-30 pts.wt. epoxy rosin. Examples of the constituents of the acrylic resin include the soft main monomer component of a high glass transition temperature (e.g. ethyl acrylate), a hard comonomer component of a low glass transition temperature (e.g. methyl acrylate) and optionally a small amount of a functional-group-containing monomer component (e.g. acrylic acid). It is desirable that the epoxy rosin has an epoxy equivalent of 300-600 and a molecular weight of about 200-800. Rosins to be epoxidized are not particularly limited and include gum rosin and tall oil rosin. A method of applying the pressure-sensitive adhesive consists of applying a solution of a resin solid content of 40-50wt.% to a release paper and transferring the adhesive after drying.