| 摘要 |
Acrylic copolymer PSA compositions having enhanced peel strength without substantially decreasing shear properties have been formulated by producing the copolymer with a broad molecular weight distribution such that the ratio Mw/Mn is above 6, preferably above 10. The alkyl(meth)acrylate and (meth)acrylic acid monomers are emulsion polymerized over a temperature profile wherein the difference between the maximum and minimum polymerization temperatures is at least about 40 DEG C and less than about 70 DEG C, preferably using a redox initiator system such as bromate/bisulfite. |
