C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 133/06 (2006.01) B41F 27/06 (2006.01) B41F 27/14 (2006.01) C09J 7/02 (2006.01)
Patent
CA 2663205
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.
Ellringmann Kai
Fiencke Jochen
Kerber Kristin
Krawinkel Thorsten
Gowling Lafleur Henderson Llp
Tesa Se
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