Patent ID: 7498078

Claim:
Layered pressure-sensitive adhesive comprising: (a) a first layer of a first polyacrylate pressure-sensitive adhesive containing at least 50% by weight, based on the first polyacrylate pressure-sensitive adhesive, of an acrylic and/or methacrylic ester of the formula CH═CH(R 1 )(COOR 2 ) where R 1 is H or CH 3 and R 2 is a linear, branched or cyclic alkyl chain having 1 to 20 carbon atoms, wherein said first layer does not comprise chalk; (b) a second layer comprising: (b1) a polyacrylate containing at least 50% by weight, based on the polyacrylate, of an acrylic and/or methacrylic ester of the formula CH 2 ═CH(R 1 )(COOR 2 ) where R 1 is H or CH 3 and R 2 is a linear, branched or cyclic alkyl chain having 1 to 20 carbon atoms, and (b2) at least 15% by weight, based on the second layer, of chalk; and (c) a third layer of a second polyacrylate pressure-sensitive adhesive containing at least 50% by weight, based on the second polyacrylate pressure-sensitive adhesive, of an acrylic and/or methacrylic ester of the formula CH 2 ═CH(R 1 )(COOR 2 ) where R 1 is H or CH 3 and R 2 is a linear, branched or cyclic alkyl chain having 1 to 20 carbon atoms, wherein said third layer does not comprise chalk, wherein said second layer is between said first layer and said third layer.