PRESSURE-SENSITIVE ADHESIVE TAPES FOR BONDING PRINTING PLATES

Composition for preparing a crosslinked pressure-sensitive adhesive, comprising A. a pressure-sensitive adhesive comprising A1). 60% to 90% by weight of a polymer component based on a) 5% to 25% by weight (based on the polymer component) of one or more compounds 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 compounds having at least one ethylenically unsaturated bond also having at least one carboxyl group, b) 75% to 95% by weight (based on the polymer 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 centres of the crosslinker to the theoretical amount n p of the macromolecules of the polymer component A1 possesses a value between 1.5 and 2.5, the amount n z of the crosslinking-active centres 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 centres per crosslinker molecule, i.e. n z = f .cndot. m v/M v and the theoretical amount n p of the macromolecules of the polymer component A1 being given by the mass m p of the polymer 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. Une composition sert à préparer un adhésif réticulé sensible à la pression comportant A. un adhésif sensible à la pression renfermant A1). 60 à 90 % par poids dune composante polymérique correspondant à a) 5 à 25 % par poids (selon la composante polymérique) dun ou de plusieurs composés ayant au moins un lien non saturé éthyléniquement, les monomères étant chacun sélectionné de sorte que les températures de transition du verre Tg des homopolymères correspondants sont au moins 0 oC, certains des composés ayant au moins un lien non saturé éthyléniquement ayant également au moins un groupe carboxyle, b) 75 à 95 % par poids (selon la composante polymérique) desters dacrylique ou desters méthacryl