| 摘要 |
The invention provides inherently tacky PSAs that exhibit excellent adhesion to paper, corrugated board and low-energy surfaces, and comprise an acrylic emulsion polymer formed from (a) a plurality of monomers comprising, based on the total weight of monomers, (i) 9 to 40% isobornyl acrylate and (ii) 50 to 91% of one or more alkyl acrylates; (b) at least one initiator; and at least one emulsifier. In an alternate embodiment, the polymer is formed by solvent polymerization, without an emulsifier. A method for making such PSAs is also provided. In one embodiment, polymerization initiators are added to a monomer emulsion in a stepped feed.
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