Ethylene-&agr;-olefin copolymer and polyethylene composition
US6667375B1 · kind B1 · utility
3Cited by
8References
4Claims
0Family size
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Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ethylene-&agr;-olefin copolymer obtained by a gas phase polymerization method in the presence of a catalyst, wherein the copolymer satisfies the following conditions (A-1) to (A-4):(A-1) Melt flow rate (MFR): 0.3 to 5.0 g/10 minutes(A-2) Melt flow rate ratio (MFRR): 20 or more(A-3) Density (d): 0.910 to 0.930 g/cm3 (A-4) Coldxylene-soluble portion (CXS)(wt %) is in the range defined by the formula (1):1.5×10−4×d−125×MFR0.5+0.3≧CXS  formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.