Polyolefin sheets for thermoforming
US6800710B2 · kind B2 · utility
13Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polypropylene sheet for thermoforming having at least one layer comprises a propylene polymer containing at least 0.8% by weight of ethylene and, optionally, one or more C4-C10 &agr;-olefins, or a propylene polymer composition containing at least 0.8% by weight of one or more comonomers selected from the group consisting of ethylene and C4-C10 &agr;-olefins, and having I) a melting temperature of 155° C. or higher; and II) a xylene soluble fraction at room temperature lower than 4% by weight, and a value of the ratio of the polymer fraction collected at 25° C. to 95° C. to the xylene soluble fraction higher than 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.