| 摘要 |
1. A pressure-sensitive adhesive based on aqueous dispersions of polyacrylates which contain acrylic esters of alkanols of 4 to 8 carbon atoms as copolymerized units, the dispersions also containing a plasticizer, which adhesive contains A) from 70 to 90 % by weight of one or more polyacrylate dispersion which overall are synthesized from a) 96 to 84 % by weight of a mixture of (a1 ) 2-ethylhexyl acrylate and (a2 ) n-butyl acrylate and/or isobutyl acrylate and/or n-butyl methacrylate and/or isobutyl methacrylate in a weight ratio of (a1 ) to (a2 ) of from 70:30 to 30:70, b) from 3 to 7 % by weight of acrylonitrile and/or methacrylonitrile, c) from 0.5 to 3 % by weight of acrylic acid and/or methacrylic acid, d) from 0.5 to 5 % by weight of N-methylolacrylamide and/OR N-methylolmethacrylamide, and e) from 0 to 1 % by weight of vinylsulfonic acid, the percentages by weight of a) to e) being based on the weight of the polyacrylates, and B) from 10 to 30 % by weight of plasticizer. |
