High melt flow polymer of improved durability for pipe applications
US8557920B2 · kind B2 · utility
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4References
19Claims
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Assignee
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Key dates
| Filing date | May 11, 2006 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Dec 15, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polymer composition, comprising (i) a polypropylene homopolymer, (ii) a polypropylene random copolymer, prepared by copolymerization of propylene with an olefin comonomer and having an amount of olefin comonomer units of 0.2 to 5 wt %, and (iii) an elastomeric copolymer of propylene and at least one olefin comonomer, the polymer composition having a tensile modulus, determined according to ISO 527-2/1 B at 1 mm/min. and 230 C, of at least 1200 MPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.