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Abstract

A dispersion of solvent-suspendible pressure sensitive adhesive particles, which comprises (A) pressure sensitive adhesive particles comprising an internally cross-linked copolymer and having a particle size of 5 to 200 microns and an organic solvent; the copolymer being prepared by copolymerizing (a) 2 to 10% by weight of at least one member selected from the group consisting of methyl acrylate, styrene and a methacrylate of alcohol having 1 to 5 carbon atoms, (b) 98 to 90% by weight of at least one member selected from the group consisting of a acrylate of alcohol having 2 to 12 carbon atoms and a methacrylate of alcohol having 6 to 12 carbon atoms; (c) 0.1 to 2.0% by weight of maleic anhydride, and (d) 0.05 to 1.0% by weight of at least one member selected from the group consisting of tetraallyloxyethane, triallyl cyanurate and triallyl isocyanurate and a dispersion of solvent-suspendible pressure sensitive adhesive particles prepared by dispersing 2 to 20 parts by weight (as sold matter) of a styrene-containing polymer having a styrene content of 5 to 70% by weight and having a particles size of 0.02 to 3 microns in a 100 parts by weight of the above dispersion, and the pressure sensitive adhesive sheet utilizing the above mentioned dispersions. The pressure sensitive adhesive sheet can be repeatedly adhered and removed. Moreover the pressure sensitive adhesive sheet does not cause the paper-tearing phenomenon nor the adhesive migration phenomenon in case the styrene containing emulsion is employed as a binder.

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