Broad molecular weight distribution polypropylenes with high melt flow rates and high flexural modulus
US11459453B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | May 9, 2018 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Apr 29, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a reactor grade polypropylene suitable for injection molding applications comprising within a range from 0 wt % to 4 wt % ethylene and/or C4 to C12 α-olefin derived units, the polypropylene produced from a single catalyst and single stage polymerization process, and having a melt flow rate (MFR, 230° C./2.16 kg) greater than 10 g/10 min, and a 1% secant flexural modulus of at least 250 kpsi (1720 MPa).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.