Elastic films having improved mechanical and elastic properties and methods for making the same
US8609772B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2011 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Sep 29, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L57/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A film comprising one or more propylene-based polymers, one or more hydrocarbon resins, and one or more polyolefin additives provides enhanced mechanical and elastic properties compared to the neat propylene-based polymer. The propylene-based polymer may have (i) 60 wt % or more units derived from propylene; and (ii) crystallinity of from 0.25% to 40%, resulting from isotactically arranged propylene-derived sequences. The hydrocarbon resin may have a glass transition temperature greater than 20° C. The polyolefin additive may have a crystallinity greater than the crystallinity of the propylene-based polymer. Methods for making and using the films are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.