POLYPROPYLENE-BASED ADHESIVE COMPOSITIONS

摘要

An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting o f ethylene and at least one C4 to C20 .alpha.-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; a melt index (MI) from about 7dg/min to about 3000 dg/min as measured by ASTM D 1238(B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flo w rates (MFRs) equal to and above 250 dg/min at 230NC. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.