Homopolypropylene and method for preparing the same
US11117990B2 · kind B2 · utility
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3References
20Claims
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Key dates
| Filing date | Dec 20, 2018 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Apr 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2500/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A homopolypropylene has i) a molecular weight distribution of less than 2.4; ii) a melt index (measured at 230° C. under a load of 2.16 kg in accordance with ASTM D1238) of 5 to 3000 g/10 min; iii) a remaining stress ratio of 0.5% or less; and iv) a complex viscosity of 5 to 600 Pa·s at an angular frequency of 1 rad/s and a complex viscosity of 5 to 300 Pa·s at an angular frequency of 100 rad/s. A method for preparing the homopolyproylene is also provided. A molded article and a non-woven fabric are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.