A releasable pressure sensitive adhesive composition comprising:
(a) a block copolymer comprising at least one poly(monovinyl aromatic
hydrocarbon) block and at least one poly(conjugated diene) block and
having a vinyl content of at least 3% by weight,
(b) a tackifying resin, and
(c) a plasticizer,
wherein the block copolymer has been crosslinked through its vinyl groups
by means of a reaction with an organohydrogenpolysiloxane crosslinking
agent containing at least two hydrogen atoms which are directly bonded to
a silicon atom. This is carried out in the presence of a crosslinking
catalyst. The plasticizer is present in an amount of from 1 to 50 parts by
weight per 100 parts by weight of block copolymer. The releasable adhesive
composition can be suitably applied in removable self-adhering memo notes
and in removable tapes and labels.
