Patent ID: 7521507

Claim:
A process of producing an adhesive composition comprising: a) reacting propylene and at least one comonomer selected from the group consisting of ethylene and C 4 to C 20 α-olefins, under polymerization conditions in the presence of a metallocene catalyst capable of incorporating the propylene into isotactic or syndiotactic sequences, in a first reactor to produce a first copolymer having at least 65 mole % propylene; and b) reacting propylene and at least one comonomer selected from the group consisting of ethylene and C 4 to C 20 α-olefins, under polymerization conditions in the presence of a metallocene catalyst capable of incorporating the propylene into isotactic or syndiotactic sequences, in another reactor or subsequent reactors, to produce a second copolymer having at least 65 mol % propylene; c) combining the contents of the first reactor with the contents of the subsequent reactors to form a blend, and; d) adding a tackifier at any time during the process; wherein the first copolymer has a melting point of 25 to 120° C., a melt index (MI) from about 78 dg/min to about 3000 dg/min according to ASTM D 1238 (B) at 190° C., and wherein the MFR, as measured according to ASTM D 1238 at 230° C., of the first copolymer is greater than 250 dg/min.