Hot melt adhesive with functionalized metallocene catalyzed polyolefins
US9982171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Sep 25, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A hot melt adhesive composition containing a functionalized polymer, namely, a metallocene catalyzed polyolefin elastomer grafted with maleic anhydride, together with a non-functionalized secondary polymer, namely, a metallocene catalyzed random or block polyolefin elastomer having a melt index equal to or greater than 15, a first tackifying resin having a softening point of at least 95° C., and a wax. The composition may optionally include an aromatic reinforcing resin having a softening point equal to or higher than 115° C., and a plasticizer. These hot melts provide superior hot tack, excellent adhesion, flexibility, and heat resistance above 150° F. in applications such as rigid packaging, hot fill packaging, and bottle labeling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.