Use of a polypropylene based composition for expanded beads
US6930132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2002 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Oct 17, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Use of a polypropylene based composition (C) comprising (a) from 5 to 95% by weight of a random copolymer of propylene (A) containing from 0.5 to 12 mole % of at least one comonomer chosen from ethylene and/or an alpha-olefin containing from 4 to 6 carbon atoms, and having an MFIA in the range from 0.01 to 5 g/10 min, (b) from 95 to 5% by weight of a random copolymer of propylene (B) containing from 0.5 to 12 mole % of at least one comonomer chosen from ethylene and/or an alpha-olefin containing from 4 to 6 carbon atoms, and having an MFIB in the range from 15 to 1000 g/10 min, said composition (C) being such that random copolymers (A) and (B) contain the same comonomer(s) and have, for each comonomer, substantially the same comonomer content, for the manufacturing of expanded beads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.