화학공학소재연구정보센터
Journal of Adhesion Science and Technology, Vol.9, No.7, 899-905, 1995
EFFECT OF MONOMER CONCENTRATION ON THE ADHESIVE PROPERTIES OF ACRYLIC PRESSURE-SENSITIVE ADHESIVES
2-Ethylhexyl acrylate (2-EHA)-based co- and terpolymers were synthesized using n-butyl methacrylate (nBMA) and acrylic acid (AA) as comonomers. The change in adhesive properties with the change in monomer concentration was studied. The adhesive, cohesive, and tack characteristics were evaluated under standard conditions as specified by ASTM and/or the Pressure-Sensitive Tape Council (PSTC). The 2-EHA-co-nBMA copolymers showed a good balance between these three characteristics at 50% concentration of 2-EHA. It is noteworthy that with the AA concentration at or above 30% in 2-EKA-co-AA, the polyacrylates lose the tack which is necessary for adhesive bond formation. The 2-EHA-co-AA-co-nBMA terpolymers, where the 2-EHA content was kept constant at 50% and the AA content was varied from 1% to 10% with a corresponding variation in nBMA from 49% to 40%, showed an excellent balance between adhesive, cohesive, and tack strength.