Patent ID: 8263696

Claim:
A hot melt pressure sensitive adhesive (HMPSA) composition comprising: a) from 30 to 50% of a mixture of styrenic block copolymers comprising: 10 to 70% of at least one SX 1 S triblock copolymer, and 30 to 90% of at least one SX 2 diblock copolymer; wherein: S represents a polymerized segment of a styrene monomer, X 1 and X 2 , are identical or different, and each represents an elastomeric polymerized segment of one or two monomers comprising isoprene, butadiene or their respective hydrogenated derivatives; wherein the overall styrene monomer content in said mixture of styrenic block copolymers is between 14 and 40%; b) from 40 to 55% of one or more tackifying resin(s), each of the one or more tackifying resin(s) having a softening temperature of between 70 and 150° C., wherein the one or more tackifying resin(s) comprises a tackifying resin (i) obtainable by hydrogenating, polymerizing or copolymerizing mixtures of aliphatic unsaturated hydrocarbons having from 5, 9 or 10 carbon atoms; c) from 4 to 20% of a hydrocarbon oil with an aromatic content less than 15%; and d) from 1 to 6% of a filler comprising a low number average molecular weight homopolymer or copolymer of polyethylene.