Elastic blends of semicrystalline propylene polymers and high glass transition temperature materials
US7244787B2 · kind B2 · utility
17Cited by
14References
50Claims
0Family size
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Key dates
| Filing date | Oct 7, 2005 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Oct 7, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions are provided having from 70 wt % to 95 wt % of a polymer selected from homopolymers and random copolymers of propylene and from 5 wt % to 30 wt % of a miscible hydrocarbon resin with a glass transition temperature greater than 20° C. The polymer has a heat of fusion of less than 50 J/g, a melt index (MI) of less than 20 dg/min, and contains stereoregular propylene crystallinity. Also provided are films containing such compositions, and articles, such as diapers or incontinence garments, including such films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.