Polypropylene copolymer foams and their use
US6512019B1 · kind B1 · utility
63Cited by
39References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2000 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Apr 10, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2308/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates generally to foamable crystalline propylene polymers obtained from metallocene catalysis and to their methods of production. The foamed crystalline propylene polymers have molecular weight distributions and densities that fall within broad ranges. The crystalline propylene polymers may be prepared in a multiple stage polymerization process using a combination of metallocene components in at least two stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.