The present invention relates to an ethylene/.alpha.-olefin interpolymer
product comprising at least one .alpha.-olefin interpolymerized with
ethylene and, characterized in at least one aspect, as having improved
properties when utilized in a hot melt adhesive formulation. The
invention also relates to a process for manufacturing the interpolymer
product wherein the process comprises employing two or more single site
catalyst systems in at least one reaction environment (or reactor) and
wherein the at least two catalyst systems have (a) different comonomer
incorporation capabilities or reactivities and/or (b) different
termination kinetics, both when measured under the same polymerization
conditions. The interpolymer products are useful, for example, in
applications such as hot melt adhesives, and also for impact, bitumen and
asphalt modification, adhesives, dispersions or latexes and fabricated
articles such as, but not limited to, foams, films, sheet, moldings,
thermoforms, profiles and fibers.