To prepare acrylic type pressure-sensitive adhesive, terpolymers were synthesized from butyl acrylate(BA), vinyl acetate(VA) and maleic anhydride(MA). These terpolymers were partially crosslinked by a hexamethylol melamine type agent(CL-K). The crosslinking was identified by IR and GPC. Molecular weight was measured by a valor pressure osmometer. To carry out terpolymerization, the amounts of MA and initiator were held constant, while the amounts of BA and VA were varied over 0.5-1.0 mole and 0.4-1.5 mole, respectively. At BA/VA mole ratio of 1 : 0.5(in case of BVM-3), polymerization for 8 hrs at 75℃ with AIBN as a catalyst gave the best results. Adhesive characteristics of the crosslinked BVM-3 (BVMC-2) were 900g/inch in peel strength, more than 24 hours of holding power, 14/32 for tackiness and 85℃ for heat resistance. BVMC-2 showed good balanced Properties as a Permanent pressure-sensitive adhesive. Although the crosslinked polymer exhibited good adhesive characteristics, the uncrosslinked one was not suitable for the pressure-sensitive adhesive.

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