Rubber-based multilayer pressure-sensitive adhesive assembly

A multilayer pressure sensitive adhesive assembly comprising a polymeric foam layer and a first pressure sensitive adhesive layer adjacent to the polymeric foam layer, wherein first the pressure sensitive adhesive comprises:

• a) a multi-arm block copolymer of the formula Qn-Y, wherein:
• (i) Q represents an arm of the multi-arm block copolymer and each arm independently has the formula G-R,
• (ii) n represents the number of arms and is a whole number of at least 3, and
• (iii) Y is the residue of a multifunctional coupling agent,
• wherein each R is a rubbery block comprising a polymerized conjugated diene, a hydrogenated derivative of a polymerized conjugated diene, or combinations thereof;
• and each G is a glassy block comprising a polymerized monovinyl aromatic monomer;
• b) a polymeric plasticizer having a weight average molecular weight Mw of at least 10,000 g/mol;
• c) at least one hydrocarbon tackifiers selected from the group consisting of polymeric terpenes, coumarone-indene resins, C5-based hydrocarbon resins, C9-based hydrocarbon resins, C5/C9-based hydrocarbon resins, dicyclopentadiene-based hydrocarbon resins, and hydrogenated hydrocarbon resins, wherein the hydrocarbon tackifier(s) have a Volatile Organic Compound (VOC) value of less than 1000 ppm, when measured by thermogravimetric analysis according to the weight loss test methods described in the experimental section;
• and
• d) optionally, a linear block copolymer of the formula L-(G)m, wherein L is a rubbery block comprising a polymerized olefin, a polymerized conjugated diene, a hydrogenated derivative of a polymerized conjugated diene, or any combinations thereof;
• and wherein m is 1 or 2;
• wherein the multilayer pressure sensitive adhesive assembly is obtained by hotmelt co-extrusion of the polymeric foam layer and the first pressure sensitive adhesive layer.