Polyolefin based hot melt adhesive composition
US6486246B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Oct 4, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A hot melt adhesive polyolefin composition having a viscosity from 7,000 to less than 500,000 mPa·sec, at 190° 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 C4-C10 &agr;-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 C4-C10 &agr;-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(&agr;-olefin) having low molecular weight or a mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.