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Abstract

A hot melt adhesive polyolefin composition having a viscosity from 7,000 to less than 500,000 mPa.multidot.sec, at 190.degree. C. including (by weight): I) 5-85% of a crystalline propylene polymer selected from a propylene homopolymer and a copolymer of propylene and ethylene or a C.sub.4 -C.sub.10 .alpha.-olefin or blends thereof, having an isotactic index from 80 to 98%; II) 5-85% of an heterophasic polyolefin composition including: (i) a crystalline propylene polymer and (ii) and an amorphous copolymer of ethylene and propylene or a C.sub.4 -C.sub.10 .alpha.-olefin or blends thereof, containing less than 40% of ethylene; III) 10-75% of a material selected from aliphatic hydrocarbon resins, terpene/phenolic resin, polyterpenes, rosin, rosin esters and blends thereof; and optionally IV) a mineral paraffinic or naphthalenic oil, an amorphous poly(.alpha.-olefin) having low molecular weight or a mixture thereof.

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First Claim