Pressure-sensitive adhesive crosslinked by copolymerizable aromatic ketone monomers

A precursor composition useful in making a pressure-sensitive skin adhesive, the precursor composition comprising an uncrosslinked copolymer comprised of A monomers and PX monomers, wherein:

• A is a monomeric acrylate or methacrylate ester of a non-tertiary alcohol or a mixture of non-tertiary alcohols, said alcohols having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4-12;
• and
• PX is a copolymerizable mono-ethylenically unsaturated aromatic ketone monomer free of ortho-aromatic hydroxyl groups and has the formula:
• ##STR3## wherein R is lower alkyl or phenyl, provided that R may be optionally substituted with one or more halogen atoms, alkoxy groups or hydroxyl groups, further provided that when R is phenyl substituted with one or more hydroxyl groups, any such hydroxyl groups must be meta or para to the aromatic carbonyl, X is halogen, alkoxy or hydroxyl, provided that when X is a hydroxyl group, that X must be meta or para to the aromatic carbonyl, n is an integer from 0 to 4, Y is a divalent linking group, and Z is an alkenyl group or an ethylenically unsaturated acyl group;
• said PX monomer comprising from about 0.025% to about 0.5% by weight of said copolymer and the degree of polymerization of said copolymer being such that said copolymer has an inherent viscosity of from about 0.5 dl/g to about 1.4 dl/g, whereby said PX containing copolymer is potentially crosslinkable by ultraviolet irradiation of said copolymer such that the skin adhesive composition when crosslinked has a creep compliance of from about 1.2.times.10.sup.-5 cm.sup.2 /dyne to about 2.3.times.10.sup.-5 cm.sup.2 /dyne when measured after about 3 minutes of subjection to stress.