The invention relates to the technical field of
skin contact type solvent-based pressure-sensitive adhesives, in particular to a
solvent-based pressure-sensitive
adhesive and a preparation method thereof.The
solvent-based pressure-sensitive
adhesive is prepared from, by weight, 40-50% of a
monomer composition, 50-60% of an initiator and 50-60% of an
organic solvent; the initiator accounts for 0.05-0.5% of the weight of the
monomer composition; the
monomer composition is prepared from the following components in percentage by weight: 55 to 85 weight percent of soft monomer, 10 to 35 weight percent of hard monomer, 2 to 11 weight percent of
hydrophilic monomer, 0.05 to 1.5 weight percent of acid
functional monomer and 0.02 to 0.25 weight percent of
epoxy functional monomer. By controlling the content of the acid
functional monomer, the
acid value of the solvent type pressure-sensitive
adhesive can be relatively low, and meanwhile, the initiator is added in stages, so that the total residual amount of the monomer is effectively reduced, and the
sensitization is further effectively reduced. And by controlling the ratio of the soft monomer to the hard monomer, the stripping force and the retention force can be improved. And by adding the
hydrophilic monomer, the formation of a hydrophilic channel is promoted. By adding the
epoxy functional monomer, a moderate micro-crosslinked network can be formed, and the air permeability of the
dry glue layer is improved.