Patent ID: 6995207
Filing Date: 2006-02-07
Classification: C08L,C09J,Y10S,Y10T

Abstract:
1. A removable, plasticizer resistant pressure sensitive adhesive composition comprising a crosslinked aqueous emulsion polymer comprising: (a) at least one hydrophobic monomer selected from an alkyl (meth)acrylate ester of an alcohol wherein the alkyl portion of the alcohol is linear or branched and contains at least 4 carbon atoms; (b) about 0.2 to about 10 wt. % of at least one hydrophilic monomer; and (c) about 1 to about 40 wt. % of one partially hydrophilic monomer selected from the group consisting of an alkyl (meth)acrylate esters of an alcohol wherein the alkyl portion of the alcohol has 1 to 2 carbon atoms, N-vinyl-2-pyrrolidone, and mixtures thereof; and (d) an effective amount of a crosslinker selected from the group consisting of diallyl maleate and compounds represented by the formula; wherein R is selected from the group consisting of hydrogen, methyl, and ethyl, and R′ is selected from the group consisting of vinyl (—HC═CH wherein said pressure sensitive adhesive does not contain a plasticizer, and wherein said removable, plasticizer resistant pressure sensitive adhesive has an initial peel strength of less than about 0.3 pounds per inch peel force, wherein said crosslinker is selected from the group consisting of allyl acrylate and allyl methacrylate.