Patent ID: 8152944

Claim:
Composition for preparing a crosslinked pressure-sensitive adhesive, comprising A. a pressure-sensitive adhesive comprising A1). 60% to 90% by weight of a random copolymer component comprised of a) 5% to 25% by weight, based on the weight of the random copolymer component, of one or more monomers having at least one ethylenically unsaturated bond, the monomers being each selected such that the glass transition temperatures T g of the corresponding homopolymers are at least 0° C., some of the monomers having at least one ethylenically unsaturated bond also having at least one carboxyl group, b) 75% to 95% by weight, based on the weight of the random copolymer component, of acrylic esters and/or methacrylic esters which are each selected such that the glass transition temperatures T g of the corresponding homopolymers are not more than −20° C.; A2). 10% to 40% by weight of at least one resin component having a softening point of at least 100° C., and B. at least one difunctional or polyfunctional crosslinker, the at least one crosslinker being present in an amount such that the chemical-amount ratio V =n z /n p of the amount n z of the crosslinking-active centers of the crosslinker to the theoretical amount n p of the macromolecules of the random copolymer component A1 possesses a value between 1.5 and 2.5, the amount n z of the crosslinking-active centers of the crosslinker being given by the mass m v of the crosslinker, divided by the molar mass M v of the crosslinker, multiplied by the number f of the crosslinking-active centers per crosslinker molecule, i.e. n z =f·m v /M v and the theoretical amount n p of the macromolecules of the random copolymer component A1 being given by the mass m p of the random copolymer component in the pressure-sensitive adhesive, divided by the number average molar mass M n,p of this component, i.e. n p =m p /M n,p .