Hot melt adhesive compositions and bottle assemblies using said compositions

Abstract

A hot melt adhesive especially useful for producing PET bottle assemblies comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent. PET bottle assemblies prepared using the above adhesive compositions are more resistant to separation than those prepared with prior art compositions not containing the ethylene/vinyl acetate copolymer.

Dependencies are inferred from the claim text.