Patent ID: 7307115

Claim:
A pressure sensitive adhesive comprised of P(A)-P(B)-P(A) block copolymers, each block copolymer having one middle (co)polymer block P(B) and two end (co)polymer blocks P(A), wherein P(A) represents a (co)polymer block of a component A which is comprised of at least one monomer A1 of the formula where R 1 =H or CH 3 and R 2 is selected from the group consisting of branched or unbranched, saturated alkyl groups having 4 to 14 carbon atoms, the (co)polymer block P(A) having a glass transition temperature of 0° C. or below, P(B) represents a (co)polymer block of a component B which is comprised on at least one monomer B1, the (co)polymer block P(B) having a glass transition temperature of 20° C. or above, the (co)polymer block P(B) is insoluble in the (co)polymer block P(A) and the (co)polymer blocks P(A) and P(B) are immiscible said block copolymer being formed by a Rapid Addition-Fragmentation Transfer (RAFT) mechanism said pressure sensitive adhesive compound further comprising resins which are soluble in polyacrylates, and said pressure sensitive adhesive compound comprising no metal ions.