Reversible pressure-sensitive adhesive compositions based on acrylate block copolymers

摘要

Psa systems for reversible adhesive bonds, at least comprising a pressure-sensitive adhesive composition based on at least one block copolymer, wherein the parts by weight of the block copolymers in sum of at least 50% of the psa composition, wherein at least one block copolymer of at least partially on the basis of (meth -) acrylic acid derivatives is composed, and furthermore at least one block copolymer of at least the unit (p (a) - p (b) - p (a) of at least one polymer block (p (b) and at least two polymer blocks (p (a) and wherein dollars a - p (a) independently of one another are homo - or copolymer blocks of monomers a, the polymer blocks (p (a) in each case a softening temperature in the range from + 20 deg c. to + 175 deg c, dollars a - p (b) a homo - or block of monomers b represents, wherein the polymer block (p (b) a softening temperature in the range from - 130 deg c. to + 10 deg c, dollars a - the polymer blocks (p (a) and p (b) are not homogeneously miscible with one another, characterized in that dollars a the the polymer blocks p (a) and p (b) corresponding (co) polymers p * (a) and p * (b) in each case a surface tension of 45 mj / m · 2 · have.