Tubes obtained from a propylene polymer composition
US6933347B2 · kind B2 · utility
2Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Mar 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S138/07
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tubes formed from a propylene based composition having a flexural modulus of elasticity of 1,400 to 2,000 MPa and a melt flow index of 0.1 to 1 g/10 minutes, including: from 80 to 97 parts in weight of a propylene homopolymer (A) having an isotacticity index of at least 0.96, and from 20 to 3 parts in weight of a statistical copolymer of propylene (B) containing from 45% to 70% ethylene by mole and/or an alpha olefin containing from 4 to 8 atoms of carbon, the ratio of the intrinsic viscosity of polymer (B) to polymer (A) being at least 1.55 and less than or equal to 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.