A pressure sensitive adhesive composition is described, comprising the reaction
product of a copolymer and a bisamide crosslinking agent, (A) the copolymer comprising
the reaction product of (i) a (meth)acrylate ester of a non-tertiary alcohol in
which the alkyl group contains between 1 and 4 carbon atoms, inclusive, and (ii)
a carboxylic acid-functional, ethylenically unsaturated co-monomer, and (B) a bisamide
crosslinking agent having the formula:
##STR1##
where,
- R1 and R3 independently, are selected from the
group consisting of H and CnH2n+1,
- n is an integer ranging from 1 to 5,
- R2 is a divalent radical selected from the group consisting
of benzeno (C6H4), substituted benzeno, triazine,
CmH2m, and combinations thereof,
- m is an integer ranging from 1 to 10, and
the relative amounts of the carboxylic acid-functional, ethylenically unsaturated
co-monomer and the bisamide crosslinking agent providing a ratio of the number
of equivalents of amide groups to the number of equivalents of carboxylic acid
groups of less than about 0.1. Articles made with the pressure sensitive adhesive
composition and methods for its use are also described.
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